From 4bb93349d9d001f565aafe2a1890cbb6e4476b58 Mon Sep 17 00:00:00 2001 From: Markus Pargmann Date: Tue, 29 Jul 2014 09:24:43 +0200 Subject: gpio: pca953x: Drop deprecated DT bindings Drop deprecated DT bindings and use automaticly assigned gpio and irq bases. Signed-off-by: Markus Pargmann Signed-off-by: Linus Walleij --- drivers/gpio/gpio-pca953x.c | 54 +++------------------------------------------ 1 file changed, 3 insertions(+), 51 deletions(-) (limited to 'drivers') diff --git a/drivers/gpio/gpio-pca953x.c b/drivers/gpio/gpio-pca953x.c index f9961eea2120..e2da64abbccd 100644 --- a/drivers/gpio/gpio-pca953x.c +++ b/drivers/gpio/gpio-pca953x.c @@ -520,7 +520,7 @@ static int pca953x_irq_setup(struct pca953x_chip *chip, struct i2c_client *client = chip->client; int ret, i, offset = 0; - if (irq_base != -1 + if (client->irq && irq_base != -1 && (id->driver_data & PCA_INT)) { switch (chip->chip_type) { @@ -586,50 +586,6 @@ static int pca953x_irq_setup(struct pca953x_chip *chip, } #endif -/* - * Handlers for alternative sources of platform_data - */ -#ifdef CONFIG_OF_GPIO -/* - * Translate OpenFirmware node properties into platform_data - * WARNING: This is DEPRECATED and will be removed eventually! - */ -static void -pca953x_get_alt_pdata(struct i2c_client *client, int *gpio_base, u32 *invert) -{ - struct device_node *node; - const __be32 *val; - int size; - - *gpio_base = -1; - - node = client->dev.of_node; - if (node == NULL) - return; - - val = of_get_property(node, "linux,gpio-base", &size); - WARN(val, "%s: device-tree property 'linux,gpio-base' is deprecated!", __func__); - if (val) { - if (size != sizeof(*val)) - dev_warn(&client->dev, "%s: wrong linux,gpio-base\n", - node->full_name); - else - *gpio_base = be32_to_cpup(val); - } - - val = of_get_property(node, "polarity", NULL); - WARN(val, "%s: device-tree property 'polarity' is deprecated!", __func__); - if (val) - *invert = *val; -} -#else -static void -pca953x_get_alt_pdata(struct i2c_client *client, int *gpio_base, u32 *invert) -{ - *gpio_base = -1; -} -#endif - static int device_pca953x_init(struct pca953x_chip *chip, u32 invert) { int ret; @@ -704,12 +660,8 @@ static int pca953x_probe(struct i2c_client *client, invert = pdata->invert; chip->names = pdata->names; } else { - pca953x_get_alt_pdata(client, &chip->gpio_start, &invert); -#ifdef CONFIG_OF_GPIO - /* If I2C node has no interrupts property, disable GPIO interrupts */ - if (of_find_property(client->dev.of_node, "interrupts", NULL) == NULL) - irq_base = -1; -#endif + chip->gpio_start = -1; + irq_base = 0; } chip->client = client; -- cgit From 29cbf4589fc0dabef4dfc95dd9589c366ad2ec46 Mon Sep 17 00:00:00 2001 From: Feng Kan Date: Thu, 31 Jul 2014 12:03:25 -0700 Subject: gpio: Add APM X-Gene SoC GPIO controller support Add APM X-Gene SoC gpio controller driver. Signed-off-by: Feng Kan Signed-off-by: Linus Walleij --- drivers/gpio/Kconfig | 9 ++ drivers/gpio/Makefile | 1 + drivers/gpio/gpio-xgene.c | 250 ++++++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 260 insertions(+) create mode 100644 drivers/gpio/gpio-xgene.c (limited to 'drivers') diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig index 9de1515e5808..1fe93eb61927 100644 --- a/drivers/gpio/Kconfig +++ b/drivers/gpio/Kconfig @@ -334,6 +334,15 @@ config GPIO_TZ1090_PDC help Say yes here to support Toumaz Xenif TZ1090 PDC GPIOs. +config GPIO_XGENE + bool "APM X-Gene GPIO controller support" + depends on ARM64 && OF_GPIO + help + This driver is to support the GPIO block within the APM X-Gene SoC + platform's generic flash controller. The GPIO pins are muxed with + the generic flash controller's address and data pins. Say yes + here to enable the GFC GPIO functionality. + config GPIO_XILINX bool "Xilinx GPIO support" depends on PPC_OF || MICROBLAZE || ARCH_ZYNQ diff --git a/drivers/gpio/Makefile b/drivers/gpio/Makefile index 5d024e396622..e5d346cf3b6e 100644 --- a/drivers/gpio/Makefile +++ b/drivers/gpio/Makefile @@ -101,6 +101,7 @@ obj-$(CONFIG_GPIO_VX855) += gpio-vx855.o obj-$(CONFIG_GPIO_WM831X) += gpio-wm831x.o obj-$(CONFIG_GPIO_WM8350) += gpio-wm8350.o obj-$(CONFIG_GPIO_WM8994) += gpio-wm8994.o +obj-$(CONFIG_GPIO_XGENE) += gpio-xgene.o obj-$(CONFIG_GPIO_XILINX) += gpio-xilinx.o obj-$(CONFIG_GPIO_XTENSA) += gpio-xtensa.o obj-$(CONFIG_GPIO_ZEVIO) += gpio-zevio.o diff --git a/drivers/gpio/gpio-xgene.c b/drivers/gpio/gpio-xgene.c new file mode 100644 index 000000000000..e25ba14fbb64 --- /dev/null +++ b/drivers/gpio/gpio-xgene.c @@ -0,0 +1,250 @@ +/* + * AppliedMicro X-Gene SoC GPIO Driver + * + * Copyright (c) 2014, Applied Micro Circuits Corporation + * Author: Feng Kan . + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see . + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#define GPIO_SET_DR_OFFSET 0x0C +#define GPIO_DATA_OFFSET 0x14 +#define GPIO_BANK_STRIDE 0x0C + +#define XGENE_GPIOS_PER_BANK 16 +#define XGENE_MAX_GPIO_BANKS 3 +#define XGENE_MAX_GPIOS (XGENE_GPIOS_PER_BANK * XGENE_MAX_GPIO_BANKS) + +#define GPIO_BIT_OFFSET(x) (x % XGENE_GPIOS_PER_BANK) +#define GPIO_BANK_OFFSET(x) ((x / XGENE_GPIOS_PER_BANK) * GPIO_BANK_STRIDE) + +struct xgene_gpio; + +struct xgene_gpio { + struct gpio_chip chip; + void __iomem *base; + spinlock_t lock; +#ifdef CONFIG_PM + u32 set_dr_val[XGENE_MAX_GPIO_BANKS]; +#endif +}; + +static inline struct xgene_gpio *to_xgene_gpio(struct gpio_chip *chip) +{ + return container_of(chip, struct xgene_gpio, chip); +} + +static int xgene_gpio_get(struct gpio_chip *gc, unsigned int offset) +{ + struct xgene_gpio *chip = to_xgene_gpio(gc); + unsigned long bank_offset; + u32 bit_offset; + + bank_offset = GPIO_DATA_OFFSET + GPIO_BANK_OFFSET(offset); + bit_offset = GPIO_BIT_OFFSET(offset); + return !!(ioread32(chip->base + bank_offset) & BIT(bit_offset)); +} + +static void __xgene_gpio_set(struct gpio_chip *gc, unsigned int offset, int val) +{ + struct xgene_gpio *chip = to_xgene_gpio(gc); + unsigned long bank_offset; + u32 setval, bit_offset; + + bank_offset = GPIO_SET_DR_OFFSET + GPIO_BANK_OFFSET(offset); + bit_offset = GPIO_BIT_OFFSET(offset) + XGENE_GPIOS_PER_BANK; + + setval = ioread32(chip->base + bank_offset); + if (val) + setval |= BIT(bit_offset); + else + setval &= ~BIT(bit_offset); + iowrite32(setval, chip->base + bank_offset); +} + +static void xgene_gpio_set(struct gpio_chip *gc, unsigned int offset, int val) +{ + struct xgene_gpio *chip = to_xgene_gpio(gc); + unsigned long flags; + + spin_lock_irqsave(&chip->lock, flags); + __xgene_gpio_set(gc, offset, val); + spin_unlock_irqrestore(&chip->lock, flags); +} + +static int xgene_gpio_dir_in(struct gpio_chip *gc, unsigned int offset) +{ + struct xgene_gpio *chip = to_xgene_gpio(gc); + unsigned long flags, bank_offset; + u32 dirval, bit_offset; + + bank_offset = GPIO_SET_DR_OFFSET + GPIO_BANK_OFFSET(offset); + bit_offset = GPIO_BIT_OFFSET(offset); + + spin_lock_irqsave(&chip->lock, flags); + + dirval = ioread32(chip->base + bank_offset); + dirval |= BIT(bit_offset); + iowrite32(dirval, chip->base + bank_offset); + + spin_unlock_irqrestore(&chip->lock, flags); + + return 0; +} + +static int xgene_gpio_dir_out(struct gpio_chip *gc, + unsigned int offset, int val) +{ + struct xgene_gpio *chip = to_xgene_gpio(gc); + unsigned long flags, bank_offset; + u32 dirval, bit_offset; + + bank_offset = GPIO_SET_DR_OFFSET + GPIO_BANK_OFFSET(offset); + bit_offset = GPIO_BIT_OFFSET(offset); + + spin_lock_irqsave(&chip->lock, flags); + + dirval = ioread32(chip->base + bank_offset); + dirval &= ~BIT(bit_offset); + iowrite32(dirval, chip->base + bank_offset); + __xgene_gpio_set(gc, offset, val); + + spin_unlock_irqrestore(&chip->lock, flags); + + return 0; +} + +#ifdef CONFIG_PM +static int xgene_gpio_suspend(struct device *dev) +{ + struct xgene_gpio *gpio = dev_get_drvdata(dev); + unsigned long bank_offset; + unsigned int bank; + + for (bank = 0; bank < XGENE_MAX_GPIO_BANKS; bank++) { + bank_offset = GPIO_SET_DR_OFFSET + bank * GPIO_BANK_STRIDE; + gpio->set_dr_val[bank] = ioread32(gpio->base + bank_offset); + } + return 0; +} + +static int xgene_gpio_resume(struct device *dev) +{ + struct xgene_gpio *gpio = dev_get_drvdata(dev); + unsigned long bank_offset; + unsigned int bank; + + for (bank = 0; bank < XGENE_MAX_GPIO_BANKS; bank++) { + bank_offset = GPIO_SET_DR_OFFSET + bank * GPIO_BANK_STRIDE; + iowrite32(gpio->set_dr_val[bank], gpio->base + bank_offset); + } + return 0; +} + +static SIMPLE_DEV_PM_OPS(xgene_gpio_pm, xgene_gpio_suspend, xgene_gpio_resume); +#define XGENE_GPIO_PM_OPS (&xgene_gpio_pm) +#else +#define XGENE_GPIO_PM_OPS NULL +#endif + +static int xgene_gpio_probe(struct platform_device *pdev) +{ + struct resource *res; + struct xgene_gpio *gpio; + int err = 0; + + gpio = devm_kzalloc(&pdev->dev, sizeof(*gpio), GFP_KERNEL); + if (!gpio) { + err = -ENOMEM; + goto err; + } + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + gpio->base = devm_ioremap_nocache(&pdev->dev, res->start, + resource_size(res)); + if (IS_ERR(gpio->base)) { + err = PTR_ERR(gpio->base); + goto err; + } + + gpio->chip.ngpio = XGENE_MAX_GPIOS; + + gpio->chip.dev = &pdev->dev; + gpio->chip.direction_input = xgene_gpio_dir_in; + gpio->chip.direction_output = xgene_gpio_dir_out; + gpio->chip.get = xgene_gpio_get; + gpio->chip.set = xgene_gpio_set; + gpio->chip.label = dev_name(&pdev->dev); + gpio->chip.base = -1; + + platform_set_drvdata(pdev, gpio); + + err = gpiochip_add(&gpio->chip); + if (err) { + dev_err(&pdev->dev, + "failed to register gpiochip.\n"); + goto err; + } + + dev_info(&pdev->dev, "X-Gene GPIO driver registered.\n"); + return 0; +err: + dev_err(&pdev->dev, "X-Gene GPIO driver registration failed.\n"); + return err; +} + +static int xgene_gpio_remove(struct platform_device *pdev) +{ + struct xgene_gpio *gpio = platform_get_drvdata(pdev); + int ret = 0; + + ret = gpiochip_remove(&gpio->chip); + if (ret) + dev_err(&pdev->dev, "unable to remove gpio_chip.\n"); + return ret; +} + +#ifdef CONFIG_OF +static const struct of_device_id xgene_gpio_of_match[] = { + { .compatible = "apm,xgene-gpio", }, + {}, +}; +MODULE_DEVICE_TABLE(of, xgene_gpio_of_match); +#endif + +static struct platform_driver xgene_gpio_driver = { + .driver = { + .name = "xgene-gpio", + .owner = THIS_MODULE, + .of_match_table = xgene_gpio_of_match, + .pm = XGENE_GPIO_PM_OPS, + }, + .probe = xgene_gpio_probe, + .remove = xgene_gpio_remove, +}; + +module_platform_driver(xgene_gpio_driver); + +MODULE_AUTHOR("Feng Kan "); +MODULE_DESCRIPTION("APM X-Gene GPIO driver"); +MODULE_LICENSE("GPL"); -- cgit From 51dd2e8ec99cc83bd787f836f1d812f384a61dff Mon Sep 17 00:00:00 2001 From: Michal Simek Date: Wed, 13 Aug 2014 14:01:21 +0200 Subject: gpio: zynq: Remove .owner field for driver There is no need to init .owner field. Based on the patch from Peter Griffin "mmc: remove .owner field for drivers using module_platform_driver" This patch removes the superflous .owner field for drivers which use the module_platform_driver API, as this is overriden in platform_driver_register anyway." Signed-off-by: Michal Simek Signed-off-by: Linus Walleij --- drivers/gpio/gpio-zynq.c | 1 - 1 file changed, 1 deletion(-) (limited to 'drivers') diff --git a/drivers/gpio/gpio-zynq.c b/drivers/gpio/gpio-zynq.c index 31ad5df5dbc9..6e5146c8e254 100644 --- a/drivers/gpio/gpio-zynq.c +++ b/drivers/gpio/gpio-zynq.c @@ -688,7 +688,6 @@ MODULE_DEVICE_TABLE(of, zynq_gpio_of_match); static struct platform_driver zynq_gpio_driver = { .driver = { .name = DRIVER_NAME, - .owner = THIS_MODULE, .pm = &zynq_gpio_dev_pm_ops, .of_match_table = zynq_gpio_of_match, }, -- cgit From 5a2533a7478334593c50284fd414c70b3b9217c0 Mon Sep 17 00:00:00 2001 From: Lars-Peter Clausen Date: Mon, 18 Aug 2014 11:54:55 +0200 Subject: gpio: zynq: Reduce level of indention in zynq_gpio_irqhandler() zynq_gpio_irqhandler() uses up to 7 tabs of indention in some parts. Refactor things to use a helper function for the inner loop to reduce the indention to a sane level. Signed-off-by: Lars-Peter Clausen Signed-off-by: Linus Walleij --- drivers/gpio/gpio-zynq.c | 31 +++++++++++++++++++------------ 1 file changed, 19 insertions(+), 12 deletions(-) (limited to 'drivers') diff --git a/drivers/gpio/gpio-zynq.c b/drivers/gpio/gpio-zynq.c index 6e5146c8e254..36034b6811bb 100644 --- a/drivers/gpio/gpio-zynq.c +++ b/drivers/gpio/gpio-zynq.c @@ -457,6 +457,24 @@ static struct irq_chip zynq_gpio_edge_irqchip = { .irq_set_wake = zynq_gpio_set_wake, }; +static void zynq_gpio_handle_bank_irq(struct zynq_gpio *gpio, + unsigned int bank_num, + unsigned long pending) +{ + struct irq_domain *irqdomain = gpio->chip.irqdomain; + int offset; + + if (!pending) + return; + + for_each_set_bit(offset, &pending, 32) { + unsigned int gpio_irq; + + gpio_irq = irq_find_mapping(irqdomain, offset); + generic_handle_irq(gpio_irq); + } +} + /** * zynq_gpio_irqhandler - IRQ handler for the gpio banks of a gpio device * @irq: irq number of the gpio bank where interrupt has occurred @@ -482,18 +500,7 @@ static void zynq_gpio_irqhandler(unsigned int irq, struct irq_desc *desc) ZYNQ_GPIO_INTSTS_OFFSET(bank_num)); int_enb = readl_relaxed(gpio->base_addr + ZYNQ_GPIO_INTMASK_OFFSET(bank_num)); - int_sts &= ~int_enb; - if (int_sts) { - int offset; - unsigned long pending = int_sts; - - for_each_set_bit(offset, &pending, 32) { - unsigned int gpio_irq = - irq_find_mapping(gpio->chip.irqdomain, - offset); - generic_handle_irq(gpio_irq); - } - } + zynq_gpio_handle_bank_irq(gpio, bank_num, int_sts & ~int_enb); } chained_irq_exit(irqchip, desc); -- cgit From e46cf32ced90d00972d5c3d9322cdb848d183338 Mon Sep 17 00:00:00 2001 From: Alexandre Courbot Date: Tue, 19 Aug 2014 10:06:08 -0700 Subject: gpio: acpi: normalize use of gpiochip_get_desc() GPIO descriptors are changing from unique and permanent tokens to allocated resources. Therefore gpiochip_get_desc() cannot be used as a way to obtain a global GPIO descriptor anymore. This patch updates the gpiolib ACPI support code to keep and use the descriptor returned by a centralized call to gpiochip_get_desc(). Signed-off-by: Alexandre Courbot Tested-by: Mika Westerberg Signed-off-by: Linus Walleij --- drivers/gpio/gpiolib-acpi.c | 22 ++++++++++++++-------- 1 file changed, 14 insertions(+), 8 deletions(-) (limited to 'drivers') diff --git a/drivers/gpio/gpiolib-acpi.c b/drivers/gpio/gpiolib-acpi.c index d62eaaa75397..84540025aa08 100644 --- a/drivers/gpio/gpiolib-acpi.c +++ b/drivers/gpio/gpiolib-acpi.c @@ -25,10 +25,12 @@ struct acpi_gpio_event { acpi_handle handle; unsigned int pin; unsigned int irq; + struct gpio_desc *desc; }; struct acpi_gpio_connection { struct list_head node; + unsigned int pin; struct gpio_desc *desc; }; @@ -197,6 +199,7 @@ static acpi_status acpi_gpiochip_request_interrupt(struct acpi_resource *ares, event->handle = evt_handle; event->irq = irq; event->pin = pin; + event->desc = desc; ret = request_threaded_irq(event->irq, NULL, handler, irqflags, "ACPI:Event", event); @@ -280,7 +283,7 @@ void acpi_gpiochip_free_interrupts(struct gpio_chip *chip) struct gpio_desc *desc; free_irq(event->irq, event); - desc = gpiochip_get_desc(chip, event->pin); + desc = event->desc; if (WARN_ON(IS_ERR(desc))) continue; gpio_unlock_as_irq(chip, event->pin); @@ -406,24 +409,26 @@ acpi_gpio_adr_space_handler(u32 function, acpi_physical_address address, struct gpio_desc *desc; bool found; - desc = gpiochip_get_desc(chip, pin); - if (IS_ERR(desc)) { - status = AE_ERROR; - goto out; - } - mutex_lock(&achip->conn_lock); found = false; list_for_each_entry(conn, &achip->conns, node) { - if (conn->desc == desc) { + if (conn->pin == pin) { found = true; + desc = conn->desc; break; } } if (!found) { int ret; + desc = gpiochip_get_desc(chip, pin); + if (IS_ERR(desc)) { + status = AE_ERROR; + mutex_unlock(&achip->conn_lock); + goto out; + } + ret = gpiochip_request_own_desc(desc, "ACPI:OpRegion"); if (ret) { status = AE_ERROR; @@ -462,6 +467,7 @@ acpi_gpio_adr_space_handler(u32 function, acpi_physical_address address, goto out; } + conn->pin = pin; conn->desc = desc; list_add_tail(&conn->node, &achip->conns); } -- cgit From abdc08a3a263a20e49534a36291d657bf53dda5b Mon Sep 17 00:00:00 2001 From: Alexandre Courbot Date: Tue, 19 Aug 2014 10:06:09 -0700 Subject: gpio: change gpiochip_request_own_desc() prototype The current prototype of gpiochip_request_own_desc() requires to obtain a pointer to a descriptor. This is in contradiction to all other GPIO request schemes, and imposes an extra step of obtaining a descriptor to drivers. Most drivers actually cannot even perform that step since the function that does it (gpichip_get_desc()) is gpiolib-private. Change gpiochip_request_own_desc() to return a descriptor from a (chip, hwnum) tuple and update users of this function (currently gpiolib-acpi only). Signed-off-by: Alexandre Courbot Tested-by: Mika Westerberg Signed-off-by: Linus Walleij --- drivers/gpio/gpiolib-acpi.c | 20 +++----------------- drivers/gpio/gpiolib.c | 18 ++++++++++++++---- 2 files changed, 17 