diff options
Diffstat (limited to 'drivers/gpio/gpio-spear-spics.c')
| -rw-r--r-- | drivers/gpio/gpio-spear-spics.c | 72 |
1 files changed, 15 insertions, 57 deletions
diff --git a/drivers/gpio/gpio-spear-spics.c b/drivers/gpio/gpio-spear-spics.c index 7a4bf7c0d98f..96a0e1211500 100644 --- a/drivers/gpio/gpio-spear-spics.c +++ b/drivers/gpio/gpio-spear-spics.c @@ -1,18 +1,15 @@ +// SPDX-License-Identifier: GPL-2.0-only /* * SPEAr platform SPI chipselect abstraction over gpiolib * * Copyright (C) 2012 ST Microelectronics - * Shiraz Hashim <shiraz.hashim@st.com> - * - * This file is licensed under the terms of the GNU General Public - * License version 2. This program is licensed "as is" without any - * warranty of any kind, whether express or implied. + * Shiraz Hashim <shiraz.linux.kernel@gmail.com> */ #include <linux/err.h> -#include <linux/gpio.h> +#include <linux/gpio/driver.h> #include <linux/io.h> -#include <linux/module.h> +#include <linux/init.h> #include <linux/of.h> #include <linux/platform_device.h> #include <linux/types.h> @@ -54,16 +51,10 @@ struct spear_spics { struct gpio_chip chip; }; -/* gpio framework specific routines */ -static int spics_get_value(struct gpio_chip *chip, unsigned offset) -{ - return -ENXIO; -} - -static void spics_set_value(struct gpio_chip *chip, unsigned offset, int value) +static int spics_set_value(struct gpio_chip *chip, unsigned int offset, + int value) { - struct spear_spics *spics = container_of(chip, struct spear_spics, - chip); + struct spear_spics *spics = gpiochip_get_data(chip); u32 tmp; /* select chip select from register */ @@ -78,24 +69,19 @@ static void spics_set_value(struct gpio_chip *chip, unsigned offset, int value) tmp &= ~(0x1 << spics->cs_value_bit); tmp |= value << spics->cs_value_bit; writel_relaxed(tmp, spics->base + spics->perip_cfg); -} -static int spics_direction_input(struct gpio_chip *chip, unsigned offset) -{ - return -ENXIO; + return 0; } static int spics_direction_output(struct gpio_chip *chip, unsigned offset, int value) { - spics_set_value(chip, offset, value); - return 0; + return spics_set_value(chip, offset, value); } static int spics_request(struct gpio_chip *chip, unsigned offset) { - struct spear_spics *spics = container_of(chip, struct spear_spics, - chip); + struct spear_spics *spics = gpiochip_get_data(chip); u32 tmp; if (!spics->use_count++) { @@ -110,8 +96,7 @@ static int spics_request(struct gpio_chip *chip, unsigned offset) static void spics_free(struct gpio_chip *chip, unsigned offset) { - struct spear_spics *spics = container_of(chip, struct spear_spics, - chip); + struct spear_spics *spics = gpiochip_get_data(chip); u32 tmp; if (!--spics->use_count) { @@ -125,22 +110,12 @@ static int spics_gpio_probe(struct platform_device *pdev) { struct device_node *np = pdev->dev.of_node; struct spear_spics *spics; - struct resource *res; - int ret; - - res = platform_get_resource(pdev, IORESOURCE_MEM, 0); - if (!res) { - dev_err(&pdev->dev, "invalid IORESOURCE_MEM\n"); - return -EBUSY; - } spics = devm_kzalloc(&pdev->dev, sizeof(*spics), GFP_KERNEL); - if (!spics) { - dev_err(&pdev->dev, "memory allocation fail\n"); + if (!spics) return -ENOMEM; - } - spics->base = devm_ioremap_resource(&pdev->dev, res); + spics->base = devm_platform_ioremap_resource(pdev, 0); if (IS_ERR(spics->base)) return PTR_ERR(spics->base); @@ -160,29 +135,18 @@ static int spics_gpio_probe(struct platform_device *pdev) &spics->cs_enable_shift)) goto err_dt_data; - platform_set_drvdata(pdev, spics); - spics->chip.ngpio = NUM_OF_GPIO; spics->chip.base = -1; spics->chip.request = spics_request; spics->chip.free = spics_free; - spics->chip.direction_input = spics_direction_input; spics->chip.direction_output = spics_direction_output; - spics->chip.get = spics_get_value; spics->chip.set = spics_set_value; spics->chip.label = dev_name(&pdev->dev); - spics->chip.dev = &pdev->dev; + spics->chip.parent = &pdev->dev; spics->chip.owner = THIS_MODULE; spics->last_off = -1; - ret = gpiochip_add(&spics->chip); - if (ret) { - dev_err(&pdev->dev, "unable to add gpio chip\n"); - return ret; - } - - dev_info(&pdev->dev, "spear spics registered\n"); - return 0; + return devm_gpiochip_add_data(&pdev->dev, &spics->chip, spics); err_dt_data: dev_err(&pdev->dev, "DT probe failed\n"); @@ -193,12 +157,10 @@ static const struct of_device_id spics_gpio_of_match[] = { { .compatible = "st,spear-spics-gpio" }, {} }; -MODULE_DEVICE_TABLE(of, spics_gpio_of_match); static struct platform_driver spics_gpio_driver = { .probe = spics_gpio_probe, .driver = { - .owner = THIS_MODULE, .name = "spear-spics-gpio", .of_match_table = spics_gpio_of_match, }, @@ -209,7 +171,3 @@ static int __init spics_gpio_init(void) return platform_driver_register(&spics_gpio_driver); } subsys_initcall(spics_gpio_init); - -MODULE_AUTHOR("Shiraz Hashim <shiraz.hashim@st.com>"); -MODULE_DESCRIPTION("ST Microlectronics SPEAr SPI Chip Select Abstraction"); -MODULE_LICENSE("GPL"); |