insertions(+), 21 deletions(-) (limited to 'drivers') diff --git a/drivers/gpio/gpiolib-acpi.c b/drivers/gpio/gpiolib-acpi.c index 84540025aa08..f9103e72e2a4 100644 --- a/drivers/gpio/gpiolib-acpi.c +++ b/drivers/gpio/gpiolib-acpi.c @@ -145,14 +145,8 @@ static acpi_status acpi_gpiochip_request_interrupt(struct acpi_resource *ares, if (!handler) return AE_BAD_PARAMETER; - desc = gpiochip_get_desc(chip, pin); + desc = gpiochip_request_own_desc(chip, pin, "ACPI:Event"); if (IS_ERR(desc)) { - dev_err(chip->dev, "Failed to get GPIO descriptor\n"); - return AE_ERROR; - } - - ret = gpiochip_request_own_desc(desc, "ACPI:Event"); - if (ret) { dev_err(chip->dev, "Failed to request GPIO\n"); return AE_ERROR; } @@ -420,22 +414,14 @@ acpi_gpio_adr_space_handler(u32 function, acpi_physical_address address, } } if (!found) { - int ret; - - desc = gpiochip_get_desc(chip, pin); + desc = gpiochip_request_own_desc(chip, pin, + "ACPI:OpRegion"); if (IS_ERR(desc)) { status = AE_ERROR; mutex_unlock(&achip->conn_lock); goto out; } - ret = gpiochip_request_own_desc(desc, "ACPI:OpRegion"); - if (ret) { - status = AE_ERROR; - mutex_unlock(&achip->conn_lock); - goto out; - } - switch (agpio->io_restriction) { case ACPI_IO_RESTRICT_INPUT: gpiod_direction_input(desc); diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c index 15cc0bb65dda..a5831d6a9b91 100644 --- a/drivers/gpio/gpiolib.c +++ b/drivers/gpio/gpiolib.c @@ -895,12 +895,22 @@ EXPORT_SYMBOL_GPL(gpiochip_is_requested); * allows the GPIO chip module to be unloaded as needed (we assume that the * GPIO chip driver handles freeing the GPIOs it has requested). */ -int gpiochip_request_own_desc(struct gpio_desc *desc, const char *label) +struct gpio_desc *gpiochip_request_own_desc(struct gpio_chip *chip, u16 hwnum, + const char *label) { - if (!desc || !desc->chip) - return -EINVAL; + struct gpio_desc *desc = gpiochip_get_desc(chip, hwnum); + int err; + + if (IS_ERR(desc)) { + chip_err(chip, "failed to get GPIO descriptor\n"); + return desc; + } + + err = __gpiod_request(desc, label); + if (err < 0) + return ERR_PTR(err); - return __gpiod_request(desc, label); + return desc; } EXPORT_SYMBOL_GPL(gpiochip_request_own_desc); -- cgit From 0752e169ba523e35f70d2fee4d06680b33e0e202 Mon Sep 17 00:00:00 2001 From: Linus Walleij Date: Mon, 2 Jun 2014 15:17:54 +0200 Subject: gpio: adnp: switch to use irqchip helpers This switches the ADNP GPIO driver to use the gpiolib irqchip helpers. Also do some random refactoring to make it look like most other GPIO drivers. Cc: Roland Stigge Cc: Lars Poeschel Cc: Thierry Reding Signed-off-by: Linus Walleij --- drivers/gpio/Kconfig | 1 + drivers/gpio/gpio-adnp.c | 155 ++++++++++++++--------------------------------- 2 files changed, 48 insertions(+), 108 deletions(-) (limited to 'drivers') diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig index 1fe93eb61927..ec27ec0be8c2 100644 --- a/drivers/gpio/Kconfig +++ b/drivers/gpio/Kconfig @@ -690,6 +690,7 @@ config GPIO_ADP5588_IRQ config GPIO_ADNP tristate "Avionic Design N-bit GPIO expander" depends on I2C && OF_GPIO + select GPIOLIB_IRQCHIP help This option enables support for N GPIOs found on Avionic Design I2C GPIO expanders. The register space will be extended by powers diff --git a/drivers/gpio/gpio-adnp.c b/drivers/gpio/gpio-adnp.c index 416b2200d4f1..d3d0a90fe542 100644 --- a/drivers/gpio/gpio-adnp.c +++ b/drivers/gpio/gpio-adnp.c @@ -6,10 +6,9 @@ * published by the Free Software Foundation. */ -#include +#include #include #include -#include #include #include #include @@ -27,8 +26,6 @@ struct adnp { unsigned int reg_shift; struct mutex i2c_lock; - - struct irq_domain *domain; struct mutex irq_lock; u8 *irq_enable; @@ -253,6 +250,7 @@ static void adnp_gpio_dbg_show(struct seq_file *s, struct gpio_chip *chip) static int adnp_gpio_setup(struct adnp *adnp, unsigned int num_gpios) { struct gpio_chip *chip = &adnp->gpio; + int err; adnp->reg_shift = get_count_order(num_gpios) - 3; @@ -272,6 +270,10 @@ static int adnp_gpio_setup(struct adnp *adnp, unsigned int num_gpios) chip->of_node = chip->dev->of_node; chip->owner = THIS_MODULE; + err = gpiochip_add(chip); + if (err) + return err; + return 0; } @@ -326,7 +328,8 @@ static irqreturn_t adnp_irq(int irq, void *data) for_each_set_bit(bit, &pending, 8) { unsigned int child_irq; - child_irq = irq_find_mapping(adnp->domain, base + bit); + child_irq = irq_find_mapping(adnp->gpio.irqdomain, + base + bit); handle_nested_irq(child_irq); } } @@ -334,35 +337,32 @@ static irqreturn_t adnp_irq(int irq, void *data) return IRQ_HANDLED; } -static int adnp_gpio_to_irq(struct gpio_chip *chip, unsigned offset) -{ - struct adnp *adnp = to_adnp(chip); - return irq_create_mapping(adnp->domain, offset); -} - -static void adnp_irq_mask(struct irq_data *data) +static void adnp_irq_mask(struct irq_data *d) { - struct adnp *adnp = irq_data_get_irq_chip_data(data); - unsigned int reg = data->hwirq >> adnp->reg_shift; - unsigned int pos = data->hwirq & 7; + struct gpio_chip *gc = irq_data_get_irq_chip_data(d); + struct adnp *adnp = to_adnp(gc); + unsigned int reg = d->hwirq >> adnp->reg_shift; + unsigned int pos = d->hwirq & 7; adnp->irq_enable[reg] &= ~BIT(pos); } -static void adnp_irq_unmask(struct irq_data *data) +static void adnp_irq_unmask(struct irq_data *d) { - struct adnp *adnp = irq_data_get_irq_chip_data(data); - unsigned int reg = data->hwirq >> adnp->reg_shift; - unsigned int pos = data->hwirq & 7; + struct gpio_chip *gc = irq_data_get_irq_chip_data(d); + struct adnp *adnp = to_adnp(gc); + unsigned int reg = d->hwirq >> adnp->reg_shift; + unsigned int pos = d->hwirq & 7; adnp->irq_enable[reg] |= BIT(pos); } -static int adnp_irq_set_type(struct irq_data *data, unsigned int type) +static int adnp_irq_set_type(struct irq_data *d, unsigned int type) { - struct adnp *adnp = irq_data_get_irq_chip_data(data); - unsigned int reg = data->hwirq >> adnp->reg_shift; - unsigned int pos = data->hwirq & 7; + struct gpio_chip *gc = irq_data_get_irq_chip_data(d); + struct adnp *adnp = to_adnp(gc); + unsigned int reg = d->hwirq >> adnp->reg_shift; + unsigned int pos = d->hwirq & 7; if (type & IRQ_TYPE_EDGE_RISING) adnp->irq_rise[reg] |= BIT(pos); @@ -387,16 +387,18 @@ static int adnp_irq_set_type(struct irq_data *data, unsigned int type) return 0; } -static void adnp_irq_bus_lock(struct irq_data *data) +static void adnp_irq_bus_lock(struct irq_data *d) { - struct adnp *adnp = irq_data_get_irq_chip_data(data); + struct gpio_chip *gc = irq_data_get_irq_chip_data(d); + struct adnp *adnp = to_adnp(gc); mutex_lock(&adnp->irq_lock); } -static void adnp_irq_bus_unlock(struct irq_data *data) +static void adnp_irq_bus_unlock(struct irq_data *d) { - struct adnp *adnp = irq_data_get_irq_chip_data(data); + struct gpio_chip *gc = irq_data_get_irq_chip_data(d); + struct adnp *adnp = to_adnp(gc); unsigned int num_regs = 1 << adnp->reg_shift, i; mutex_lock(&adnp->i2c_lock); @@ -408,26 +410,6 @@ static void adnp_irq_bus_unlock(struct irq_data *data) mutex_unlock(&adnp->irq_lock); } -static int adnp_irq_reqres(struct irq_data *data) -{ - struct adnp *adnp = irq_data_get_irq_chip_data(data); - - if (gpio_lock_as_irq(&adnp->gpio, data->hwirq)) { - dev_err(adnp->gpio.dev, - "unable to lock HW IRQ %lu for IRQ\n", - data->hwirq); - return -EINVAL; - } - return 0; -} - -static void adnp_irq_relres(struct irq_data *data) -{ - struct adnp *adnp = irq_data_get_irq_chip_data(data); - - gpio_unlock_as_irq(&adnp->gpio, data->hwirq); -} - static struct irq_chip adnp_irq_chip = { .name = "gpio-adnp", .irq_mask = adnp_irq_mask, @@ -435,29 +417,6 @@ static struct irq_chip adnp_irq_chip = { .irq_set_type = adnp_irq_set_type, .irq_bus_lock = adnp_irq_bus_lock, .irq_bus_sync_unlock = adnp_irq_bus_unlock, - .irq_request_resources = adnp_irq_reqres, - .irq_release_resources = adnp_irq_relres, -}; - -static int adnp_irq_map(struct irq_domain *domain, unsigned int irq, - irq_hw_number_t hwirq) -{ - irq_set_chip_data(irq, domain->host_data); - irq_set_chip(irq, &adnp_irq_chip); - irq_set_nested_thread(irq, true); - -#ifdef CONFIG_ARM - set_irq_flags(irq, IRQF_VALID); -#else - irq_set_noprobe(irq); -#endif - - return 0; -} - -static const struct irq_domain_ops adnp_irq_domain_ops = { - .map = adnp_irq_map, - .xlate = irq_domain_xlate_twocell, }; static int adnp_irq_setup(struct adnp *adnp) @@ -503,35 +462,28 @@ static int adnp_irq_setup(struct adnp *adnp) adnp->irq_enable[i] = 0x00; } - adnp->domain = irq_domain_add_linear(chip->of_node, chip->ngpio, - &adnp_irq_domain_ops, adnp); - - err = request_threaded_irq(adnp->client->irq, NULL, adnp_irq, - IRQF_TRIGGER_RISING | IRQF_ONESHOT, - dev_name(chip->dev), adnp); + err = devm_request_threaded_irq(chip->dev, adnp->client->irq, + NULL, adnp_irq, + IRQF_TRIGGER_RISING | IRQF_ONESHOT, + dev_name(chip->dev), adnp); if (err != 0) { dev_err(chip->dev, "can't request IRQ#%d: %d\n", adnp->client->irq, err); return err; } - chip->to_irq = adnp_gpio_to_irq; - return 0; -} - -static void adnp_irq_teardown(struct adnp *adnp) -{ - unsigned int irq, i; - - free_irq(adnp->client->irq, adnp); - - for (i = 0; i < adnp->gpio.ngpio; i++) { - irq = irq_find_mapping(adnp->domain, i); - if (irq > 0) - irq_dispose_mapping(irq); + err = gpiochip_irqchip_add(chip, + &adnp_irq_chip, + 0, + handle_simple_irq, + IRQ_TYPE_NONE); + if (err) { + dev_err(chip->dev, + "could not connect irqchip to gpiochip\n"); + return err; } - irq_domain_remove(adnp->domain); + return 0; } static int adnp_i2c_probe(struct i2c_client *client, @@ -558,38 +510,25 @@ static int adnp_i2c_probe(struct i2c_client *client, adnp->client = client; err = adnp_gpio_setup(adnp, num_gpios); - if (err < 0) + if (err) return err; if (of_find_property(np, "interrupt-controller", NULL)) { err = adnp_irq_setup(adnp); - if (err < 0) - goto teardown; + if (err) + return err; } - err = gpiochip_add(&adnp->gpio); - if (err < 0) - goto teardown; - i2c_set_clientdata(client, adnp); - return 0; -teardown: - if (of_find_property(np, "interrupt-controller", NULL)) - adnp_irq_teardown(adnp); - - return err; + return 0; } static int adnp_i2c_remove(struct i2c_client *client) { struct adnp *adnp = i2c_get_clientdata(client); - struct device_node *np = client->dev.of_node; gpiochip_remove(&adnp->gpio); - if (of_find_property(np, "interrupt-controller", NULL)) - adnp_irq_teardown(adnp); - return 0; } -- cgit From 016da14439b83fbb82c67c497eb770c8025608fe Mon Sep 17 00:00:00 2001 From: Lars-Peter Clausen Date: Mon, 18 Aug 2014 11:54:56 +0200 Subject: gpio: zynq: Take bank offset into account when reporting a IRQ When looking up the IRQ the bank offset needs to be taken into account. Otherwise interrupts for banks other than bank 0 get incorrectly reported as interrupts for bank 0. Signed-off-by: Lars-Peter Clausen Signed-off-by: Michal Simek Signed-off-by: Linus Walleij --- drivers/gpio/gpio-zynq.c | 10 +++++++++- 1 file changed, 9 insertions(+), 1 deletion(-) (limited to 'drivers') diff --git a/drivers/gpio/gpio-zynq.c b/drivers/gpio/gpio-zynq.c index 36034b6811bb..dccadea9d830 100644 --- a/drivers/gpio/gpio-zynq.c +++ b/drivers/gpio/gpio-zynq.c @@ -138,6 +138,13 @@ static inline void zynq_gpio_get_bank_pin(unsigned int pin_num, } } +static const unsigned int zynq_gpio_bank_offset[] = { + ZYNQ_GPIO_BANK0_PIN_MIN, + ZYNQ_GPIO_BANK1_PIN_MIN, + ZYNQ_GPIO_BANK2_PIN_MIN, + ZYNQ_GPIO_BANK3_PIN_MIN, +}; + /** * zynq_gpio_get_value - Get the state of the specified pin of GPIO device * @chip: gpio_chip instance to be worked on @@ -461,6 +468,7 @@ static void zynq_gpio_handle_bank_irq(struct zynq_gpio *gpio, unsigned int bank_num, unsigned long pending) { + unsigned int bank_offset = zynq_gpio_bank_offset[bank_num]; struct irq_domain *irqdomain = gpio->chip.irqdomain; int offset; @@ -470,7 +478,7 @@ static void zynq_gpio_handle_bank_irq(struct zynq_gpio *gpio, for_each_set_bit(offset, &pending, 32) { unsigned int gpio_irq; - gpio_irq = irq_find_mapping(irqdomain, offset); + gpio_irq = irq_find_mapping(irqdomain, offset + bank_offset); generic_handle_irq(gpio_irq); } } -- cgit From a19467788170c55104082ba82c8d50f54b9d6106 Mon Sep 17 00:00:00 2001 From: Ezra Savard Date: Fri, 29 Aug 2014 10:58:45 -0700 Subject: gpio: zynq: Mask non-wakeup GPIO interrupts on suspend Added flag to the GPIO chip so that IRQ from non-wakeup GPIO will not wake the system. Signed-off-by: Ezra Savard Reviewed-by: Soren Brinkmann Signed-off-by: Linus Walleij --- drivers/gpio/gpio-zynq.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) (limited to 'drivers') diff --git a/drivers/gpio/gpio-zynq.c b/drivers/gpio/gpio-zynq.c index dccadea9d830..d80d722529ad 100644 --- a/drivers/gpio/gpio-zynq.c +++ b/drivers/gpio/gpio-zynq.c @@ -451,7 +451,8 @@ static struct irq_chip zynq_gpio_level_irqchip = { .irq_unmask = zynq_gpio_irq_unmask, .irq_set_type = zynq_gpio_set_irq_type, .irq_set_wake = zynq_gpio_set_wake, - .flags = IRQCHIP_EOI_THREADED | IRQCHIP_EOI_IF_HANDLED, + .flags = IRQCHIP_EOI_THREADED | IRQCHIP_EOI_IF_HANDLED | + IRQCHIP_MASK_ON_SUSPEND, }; static struct irq_chip zynq_gpio_edge_irqchip = { @@ -462,6 +463,7 @@ static struct irq_chip zynq_gpio_edge_irqchip = { .irq_unmask = zynq_gpio_irq_unmask, .irq_set_type = zynq_gpio_set_irq_type, .irq_set_wake = zynq_gpio_set_wake, + .flags = IRQCHIP_MASK_ON_SUSPEND, }; static void zynq_gpio_handle_bank_irq(struct zynq_gpio *gpio, -- cgit From 59e22114b253aaa7caf14221df4dcf924d067922 Mon Sep 17 00:00:00 2001 From: Ezra Savard Date: Fri, 29 Aug 2014 10:58:46 -0700 Subject: gpio: zynq: Fixed broken wakeup implementation Use of unmask/mask in set_wake was an incorrect implementation. The new implementation correctly sets wakeup for the gpio chip's IRQ so the gpio chip will not sleep while wakeup-enabled gpio are in use. Signed-off-by: Ezra Savard Reviewed-by: Soren Brinkmann Signed-off-by: Linus Walleij --- drivers/gpio/gpio-zynq.c | 34 ++++++++++++++++++++-------------- 1 file changed, 20 insertions(+), 14 deletions(-) (limited to 'drivers') diff --git a/drivers/gpio/gpio-zynq.c b/drivers/gpio/gpio-zynq.c index d80d722529ad..1e6f19a07454 100644 --- a/drivers/gpio/gpio-zynq.c +++ b/drivers/gpio/gpio-zynq.c @@ -88,16 +88,17 @@ * @chip: instance of the gpio_chip * @base_addr: base address of the GPIO device * @clk: clock resource for this controller + * @irq: interrupt for the GPIO device */ struct zynq_gpio { struct gpio_chip chip; void __iomem *base_addr; struct clk *clk; + int irq; }; static struct irq_chip zynq_gpio_level_irqchip; static struct irq_chip zynq_gpio_edge_irqchip; - /** * zynq_gpio_get_bank_pin - Get the bank number and pin number within that bank * for a given pin in the GPIO device @@ -434,10 +435,9 @@ static int zynq_gpio_set_irq_type(struct irq_data *irq_data, unsigned int type) static int zynq_gpio_set_wake(struct irq_data *data, unsigned int on) { - if (on) - zynq_gpio_irq_unmask(data); - else - zynq_gpio_irq_mask(data); + struct zynq_gpio *gpio = irq_data_get_irq_chip_data(data); + + irq_set_irq_wake(gpio->irq, on); return 0; } @@ -518,7 +518,11 @@ static void zynq_gpio_irqhandler(unsigned int irq, struct irq_desc *desc) static int __maybe_unused zynq_gpio_suspend(struct device *dev) { - if (!device_may_wakeup(dev)) + struct platform_device *pdev = to_platform_device(dev); + int irq = platform_get_irq(pdev, 0); + struct irq_data *data = irq_get_irq_data(irq); + + if (!irqd_is_wakeup_set(data)) return pm_runtime_force_suspend(dev); return 0; @@ -526,7 +530,11 @@ static int __maybe_unused zynq_gpio_suspend(struct device *dev) static int __maybe_unused zynq_gpio_resume(struct device *dev) { - if (!device_may_wakeup(dev)) + struct platform_device *pdev = to_platform_device(dev); + int irq = platform_get_irq(pdev, 0); + struct irq_data *data = irq_get_irq_data(irq); + + if (!irqd_is_wakeup_set(data)) return pm_runtime_force_resume(dev); return 0; @@ -587,7 +595,7 @@ static const struct dev_pm_ops zynq_gpio_dev_pm_ops = { */ static int zynq_gpio_probe(struct platform_device *pdev) { - int ret, bank_num, irq; + int ret, bank_num; struct zynq_gpio *gpio; struct gpio_chip *chip; struct resource *res; @@ -603,10 +611,10 @@ static int zynq_gpio_probe(struct platform_device *pdev) if (IS_ERR(gpio->base_addr)) return PTR_ERR(gpio->base_addr); - irq = platform_get_irq(pdev, 0); - if (irq < 0) { + gpio->irq = platform_get_irq(pdev, 0); + if (gpio->irq < 0) { dev_err(&pdev->dev, "invalid IRQ\n"); - return irq; + return gpio->irq; } /* configure the gpio chip */ @@ -654,14 +662,12 @@ static int zynq_gpio_probe(struct platform_device *pdev) goto err_rm_gpiochip; } - gpiochip_set_chained_irqchip(chip, &zynq_gpio_edge_irqchip, irq, + gpiochip_set_chained_irqchip(chip, &zynq_gpio_edge_irqchip, gpio->irq, zynq_gpio_irqhandler); pm_runtime_set_active(&pdev->dev); pm_runtime_enable(&pdev->dev); - device_set_wakeup_capable(&pdev->dev, 1); - return 0; err_rm_gpiochip: -- cgit From 3af0dbd592fe0a92002f16e341519ba03e92adf7 Mon Sep 17 00:00:00 2001 From: Sonic Zhang Date: Mon, 1 Sep 2014 11:19:52 +0800 Subject: gpio: mcp23s08 to support both device tree and platform data Device tree is not enabled in some architecture where gpio driver mcp23s08 is still required. v2-changes: - Parse device tree properties into platform data other than individual variables. v3-changes: - Use of_node in gpio_chip device structure, because the struct device * always has an of_node which is NULL when OF is not used. Signed-off-by: Sonic Zhang Reviewed-by: Alexandre Courbot Signed-off-by: Linus Walleij --- drivers/gpio/Kconfig | 1 - drivers/gpio/gpio-mcp23s08.c | 64 +++++++++++++++++++++++--------------------- 2 files changed, 34 insertions(+), 31 deletions(-) (limited to 'drivers') diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig index ec27ec0be8c2..ec398bee7c60 100644 --- a/drivers/gpio/Kconfig +++ b/drivers/gpio/Kconfig @@ -806,7 +806,6 @@ config GPIO_MAX7301 config GPIO_MCP23S08 tristate "Microchip MCP23xxx I/O expander" - depends on OF_GPIO depends on (SPI_MASTER && !I2C) || I2C help SPI/I2C driver for Microchip MCP23S08/MCP23S17/MCP23008/MCP23017 diff --git a/drivers/gpio/gpio-mcp23s08.c b/drivers/gpio/gpio-mcp23s08.c index 6f183d9b487e..8488e2fd307c 100644 --- a/drivers/gpio/gpio-mcp23s08.c +++ b/drivers/gpio/gpio-mcp23s08.c @@ -479,7 +479,7 @@ static int mcp23s08_irq_setup(struct mcp23s08 *mcp) mutex_init(&mcp->irq_lock); - mcp->irq_domain = irq_domain_add_linear(chip->of_node, chip->ngpio, + mcp->irq_domain = irq_domain_add_linear(chip->dev->of_node, chip->ngpio, &irq_domain_simple_ops, mcp); if (!mcp->irq_domain) return -ENODEV; @@ -581,7 +581,7 @@ done: static int mcp23s08_probe_one(struct mcp23s08 *mcp, struct device *dev, void *data, unsigned addr, unsigned type, - unsigned base, unsigned pullups) + struct mcp23s08_platform_data *pdata, int cs) { int status; bool mirror = false; @@ -635,7 +635,7 @@ static int mcp23s08_probe_one(struct mcp23s08 *mcp, struct device *dev, return -EINVAL; } - mcp->chip.base = base; + mcp->chip.base = pdata->base; mcp->chip.can_sleep = true; mcp->chip.dev = dev; mcp->chip.owner = THIS_MODULE; @@ -648,11 +648,9 @@ static int mcp23s08_probe_one(struct mcp23s08 *mcp, struct device *dev, if (status < 0) goto fail; - mcp->irq_controller = of_property_read_bool(mcp->chip.of_node, - "interrupt-controller"); + mcp->irq_controller = pdata->irq_controller; if (mcp->irq && mcp->irq_controller && (type == MCP_TYPE_017)) - mirror = of_property_read_bool(mcp->chip.of_node, - "microchip,irq-mirror"); + mirror = pdata->mirror; if ((status & IOCON_SEQOP) || !(status & IOCON_HAEN) || mirror) { /* mcp23s17 has IOCON twice, make sure they are in sync */ @@ -668,7 +666,7 @@ static int mcp23s08_probe_one(struct mcp23s08 *mcp, struct device *dev, } /* configure ~100K pullups */ - status = mcp->ops->write(mcp, MCP_GPPU, pullups); + status = mcp->ops->write(mcp, MCP_GPPU, pdata->chip[cs].pullups); if (status < 0) goto fail; @@ -768,25 +766,29 @@ MODULE_DEVICE_TABLE(of, mcp23s08_i2c_of_match); static int mcp230xx_probe(struct i2c_client *client, const struct i2c_device_id *id) { - struct mcp23s08_platform_data *pdata; + struct mcp23s08_platform_data *pdata, local_pdata; struct mcp23s08 *mcp; - int status, base, pullups; + int status; const struct of_device_id *match; match = of_match_device(of_match_ptr(mcp23s08_i2c_of_match), &client->dev); - pdata = dev_get_platdata(&client->dev); - if (match || !pdata) { - base = -1; - pullups = 0; + if (match) { + pdata = &local_pdata; + pdata->base = -1; + pdata->chip[0].pullups = 0; + pdata->irq_controller = of_property_read_bool( + client->dev.of_node, + "interrupt-controller"); + pdata->mirror = of_property_read_bool(client->dev.of_node, + "microchip,irq-mirror"); client->irq = irq_of_parse_and_map(client->dev.of_node, 0); } else { - if (!gpio_is_valid(pdata->base)) { + pdata = dev_get_platdata(&client->dev); + if (!pdata || !gpio_is_valid(pdata->base)) { dev_dbg(&client->dev, "invalid platform data\n"); return -EINVAL; } - base = pdata->base; - pullups = pdata->chip[0].pullups; } mcp = kzalloc(sizeof(*mcp), GFP_KERNEL); @@ -795,7 +797,7 @@ static int mcp230xx_probe(struct i2c_client *client, mcp->irq = client->irq; status = mcp23s08_probe_one(mcp, &client->dev, client, client->addr, - id->driver_data, base, pullups); + id->driver_data, pdata, 0); if (status) goto fail; @@ -863,14 +865,12 @@ static void mcp23s08_i2c_exit(void) { } static int mcp23s08_probe(struct spi_device *spi) { - struct mcp23s08_platform_data *pdata; + struct mcp23s08_platform_data *pdata, local_pdata; unsigned addr; int chips = 0; struct mcp23s08_driver_data *data; int status, type; - unsigned base = -1, - ngpio = 0, - pullups[ARRAY_SIZE(pdata->chip)]; + unsigned ngpio = 0; const struct of_device_id *match; u32 spi_present_mask = 0; @@ -893,11 +893,18 @@ static int mcp23s08_probe(struct spi_device *spi) return -ENODEV; } + pdata = &local_pdata; + pdata->base = -1; for (addr = 0; addr < ARRAY_SIZE(pdata->chip); addr++) { - pullups[addr] = 0; + pdata->chip[addr].pullups = 0; if (spi_present_mask & (1 << addr)) chips++; } + pdata->irq_controller = of_property_read_bool( + spi->dev.of_node, + "interrupt-controller"); + pdata->mirror = of_property_read_bool(spi->dev.of_node, + "microchip,irq-mirror"); } else { type = spi_get_device_id(spi)->driver_data; pdata = dev_get_platdata(&spi->dev); @@ -917,10 +924,7 @@ static int mcp23s08_probe(struct spi_device *spi) return -EINVAL; } spi_present_mask |= 1 << addr; - pullups[addr] = pdata->chip[addr].pullups; } - - base = pdata->base; } if (!chips) @@ -938,13 +942,13 @@ static int mcp23s08_probe(struct spi_device *spi) chips--; data->mcp[addr] = &data->chip[chips]; status = mcp23s08_probe_one(data->mcp[addr], &spi->dev, spi, - 0x40 | (addr << 1), type, base, - pullups[addr]); + 0x40 | (addr << 1), type, pdata, + addr); if (status < 0) goto fail; - if (base != -1) - base += (type == MCP_TYPE_S17) ? 16 : 8; + if (pdata->base != -1) + pdata->base += (type == MCP_TYPE_S17) ? 16 : 8; ngpio += (type == MCP_TYPE_S17) ? 16 : 8; } data->ngpio = ngpio; -- cgit From 2c341d62eb4b697793c29da51fda64328df5ff59 Mon Sep 17 00:00:00 2001 From: Grygorii Strashko Date: Wed, 3 Sep 2014 20:05:32 +0300 Subject: gpio: syscon: add soc specific callback to assign output value Some SoCs (like Keystone) may require to perform special sequence of operations to assign output GPIO value, so default implementation of .set() callback from gpio-syscon driver can't be used. Hence, add optional, SoC specific callback to assign output gpio value. Signed-off-by: Grygorii Strashko Signed-off-by: Linus Walleij --- drivers/gpio/gpio-syscon.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) (limited to 'drivers') diff --git a/drivers/gpio/gpio-syscon.c b/drivers/gpio/gpio-syscon.c index 30884fbc750d..d50ff9363c81 100644 --- a/drivers/gpio/gpio-syscon.c +++ b/drivers/gpio/gpio-syscon.c @@ -37,6 +37,8 @@ * dat_bit_offset: Offset (in bits) to the first GPIO bit. * dir_bit_offset: Optional offset (in bits) to the first bit to switch * GPIO direction (Used with GPIO_SYSCON_FEAT_DIR flag). + * set: HW specific callback to assigns output value + * for signal "offset" */ struct syscon_gpio_data { @@ -45,6 +47,8 @@ struct syscon_gpio_data { unsigned int bit_count; unsigned int dat_bit_offset; unsigned int dir_bit_offset; + void (*set)(struct gpio_chip *chip, + unsigned offset, int value); }; struct syscon_gpio_priv { @@ -111,7 +115,7 @@ static int syscon_gpio_dir_out(struct gpio_chip *chip, unsigned offset, int val) BIT(offs % SYSCON_REG_BITS)); } - syscon_gpio_set(chip, offset, val); + priv->data->set(chip, offset, val); return 0; } @@ -159,7 +163,7 @@ static int syscon_gpio_probe(struct platform_device *pdev) if (priv->data->flags & GPIO_SYSCON_FEAT_IN) priv->chip.direction_input = syscon_gpio_dir_in; if (priv->data->flags & GPIO_SYSCON_FEAT_OUT) { - priv->chip.set = syscon_gpio_set; + priv->chip.set = priv->data->set ? : syscon_gpio_set; priv->chip.direction_output = syscon_gpio_dir_out; } -- cgit From 5a3e3f88b0a10f8b5baf224ebda5916195fb8745 Mon Sep 17 00:00:00 2001 From: Grygorii Strashko Date: Wed, 3 Sep 2014 20:05:33 +0300 Subject: gpio: syscon: retrive syscon node and regs offsets from dt This patch adds handling of new "gpio,syscon-dev" DT property, which allows to specify syscon node and data/direction registers offsets in DT. "gpio,syscon-dev" has following format: gpio,syscon-dev = <&syscon_dev data_reg_offset [direction_reg_offset]>; where - syscon_dev - phandle on syscon node - data_reg_offset - offset of data register (in bytes) - direction_reg_offset - offset of dirrection register (optional, in bytes) for example: gpio,syscon-dev = <&devctrl 0x254>; In such way, the support of multiple Syscon GPIO devices is added. Signed-off-by: Grygorii Strashko Signed-off-by: Linus Walleij --- drivers/gpio/gpio-syscon.c | 51 ++++++++++++++++++++++++++++++++++++++-------- 1 file changed, 43 insertions(+), 8 deletions(-) (limited to 'drivers') diff --git a/drivers/gpio/gpio-syscon.c b/drivers/gpio/gpio-syscon.c index d50ff9363c81..049391bf80ee 100644 --- a/drivers/gpio/gpio-syscon.c +++ b/drivers/gpio/gpio-syscon.c @@ -55,6 +55,8 @@ struct syscon_gpio_priv { struct gpio_chip chip; struct regmap *syscon; const struct syscon_gpio_data *data; + u32 dreg_offset; + u32 dir_reg_offset; }; static inline struct syscon_gpio_priv *to_syscon_gpio(struct gpio_chip *chip) @@ -65,9 +67,11 @@ static inline struct syscon_gpio_priv *to_syscon_gpio(struct gpio_chip *chip) static int syscon_gpio_get(struct gpio_chip *chip, unsigned offset) { struct syscon_gpio_priv *priv = to_syscon_gpio(chip); - unsigned int val, offs = priv->data->dat_bit_offset + offset; + unsigned int val, offs; int ret; + offs = priv->dreg_offset + priv->data->dat_bit_offset + offset; + ret = regmap_read(priv->syscon, (offs / SYSCON_REG_BITS) * SYSCON_REG_SIZE, &val); if (ret) @@ -79,7 +83,9 @@ static int syscon_gpio_get(struct gpio_chip *chip, unsigned offset) static void syscon_gpio_set(struct gpio_chip *chip, unsigned offset, int val) { struct syscon_gpio_priv *priv = to_syscon_gpio(chip); - unsigned int offs = priv->data->dat_bit_offset + offset; + unsigned int offs; + + offs = priv->dreg_offset + priv->data->dat_bit_offset + offset; regmap_update_bits(priv->syscon, (offs / SYSCON_REG_BITS) * SYSCON_REG_SIZE, @@ -92,7 +98,10 @@ static int syscon_gpio_dir_in(struct gpio_chip *chip, unsigned offset) struct syscon_gpio_priv *priv = to_syscon_gpio(chip); if (priv->data->flags & GPIO_SYSCON_FEAT_DIR) { - unsigned int offs = priv->data->dir_bit_offset + offset; + unsigned int offs; + + offs = priv->dir_reg_offset + + priv->data->dir_bit_offset + offset; regmap_update_bits(priv->syscon, (offs / SYSCON_REG_BITS) * SYSCON_REG_SIZE, @@ -107,7 +116,10 @@ static int syscon_gpio_dir_out(struct gpio_chip *chip, unsigned offset, int val) struct syscon_gpio_priv *priv = to_syscon_gpio(chip); if (priv->data->flags & GPIO_SYSCON_FEAT_DIR) { - unsigned int offs = priv->data->dir_bit_offset + offset; + unsigned int offs; + + offs = priv->dir_reg_offset + + priv->data->dir_bit_offset + offset; regmap_update_bits(priv->syscon, (offs / SYSCON_REG_BITS) * SYSCON_REG_SIZE, @@ -142,6 +154,8 @@ static int syscon_gpio_probe(struct platform_device *pdev) struct device *dev = &pdev->dev; const struct of_device_id *of_id = of_match_device(syscon_gpio_ids, dev); struct syscon_gpio_priv *priv; + struct device_node *np = dev->of_node; + int ret; priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); if (!priv) @@ -149,10 +163,31 @@ static int syscon_gpio_probe(struct platform_device *pdev) priv->data = of_id->data; - priv->syscon = - syscon_regmap_lookup_by_compatible(priv->data->compatible); - if (IS_ERR(priv->syscon)) - return PTR_ERR(priv->syscon); + if (priv->data->compatible) { + priv->syscon = syscon_regmap_lookup_by_compatible( + priv->data->compatible); + if (IS_ERR(priv->syscon)) + return PTR_ERR(priv->syscon); + } else { + priv->syscon = + syscon_regmap_lookup_by_phandle(np, "gpio,syscon-dev"); + if (IS_ERR(priv->syscon)) + return PTR_ERR(priv->syscon); + + ret = of_property_read_u32_index(np, "gpio,syscon-dev", 1, + &priv->dreg_offset); + if (ret) + dev_err(dev, "can't read the data register offset!\n"); + + priv->dreg_offset <<= 3; + + ret = of_property_read_u32_index(np, "gpio,syscon-dev", 2, + &priv->dir_reg_offset); + if (ret) + dev_err(dev, "can't read the dir register offset!\n"); + + priv->dir_reg_offset <<= 3; + } priv->chip.dev = dev; priv->chip.owner = THIS_MODULE; -- cgit From 2134cb997f2f1b2d960ad8705d67dc8d690ba59c Mon Sep 17 00:00:00 2001 From: Grygorii Strashko Date: Wed, 3 Sep 2014 20:05:34 +0300 Subject: gpio: syscon: reuse for keystone 2 socs On Keystone SOCs, ARM host can send interrupts to DSP cores using the DSP GPIO controller IP. Each DSP GPIO controller provides 28 IRQ signals for each DSP core. This is one of the component used by the IPC mechanism used on Keystone SOCs. Keystone 2 DSP GPIO controller has specific features: - each GPIO can be configured only as output pin; - setting GPIO value to 1 causes IRQ generation on target DSP core; - reading pin value returns 0 - if IRQ was handled or 1 - IRQ is still pending. This patch updates gpio-syscon driver to be reused by Keystone 2 SoCs, because the Keystone 2 DSP GPIO controller is controlled through Syscon devices and, as requested by Linus Walleij, such kind of GPIO controllers should be integrated with drivers/gpio/gpio-syscon.c driver. Signed-off-by: Grygorii Strashko Signed-off-by: Linus Walleij --- drivers/gpio/gpio-syscon.c | 35 +++++++++++++++++++++++++++++++++++ 1 file changed, 35 insertions(+) (limited to 'drivers') diff --git a/drivers/gpio/gpio-syscon.c b/drivers/gpio/gpio-syscon.c index 049391bf80ee..e82fde4b6898 100644 --- a/drivers/gpio/gpio-syscon.c +++ b/drivers/gpio/gpio-syscon.c @@ -140,11 +140,46 @@ static const struct syscon_gpio_data clps711x_mctrl_gpio = { .dat_bit_offset = 0x40 * 8 + 8, }; +#define KEYSTONE_LOCK_BIT BIT(0) + +static void keystone_gpio_set(struct gpio_chip *chip, unsigned offset, int val) +{ + struct syscon_gpio_priv *priv = to_syscon_gpio(chip); + unsigned int offs; + int ret; + + offs = priv->dreg_offset + priv->data->dat_bit_offset + offset; + + if (!val) + return; + + ret = regmap_update_bits( + priv->syscon, + (offs / SYSCON_REG_BITS) * SYSCON_REG_SIZE, + BIT(offs % SYSCON_REG_BITS) | KEYSTONE_LOCK_BIT, + BIT(offs % SYSCON_REG_BITS) | KEYSTONE_LOCK_BIT); + if (ret < 0) + dev_err(chip->dev, "gpio write failed ret(%d)\n", ret); +} + +static const struct syscon_gpio_data keystone_dsp_gpio = { + /* ARM Keystone 2 */ + .compatible = NULL, + .flags = GPIO_SYSCON_FEAT_OUT, + .bit_count = 28, + .dat_bit_offset = 4, + .set = keystone_gpio_set, +}; + static const struct of_device_id syscon_gpio_ids[] = { { .compatible = "cirrus,clps711x-mctrl-gpio", .data = &clps711x_mctrl_gpio, }, + { + .compatible = "ti,keystone-dsp-gpio", + .data = &keystone_dsp_gpio, + }, { } }; MODULE_DEVICE_TABLE(of, syscon_gpio_ids); -- cgit From 88d5e520aa9701eb3e4f46165e02097cc03d363a Mon Sep 17 00:00:00 2001 From: abdoulaye berthe Date: Sat, 12 Jul 2014 22:30:14 +0200 Subject: driver:gpio remove all usage of gpio_remove retval in driver MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit this remove all reference to gpio_remove retval in all driver except pinctrl and gpio. the same thing is done for gpio and pinctrl in two different patches. Signed-off-by: Abdoulaye Berthe Acked-by: Michael Büsch Acked-by: Dmitry Torokhov Acked-by: Mauro Carvalho Chehab Acked-by: Tomi Valkeinen Signed-off-by: Linus Walleij --- drivers/bcma/driver_gpio.c | 3 ++- drivers/gpio/gpio-zynq.c | 3 +-- drivers/hid/hid-cp2112.c | 6 ++---- drivers/input/keyboard/adp5588-keys.c | 4 +--- drivers/input/keyboard/adp5589-keys.c | 4 +--- drivers/input/touchscreen/ad7879.c | 10 +++------- drivers/leds/leds-pca9532.c | 10 ++-------- drivers/leds/leds-tca6507.c | 7 ++----- drivers/media/dvb-frontends/cxd2820r_core.c | 10 +++------- drivers/mfd/asic3.c | 3 ++- drivers/mfd/htc-i2cpld.c | 8 +------- drivers/mfd/sm501.c | 17 +++-------------- drivers/mfd/tc6393xb.c | 13 ++++--------- drivers/mfd/ucb1x00-core.c | 8 ++------ drivers/platform/x86/intel_pmic_gpio.c | 3 +-- drivers/ssb/driver_gpio.c | 3 ++- drivers/staging/vme/devices/vme_pio2_gpio.c | 4 +--- drivers/tty/serial/max310x.c | 10 ++++------ drivers/video/fbdev/via/via-gpio.c | 10 +++------- 19 files changed, 40 insertions(+), 96 deletions(-) (limited to 'drivers') diff --git a/drivers/bcma/driver_gpio.c b/drivers/bcma/driver_gpio.c index aec9f850b4a8..710fa62dd5ae 100644 --- a/drivers/bcma/driver_gpio.c +++ b/drivers/bcma/driver_gpio.c @@ -251,5 +251,6 @@ int bcma_gpio_init(struct bcma_drv_cc *cc) int bcma_gpio_unregister(struct bcma_drv_cc *cc) { bcma_gpio_irq_domain_exit(cc); - return gpiochip_remove(&cc->gpio); + gpiochip_remove(&cc->gpio); + return 0; } diff --git a/drivers/gpio/gpio-zynq.c b/drivers/gpio/gpio-zynq.c index 1e6f19a07454..5dfbced24815 100644 --- a/drivers/gpio/gpio-zynq.c +++ b/drivers/gpio/gpio-zynq.c @@ -671,8 +671,7 @@ static int zynq_gpio_probe(struct platform_device *pdev) return 0; err_rm_gpiochip: - if (gpiochip_remove(chip)) - dev_err(&pdev->dev, "Failed to remove gpio chip\n"); + gpiochip_remove(chip); err_disable_clk: clk_disable_unprepare(gpio->clk); diff --git a/drivers/hid/hid-cp2112.c b/drivers/hid/hid-cp2112.c index a822db5a8338..3318de690e00 100644 --- a/drivers/hid/hid-cp2112.c +++ b/drivers/hid/hid-cp2112.c @@ -1069,8 +1069,7 @@ static int cp2112_probe(struct hid_device *hdev, const struct hid_device_id *id) return ret; err_gpiochip_remove: - if (gpiochip_remove(&dev->gc) < 0) - hid_err(hdev, "error removing gpio chip\n"); + gpiochip_remove(&dev->gc); err_free_i2c: i2c_del_adapter(&dev->adap); err_free_dev: @@ -1089,8 +1088,7 @@ static void cp2112_remove(struct hid_device *hdev) struct cp2112_device *dev = hid_get_drvdata(hdev); sysfs_remove_group(&hdev->dev.kobj, &cp2112_attr_group); - if (gpiochip_remove(&dev->gc)) - hid_err(hdev, "unable to remove gpio chip\n"); + gpiochip_remove(&dev->gc); i2c_del_adapter(&dev->adap); /* i2c_del_adapter has finished removing all i2c devices from our * adapter. Well behaved devices should no longer call our cp2112_xfer diff --git a/drivers/input/keyboard/adp5588-keys.c b/drivers/input/keyboard/adp5588-keys.c index 5ef7fcf0e250..b97ed443e0a4 100644 --- a/drivers/input/keyboard/adp5588-keys.c +++ b/drivers/input/keyboard/adp5588-keys.c @@ -251,9 +251,7 @@ static void adp5588_gpio_remove(struct adp5588_kpad *kpad) dev_warn(dev, "teardown failed %d\n", error); } - error = gpiochip_remove(&kpad->gc); - if (error) - dev_warn(dev, "gpiochip_remove failed %d\n", error); + gpiochip_remove(&kpad->gc); } #else static inline int adp5588_gpio_add(struct adp5588_kpad *kpad) diff --git a/drivers/input/keyboard/adp5589-keys.c b/drivers/input/keyboard/adp5589-keys.c index 6329549bf6ad..a45267729dfc 100644 --- a/drivers/input/keyboard/adp5589-keys.c +++ b/drivers/input/keyboard/adp5589-keys.c @@ -567,9 +567,7 @@ static void adp5589_gpio_remove(struct adp5589_kpad *kpad) dev_warn(dev, "teardown failed %d\n", error); } - error = gpiochip_remove(&kpad->gc); - if (error) - dev_warn(dev, "gpiochip_remove failed %d\n", error); + gpiochip_remove(&kpad->gc); } #else static inline int adp5589_gpio_add(struct adp5589_kpad *kpad) diff --git a/drivers/input/touchscreen/ad7879.c b/drivers/input/touchscreen/ad7879.c index fce590677b7b..1eb9d3c20886 100644 --- a/drivers/input/touchscreen/ad7879.c +++ b/drivers/input/touchscreen/ad7879.c @@ -470,14 +470,10 @@ static int ad7879_gpio_add(struct ad7879 *ts, static void ad7879_gpio_remove(struct ad7879 *ts) { const struct ad7879_platform_data *pdata = dev_get_platdata(ts->dev); - int ret; - if (pdata->gpio_export) { - ret = gpiochip_remove(&ts->gc); - if (ret) - dev_err(ts->dev, "failed to remove gpio %d\n", - ts->gc.base); - } + if (pdata->gpio_export) + gpiochip_remove(&ts->gc); + } #else static inline int ad7879_gpio_add(struct ad7879 *ts, diff --git a/drivers/leds/leds-pca9532.c b/drivers/leds/leds-pca9532.c index 4a0e786b7832..5a6363d161a2 100644 --- a/drivers/leds/leds-pca9532.c +++ b/drivers/leds/leds-pca9532.c @@ -319,14 +319,8 @@ static int pca9532_destroy_devices(struct pca9532_data *data, int n_devs) } #ifdef CONFIG_LEDS_PCA9532_GPIO - if (data->gpio.dev) { - int err = gpiochip_remove(&data->gpio); - if (err) { - dev_err(&data->client->dev, "%s failed, %d\n", - "gpiochip_remove()", err); - return err; - } - } + if (data->gpio.dev) + gpiochip_remove(&data->gpio); #endif return 0; diff --git a/drivers/leds/leds-tca6507.c b/drivers/leds/leds-tca6507.c index 3d9e267a56c4..20fa8e77f186 100644 --- a/drivers/leds/leds-tca6507.c +++ b/drivers/leds/leds-tca6507.c @@ -667,11 +667,8 @@ static int tca6507_probe_gpios(struct i2c_client *client, static void tca6507_remove_gpio(struct tca6507_chip *tca) { - if (tca->gpio.ngpio) { - int err = gpiochip_remove(&tca->gpio); - dev_err(&tca->client->dev, "%s failed, %d\n", - "gpiochip_remove()", err); - } + if (tca->gpio.ngpio) + gpiochip_remove(&tca->gpio); } #else /* CONFIG_GPIOLIB */ static int tca6507_probe_gpios(struct i2c_client *client, diff --git a/drivers/media/dvb-frontends/cxd2820r_core.c b/drivers/media/dvb-frontends/cxd2820r_core.c index 03930d5e9fea..51ef89312615 100644 --- a/drivers/media/dvb-frontends/cxd2820r_core.c +++ b/drivers/media/dvb-frontends/cxd2820r_core.c @@ -584,18 +584,14 @@ static int cxd2820r_get_frontend_algo(struct dvb_frontend *fe) static void cxd2820r_release(struct dvb_frontend *fe) { struct cxd2820r_priv *priv = fe->demodulator_priv; - int uninitialized_var(ret); /* silence compiler warning */ dev_dbg(&priv->i2c->dev, "%s\n", __func__); #ifdef CONFIG_GPIOLIB /* remove GPIOs */ - if (priv->gpio_chip.label) { - ret = gpiochip_remove(&priv->gpio_chip); - if (ret) - dev_err(&priv->i2c->dev, "%s: gpiochip_remove() " \ - "failed=%d\n", KBUILD_MODNAME, ret); - } + if (priv->gpio_chip.label) + gpiochip_remove(&priv->gpio_chip); + #endif kfree(priv); return; diff --git a/drivers/mfd/asic3.c b/drivers/mfd/asic3.c index 9fc4186d4132..977bd3a3eed0 100644 --- a/drivers/mfd/asic3.c +++ b/drivers/mfd/asic3.c @@ -605,7 +605,8 @@ static int asic3_gpio_remove(struct platform_device *pdev) { struct asic3 *asic = platform_get_drvdata(pdev); - return gpiochip_remove(&asic->gpio); + gpiochip_remove(&asic->gpio); + return 0; } static void asic3_clk_enable(struct asic3 *asic, struct asic3_clk *clk) diff --git a/drivers/mfd/htc-i2cpld.c b/drivers/mfd/htc-i2cpld.c index b44f0203983b..eab3fb028447 100644 --- a/drivers/mfd/htc-i2cpld.c +++ b/drivers/mfd/htc-i2cpld.c @@ -481,15 +481,9 @@ static int htcpld_register_chip_gpio( ret = gpiochip_add(&(chip->chip_in)); if (ret) { - int error; - dev_warn(dev, "Unable to register input GPIOs for 0x%x: %d\n", plat_chip_data->addr, ret); - - error = gpiochip_remove(&(chip->chip_out)); - if (error) - dev_warn(dev, "Error while trying to unregister gpio chip: %d\n", error); - + gpiochip_remove(&(chip->chip_out)); return ret; } diff --git a/drivers/mfd/sm501.c b/drivers/mfd/sm501.c index 81e6d0932bf0..02027b7f1223 100644 --- a/drivers/mfd/sm501.c +++ b/drivers/mfd/sm501.c @@ -1047,7 +1047,6 @@ static int sm501_register_gpio(struct sm501_devdata *sm) struct sm501_gpio *gpio = &sm->gpio; resource_size_t iobase = sm->io_res->start + SM501_GPIO; int ret; - int tmp; dev_dbg(sm->dev, "registering gpio block %08llx\n", (unsigned long long)iobase); @@ -1086,11 +1085,7 @@ static int sm501_register_gpio(struct sm501_devdata *sm) return 0; err_low_chip: - tmp = gpiochip_remove(&gpio->low.gpio); - if (tmp) { - dev_err(sm->dev, "cannot remove low chip, cannot tidy up\n"); - return ret; - } + gpiochip_remove(&gpio->low.gpio); err_mapped: iounmap(gpio->regs); @@ -1105,18 +1100,12 @@ static int sm501_register_gpio(struct sm501_devdata *sm) static void sm501_gpio_remove(struct sm501_devdata *sm) { struct sm501_gpio *gpio = &sm->gpio; - int ret; if (!sm->gpio.registered) return; - ret = gpiochip_remove(&gpio->low.gpio); - if (ret) - dev_err(sm->dev, "cannot remove low chip, cannot tidy up\n"); - - ret = gpiochip_remove(&gpio->high.gpio); - if (ret) - dev_err(sm->dev, "cannot remove high chip, cannot tidy up\n"); + gpiochip_remove(&gpio->low.gpio); + gpiochip_remove(&gpio->high.gpio); iounmap(gpio->regs); release_resource(gpio->regs_res); diff --git a/drivers/mfd/tc6393xb.c b/drivers/mfd/tc6393xb.c index 11c19e538551..4fac16bcd732 100644 --- a/drivers/mfd/tc6393xb.c +++ b/drivers/mfd/tc6393xb.c @@ -607,7 +607,7 @@ static int tc6393xb_probe(struct platform_device *dev) struct tc6393xb_platform_data *tcpd = dev_get_platdata(&dev->dev); struct tc6393xb *tc6393xb; struct resource *iomem, *rscr; - int ret, temp; + int ret; iomem = platform_get_resource(dev, IORESOURCE_MEM, 0); if (!iomem) @@ -714,7 +714,7 @@ err_setup: err_gpio_add: if (tc6393xb->gpio.base != -1) - temp = gpiochip_remove(&tc6393xb->gpio); + gpiochip_remove(&tc6393xb->gpio); tcpd->disable(dev); err_enable: clk_disable(tc6393xb->clk); @@ -744,13 +744,8 @@ static int tc6393xb_remove(struct platform_device *dev) tc6393xb_detach_irq(dev); - if (tc6393xb->gpio.base != -1) { - ret = gpiochip_remove(&tc6393xb->gpio); - if (ret) { - dev_err(&dev->dev, "Can't remove gpio chip: %d\n", ret); - return ret; - } - } + if (tc6393xb->gpio.base != -1) + gpiochip_remove(&tc6393xb->gpio); ret = tcpd->disable(dev); clk_disable(tc6393xb->clk); diff --git a/drivers/mfd/ucb1x00-core.c b/drivers/mfd/ucb1x00-core.c index 153d595afaac..58ea9fdd3a15 100644 --- a/drivers/mfd/ucb1x00-core.c +++ b/drivers/mfd/ucb1x00-core.c @@ -621,7 +621,6 @@ static void ucb1x00_remove(struct mcp *mcp) struct ucb1x00_plat_data *pdata = mcp->attached_device.platform_data; struct ucb1x00 *ucb = mcp_get_drvdata(mcp); struct list_head *l, *n; - int ret; mutex_lock(&ucb1x00_mutex); list_del(&ucb->node); @@ -631,11 +630,8 @@ static void ucb1x00_remove(struct mcp *mcp) } mutex_unlock(&ucb1x00_mutex); - if (ucb->gpio.base != -1) { - ret = gpiochip_remove(&ucb->gpio); - if (ret) - dev_err(&ucb->dev, "Can't remove gpio chip: %d\n", ret); - } + if (ucb->gpio.base != -1) + gpiochip_remove(&ucb->gpio); irq_set_chained_handler(ucb->irq, NULL); irq_free_descs(ucb->irq_base, 16); diff --git a/drivers/platform/x86/intel_pmic_gpio.c b/drivers/platform/x86/intel_pmic_gpio.c index 40929e4f7ad7..04fed00b88e9 100644 --- a/drivers/platform/x86/intel_pmic_gpio.c +++ b/drivers/platform/x86/intel_pmic_gpio.c @@ -301,8 +301,7 @@ static int platform_pmic_gpio_probe(struct platform_device *pdev) return 0; fail_request_irq: - if (gpiochip_remove(&pg->chip)) - pr_err("gpiochip_remove failed\n"); + gpiochip_remove(&pg->chip); err: iounmap(pg->gpiointr); err2: diff --git a/drivers/ssb/driver_gpio.c b/drivers/ssb/driver_gpio.c index ba350d2035c0..f92e266d48f8 100644 --- a/drivers/ssb/driver_gpio.c +++ b/drivers/ssb/driver_gpio.c @@ -475,7 +475,8 @@ int ssb_gpio_unregister(struct ssb_bus *bus) { if (ssb_chipco_available(&bus->chipco) || ssb_extif_available(&bus->extif)) { - return gpiochip_remove(&bus->gpio); + gpiochip_remove(&bus->gpio); + return 0; } else { SSB_WARN_ON(1); } diff --git a/drivers/staging/vme/devices/vme_pio2_gpio.c b/drivers/staging/vme/devices/vme_pio2_gpio.c index f00af0786af3..3304d9227c3c 100644 --- a/drivers/staging/vme/devices/vme_pio2_gpio.c +++ b/drivers/staging/vme/devices/vme_pio2_gpio.c @@ -221,9 +221,7 @@ void pio2_gpio_exit(struct pio2_card *card) { const char *label = card->gc.label; - if (gpiochip_remove(&(card->gc))) - dev_err(&card->vdev->dev, "Failed to remove GPIO\n"); - + gpiochip_remove(&(card->gc)); kfree(label); } diff --git a/drivers/tty/serial/max310x.c b/drivers/tty/serial/max310x.c index 82573dc4d8cf..0041a64cc86e 100644 --- a/drivers/tty/serial/max310x.c +++ b/drivers/tty/serial/max310x.c @@ -1248,7 +1248,7 @@ static int max310x_probe(struct device *dev, struct max310x_devtype *devtype, mutex_destroy(&s->mutex); #ifdef CONFIG_GPIOLIB - WARN_ON(gpiochip_remove(&s->gpio)); + gpiochip_remove(&s->gpio); out_uart: #endif @@ -1263,12 +1263,10 @@ out_clk: static int max310x_remove(struct device *dev) { struct max310x_port *s = dev_get_drvdata(dev); - int i, ret = 0; + int i; #ifdef CONFIG_GPIOLIB - ret = gpiochip_remove(&s->gpio); - if (ret) - return ret; + gpiochip_remove(&s->gpio); #endif for (i = 0; i < s->uart.nr; i++) { @@ -1282,7 +1280,7 @@ static int max310x_remove(struct device *dev) uart_unregister_driver(&s->uart); clk_disable_unprepare(s->clk); - return ret; + return 0; } static const struct of_device_id __maybe_unused max310x_dt_ids[] = { diff --git a/drivers/video/fbdev/via/via-gpio.c b/drivers/video/fbdev/via/via-gpio.c index e408679081ab..6f433b8cee12 100644 --- a/drivers/video/fbdev/via/via-gpio.c +++ b/drivers/video/fbdev/via/via-gpio.c @@ -270,7 +270,7 @@ static int viafb_gpio_probe(struct platform_device *platdev) static int viafb_gpio_remove(struct platform_device *platdev) { unsigned long flags; - int ret = 0, i; + int i; #ifdef CONFIG_PM viafb_pm_unregister(&viafb_gpio_pm_hooks); @@ -280,11 +280,7 @@ static int viafb_gpio_remove(struct platform_device *platdev) * Get unregistered. */ if (viafb_gpio_config.gpio_chip.ngpio > 0) { - ret = gpiochip_remove(&viafb_gpio_config.gpio_chip); - if (ret) { /* Somebody still using it? */ - printk(KERN_ERR "Viafb: GPIO remove failed\n"); - return ret; - } + gpiochip_remove(&viafb_gpio_config.gpio_chip); } /* * Disable the ports. @@ -294,7 +290,7 @@ static int viafb_gpio_remove(struct platform_device *platdev) viafb_gpio_disable(viafb_gpio_config.active_gpios[i]); viafb_gpio_config.gpio_chip.ngpio = 0; spin_unlock_irqrestore(&viafb_gpio_config.vdev->reg_lock, flags); - return ret; + return 0; } static struct platform_driver via_gpio_driver = { -- cgit From 2fcea6cecbc965b4e02a39537d9d939f5251bbbd Mon Sep 17 00:00:00 2001 From: Linus Walleij Date: Tue, 16 Sep 2014 15:05:41 -0700 Subject: pinctrl: remove remaining users of gpiochip_remove() retval Some drivers accidentally still use the return value from gpiochip_remove(). Get rid of them so we can simplify this function and get rid of the return value. Cc: Abdoulaye Berthe Signed-off-by: Linus Walleij --- drivers/pinctrl/nomadik/pinctrl-abx500.c | 14 ++------------ drivers/pinctrl/nomadik/pinctrl-nomadik.c | 2 +- drivers/pinctrl/qcom/pinctrl-msm.c | 9 +-------- drivers/pinctrl/samsung/pinctrl-exynos5440.c | 6 +----- drivers/pinctrl/samsung/pinctrl-samsung.c | 15 ++++----------- drivers/pinctrl/sirf/pinctrl-sirf.c | 3 +-- 6 files changed, 10 insertions(+), 39 deletions(-) (limited to 'drivers') diff --git a/drivers/pinctrl/nomadik/pinctrl-abx500.c b/drivers/pinctrl/nomadik/pinctrl-abx500.c index a53a689a2bfa..7df34b70e8b6 100644 --- a/drivers/pinctrl/nomadik/pinctrl-abx500.c +++ b/drivers/pinctrl/nomadik/pinctrl-abx500.c @@ -1298,10 +1298,7 @@ static int abx500_gpio_probe(struct platform_device *pdev) return 0; out_rem_chip: - err = gpiochip_remove(&pct->chip); - if (err) - dev_info(&pdev->dev, "failed to remove gpiochip\n"); - + gpiochip_remove(&pct->chip); return ret; } @@ -1312,15 +1309,8 @@ out_rem_chip: static int abx500_gpio_remove(struct platform_device *pdev) { struct abx500_pinctrl *pct = platform_get_drvdata(pdev); - int ret; - - ret = gpiochip_remove(&pct->chip); - if (ret < 0) { - dev_err(pct->dev, "unable to remove gpiochip: %d\n", - ret); - return ret; - } + gpiochip_remove(&pct->chip); return 0; } diff --git a/drivers/pinctrl/nomadik/pinctrl-nomadik.c b/drivers/pinctrl/nomadik/pinctrl-nomadik.c index e7cab07eef47..4332b38c52ab 100644 --- a/drivers/pinctrl/nomadik/pinctrl-nomadik.c +++ b/drivers/pinctrl/nomadik/pinctrl-nomadik.c @@ -1261,7 +1261,7 @@ static int nmk_gpio_probe(struct platform_device *dev) IRQ_TYPE_EDGE_FALLING); if (ret) { dev_err(&dev->dev, "could not add irqchip\n"); - ret = gpiochip_remove(&nmk_chip->chip); + gpiochip_remove(&nmk_chip->chip); return -ENODEV; } /* Then register the chain on the parent IRQ */ diff --git a/drivers/pinctrl/qcom/pinctrl-msm.c b/drivers/pinctrl/qcom/pinctrl-msm.c index 2738108caff2..041677113a48 100644 --- a/drivers/pinctrl/qcom/pinctrl-msm.c +++ b/drivers/pinctrl/qcom/pinctrl-msm.c @@ -903,16 +903,9 @@ EXPORT_SYMBOL(msm_pinctrl_probe); int msm_pinctrl_remove(struct platform_device *pdev) { struct msm_pinctrl *pctrl = platform_get_drvdata(pdev); - int ret; - - ret = gpiochip_remove(&pctrl->chip); - if (ret) { - dev_err(&pdev->dev, "Failed to remove gpiochip\n"); - return ret; - } + gpiochip_remove(&pctrl->chip); pinctrl_unregister(pctrl->pctrl); - return 0; } EXPORT_SYMBOL(msm_pinctrl_remove); diff --git a/drivers/pinctrl/samsung/pinctrl-exynos5440.c b/drivers/pinctrl/samsung/pinctrl-exynos5440.c index 603da2f9dd95..8ef370244aee 100644 --- a/drivers/pinctrl/samsung/pinctrl-exynos5440.c +++ b/drivers/pinctrl/samsung/pinctrl-exynos5440.c @@ -873,11 +873,7 @@ static int exynos5440_gpiolib_register(struct platform_device *pdev, static int exynos5440_gpiolib_unregister(struct platform_device *pdev, struct exynos5440_pinctrl_priv_data *priv) { - int ret = gpiochip_remove(priv->gc); - if (ret) { - dev_err(&pdev->dev, "gpio chip remove failed\n"); - return ret; - } + gpiochip_remove(priv->gc); return 0; } diff --git a/drivers/pinctrl/samsung/pinctrl-samsung.c b/drivers/pinctrl/samsung/pinctrl-samsung.c index b07406da333c..83faddf456e0 100644 --- a/drivers/pinctrl/samsung/pinctrl-samsung.c +++ b/drivers/pinctrl/samsung/pinctrl-samsung.c @@ -945,9 +945,7 @@ static int samsung_gpiolib_register(struct platform_device *pdev, fail: for (--i, --bank; i >= 0; --i, --bank) - if (gpiochip_remove(&bank->gpio_chip)) - dev_err(&pdev->dev, "gpio chip %s remove failed\n", - bank->gpio_chip.label); + gpiochip_remove(&bank->gpio_chip); return ret; } @@ -957,16 +955,11 @@ static int samsung_gpiolib_unregister(struct platform_device *pdev, { struct samsung_pin_ctrl *ctrl = drvdata->ctrl; struct samsung_pin_bank *bank = ctrl->pin_banks; - int ret = 0; int i; - for (i = 0; !ret && i < ctrl->nr_banks; ++i, ++bank) - ret = gpiochip_remove(&bank->gpio_chip); - - if (ret) - dev_err(&pdev->dev, "gpio chip remove failed\n"); - - return ret; + for (i = 0; i < ctrl->nr_banks; ++i, ++bank) + gpiochip_remove(&bank->gpio_chip); + return 0; } static const struct of_device_id samsung_pinctrl_dt_match[]; diff --git a/drivers/pinctrl/sirf/pinctrl-sirf.c b/drivers/pinctrl/sirf/pinctrl-sirf.c index 4c1d7c68666d..25eefdbb76b6 100644 --- a/drivers/pinctrl/sirf/pinctrl-sirf.c +++ b/drivers/pinctrl/sirf/pinctrl-sirf.c @@ -877,8 +877,7 @@ static int sirfsoc_gpio_probe(struct device_node *np) out_no_range: out_banks: - if (gpiochip_remove(&sgpio->chip.gc)) - dev_err(&pdev->dev, "could not remove gpio chip\n"); + gpiochip_remove(&sgpio->chip.gc); out: iounmap(regs); return err; -- cgit From da26d5d803e45a30c7d72b83ce906f3a466f4cc3 Mon Sep 17 00:00:00 2001 From: Linus Walleij Date: Tue, 16 Sep 2014 15:11:41 -0700 Subject: gpio: remove remaining users of gpiochip_remove() retval Some drivers accidentally still use the return value from gpiochip_remove(). Get rid of them so we can simplify this function and get rid of the return value. Cc: Abdoulaye Berthe Acked-by: Alexandre Courbot Acked-by: Javier Martinez Canillas Signed-off-by: Linus Walleij --- drivers/gpio/gpio-crystalcove.c | 9 +++------ drivers/gpio/gpio-omap.c | 2 +- drivers/gpio/gpio-xgene.c | 7 ++----- drivers/gpio/gpio-zynq.c | 8 +------- 4 files changed, 7 insertions(+), 19 deletions(-) (limited to 'drivers') diff --git a/drivers/gpio/gpio-crystalcove.c b/drivers/gpio/gpio-crystalcove.c index 934462f5bd22..e3712f0e51ab 100644 --- a/drivers/gpio/gpio-crystalcove.c +++ b/drivers/gpio/gpio-crystalcove.c @@ -346,7 +346,7 @@ static int crystalcove_gpio_probe(struct platform_device *pdev) return 0; out_remove_gpio: - WARN_ON(gpiochip_remove(&cg->chip)); + gpiochip_remove(&cg->chip); return retval; } @@ -354,14 +354,11 @@ static int crystalcove_gpio_remove(struct platform_device *pdev) { struct crystalcove_gpio *cg = platform_get_drvdata(pdev); int irq = platform_get_irq(pdev, 0); - int err; - - err = gpiochip_remove(&cg->chip); + gpiochip_remove(&cg->chip); if (irq >= 0) free_irq(irq, cg); - - return err; + return 0; } static struct platform_driver crystalcove_gpio_driver = { diff --git a/drivers/gpio/gpio-omap.c b/drivers/gpio/gpio-omap.c index 174932165fcb..5cd33677a018 100644 --- a/drivers/gpio/gpio-omap.c +++ b/drivers/gpio/gpio-omap.c @@ -1143,7 +1143,7 @@ static int omap_gpio_chip_init(struct gpio_bank *bank) if (ret) { dev_err(bank->dev, "Couldn't add irqchip to gpiochip %d\n", ret); - ret = gpiochip_remove(&bank->chip); + gpiochip_remove(&bank->chip); return -ENODEV; } diff --git a/drivers/gpio/gpio-xgene.c b/drivers/gpio/gpio-xgene.c index e25ba14fbb64..f1944d496c3b 100644 --- a/drivers/gpio/gpio-xgene.c +++ b/drivers/gpio/gpio-xgene.c @@ -216,12 +216,9 @@ err: static int xgene_gpio_remove(struct platform_device *pdev) { struct xgene_gpio *gpio = platform_get_drvdata(pdev); - int ret = 0; - ret = gpiochip_remove(&gpio->chip); - if (ret) - dev_err(&pdev->dev, "unable to remove gpio_chip.\n"); - return ret; + gpiochip_remove(&gpio->chip); + return 0; } #ifdef CONFIG_OF diff --git a/drivers/gpio/gpio-zynq.c b/drivers/gpio/gpio-zynq.c index 5dfbced24815..74cd480bf8de 100644 --- a/drivers/gpio/gpio-zynq.c +++ b/drivers/gpio/gpio-zynq.c @@ -686,16 +686,10 @@ err_disable_clk: */ static int zynq_gpio_remove(struct platform_device *pdev) { - int ret; struct zynq_gpio *gpio = platform_get_drvdata(pdev); pm_runtime_get_sync(&pdev->dev); - - ret = gpiochip_remove(&gpio->chip); - if (ret) { - dev_err(&pdev->dev, "Failed to remove gpio chip\n"); - return ret; - } + gpiochip_remove(&gpio->chip); clk_disable_unprepare(gpio->clk); device_set_wakeup_capable(&pdev->dev, 0); return 0; -- cgit From e27e278608d0dca1b97abea3c1855beafcc68bcb Mon Sep 17 00:00:00 2001 From: Linus Walleij Date: Tue, 16 Sep 2014 15:14:46 -0700 Subject: tty: sc16is7xx: remove retval from gpiochip_remove() We are trying to smoke out the use of the return value from gpiochip_remove() from the kernel, this has been missed. Acked-by: Greg Kroah-Hartman Signed-off-by: Linus Walleij --- drivers/tty/serial/sc16is7xx.c | 13 +++++-------- 1 file changed, 5 insertions(+), 8 deletions(-) (limited to 'drivers') diff --git a/drivers/tty/serial/sc16is7xx.c b/drivers/tty/serial/sc16is7xx.c index 3284c31085a7..6246820d7f05 100644 --- a/drivers/tty/serial/sc16is7xx.c +++ b/drivers/tty/serial/sc16is7xx.c @@ -1157,7 +1157,7 @@ static int sc16is7xx_probe(struct device *dev, #ifdef CONFIG_GPIOLIB if (devtype->nr_gpio) - WARN_ON(gpiochip_remove(&s->gpio)); + gpiochip_remove(&s->gpio); out_uart: #endif @@ -1173,14 +1173,11 @@ out_clk: static int sc16is7xx_remove(struct device *dev) { struct sc16is7xx_port *s = dev_get_drvdata(dev); - int i, ret = 0; + int i; #ifdef CONFIG_GPIOLIB - if (s->devtype->nr_gpio) { - ret = gpiochip_remove(&s->gpio); - if (ret) - return ret; - } + if (s->devtype->nr_gpio) + gpiochip_remove(&s->gpio); #endif for (i = 0; i < s->uart.nr; i++) { @@ -1195,7 +1192,7 @@ static int sc16is7xx_remove(struct device *dev) if (!IS_ERR(s->clk)) clk_disable_unprepare(s->clk); - return ret; + return 0; } static const struct of_device_id __maybe_unused sc16is7xx_dt_ids[] = { -- cgit From e1db1706c86ee455f25eeaeadeda827e1e02310f Mon Sep 17 00:00:00 2001 From: abdoulaye berthe Date: Sat, 5 Jul 2014 18:28:50 +0200 Subject: gpio: gpiolib: set gpiochip_remove retval to void This avoids handling gpiochip remove error in device remove handler. Signed-off-by: Abdoulaye Berthe Signed-off-by: Linus Walleij --- drivers/gpio/gpiolib.c | 24 +++++++----------------- 1 file changed, 7 insertions(+), 17 deletions(-) (limited to 'drivers') diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c index a5831d6a9b91..bf1bb795f100 100644 --- a/drivers/gpio/gpiolib.c +++ b/drivers/gpio/gpiolib.c @@ -308,10 +308,9 @@ static void gpiochip_irqchip_remove(struct gpio_chip *gpiochip); * * A gpio_chip with any GPIOs still requested may not be removed. */ -int gpiochip_remove(struct gpio_chip *chip) +void gpiochip_remove(struct gpio_chip *chip) { unsigned long flags; - int status = 0; unsigned id; acpi_gpiochip_remove(chip); @@ -323,24 +322,15 @@ int gpiochip_remove(struct gpio_chip *chip) of_gpiochip_remove(chip); for (id = 0; id < chip->ngpio; id++) { - if (test_bit(FLAG_REQUESTED, &chip->desc[id].flags)) { - status = -EBUSY; - break; - } - } - if (status == 0) { - for (id = 0; id < chip->ngpio; id++) - chip->desc[id].chip = NULL; - - list_del(&chip->list); + if (test_bit(FLAG_REQUESTED, &chip->desc[id].flags)) + dev_crit(chip->dev, "REMOVING GPIOCHIP WITH GPIOS STILL REQUESTED\n"); } + for (id = 0; id < chip->ngpio; id++) + chip->desc[id].chip = NULL; + list_del(&chip->list); spin_unlock_irqrestore(&gpio_lock, flags); - - if (status == 0) - gpiochip_unexport(chip); - - return status; + gpiochip_unexport(chip); } EXPORT_SYMBOL_GPL(gpiochip_remove); -- cgit From 3d2613c4289ff22de3aa24d2d0a29e33937f023a Mon Sep 17 00:00:00 2001 From: Weike Chen Date: Wed, 17 Sep 2014 09:18:39 -0700 Subject: GPIO: gpio-dwapb: Enable platform driver binding to MFD driver The Synopsys DesignWare APB GPIO driver only supports open firmware devices. But, like Intel Quark X1000 SOC, which has a single PCI function exporting a GPIO and an I2C controller, it is a Multifunction device. This patch is to enable the current Synopsys DesignWare APB GPIO driver to support the Multifunction device which exports the designware GPIO controller. Reviewed-by: Hock Leong Kweh Signed-off-by: Weike Chen Signed-off-by: Linus Walleij --- drivers/gpio/Kconfig | 1 - drivers/gpio/gpio-dwapb.c | 224 ++++++++++++++++++++++++++++++++++------------ 2 files changed, 167 insertions(+), 58 deletions(-) (limited to 'drivers') diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig index ec398bee7c60..d9ffb6dfa54b 100644 --- a/drivers/gpio/Kconfig +++ b/drivers/gpio/Kconfig @@ -136,7 +136,6 @@ config GPIO_DWAPB tristate "Synopsys DesignWare APB GPIO driver" select GPIO_GENERIC select GENERIC_IRQ_CHIP - depends on OF_GPIO help Say Y or M here to build support for the Synopsys DesignWare APB GPIO block. diff --git a/drivers/gpio/gpio-dwapb.c b/drivers/gpio/gpio-dwapb.c index d6618a6e2399..27466b5af5e8 100644 --- a/drivers/gpio/gpio-dwapb.c +++ b/drivers/gpio/gpio-dwapb.c @@ -21,6 +21,8 @@ #include #include #include +#include +#include #define GPIO_SWPORTA_DR 0x00 #define GPIO_SWPORTA_DDR 0x04 @@ -84,11 +86,10 @@ static void dwapb_toggle_trigger(struct dwapb_gpio *gpio, unsigned int offs) writel(v, gpio->regs + GPIO_INT_POLARITY); } -static void dwapb_irq_handler(u32 irq, struct irq_desc *desc) +static u32 dwapb_do_irq(struct dwapb_gpio *gpio) { - struct dwapb_gpio *gpio = irq_get_handler_data(irq); - struct irq_chip *chip = irq_desc_get_chip(desc); u32 irq_status = readl_relaxed(gpio->regs + GPIO_INTSTATUS); + u32 ret = irq_status; while (irq_status) { int hwirq = fls(irq_status) - 1; @@ -102,6 +103,16 @@ static void dwapb_irq_handler(u32 irq, struct irq_desc *desc) dwapb_toggle_trigger(gpio, hwirq); } + return ret; +} + +static void dwapb_irq_handler(u32 irq, struct irq_desc *desc) +{ + struct dwapb_gpio *gpio = irq_get_handler_data(irq); + struct irq_chip *chip = irq_desc_get_chip(desc); + + dwapb_do_irq(gpio); + if (chip->irq_eoi) chip->irq_eoi(irq_desc_get_irq_data(desc)); } @@ -207,22 +218,26 @@ static int dwapb_irq_set_type(struct irq_data *d, u32 type) return 0; } +static irqreturn_t dwapb_irq_handler_mfd(int irq, void *dev_id) +{ + u32 worked; + struct dwapb_gpio *gpio = dev_id; + + worked = dwapb_do_irq(gpio); + + return worked ? IRQ_HANDLED : IRQ_NONE; +} + static void dwapb_configure_irqs(struct dwapb_gpio *gpio, - struct dwapb_gpio_port *port) + struct dwapb_gpio_port *port, + struct dwapb_port_property *pp) { struct gpio_chip *gc = &port->bgc.gc; - struct device_node *node = gc->of_node; - struct irq_chip_generic *irq_gc; + struct device_node *node = pp->node; + struct irq_chip_generic *irq_gc = NULL; unsigned int hwirq, ngpio = gc->ngpio; struct irq_chip_type *ct; - int err, irq, i; - - irq = irq_of_parse_and_map(node, 0); - if (!irq) { - dev_warn(gpio->dev, "no irq for bank %s\n", - port->bgc.gc.of_node->full_name); - return; - } + int err, i; gpio->domain = irq_domain_add_linear(node, ngpio, &irq_generic_chip_ops, gpio); @@ -269,8 +284,24 @@ static void dwapb_configure_irqs(struct dwapb_gpio *gpio, irq_gc->chip_types[1].type = IRQ_TYPE_EDGE_BOTH; irq_gc->chip_types[1].handler = handle_edge_irq; - irq_set_chained_handler(irq, dwapb_irq_handler); - irq_set_handler_data(irq, gpio); + if (!pp->irq_shared) { + irq_set_chained_handler(pp->irq, dwapb_irq_handler); + irq_set_handler_data(pp->irq, gpio); + } else { + /* + * Request a shared IRQ since where MFD would have devices + * using the same irq pin + */ + err = devm_request_irq(gpio->dev, pp->irq, + dwapb_irq_handler_mfd, + IRQF_SHARED, "gpio-dwapb-mfd", gpio); + if (err) { + dev_err(gpio->dev, "error requesting IRQ\n"); + irq_domain_remove(gpio->domain); + gpio->domain = NULL; + return; + } + } for (hwirq = 0 ; hwirq < ngpio ; hwirq++) irq_create_mapping(gpio->domain, hwirq); @@ -296,57 +327,42 @@ static void dwapb_irq_teardown(struct dwapb_gpio *gpio) } static int dwapb_gpio_add_port(struct dwapb_gpio *gpio, - struct device_node *port_np, + struct dwapb_port_property *pp, unsigned int offs) { struct dwapb_gpio_port *port; - u32 port_idx, ngpio; void __iomem *dat, *set, *dirout; int err; - if (of_property_read_u32(port_np, "reg", &port_idx) || - port_idx >= DWAPB_MAX_PORTS) { - dev_err(gpio->dev, "missing/invalid port index for %s\n", - port_np->full_name); - return -EINVAL; - } - port = &gpio->ports[offs]; port->gpio = gpio; - if (of_property_read_u32(port_np, "snps,nr-gpios", &ngpio)) { - dev_info(gpio->dev, "failed to get number of gpios for %s\n", - port_np->full_name); - ngpio = 32; - } - - dat = gpio->regs + GPIO_EXT_PORTA + (port_idx * GPIO_EXT_PORT_SIZE); - set = gpio->regs + GPIO_SWPORTA_DR + (port_idx * GPIO_SWPORT_DR_SIZE); + dat = gpio->regs + GPIO_EXT_PORTA + (pp->idx * GPIO_EXT_PORT_SIZE); + set = gpio->regs + GPIO_SWPORTA_DR + (pp->idx * GPIO_SWPORT_DR_SIZE); dirout = gpio->regs + GPIO_SWPORTA_DDR + - (port_idx * GPIO_SWPORT_DDR_SIZE); + (pp->idx * GPIO_SWPORT_DDR_SIZE); err = bgpio_init(&port->bgc, gpio->dev, 4, dat, set, NULL, dirout, NULL, false); if (err) { dev_err(gpio->dev, "failed to init gpio chip for %s\n", - port_np->full_name); + pp->name); return err; } - port->bgc.gc.ngpio = ngpio; - port->bgc.gc.of_node = port_np; +#ifdef CONFIG_OF_GPIO + port->bgc.gc.of_node = pp->node; +#endif + port->bgc.gc.ngpio = pp->ngpio; + port->bgc.gc.base = pp->gpio_base; - /* - * Only port A can provide interrupts in all configurations of the IP. - */ - if (port_idx == 0 && - of_property_read_bool(port_np, "interrupt-controller")) - dwapb_configure_irqs(gpio, port); + if (pp->irq) + dwapb_configure_irqs(gpio, port, pp); err = gpiochip_add(&port->bgc.gc); if (err) dev_err(gpio->dev, "failed to register gpiochip for %s\n", - port_np->full_name); + pp->name); else port->is_registered = true; @@ -362,25 +378,116 @@ static void dwapb_gpio_unregister(struct dwapb_gpio *gpio) gpiochip_remove(&gpio->ports[m].bgc.gc); } +static struct dwapb_platform_data * +dwapb_gpio_get_pdata_of(struct device *dev) +{ + struct device_node *node, *port_np; + struct dwapb_platform_data *pdata; + struct dwapb_port_property *pp; + int nports; + int i; + + node = dev->of_node; + if (!IS_ENABLED(CONFIG_OF_GPIO) || !node) + return ERR_PTR(-ENODEV); + + nports = of_get_child_count(node); + if (nports == 0) + return ERR_PTR(-ENODEV); + + pdata = kzalloc(sizeof(*pdata), GFP_KERNEL); + if (!pdata) + return ERR_PTR(-ENOMEM); + + pdata->properties = kcalloc(nports, sizeof(*pp), GFP_KERNEL); + if (!pdata->properties) { + kfree(pdata); + return ERR_PTR(-ENOMEM); + } + + pdata->nports = nports; + + i = 0; + for_each_child_of_node(node, port_np) { + pp = &pdata->properties[i++]; + pp->node = port_np; + + if (of_property_read_u32(port_np, "reg", &pp->idx) || + pp->idx >= DWAPB_MAX_PORTS) { + dev_err(dev, "missing/invalid port index for %s\n", + port_np->full_name); + kfree(pdata->properties); + kfree(pdata); + return ERR_PTR(-EINVAL); + } + + if (of_property_read_u32(port_np, "snps,nr-gpios", + &pp->ngpio)) { + dev_info(dev, "failed to get number of gpios for %s\n", + port_np->full_name); + pp->ngpio = 32; + } + + /* + * Only port A can provide interrupts in all configurations of + * the IP. + */ + if (pp->idx == 0 && + of_property_read_bool(port_np, "interrupt-controller")) { + pp->irq = irq_of_parse_and_map(port_np, 0); + if (!pp->irq) { + dev_warn(dev, "no irq for bank %s\n", + port_np->full_name); + } + } + + pp->irq_shared = false; + pp->gpio_base = -1; + pp->name = port_np->full_name; + } + + return pdata; +} + +static inline void dwapb_free_pdata_of(struct dwapb_platform_data *pdata) +{ + if (!IS_ENABLED(CONFIG_OF_GPIO) || !pdata) + return; + + kfree(pdata->properties); + kfree(pdata); +} + static int dwapb_gpio_probe(struct platform_device *pdev) { + unsigned int i; struct resource *res; struct dwapb_gpio *gpio; - struct device_node *np; int err; - unsigned int offs = 0; + struct device *dev = &pdev->dev; + struct dwapb_platform_data *pdata = dev_get_platdata(dev); + bool is_pdata_alloc = !pdata; + + if (is_pdata_alloc) { + pdata = dwapb_gpio_get_pdata_of(dev); + if (IS_ERR(pdata)) + return PTR_ERR(pdata); + } - gpio = devm_kzalloc(&pdev->dev, sizeof(*gpio), GFP_KERNEL); - if (!gpio) - return -ENOMEM; - gpio->dev = &pdev->dev; + if (!pdata->nports) { + err = -ENODEV; + goto out_err; + } - gpio->nr_ports = of_get_child_count(pdev->dev.of_node); - if (!gpio->nr_ports) { - err = -EINVAL; + gpio = devm_kzalloc(&pdev->dev, sizeof(*gpio), GFP_KERNEL); + if (!gpio) { + err = -ENOMEM; goto out_err; } - gpio->ports = devm_kzalloc(&pdev->dev, gpio->nr_ports * + gpio->dev = &pdev->dev; + gpio->nr_ports = pdata->nports; + + gpio->ports = devm_kcalloc(&pdev->dev, gpio->nr_ports, sizeof(*gpio->ports), GFP_KERNEL); if (!gpio->ports) { err = -ENOMEM; @@ -394,20 +501,23 @@ static int dwapb_gpio_probe(struct platform_device *pdev) goto out_err; } - for_each_child_of_node(pdev->dev.of_node, np) { - err = dwapb_gpio_add_port(gpio, np, offs++); + for (i = 0; i < gpio->nr_ports; i++) { + err = dwapb_gpio_add_port(gpio, &pdata->properties[i], i); if (err) goto out_unregister; } platform_set_drvdata(pdev, gpio); - return 0; + goto out_err; out_unregister: dwapb_gpio_unregister(gpio); dwapb_irq_teardown(gpio); out_err: + if (is_pdata_alloc) + dwapb_free_pdata_of(pdata); + return err; } -- cgit From 67809b974a07042dc61cb9d06e30df7a5f25446a Mon Sep 17 00:00:00 2001 From: Weike Chen Date: Wed, 17 Sep 2014 09:18:40 -0700 Subject: GPIO: gpio-dwapb: Change readl&writel to dwapb_read&dwapb_write This patch replaces 'readl&writel' with 'dwapb_read&dwapb_write'. Reviewed-by: Shevchenko, Andriy Signed-off-by: Weike Chen Signed-off-by: Linus Walleij --- drivers/gpio/gpio-dwapb.c | 37 +++++++++++++++++++++++++++---------- 1 file changed, 27 insertions(+), 10 deletions(-) (limited to 'drivers') diff --git a/drivers/gpio/gpio-dwapb.c b/drivers/gpio/gpio-dwapb.c index 27466b5af5e8..551eaf7208f4 100644 --- a/drivers/gpio/gpio-dwapb.c +++ b/drivers/gpio/gpio-dwapb.c @@ -64,6 +64,23 @@ struct dwapb_gpio { struct irq_domain *domain; }; +static inline u32 dwapb_read(struct dwapb_gpio *gpio, unsigned int offset) +{ + struct bgpio_chip *bgc = &gpio->ports[0].bgc; + void __iomem *reg_base = gpio->regs; + + return bgc->read_reg(reg_base + offset); +} + +static inline void dwapb_write(struct dwapb_gpio *gpio, unsigned int offset, + u32 val) +{ + struct bgpio_chip *bgc = &gpio->ports[0].bgc; + void __iomem *reg_base = gpio->regs; + + bgc->write_reg(reg_base + offset, val); +} + static int dwapb_gpio_to_irq(struct gpio_chip *gc, unsigned offset) { struct bgpio_chip *bgc = to_bgpio_chip(gc); @@ -76,14 +93,14 @@ static int dwapb_gpio_to_irq(struct gpio_chip *gc, unsigned offset) static void dwapb_toggle_trigger(struct dwapb_gpio *gpio, unsigned int offs) { - u32 v = readl(gpio->regs + GPIO_INT_POLARITY); + u32 v = dwapb_read(gpio, GPIO_INT_POLARITY); if (gpio_get_value(gpio->ports[0].bgc.gc.base + offs)) v &= ~BIT(offs); else v |= BIT(offs); - writel(v, gpio->regs + GPIO_INT_POLARITY); + dwapb_write(gpio, GPIO_INT_POLARITY, v); } static u32 dwapb_do_irq(struct dwapb_gpio *gpio) @@ -126,9 +143,9 @@ static void dwapb_irq_enable(struct irq_data *d) u32 val; spin_lock_irqsave(&bgc->lock, flags); - val = readl(gpio->regs + GPIO_INTEN); + val = dwapb_read(gpio, GPIO_INTEN); val |= BIT(d->hwirq); - writel(val, gpio->regs + GPIO_INTEN); + dwapb_write(gpio, GPIO_INTEN, val); spin_unlock_irqrestore(&bgc->lock, flags); } @@ -141,9 +158,9 @@ static void dwapb_irq_disable(struct irq_data *d) u32 val; spin_lock_irqsave(&bgc->lock, flags); - val = readl(gpio->regs + GPIO_INTEN); + val = dwapb_read(gpio, GPIO_INTEN); val &= ~BIT(d->hwirq); - writel(val, gpio->regs + GPIO_INTEN); + dwapb_write(gpio, GPIO_INTEN, val); spin_unlock_irqrestore(&bgc->lock, flags); } @@ -183,8 +200,8 @@ static int dwapb_irq_set_type(struct irq_data *d, u32 type) return -EINVAL; spin_lock_irqsave(&bgc->lock, flags); - level = readl(gpio->regs + GPIO_INTTYPE_LEVEL); - polarity = readl(gpio->regs + GPIO_INT_POLARITY); + level = dwapb_read(gpio, GPIO_INTTYPE_LEVEL); + polarity = dwapb_read(gpio, GPIO_INT_POLARITY); switch (type) { case IRQ_TYPE_EDGE_BOTH: @@ -211,8 +228,8 @@ static int dwapb_irq_set_type(struct irq_data *d, u32 type) irq_setup_alt_chip(d, type); - writel(level, gpio->regs + GPIO_INTTYPE_LEVEL); - writel(polarity, gpio->regs + GPIO_INT_POLARITY); + dwapb_write(gpio, GPIO_INTTYPE_LEVEL, level); + dwapb_write(gpio, GPIO_INT_POLARITY, polarity); spin_unlock_irqrestore(&bgc->lock, flags); return 0; -- cgit From 5d60d9efe1447b46f33075fb5841fd83247cdbb2 Mon Sep 17 00:00:00 2001 From: Weike Chen Date: Wed, 17 Sep 2014 09:18:41 -0700 Subject: GPIO: gpio-dwapb: Support Debounce This patch enables 'debounce' for the designware GPIO, and it is based on Josef Ahmad's previous work. Reviewed-by: Hock Leong Kweh Reviewed-by: Andy Shevchenko Signed-off-by: Weike Chen Signed-off-by: Linus Walleij --- drivers/gpio/gpio-dwapb.c | 36 ++++++++++++++++++++++++++++++++++-- 1 file changed, 34 insertions(+), 2 deletions(-) (limited to 'drivers') diff --git a/drivers/gpio/gpio-dwapb.c b/drivers/gpio/gpio-dwapb.c index 551eaf7208f4..db059bb8edc3 100644 --- a/drivers/gpio/gpio-dwapb.c +++ b/drivers/gpio/gpio-dwapb.c @@ -37,6 +37,7 @@ #define GPIO_INTTYPE_LEVEL 0x38 #define GPIO_INT_POLARITY 0x3c #define GPIO_INTSTATUS 0x40 +#define GPIO_PORTA_DEBOUNCE 0x48 #define GPIO_PORTA_EOI 0x4c #define GPIO_EXT_PORTA 0x50 #define GPIO_EXT_PORTB 0x54 @@ -64,6 +65,12 @@ struct dwapb_gpio { struct irq_domain *domain; }; +static inline struct dwapb_gpio_port * +to_dwapb_gpio_port(struct bgpio_chip *bgc) +{ + return container_of(bgc, struct dwapb_gpio_port, bgc); +} + static inline u32 dwapb_read(struct dwapb_gpio *gpio, unsigned int offset) { struct bgpio_chip *bgc = &gpio->ports[0].bgc; @@ -84,8 +91,7 @@ static inline void dwapb_write(struct dwapb_gpio *gpio, unsigned int offset, static int dwapb_gpio_to_irq(struct gpio_chip *gc, unsigned offset) { struct bgpio_chip *bgc = to_bgpio_chip(gc); - struct dwapb_gpio_port *port = container_of(bgc, struct - dwapb_gpio_port, bgc); + struct dwapb_gpio_port *port = to_dwapb_gpio_port(bgc); struct dwapb_gpio *gpio = port->gpio; return irq_find_mapping(gpio->domain, offset); @@ -235,6 +241,28 @@ static int dwapb_irq_set_type(struct irq_data *d, u32 type) return 0; } +static int dwapb_gpio_set_debounce(struct gpio_chip *gc, + unsigned offset, unsigned debounce) +{ + struct bgpio_chip *bgc = to_bgpio_chip(gc); + struct dwapb_gpio_port *port = to_dwapb_gpio_port(bgc); + struct dwapb_gpio *gpio = port->gpio; + unsigned long flags, val_deb; + unsigned long mask = bgc->pin2mask(bgc, offset); + + spin_lock_irqsave(&bgc->lock, flags); + + val_deb = dwapb_read(gpio, GPIO_PORTA_DEBOUNCE); + if (debounce) + dwapb_write(gpio, GPIO_PORTA_DEBOUNCE, val_deb | mask); + else + dwapb_write(gpio, GPIO_PORTA_DEBOUNCE, val_deb & ~mask); + + spin_unlock_irqrestore(&bgc->lock, flags); + + return 0; +} + static irqreturn_t dwapb_irq_handler_mfd(int irq, void *dev_id) { u32 worked; @@ -373,6 +401,10 @@ static int dwapb_gpio_add_port(struct dwapb_gpio *gpio, port->bgc.gc.ngpio = pp->ngpio; port->bgc.gc.base = pp->gpio_base; + /* Only port A support debounce */ + if (pp->idx == 0) + port->bgc.gc.set_debounce = dwapb_gpio_set_debounce; + if (pp->irq) dwapb_configure_irqs(gpio, port, pp); -- cgit From 1e960dbb7b12886d2095df05adf8754eef1c26d0 Mon Sep 17 00:00:00 2001 From: Weike Chen Date: Wed, 17 Sep 2014 09:18:42 -0700 Subject: GPIO: gpio-dwapb: Suspend & Resume PM enabling This patch enables suspend and resume mode for the power management, and it is based on Josef Ahmad's previous work. Reviewed-by: Hock Leong Kweh Reviewed-by: Andy Shevchenko Signed-off-by: Weike Chen Signed-off-by: Linus Walleij --- drivers/gpio/gpio-dwapb.c | 115 ++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 115 insertions(+) (limited to 'drivers') diff --git a/drivers/gpio/gpio-dwapb.c b/drivers/gpio/gpio-dwapb.c index db059bb8edc3..7feaf9d3f3ca 100644 --- a/drivers/gpio/gpio-dwapb.c +++ b/drivers/gpio/gpio-dwapb.c @@ -51,10 +51,28 @@ struct dwapb_gpio; +#ifdef CONFIG_PM_SLEEP +/* Store GPIO context across system-wide suspend/resume transitions */ +struct dwapb_context { + u32 data; + u32 dir; + u32 ext; + u32 int_en; + u32 int_mask; + u32 int_type; + u32 int_pol; + u32 int_deb; +}; +#endif + struct dwapb_gpio_port { struct bgpio_chip bgc; bool is_registered; struct dwapb_gpio *gpio; +#ifdef CONFIG_PM_SLEEP + struct dwapb_context *ctx; +#endif + unsigned int idx; }; struct dwapb_gpio { @@ -381,6 +399,13 @@ static int dwapb_gpio_add_port(struct dwapb_gpio *gpio, port = &gpio->ports[offs]; port->gpio = gpio; + port->idx = pp->idx; + +#ifdef CONFIG_PM_SLEEP + port->ctx = devm_kzalloc(gpio->dev, sizeof(*port->ctx), GFP_KERNEL); + if (!port->ctx) + return -ENOMEM; +#endif dat = gpio->regs + GPIO_EXT_PORTA + (pp->idx * GPIO_EXT_PORT_SIZE); set = gpio->regs + GPIO_SWPORTA_DR + (pp->idx * GPIO_SWPORT_DR_SIZE); @@ -586,10 +611,100 @@ static const struct of_device_id dwapb_of_match[] = { }; MODULE_DEVICE_TABLE(of, dwapb_of_match); +#ifdef CONFIG_PM_SLEEP +static int dwapb_gpio_suspend(struct device *dev) +{ + struct platform_device *pdev = to_platform_device(dev); + struct dwapb_gpio *gpio = platform_get_drvdata(pdev); + struct bgpio_chip *bgc = &gpio->ports[0].bgc; + unsigned long flags; + int i; + + spin_lock_irqsave(&bgc->lock, flags); + for (i = 0; i < gpio->nr_ports; i++) { + unsigned int offset; + unsigned int idx = gpio->ports[i].idx; + struct dwapb_context *ctx = gpio->ports[i].ctx; + + BUG_ON(ctx == 0); + + offset = GPIO_SWPORTA_DDR + idx * GPIO_SWPORT_DDR_SIZE; + ctx->dir = dwapb_read(gpio, offset); + + offset = GPIO_SWPORTA_DR + idx * GPIO_SWPORT_DR_SIZE; + ctx->data = dwapb_read(gpio, offset); + + offset = GPIO_EXT_PORTA + idx * GPIO_EXT_PORT_SIZE; + ctx->ext = dwapb_read(gpio, offset); + + /* Only port A can provide interrupts */ + if (idx == 0) { + ctx->int_mask = dwapb_read(gpio, GPIO_INTMASK); + ctx->int_en = dwapb_read(gpio, GPIO_INTEN); + ctx->int_pol = dwapb_read(gpio, GPIO_INT_POLARITY); + ctx->int_type = dwapb_read(gpio, GPIO_INTTYPE_LEVEL); + ctx->int_deb = dwapb_read(gpio, GPIO_PORTA_DEBOUNCE); + + /* Mask out interrupts */ + dwapb_write(gpio, GPIO_INTMASK, 0xffffffff); + } + } + spin_unlock_irqrestore(&bgc->lock, flags); + + return 0; +} + +static int dwapb_gpio_resume(struct device *dev) +{ + struct platform_device *pdev = to_platform_device(dev); + struct dwapb_gpio *gpio = platform_get_drvdata(pdev); + struct bgpio_chip *bgc = &gpio->ports[0].bgc; + unsigned long flags; + int i; + + spin_lock_irqsave(&bgc->lock, flags); + for (i = 0; i < gpio->nr_ports; i++) { + unsigned int offset; + unsigned int idx = gpio->ports[i].idx; + struct dwapb_context *ctx = gpio->ports[i].ctx; + + BUG_ON(ctx == 0); + + offset = GPIO_SWPORTA_DR + idx * GPIO_SWPORT_DR_SIZE; + dwapb_write(gpio, offset, ctx->data); + + offset = GPIO_SWPORTA_DDR + idx * GPIO_SWPORT_DDR_SIZE; + dwapb_write(gpio, offset, ctx->dir); + + offset = GPIO_EXT_PORTA + idx * GPIO_EXT_PORT_SIZE; + dwapb_write(gpio, offset, ctx->ext); + + /* Only port A can provide interrupts */ + if (idx == 0) { + dwapb_write(gpio, GPIO_INTTYPE_LEVEL, ctx->int_type); + dwapb_write(gpio, GPIO_INT_POLARITY, ctx->int_pol); + dwapb_write(gpio, GPIO_PORTA_DEBOUNCE, ctx->int_deb); + dwapb_write(gpio, GPIO_INTEN, ctx->int_en); + dwapb_write(gpio, GPIO_INTMASK, ctx->int_mask); + + /* Clear out spurious interrupts */ + dwapb_write(gpio, GPIO_PORTA_EOI, 0xffffffff); + } + } + spin_unlock_irqrestore(&bgc->lock, flags); + + return 0; +} +#endif + +static SIMPLE_DEV_PM_OPS(dwapb_gpio_pm_ops, dwapb_gpio_suspend, + dwapb_gpio_resume); + static struct platform_driver dwapb_gpio_driver = { .driver = { .name = "gpio-dwapb", .owner = THIS_MODULE, + .pm = &dwapb_gpio_pm_ops, .of_match_table = of_match_ptr(dwapb_of_match), }, .probe = dwapb_gpio_probe, -- cgit From 56b427678cc3c1c4e305a96c9cfa8ba985c70a48 Mon Sep 17 00:00:00 2001 From: Fabian Frederick Date: Sun, 14 Sep 2014 15:56:55 +0200 Subject: gpio: use container_of to resolve cs5535_gpio_chip from gpio_chip Use container_of instead of casting first structure member. Signed-off-by: Fabian Frederick Signed-off-by: Linus Walleij --- drivers/gpio/gpio-cs5535.c | 9 ++++++--- 1 file changed, 6 insertions(+), 3 deletions(-) (limited to 'drivers') diff --git a/drivers/gpio/gpio-cs5535.c b/drivers/gpio/gpio-cs5535.c index 92ec58fa9236..668127fe90ef 100644 --- a/drivers/gpio/gpio-cs5535.c +++ b/drivers/gpio/gpio-cs5535.c @@ -201,7 +201,8 @@ EXPORT_SYMBOL_GPL(cs5535_gpio_setup_event); static int chip_gpio_request(struct gpio_chip *c, unsigned offset) { - struct cs5535_gpio_chip *chip = (struct cs5535_gpio_chip *) c; + struct cs5535_gpio_chip *chip = + container_of(c, struct cs5535_gpio_chip, chip); unsigned long flags; spin_lock_irqsave(&chip->lock, flags); @@ -241,7 +242,8 @@ static void chip_gpio_set(struct gpio_chip *chip, unsigned offset, int val) static int chip_direction_input(struct gpio_chip *c, unsigned offset) { - struct cs5535_gpio_chip *chip = (struct cs5535_gpio_chip *) c; + struct cs5535_gpio_chip *chip = + container_of(c, struct cs5535_gpio_chip, chip); unsigned long flags; spin_lock_irqsave(&chip->lock, flags); @@ -254,7 +256,8 @@ static int chip_direction_input(struct gpio_chip *c, unsigned offset) static int chip_direction_output(struct gpio_chip *c, unsigned offset, int val) { - struct cs5535_gpio_chip *chip = (struct cs5535_gpio_chip *) c; + struct cs5535_gpio_chip *chip = + container_of(c, struct cs5535_gpio_chip, chip); unsigned long flags; spin_lock_irqsave(&chip->lock, flags); -- cgit From 9afd23b61221a5c5c0d588f6d8f0e4495ecc8d24 Mon Sep 17 00:00:00 2001 From: Paul Bolle Date: Tue, 23 Sep 2014 17:40:45 +0200 Subject: gpio: samsung: Remove remaining check for CONFIG_S5P_GPIO_DRVSTR Commit d78c16ccde96 ("ARM: SAMSUNG: Remove remaining legacy code") removed the Kconfig symbol S5P_GPIO_DRVSTR. It didn't remove one check for the related macro. Remove that check and the dead code it hides. Signed-off-by: Paul Bolle Reviewed-by: Tomasz Figa Signed-off-by: Linus Walleij --- drivers/gpio/gpio-samsung.c | 50 --------------------------------------------- 1 file changed, 50 deletions(-) (limited to 'drivers') diff --git a/drivers/gpio/gpio-samsung.c b/drivers/gpio/gpio-samsung.c index 3810da47043f..7c288ba4dc87 100644 --- a/drivers/gpio/gpio-samsung.c +++ b/drivers/gpio/gpio-samsung.c @@ -1309,56 +1309,6 @@ samsung_gpio_pull_t s3c_gpio_getpull(unsigned int pin) } EXPORT_SYMBOL(s3c_gpio_getpull); -#ifdef CONFIG_S5P_GPIO_DRVSTR -s5p_gpio_drvstr_t s5p_gpio_get_drvstr(unsigned int pin) -{ - struct samsung_gpio_chip *chip = samsung_gpiolib_getchip(pin); - unsigned int off; - void __iomem *reg; - int shift; - u32 drvstr; - - if (!chip) - return -EINVAL; - - off = pin - chip->chip.base; - shift = off * 2; - reg = chip->base + 0x0C; - - drvstr = __raw_readl(reg); - drvstr = drvstr >> shift; - drvstr &= 0x3; - - return (__force s5p_gpio_drvstr_t)drvstr; -} -EXPORT_SYMBOL(s5p_gpio_get_drvstr); - -int s5p_gpio_set_drvstr(unsigned int pin, s5p_gpio_drvstr_t drvstr) -{ - struct samsung_gpio_chip *chip = samsung_gpiolib_getchip(pin); - unsigned int off; - void __iomem *reg; - int shift; - u32 tmp; - - if (!chip) - return -EINVAL; - - off = pin - chip->chip.base; - shift = off * 2; - reg = chip->base + 0x0C; - - tmp = __raw_readl(reg); - tmp &= ~(0x3 << shift); - tmp |= drvstr << shift; - - __raw_writel(tmp, reg); - - return 0; -} -EXPORT_SYMBOL(s5p_gpio_set_drvstr); -#endif /* CONFIG_S5P_GPIO_DRVSTR */ - #ifdef CONFIG_PLAT_S3C24XX unsigned int s3c2410_modify_misccr(unsigned int clear, unsigned int change) { -- cgit From 46824e224490af1e6d70fe613930a52253ea969d Mon Sep 17 00:00:00 2001 From: Nishanth Menon Date: Fri, 5 Sep 2014 14:52:55 -0500 Subject: gpio: omap: Fix interrupt names When viewing the /proc/interrupts, there is no information about which GPIO bank a specific gpio interrupt is hooked on to. This is more than a bit irritating as such information can esily be provided back to the user and at times, can be crucial for debug. So, instead of displaying something like: 31: 0 0 GPIO 0 palmas 32: 0 0 GPIO 27 mmc0 Display the following with appropriate device name: 31: 0 0 4ae10000.gpio 0 palmas 32: 0 0 4805d000.gpio 27 mmc0 This requires that we create irq_chip instance specific for each GPIO bank which is trivial to achieve. Signed-off-by: Nishanth Menon Acked-by: Santosh Shilimkar Acked-by: Javier Martinez Canillas Acked-by: Kevin Hilman Acked-by: Alexandre Courbot Signed-off-by: Linus Walleij --- drivers/gpio/gpio-omap.c | 31 +++++++++++++++++-------------- 1 file changed, 17 insertions(+), 14 deletions(-) (limited to 'drivers') diff --git a/drivers/gpio/gpio-omap.c b/drivers/gpio/gpio-omap.c index 5cd33677a018..415682f69214 100644 --- a/drivers/gpio/gpio-omap.c +++ b/drivers/gpio/gpio-omap.c @@ -857,16 +857,6 @@ static void omap_gpio_unmask_irq(struct irq_data *d) spin_unlock_irqrestore(&bank->lock, flags); } -static struct irq_chip gpio_irq_chip = { - .name = "GPIO", - .irq_shutdown = omap_gpio_irq_shutdown, - .irq_ack = omap_gpio_ack_irq, - .irq_mask = omap_gpio_mask_irq, - .irq_unmask = omap_gpio_unmask_irq, - .irq_set_type = omap_gpio_irq_type, - .irq_set_wake = omap_gpio_wake_enable, -}; - /*---------------------------------------------------------------------*/ static int omap_mpuio_suspend_noirq(struct device *dev) @@ -1088,7 +1078,7 @@ omap_mpuio_alloc_gc(struct gpio_bank *bank, unsigned int irq_start, IRQ_NOREQUEST | IRQ_NOPROBE, 0); } -static int omap_gpio_chip_init(struct gpio_bank *bank) +static int omap_gpio_chip_init(struct gpio_bank *bank, struct irq_chip *irqc) { int j; static int gpio; @@ -1137,7 +1127,7 @@ static int omap_gpio_chip_init(struct gpio_bank *bank) } #endif - ret = gpiochip_irqchip_add(&bank->chip, &gpio_irq_chip, + ret = gpiochip_irqchip_add(&bank->chip, irqc, irq_base, omap_gpio_irq_handler, IRQ_TYPE_NONE); @@ -1147,7 +1137,7 @@ static int omap_gpio_chip_init(struct gpio_bank *bank) return -ENODEV; } - gpiochip_set_chained_irqchip(&bank->chip, &gpio_irq_chip, + gpiochip_set_chained_irqchip(&bank->chip, irqc, bank->irq, omap_gpio_irq_handler); for (j = 0; j < bank->width; j++) { @@ -1172,6 +1162,7 @@ static int omap_gpio_probe(struct platform_device *pdev) const struct omap_gpio_platform_data *pdata; struct resource *res; struct gpio_bank *bank; + struct irq_chip *irqc; int ret; match = of_match_device(of_match_ptr(omap_gpio_match), dev); @@ -1186,6 +1177,18 @@ static int omap_gpio_probe(struct platform_device *pdev) return -ENOMEM; } + irqc = devm_kzalloc(dev, sizeof(*irqc), GFP_KERNEL); + if (!irqc) + return -ENOMEM; + + irqc->irq_shutdown = omap_gpio_irq_shutdown, + irqc->irq_ack = omap_gpio_ack_irq, + irqc->irq_mask = omap_gpio_mask_irq, + irqc->irq_unmask = omap_gpio_unmask_irq, + irqc->irq_set_type = omap_gpio_irq_type, + irqc->irq_set_wake = omap_gpio_wake_enable, + irqc->name = dev_name(&pdev->dev); + res = platform_get_resource(pdev, IORESOURCE_IRQ, 0); if (unlikely(!res)) { dev_err(dev, "Invalid IRQ resource\n"); @@ -1241,7 +1244,7 @@ static int omap_gpio_probe(struct platform_device *pdev) omap_gpio_mod_init(bank); - ret = omap_gpio_chip_init(bank); + ret = omap_gpio_chip_init(bank, irqc); if (ret) return ret; -- cgit From 43a8785aeedc3eb1ffce95d46a8e7ca3e0d591d8 Mon Sep 17 00:00:00 2001 From: Alexander Shiyan Date: Fri, 19 Sep 2014 11:39:25 +0400 Subject: GPIO: gpiolib: trivial: Add missing carriage return Signed-off-by: Alexander Shiyan Signed-off-by: Linus Walleij --- drivers/gpio/gpiolib.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'drivers') diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c index bf1bb795f100..4acf8b2e9226 100644 --- a/drivers/gpio/gpiolib.c +++ b/drivers/gpio/gpiolib.c @@ -1652,7 +1652,7 @@ struct gpio_desc *__must_check __gpiod_get_index(struct device *dev, * a result. In that case, use platform lookup as a fallback. */ if (!desc || desc == ERR_PTR(-ENOENT)) { - dev_dbg(dev, "using lookup tables for GPIO lookup"); + dev_dbg(dev, "using lookup tables for GPIO lookup\n"); desc = gpiod_find(dev, con_id, idx, &lookupflags); } -- cgit From 4f51b91335a63b2672a0f21fd13a684c8e35c4e8 Mon Sep 17 00:00:00 2001 From: Wei Yongjun Date: Fri, 12 Sep 2014 07:12:14 +0800 Subject: gpio: Fix return value check in xgene_gpio_probe() In case of error, the function devm_ioremap_nocache() returns NULL pointer not ERR_PTR(). The IS_ERR() test in the return value check should be replaced with NULL test. Signed-off-by: Wei Yongjun Reviewed-by: Alexandre Courbot Signed-off-by: Linus Walleij --- drivers/gpio/gpio-xgene.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'drivers') diff --git a/drivers/gpio/gpio-xgene.c b/drivers/gpio/gpio-xgene.c index f1944d496c3b..150e7f1c5ae8 100644 --- a/drivers/gpio/gpio-xgene.c +++ b/drivers/gpio/gpio-xgene.c @@ -182,8 +182,8 @@ static int xgene_gpio_probe(struct platform_device *pdev) res = platform_get_resource(pdev, IORESOURCE_MEM, 0); gpio->base = devm_ioremap_nocache(&pdev->dev, res->start, resource_size(res)); - if (IS_ERR(gpio->base)) { - err = PTR_ERR(gpio->base); + if (!gpio->base) { + err = -ENOMEM; goto err; } -- cgit From 295494af0695bc190e6b939df1036af898c2856f Mon Sep 17 00:00:00 2001 From: Octavian Purdila Date: Fri, 19 Sep 2014 23:22:44 +0300 Subject: gpiolib: add irq_not_threaded flag to gpio_chip Some GPIO chips (e.g. the DLN2 USB adapter) have blocking get/set operation but do not need a threaded irq handler. Signed-off-by: Octavian Purdila Signed-off-by: Linus Walleij --- drivers/gpio/gpiolib.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'drivers') diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c index 4acf8b2e9226..6fdae789ccc9 100644 --- a/drivers/gpio/gpiolib.c +++ b/drivers/gpio/gpiolib.c @@ -437,7 +437,7 @@ static int gpiochip_irq_map(struct irq_domain *d, unsigned int irq, irq_set_lockdep_class(irq, &gpiochip_irq_lock_class); irq_set_chip_and_handler(irq, chip->irqchip, chip->irq_handler); /* Chips that can sleep need nested thread handlers */ - if (chip->can_sleep) + if (chip->can_sleep && !chip->irq_not_threaded) irq_set_nested_thread(irq, 1); #ifdef CONFIG_ARM set_irq_flags(irq, IRQF_VALID); -- cgit From 0397375dc936142fa0b96b525064306f4c2e312d Mon Sep 17 00:00:00 2001 From: Varka Bhadram Date: Sat, 20 Sep 2014 20:44:30 +0530 Subject: gpio: ks8695: fix switch case indentation Signed-off-by: Varka Bhadram Signed-off-by: Linus Walleij --- drivers/gpio/gpio-ks8695.c | 20 ++++++++++---------- 1 file changed, 10 insertions(+), 10 deletions(-) (limited to 'drivers') diff --git a/drivers/gpio/gpio-ks8695.c b/drivers/gpio/gpio-ks8695.c index 464a83de0d6a..ba2d2f1fb828 100644 --- a/drivers/gpio/gpio-ks8695.c +++ b/drivers/gpio/gpio-ks8695.c @@ -265,16 +265,16 @@ static int ks8695_gpio_show(struct seq_file *s, void *unused) seq_printf(s, "EXT%i ", i); switch ((ctrl & intmask[i]) >> (4 * i)) { - case IOPC_TM_LOW: - seq_printf(s, "(Low)"); break; - case IOPC_TM_HIGH: - seq_printf(s, "(High)"); break; - case IOPC_TM_RISING: - seq_printf(s, "(Rising)"); break; - case IOPC_TM_FALLING: - seq_printf(s, "(Falling)"); break; - case IOPC_TM_EDGE: - seq_printf(s, "(Edges)"); break; + case IOPC_TM_LOW: + seq_printf(s, "(Low)"); break; + case IOPC_TM_HIGH: + seq_printf(s, "(High)"); break; + case IOPC_TM_RISING: + seq_printf(s, "(Rising)"); break; + case IOPC_TM_FALLING: + seq_printf(s, "(Falling)"); break; + case IOPC_TM_EDGE: + seq_printf(s, "(Edges)"); break; } } else -- cgit From 1a19864e3bc2715e95940c7ec89f75c77030ccb5 Mon Sep 17 00:00:00 2001 From: Axel Lin Date: Sun, 21 Sep 2014 12:31:29 +0800 Subject: gpio: xgene: Fix missing spin_lock_init() Signed-off-by: Axel Lin Signed-off-by: Linus Walleij --- drivers/gpio/gpio-xgene.c | 1 + 1 file changed, 1 insertion(+) (limited to 'drivers') diff --git a/drivers/gpio/gpio-xgene.c b/drivers/gpio/gpio-xgene.c index 150e7f1c5ae8..35104fd06bb9 100644 --- a/drivers/gpio/gpio-xgene.c +++ b/drivers/gpio/gpio-xgene.c @@ -189,6 +189,7 @@ static int xgene_gpio_probe(struct platform_device *pdev) gpio->chip.ngpio = XGENE_MAX_GPIOS; + spin_lock_init(&gpio->lock); gpio->chip.dev = &pdev->dev; gpio->chip.direction_input = xgene_gpio_dir_in; gpio->chip.direction_output = xgene_gpio_dir_out; -- cgit From 02ed185af0c146b479e5c62f9aeff975672f1d2f Mon Sep 17 00:00:00 2001 From: Axel Lin Date: Sun, 21 Sep 2014 12:32:10 +0800 Subject: gpio: xgene: Remove unneeded forward declation for struct xgene_gpio Signed-off-by: Axel Lin Signed-off-by: Linus Walleij --- drivers/gpio/gpio-xgene.c | 2 -- 1 file changed, 2 deletions(-) (limited to 'drivers') diff --git a/drivers/gpio/gpio-xgene.c b/drivers/gpio/gpio-xgene.c index 35104fd06bb9..5fcdac409fef 100644 --- a/drivers/gpio/gpio-xgene.c +++ b/drivers/gpio/gpio-xgene.c @@ -38,8 +38,6 @@ #define GPIO_BIT_OFFSET(x) (x % XGENE_GPIOS_PER_BANK) #define GPIO_BANK_OFFSET(x) ((x / XGENE_GPIOS_PER_BANK) * GPIO_BANK_STRIDE) -struct xgene_gpio; - struct xgene_gpio { struct gpio_chip chip; void __iomem *base; -- cgit From 513d3c0f40c8e22fac019d5b0694374d17fbe682 Mon Sep 17 00:00:00 2001 From: Axel Lin Date: Sun, 21 Sep 2014 12:32:59 +0800 Subject: gpio: xgene: Remove unneeded #ifdef CONFIG_OF guard This driver depends on OF_GPIO, so it won't be built if !CONFIG_OF. Signed-off-by: Axel Lin Signed-off-by: Linus Walleij --- drivers/gpio/gpio-xgene.c | 2 -- 1 file changed, 2 deletions(-) (limited to 'drivers') diff --git a/drivers/gpio/gpio-xgene.c b/drivers/gpio/gpio-xgene.c index 5fcdac409fef..7d489221dc1f 100644 --- a/drivers/gpio/gpio-xgene.c +++ b/drivers/gpio/gpio-xgene.c @@ -220,13 +220,11 @@ static int xgene_gpio_remove(struct platform_device *pdev) return 0; } -#ifdef CONFIG_OF static const struct of_device_id xgene_gpio_of_match[] = { { .compatible = "apm,xgene-gpio", }, {}, }; MODULE_DEVICE_TABLE(of, xgene_gpio_of_match); -#endif static struct platform_driver xgene_gpio_driver = { .driver = { -- cgit From 58a3b92d33d289e2f3390b40a2c5cfd7f32cfe7a Mon Sep 17 00:00:00 2001 From: Linus Walleij Date: Wed, 24 Sep 2014 13:30:24 +0200 Subject: gpio: dwapb: fix pointer to integer cast The statements BUG_ON(ctx == 0) was implicitly casting a pointer to an integer for comparison. Do this with a bool test instead to get away from sparse warnings. Signed-off-by: Linus Walleij --- drivers/gpio/gpio-dwapb.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'drivers') diff --git a/drivers/gpio/gpio-dwapb.c b/drivers/gpio/gpio-dwapb.c index 7feaf9d3f3ca..b43cd84b61f1 100644 --- a/drivers/gpio/gpio-dwapb.c +++ b/drivers/gpio/gpio-dwapb.c @@ -626,7 +626,7 @@ static int dwapb_gpio_suspend(struct device *dev) unsigned int idx = gpio->ports[i].idx; struct dwapb_context *ctx = gpio->ports[i].ctx; - BUG_ON(ctx == 0); + BUG_ON(!ctx); offset = GPIO_SWPORTA_DDR + idx * GPIO_SWPORT_DDR_SIZE; ctx->dir = dwapb_read(gpio, offset); @@ -668,7 +668,7 @@ static int dwapb_gpio_resume(struct device *dev) unsigned int idx = gpio->ports[i].idx; struct dwapb_context *ctx = gpio->ports[i].ctx; - BUG_ON(ctx == 0); + BUG_ON(!ctx); offset = GPIO_SWPORTA_DR + idx * GPIO_SWPORT_DR_SIZE; dwapb_write(gpio, offset, ctx->data); -- cgit From 1b4c5a6e6b73b082170bfcbf1ff3e2fcf2e7530c Mon Sep 17 00:00:00 2001 From: Gernot Vormayr Date: Wed, 24 Sep 2014 00:58:45 +0200 Subject: gpio: Fix ngpio in gpio-xilinx driver If one adds gpio-controller; to the chip in the devicetree, then initialization fails with 'gpiochip_find_base: cannot find free range', because ngpio is 0. This patch fixes the bug. This version includes the suggestions from Linus Walleij. Tested on ml507 board. Signed-off-by: Gernot Vormayr Signed-off-by: Linus Walleij --- drivers/gpio/gpio-xilinx.c | 27 +++++++++++++++------------ 1 file changed, 15 insertions(+), 12 deletions(-) (limited to 'drivers') diff --git a/drivers/gpio/gpio-xilinx.c b/drivers/gpio/gpio-xilinx.c index 12481867daf1..ba18b06c9a21 100644 --- a/drivers/gpio/gpio-xilinx.c +++ b/drivers/gpio/gpio-xilinx.c @@ -197,6 +197,7 @@ static int xgpio_of_probe(struct device_node *np) struct xgpio_instance *chip; int status = 0; const u32 *tree_info; + u32 ngpio; chip = kzalloc(sizeof(*chip), GFP_KERNEL); if (!chip) @@ -211,12 +212,13 @@ static int xgpio_of_probe(struct device_node *np) /* Update GPIO direction shadow register with default value */ of_property_read_u32(np, "xlnx,tri-default", &chip->gpio_dir); - /* By default assume full GPIO controller */ - chip->mmchip.gc.ngpio = 32; - - /* Check device node and parent device node for device width */ - of_property_read_u32(np, "xlnx,gpio-width", - (u32 *)&chip->mmchip.gc.ngpio); + /* + * Check device node and parent device node for device width + * and assume default width of 32 + */ + if (of_property_read_u32(np, "xlnx,gpio-width", &ngpio)) + ngpio = 32; + chip->mmchip.gc.ngpio = (u16)ngpio; spin_lock_init(&chip->gpio_lock); @@ -258,12 +260,13 @@ static int xgpio_of_probe(struct device_node *np) /* Update GPIO direction shadow register with default value */ of_property_read_u32(np, "xlnx,tri-default-2", &chip->gpio_dir); - /* By default assume full GPIO controller */ - chip->mmchip.gc.ngpio = 32; - - /* Check device node and parent device node for device width */ - of_property_read_u32(np, "xlnx,gpio2-width", - (u32 *)&chip->mmchip.gc.ngpio); + /* + * Check device node and parent device node for device width + * and assume default width of 32 + */ + if (of_property_read_u32(np, "xlnx,gpio2-width", &ngpio)) + ngpio = 32; + chip->mmchip.gc.ngpio = (u16)ngpio; spin_lock_init(&chip->gpio_lock); -- cgit From 3778129206419c41f0dac877d931900397cab25c Mon Sep 17 00:00:00 2001 From: Behan Webster Date: Tue, 23 Sep 2014 15:55:07 -0700 Subject: gpio, bcm-kona, LLVMLinux: Remove use of __initconst The __initconst is in the wrong place, and when moved to the correct place it uncovers an error where the variable is used by non-init data structures. Instead merely make them const and put the const in the right spot. Signed-off-by: Behan Webster Reviewed-by: Mark Charlebois Acked-by: Arnd Bergmann Acked-by: Matt Porter Signed-off-by: Linus Walleij --- drivers/gpio/gpio-bcm-kona.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'drivers') diff --git a/drivers/gpio/gpio-bcm-kona.c b/drivers/gpio/gpio-bcm-kona.c index 3f6b33ce9bd4..de0801e9767a 100644 --- a/drivers/gpio/gpio-bcm-kona.c +++ b/drivers/gpio/gpio-bcm-kona.c @@ -496,7 +496,7 @@ static struct irq_chip bcm_gpio_irq_chip = { .irq_release_resources = bcm_kona_gpio_irq_relres, }; -static struct __initconst of_device_id bcm_kona_gpio_of_match[] = { +static struct of_device_id const bcm_kona_gpio_of_match[] = { { .compatible = "brcm,kona-gpio" }, {} }; -- cgit From 7b31997a734cd24c305d5c58a366e4c8f7673e02 Mon Sep 17 00:00:00 2001 From: Uwe Kleine-König Date: Fri, 21 Feb 2014 14:42:26 +0100 Subject: gpio: kona: enable only on BCM_MOBILE or for compile testing MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit This change makes it easier to configure a kernel for a real machine by not showing the option to enable it at all if COMPILE_TEST is off. Signed-off-by: Uwe Kleine-König Acked-by: Markus Mayer Signed-off-by: Linus Walleij --- drivers/gpio/Kconfig | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'drivers') diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig index d9ffb6dfa54b..0959ca9b6b27 100644 --- a/drivers/gpio/Kconfig +++ b/drivers/gpio/Kconfig @@ -888,7 +888,7 @@ config GPIO_MSIC config GPIO_BCM_KONA bool "Broadcom Kona GPIO" - depends on OF_GPIO + depends on OF_GPIO && (ARCH_BCM_MOBILE || COMPILE_TEST) help Turn on GPIO support for Broadcom "Kona" chips. -- cgit From e4742d5769e7f502f1b928b759ddecabf03375d7 Mon Sep 17 00:00:00 2001 From: Uwe Kleine-König Date: Wed, 24 Sep 2014 10:15:24 +0200 Subject: pinctrl: bcm281xx: make Kconfig dependency more strict MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit This driver is only useful on BCM281xx, so let the driver depend on ARCH_BCM_MOBILE but allow compile coverage testing. The main benefit is that the driver isn't available to be selected for machines that don't have the matching hardware. Signed-off-by: Uwe Kleine-König Reviewed-by: Sherman Yin Signed-off-by: Linus Walleij --- drivers/pinctrl/Kconfig | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'drivers') diff --git a/drivers/pinctrl/Kconfig b/drivers/pinctrl/Kconfig index bfd2c2e9f6cd..a95d5ca6d830 100644 --- a/drivers/pinctrl/Kconfig +++ b/drivers/pinctrl/Kconfig @@ -86,7 +86,7 @@ config PINCTRL_BCM2835 config PINCTRL_BCM281XX bool "Broadcom BCM281xx pinctrl driver" - depends on OF + depends on OF && (ARCH_BCM_MOBILE || COMPILE_TEST) select PINMUX select PINCONF select GENERIC_PINCONF -- cgit From dcdc3018d6357c35eae7d80b323e10bd72253cb7 Mon Sep 17 00:00:00 2001 From: Aaron Lu Date: Thu, 25 Sep 2014 10:57:26 +0800 Subject: gpio: crystalcove: support virtual GPIO The virtual GPIO introduced in ACPI table of Baytrail-T based system is used to solve a problem under Windows. We do not have such problems under Linux so we do not actually need them. But we have to tell GPIO library that the Crystal Cove GPIO chip has this many GPIO pins or the common GPIO handler will refuse any access to those high number GPIO pins, which will resulted in a failure evaluation of every ACPI control method that is used to turn on/off power resource and/or report sensor temperatures. Signed-off-by: Aaron Lu Reviewed-by: Mika Westerberg [changed vgpio number from 0x5e to 94] Signed-off-by: Linus Walleij --- drivers/gpio/gpio-crystalcove.c | 19 ++++++++++++++++--- 1 file changed, 16 insertions(+), 3 deletions(-) (limited to 'drivers') diff --git a/drivers/gpio/gpio-crystalcove.c b/drivers/gpio/gpio-crystalcove.c index e3712f0e51ab..bbfe7f508502 100644 --- a/drivers/gpio/gpio-crystalcove.c +++ b/drivers/gpio/gpio-crystalcove.c @@ -24,6 +24,7 @@ #include #define CRYSTALCOVE_GPIO_NUM 16 +#define CRYSTALCOVE_VGPIO_NUM 94 #define UPDATE_IRQ_TYPE BIT(0) #define UPDATE_IRQ_MASK BIT(1) @@ -130,6 +131,9 @@ static int crystalcove_gpio_dir_in(struct gpio_chip *chip, unsigned gpio) { struct crystalcove_gpio *cg = to_cg(chip); + if (gpio > CRYSTALCOVE_VGPIO_NUM) + return 0; + return regmap_write(cg->regmap, to_reg(gpio, CTRL_OUT), CTLO_INPUT_SET); } @@ -139,6 +143,9 @@ static int crystalcove_gpio_dir_out(struct gpio_chip *chip, unsigned gpio, { struct crystalcove_gpio *cg = to_cg(chip); + if (gpio > CRYSTALCOVE_VGPIO_NUM) + return 0; + return regmap_write(cg->regmap, to_reg(gpio, CTRL_OUT), CTLO_OUTPUT_SET | value); } @@ -149,6 +156,9 @@ static int crystalcove_gpio_get(struct gpio_chip *chip, unsigned gpio) int ret; unsigned int val; + if (gpio > CRYSTALCOVE_VGPIO_NUM) + return 0; + ret = regmap_read(cg->regmap, to_reg(gpio, CTRL_IN), &val); if (ret) return ret; @@ -161,6 +171,9 @@ static void crystalcove_gpio_set(struct gpio_chip *chip, { struct crystalcove_gpio *cg = to_cg(chip); + if (gpio > CRYSTALCOVE_VGPIO_NUM) + return; + if (value) regmap_update_bits(cg->regmap, to_reg(gpio, CTRL_OUT), 1, 1); else @@ -256,7 +269,7 @@ static irqreturn_t crystalcove_gpio_irq_handler(int irq, void *data) pending = p0 | p1 << 8; - for (gpio = 0; gpio < cg->chip.ngpio; gpio++) { + for (gpio = 0; gpio < CRYSTALCOVE_GPIO_NUM; gpio++) { if (pending & BIT(gpio)) { virq = irq_find_mapping(cg->chip.irqdomain, gpio); generic_handle_irq(virq); @@ -273,7 +286,7 @@ static void crystalcove_gpio_dbg_show(struct seq_file *s, int gpio, offset; unsigned int ctlo, ctli, mirqs0, mirqsx, irq; - for (gpio = 0; gpio < cg->chip.ngpio; gpio++) { + for (gpio = 0; gpio < CRYSTALCOVE_GPIO_NUM; gpio++) { regmap_read(cg->regmap, to_reg(gpio, CTRL_OUT), &ctlo); regmap_read(cg->regmap, to_reg(gpio, CTRL_IN), &ctli); regmap_read(cg->regmap, gpio < 8 ? MGPIO0IRQS0 : MGPIO1IRQS0, @@ -320,7 +333,7 @@ static int crystalcove_gpio_probe(struct platform_device *pdev) cg->chip.get = crystalcove_gpio_get; cg->chip.set = crystalcove_gpio_set; cg->chip.base = -1; - cg->chip.ngpio = CRYSTALCOVE_GPIO_NUM; + cg->chip.ngpio = CRYSTALCOVE_VGPIO_NUM; cg->chip.can_sleep = true; cg->chip.dev = dev; cg->chip.dbg_show = crystalcove_gpio_dbg_show; -- cgit From e3893386b90500d7f26fec3170bf96f67d3e557e Mon Sep 17 00:00:00 2001 From: Grygorii Strashko Date: Thu, 25 Sep 2014 19:09:23 +0300 Subject: gpiolib: irqchip: use irq_find_mapping while removing irqchip There is no guarantee that VIRQs will be allocated sequentially for gpio irqchip in gpiochip_irqchip_add(). Therefore, it's unsafe to dispose VIRQ in gpiochip_irqchip_remove() basing on index relatively to stored irq_base value. Hence, use irq_find_mapping for VIRQ finding in gpiochip_irqchip_remove() instead of irq_base + index. Reported-by: Wang, Yalin Signed-off-by: Grygorii Strashko Signed-off-by: Linus Walleij --- drivers/gpio/gpiolib.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) (limited to 'drivers') diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c index 6fdae789ccc9..550e575c6ffb 100644 --- a/drivers/gpio/gpiolib.c +++ b/drivers/gpio/gpiolib.c @@ -514,7 +514,8 @@ static void gpiochip_irqchip_remove(struct gpio_chip *gpiochip) /* Remove all IRQ mappings and delete the domain */ if (gpiochip->irqdomain) { for (offset = 0; offset < gpiochip->ngpio; offset++) - irq_dispose_mapping(gpiochip->irq_base + offset); + irq_dispose_mapping( + irq_find_mapping(gpiochip->irqdomain, offset)); irq_domain_remove(gpiochip->irqdomain); } -- cgit From 83141a771975f4e54402ab05e5cbbc3c56f45bdd Mon Sep 17 00:00:00 2001 From: Linus Walleij Date: Fri, 26 Sep 2014 13:50:12 +0200 Subject: gpio: set parent irq on chained handlers MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit If the IRQ from the parent is nested the IRQ may need to be resent under certain conditions. Currently the chained IRQ handler in gpiolib does not handle connecting nested IRQs but it is conceptually correct to indicate the actual parent IRQ. Reported-by: Grygorii Strashko Reported-by: Lothar Waßmann Signed-off-by: Linus Walleij --- drivers/gpio/gpiolib.c | 13 +++++++++++++ 1 file changed, 13 insertions(+) (limited to 'drivers') diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c index 550e575c6ffb..9362b5b817af 100644 --- a/drivers/gpio/gpiolib.c +++ b/drivers/gpio/gpiolib.c @@ -398,17 +398,30 @@ void gpiochip_set_chained_irqchip(struct gpio_chip *gpiochip, int parent_irq, irq_flow_handler_t parent_handler) { + unsigned int offset; + if (gpiochip->can_sleep) { chip_err(gpiochip, "you cannot have chained interrupts on a chip that may sleep\n"); return; } + if (!gpiochip->irqdomain) { + chip_err(gpiochip, "called %s before setting up irqchip\n", + __func__); + return; + } irq_set_chained_handler(parent_irq, parent_handler); + /* * The parent irqchip is already using the chip_data for this * irqchip, so our callbacks simply use the handler_data. */ irq_set_handler_data(parent_irq, gpiochip); + + /* Set the parent IRQ for all affected IRQs */ + for (offset = 0; offset < gpiochip->ngpio; offset++) + irq_set_parent(irq_find_mapping(gpiochip->irqdomain, offset), + parent_irq); } EXPORT_SYMBOL_GPL(gpiochip_set_chained_irqchip); -- cgit From 3f97d5fcf99cb87f590ffe1d9422b2a26a8ef3ed Mon Sep 17 00:00:00 2001 From: Linus Walleij Date: Fri, 26 Sep 2014 14:19:52 +0200 Subject: gpio: handle also nested irqchips in the chained handler set-up To unify how we connect cascaded IRQ chips to parent IRQs, if NULL us passed as handler to the gpiochip_set_chained_irqchip() function, assume the chips is nested rather than chained, and we still get the parent set up correctly by way of this function call. Alter the drivers for tc3589x and stmpe to use this to set up their chained handlers as a demonstration of the usage. Signed-off-by: Linus Walleij --- drivers/gpio/gpio-stmpe.c | 18 ++++++++++++------ drivers/gpio/gpio-tc3589x.c | 5 +++++ drivers/gpio/gpiolib.c | 34 +++++++++++++++++++--------------- 3 files changed, 36 insertions(+), 21 deletions(-) (limited to 'drivers') diff --git a/drivers/gpio/gpio-stmpe.c b/drivers/gpio/gpio-stmpe.c index 845025a57240..b0b342787c37 100644 --- a/drivers/gpio/gpio-stmpe.c +++ b/drivers/gpio/gpio-stmpe.c @@ -308,6 +308,12 @@ static int stmpe_gpio_probe(struct platform_device *pdev) if (ret) goto out_free; + ret = gpiochip_add(&stmpe_gpio->chip); + if (ret) { + dev_err(&pdev->dev, "unable to add gpiochip: %d\n", ret); + goto out_disable; + } + if (irq > 0) { ret = devm_request_threaded_irq(&pdev->dev, irq, NULL, stmpe_gpio_irq, IRQF_ONESHOT, @@ -324,14 +330,13 @@ static int stmpe_gpio_probe(struct platform_device *pdev) if (ret) { dev_err(&pdev->dev, "could not connect irqchip to gpiochip\n"); - return ret; + goto out_disable; } - } - ret = gpiochip_add(&stmpe_gpio->chip); - if (ret) { - dev_err(&pdev->dev, "unable to add gpiochip: %d\n", ret); - goto out_disable; + gpiochip_set_chained_irqchip(&stmpe_gpio->chip, + &stmpe_gpio_irq_chip, + irq, + NULL); } if (pdata && pdata->setup) @@ -343,6 +348,7 @@ static int stmpe_gpio_probe(struct platform_device *pdev) out_disable: stmpe_disable(stmpe, STMPE_BLOCK_GPIO); + gpiochip_remove(&stmpe_gpio->chip); out_free: kfree(stmpe_gpio); return ret; diff --git a/drivers/gpio/gpio-tc3589x.c b/drivers/gpio/gpio-tc3589x.c index 7324869c38e0..ae0f6466eb09 100644 --- a/drivers/gpio/gpio-tc3589x.c +++ b/drivers/gpio/gpio-tc3589x.c @@ -300,6 +300,11 @@ static int tc3589x_gpio_probe(struct platform_device *pdev) return ret; } + gpiochip_set_chained_irqchip(&tc3589x_gpio->chip, + &tc3589x_gpio_irq_chip, + irq, + NULL); + if (pdata && pdata->setup) pdata->setup(tc3589x, tc3589x_gpio->chip.base); diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c index 9362b5b817af..6e00c82be142 100644 --- a/drivers/gpio/gpiolib.c +++ b/drivers/gpio/gpiolib.c @@ -385,13 +385,14 @@ static struct gpio_chip *find_chip_by_name(const char *name) */ /** - * gpiochip_add_chained_irqchip() - adds a chained irqchip to a gpiochip - * @gpiochip: the gpiochip to add the irqchip to - * @irqchip: the irqchip to add to the gpiochip + * gpiochip_set_chained_irqchip() - sets a chained irqchip to a gpiochip + * @gpiochip: the gpiochip to set the irqchip chain to + * @irqchip: the irqchip to chain to the gpiochip * @parent_irq: the irq number corresponding to the parent IRQ for this * chained irqchip * @parent_handler: the parent interrupt handler for the accumulated IRQ - * coming out of the gpiochip + * coming out of the gpiochip. If the interrupt is nested rather than + * cascaded, pass NULL in this handler argument */ void gpiochip_set_chained_irqchip(struct gpio_chip *gpiochip, struct irq_chip *irqchip, @@ -400,23 +401,26 @@ void gpiochip_set_chained_irqchip(struct gpio_chip *gpiochip, { unsigned int offset; - if (gpiochip->can_sleep) { - chip_err(gpiochip, "you cannot have chained interrupts on a chip that may sleep\n"); - return; - } if (!gpiochip->irqdomain) { chip_err(gpiochip, "called %s before setting up irqchip\n", __func__); return; } - irq_set_chained_handler(parent_irq, parent_handler); - - /* - * The parent irqchip is already using the chip_data for this - * irqchip, so our callbacks simply use the handler_data. - */ - irq_set_handler_data(parent_irq, gpiochip); + if (parent_handler) { + if (gpiochip->can_sleep) { + chip_err(gpiochip, + "you cannot have chained interrupts on a " + "chip that may sleep\n"); + return; + } + irq_set_chained_handler(parent_irq, parent_handler); + /* + * The parent irqchip is already using the chip_data for this + * irqchip, so our callbacks simply use the handler_data. + */ + irq_set_handler_data(parent_irq, gpiochip); + } /* Set the parent IRQ for all affected IRQs */ for (offset = 0; offset < gpiochip->ngpio; offset++) -- cgit From afdadc06df68861ee7b9ed1699a44516532f545e Mon Sep 17 00:00:00 2001 From: Linus Walleij Date: Tue, 30 Sep 2014 09:11:15 +0200 Subject: gpio: staticize xway_stp_init() This initcall is only called from the driver itself, staticize it. Signed-off-by: Linus Walleij --- drivers/gpio/gpio-stp-xway.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'drivers') diff --git a/drivers/gpio/gpio-stp-xway.c b/drivers/gpio/gpio-stp-xway.c index 04882a911b65..7e359b7cce1b 100644 --- a/drivers/gpio/gpio-stp-xway.c +++ b/drivers/gpio/gpio-stp-xway.c @@ -292,7 +292,7 @@ static struct platform_driver xway_stp_driver = { }, }; -int __init xway_stp_init(void) +static int __init xway_stp_init(void) { return platform_driver_register(&xway_stp_driver); } -- cgit From 1fe3bd9e347bcea63fa8be212001372720968765 Mon Sep 17 00:00:00 2001 From: Linus Walleij Date: Thu, 2 Oct 2014 07:55:27 +0200 Subject: gpio: stmpe: fix up interrupt enable logic The STMPE driver assumes that the passed in IRQ type is for rising or falling IRQs, not both, even though the hardware actually supports this perfectly well. Likewise the check for level IRQs is done against just high or low level types, not for the case where it is combined with other IRQs. Signed-off-by: Linus Walleij --- drivers/gpio/gpio-stmpe.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) (limited to 'drivers') diff --git a/drivers/gpio/gpio-stmpe.c b/drivers/gpio/gpio-stmpe.c index b0b342787c37..866baa879473 100644 --- a/drivers/gpio/gpio-stmpe.c +++ b/drivers/gpio/gpio-stmpe.c @@ -127,19 +127,19 @@ static int stmpe_gpio_irq_set_type(struct irq_data *d, unsigned int type) int regoffset = offset / 8; int mask = 1 << (offset % 8); - if (type == IRQ_TYPE_LEVEL_LOW || type == IRQ_TYPE_LEVEL_HIGH) + if (type & IRQ_TYPE_LEVEL_LOW || type & IRQ_TYPE_LEVEL_HIGH) return -EINVAL; /* STMPE801 doesn't have RE and FE registers */ if (stmpe_gpio->stmpe->partnum == STMPE801) return 0; - if (type == IRQ_TYPE_EDGE_RISING) + if (type & IRQ_TYPE_EDGE_RISING) stmpe_gpio->regs[REG_RE][regoffset] |= mask; else stmpe_gpio->regs[REG_RE][regoffset] &= ~mask; - if (type == IRQ_TYPE_EDGE_FALLING) + if (type & IRQ_TYPE_EDGE_FALLING) stmpe_gpio->regs[REG_FE][regoffset] |= mask; else stmpe_gpio->regs[REG_FE][regoffset] &= ~mask; -- cgit From 27ec8a9cb504e9995c123dc74e0cca0cba81d07f Mon Sep 17 00:00:00 2001 From: Linus Walleij Date: Thu, 2 Oct 2014 07:55:41 +0200 Subject: gpio: stmpe: add verbose debug code To troubleshoot the STMPE GPIO driver, some more detailed debug information giving the exact info on how each pin is used will be helpful. Signed-off-by: Linus Walleij --- drivers/gpio/gpio-stmpe.c | 75 +++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 75 insertions(+) (limited to 'drivers') diff --git a/drivers/gpio/gpio-stmpe.c b/drivers/gpio/gpio-stmpe.c index 866baa879473..85c5b1974294 100644 --- a/drivers/gpio/gpio-stmpe.c +++ b/drivers/gpio/gpio-stmpe.c @@ -13,6 +13,7 @@ #include #include #include +#include /* * These registers are modified under the irq bus lock and cached to avoid @@ -211,6 +212,77 @@ static void stmpe_gpio_irq_unmask(struct irq_data *d) stmpe_gpio->regs[REG_IE][regoffset] |= mask; } +static void stmpe_dbg_show_one(struct seq_file *s, + struct gpio_chip *gc, + unsigned offset, unsigned gpio) +{ + struct stmpe_gpio *stmpe_gpio = to_stmpe_gpio(gc); + struct stmpe *stmpe = stmpe_gpio->stmpe; + const char *label = gpiochip_is_requested(gc, offset); + int num_banks = DIV_ROUND_UP(stmpe->num_gpios, 8); + bool val = !!stmpe_gpio_get(gc, offset); + u8 dir_reg = stmpe->regs[STMPE_IDX_GPDR_LSB] - (offset / 8); + u8 mask = 1 << (offset % 8); + int ret; + u8 dir; + + ret = stmpe_reg_read(stmpe, dir_reg); + if (ret < 0) + return; + dir = !!(ret & mask); + + if (dir) { + seq_printf(s, " gpio-%-3d (%-20.20s) out %s", + gpio, label ?: "(none)", + val ? "hi" : "lo"); + } else { + u8 edge_det_reg = stmpe->regs[STMPE_IDX_GPEDR_MSB] + num_banks - 1 - (offset / 8); + u8 rise_reg = stmpe->regs[STMPE_IDX_GPRER_LSB] - (offset / 8); + u8 fall_reg = stmpe->regs[STMPE_IDX_GPFER_LSB] - (offset / 8); + u8 irqen_reg = stmpe->regs[STMPE_IDX_IEGPIOR_LSB] - (offset / 8); + bool edge_det; + bool rise; + bool fall; + bool irqen; + + ret = stmpe_reg_read(stmpe, edge_det_reg); + if (ret < 0) + return; + edge_det = !!(ret & mask); + ret = stmpe_reg_read(stmpe, rise_reg); + if (ret < 0) + return; + rise = !!(ret & mask); + ret = stmpe_reg_read(stmpe, fall_reg); + if (ret < 0) + return; + fall = !!(ret & mask); + ret = stmpe_reg_read(stmpe, irqen_reg); + if (ret < 0) + return; + irqen = !!(ret & mask); + + seq_printf(s, " gpio-%-3d (%-20.20s) in %s %s %s%s%s", + gpio, label ?: "(none)", + val ? "hi" : "lo", + edge_det ? "edge-asserted" : "edge-inactive", + irqen ? "IRQ-enabled" : "", + rise ? " rising-edge-detection" : "", + fall ? " falling-edge-detection" : ""); + } +} + +static void stmpe_dbg_show(struct seq_file *s, struct gpio_chip *gc) +{ + unsigned i; + unsigned gpio = gc->base; + + for (i = 0; i < gc->ngpio; i++, gpio++) { + stmpe_dbg_show_one(s, gc, i, gpio); + seq_printf(s, "\n"); + } +} + static struct irq_chip stmpe_gpio_irq_chip = { .name = "stmpe-gpio", .irq_bus_lock = stmpe_gpio_irq_lock, @@ -293,6 +365,9 @@ static int stmpe_gpio_probe(struct platform_device *pdev) #endif stmpe_gpio->chip.base = -1; + if (IS_ENABLED(CONFIG_DEBUG_FS)) + stmpe_gpio->chip.dbg_show = stmpe_dbg_show; + if (pdata) stmpe_gpio->norequest_mask = pdata->norequest_mask; else if (np) -- cgit From 36905a33dd2d2bd443079ac677545849fa190eb7 Mon Sep 17 00:00:00 2001 From: Varka Bhadram Date: Sat, 27 Sep 2014 19:05:41 +0530 Subject: gpio: ks8695: fix 'else should follow close brace '}'' Signed-off-by: Varka Bhadram Signed-off-by: Linus Walleij --- drivers/gpio/gpio-ks8695.c | 10 ++++------ 1 file changed, 4 insertions(+), 6 deletions(-) (limited to 'drivers') diff --git a/drivers/gpio/gpio-ks8695.c b/drivers/gpio/gpio-ks8695.c index ba2d2f1fb828..cc09b237e88c 100644 --- a/drivers/gpio/gpio-ks8695.c +++ b/drivers/gpio/gpio-ks8695.c @@ -276,18 +276,16 @@ static int ks8695_gpio_show(struct seq_file *s, void *unused) case IOPC_TM_EDGE: seq_printf(s, "(Edges)"); break; } - } - else + } else seq_printf(s, "GPIO\t"); - } - else if (i <= KS8695_GPIO_5) { + } else if (i <= KS8695_GPIO_5) { if (ctrl & enable[i]) seq_printf(s, "TOUT%i\t", i - KS8695_GPIO_4); else seq_printf(s, "GPIO\t"); - } - else + } else { seq_printf(s, "GPIO\t"); + } seq_printf(s, "\t"); -- cgit From 3a4b094d5d09b8e0d007b2ca3de4f42df3af46e6 Mon Sep 17 00:00:00 2001 From: Linus Walleij Date: Thu, 2 Oct 2014 09:30:43 +0200 Subject: pinctrl: abx500: get rid of unused variable commit 2fcea6cecbc965b4e02a39537d9d939f5251bbbd "pinctrl: remove remaining users of gpiochip_remove() retval" removed the use of the return value from gpiochip_remove() but missed to delete the dangling "err" variable: drivers/pinctrl/nomadik/pinctrl-abx500.c: In function 'abx500_gpio_probe': drivers/pinctrl/nomadik/pinctrl-abx500.c:1208:11: warning: unused variable 'err' [-Wunused-variable] Fix this by getting rid of the dangling variable. Reported-by: Arnd Bergmann Signed-off-by: Linus Walleij --- drivers/pinctrl/nomadik/pinctrl-abx500.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'drivers') diff --git a/drivers/pinctrl/nomadik/pinctrl-abx500.c b/drivers/pinctrl/nomadik/pinctrl-abx500.c index 7df34b70e8b6..080bcf8568c9 100644 --- a/drivers/pinctrl/nomadik/pinctrl-abx500.c +++ b/drivers/pinctrl/nomadik/pinctrl-abx500.c @@ -1206,7 +1206,7 @@ static int abx500_gpio_probe(struct platform_device *pdev) const struct of_device_id *match; struct abx500_pinctrl *pct; unsigned int id = -1; - int ret, err; + int ret; int i; if (!np) { -- cgit From a092e19b688be88f7329bd05f90cb92ebe1a4f5b Mon Sep 17 00:00:00 2001 From: Thierry Reding Date: Thu, 2 Oct 2014 09:20:21 +0200 Subject: gpio: pch: Build context save/restore only for PM The pch_gpio_save_reg_conf() and pch_gpio_restore_reg_conf() functions are only used in pch_gpio_suspend() and pch_gpio_resume(), respectively. Since the latter are only built if PM is enabled, make the former build under the same conditions. Signed-off-by: Thierry Reding Signed-off-by: Linus Walleij --- drivers/gpio/gpio-pch.c | 2 ++ 1 file changed, 2 insertions(+) (limited to 'drivers') diff --git a/drivers/gpio/gpio-pch.c b/drivers/gpio/gpio-pch.c index e0ac549dccb5..2d9a950ca2d4 100644 --- a/drivers/gpio/gpio-pch.c +++ b/drivers/gpio/gpio-pch.c @@ -171,6 +171,7 @@ static int pch_gpio_direction_input(struct gpio_chip *gpio, unsigned nr) return 0; } +#ifdef CONFIG_PM /* * Save register configuration and disable interrupts. */ @@ -206,6 +207,7 @@ static void pch_gpio_restore_reg_conf(struct pch_gpio *chip) iowrite32(chip->pch_gpio_reg.gpio_use_sel_reg, &chip->reg->gpio_use_sel); } +#endif static int pch_gpio_to_irq(struct gpio_chip *gpio, unsigned offset) { -- cgit