diff options
Diffstat (limited to 'drivers/gpio/gpio-mpc8xxx.c')
| -rw-r--r-- | drivers/gpio/gpio-mpc8xxx.c | 101 |
1 files changed, 62 insertions, 39 deletions
diff --git a/drivers/gpio/gpio-mpc8xxx.c b/drivers/gpio/gpio-mpc8xxx.c index c0125ac73906..0cd4c36ae8aa 100644 --- a/drivers/gpio/gpio-mpc8xxx.c +++ b/drivers/gpio/gpio-mpc8xxx.c @@ -7,19 +7,20 @@ */ #include <linux/acpi.h> -#include <linux/kernel.h> +#include <linux/bitops.h> +#include <linux/gpio/driver.h> #include <linux/init.h> -#include <linux/platform_device.h> -#include <linux/spinlock.h> +#include <linux/interrupt.h> #include <linux/io.h> -#include <linux/of.h> -#include <linux/property.h> +#include <linux/irq.h> +#include <linux/kernel.h> #include <linux/mod_devicetable.h> +#include <linux/platform_device.h> +#include <linux/pm.h> +#include <linux/pm_runtime.h> +#include <linux/property.h> #include <linux/slab.h> -#include <linux/irq.h> -#include <linux/gpio/driver.h> -#include <linux/bitops.h> -#include <linux/interrupt.h> +#include <linux/spinlock.h> #define MPC8XXX_GPIO_PINS 32 @@ -284,6 +285,7 @@ static const struct mpc8xxx_gpio_devtype mpc8xxx_gpio_devtype_default = { }; static const struct of_device_id mpc8xxx_gpio_ids[] = { + { .compatible = "fsl,mpc8314-gpio", }, { .compatible = "fsl,mpc8349-gpio", }, { .compatible = "fsl,mpc8572-gpio", .data = &mpc8572_gpio_devtype, }, { .compatible = "fsl,mpc8610-gpio", }, @@ -298,14 +300,14 @@ static const struct of_device_id mpc8xxx_gpio_ids[] = { static int mpc8xxx_probe(struct platform_device *pdev) { - struct device_node *np = pdev->dev.of_node; - struct mpc8xxx_gpio_chip *mpc8xxx_gc; - struct gpio_chip *gc; const struct mpc8xxx_gpio_devtype *devtype = NULL; + struct mpc8xxx_gpio_chip *mpc8xxx_gc; + struct device *dev = &pdev->dev; struct fwnode_handle *fwnode; + struct gpio_chip *gc; int ret; - mpc8xxx_gc = devm_kzalloc(&pdev->dev, sizeof(*mpc8xxx_gc), GFP_KERNEL); + mpc8xxx_gc = devm_kzalloc(dev, sizeof(*mpc8xxx_gc), GFP_KERNEL); if (!mpc8xxx_gc) return -ENOMEM; @@ -318,32 +320,28 @@ static int mpc8xxx_probe(struct platform_device *pdev) return PTR_ERR(mpc8xxx_gc->regs); gc = &mpc8xxx_gc->gc; - gc->parent = &pdev->dev; - - if (device_property_read_bool(&pdev->dev, "little-endian")) { - ret = bgpio_init(gc, &pdev->dev, 4, - mpc8xxx_gc->regs + GPIO_DAT, - NULL, NULL, - mpc8xxx_gc->regs + GPIO_DIR, NULL, - BGPIOF_BIG_ENDIAN); + gc->parent = dev; + + if (device_property_read_bool(dev, "little-endian")) { + ret = bgpio_init(gc, dev, 4, mpc8xxx_gc->regs + GPIO_DAT, + NULL, NULL, mpc8xxx_gc->regs + GPIO_DIR, + NULL, BGPIOF_BIG_ENDIAN); if (ret) return ret; - dev_dbg(&pdev->dev, "GPIO registers are LITTLE endian\n"); + dev_dbg(dev, "GPIO registers are LITTLE endian\n"); } else { - ret = bgpio_init(gc, &pdev->dev, 4, - mpc8xxx_gc->regs + GPIO_DAT, - NULL, NULL, - mpc8xxx_gc->regs + GPIO_DIR, NULL, - BGPIOF_BIG_ENDIAN + ret = bgpio_init(gc, dev, 4, mpc8xxx_gc->regs + GPIO_DAT, + NULL, NULL, mpc8xxx_gc->regs + GPIO_DIR, + NULL, BGPIOF_BIG_ENDIAN | BGPIOF_BIG_ENDIAN_BYTE_ORDER); if (ret) return ret; - dev_dbg(&pdev->dev, "GPIO registers are BIG endian\n"); + dev_dbg(dev, "GPIO registers are BIG endian\n"); } mpc8xxx_gc->direction_output = gc->direction_output; - devtype = device_get_match_data(&pdev->dev); + devtype = device_get_match_data(dev); if (!devtype) devtype = &mpc8xxx_gpio_devtype_default; @@ -368,10 +366,10 @@ static int mpc8xxx_probe(struct platform_device *pdev) * associated input enable must be set (GPIOxGPIE[IEn]=1) to propagate * the port value to the GPIO Data Register. */ - fwnode = dev_fwnode(&pdev->dev); - if (of_device_is_compatible(np, "fsl,qoriq-gpio") || - of_device_is_compatible(np, "fsl,ls1028a-gpio") || - of_device_is_compatible(np, "fsl,ls1088a-gpio") || + fwnode = dev_fwnode(dev); + if (device_is_compatible(dev, "fsl,qoriq-gpio") || + device_is_compatible(dev, "fsl,ls1028a-gpio") || + device_is_compatible(dev, "fsl,ls1088a-gpio") || is_acpi_node(fwnode)) { gc->write_reg(mpc8xxx_gc->regs + GPIO_IBE, 0xffffffff); /* Also, latch state of GPIOs configured as output by bootloader. */ @@ -379,9 +377,9 @@ static int mpc8xxx_probe(struct platform_device *pdev) gc->read_reg(mpc8xxx_gc->regs + GPIO_DIR); } - ret = devm_gpiochip_add_data(&pdev->dev, gc, mpc8xxx_gc); + ret = devm_gpiochip_add_data(dev, gc, mpc8xxx_gc); if (ret) { - dev_err(&pdev->dev, + dev_err(dev, "GPIO chip registration failed with status %d\n", ret); return ret; } @@ -402,17 +400,18 @@ static int mpc8xxx_probe(struct platform_device *pdev) gc->write_reg(mpc8xxx_gc->regs + GPIO_IER, 0xffffffff); gc->write_reg(mpc8xxx_gc->regs + GPIO_IMR, 0); - ret = devm_request_irq(&pdev->dev, mpc8xxx_gc->irqn, + ret = devm_request_irq(dev, mpc8xxx_gc->irqn, mpc8xxx_gpio_irq_cascade, IRQF_NO_THREAD | IRQF_SHARED, "gpio-cascade", mpc8xxx_gc); if (ret) { - dev_err(&pdev->dev, - "failed to devm_request_irq(%d), ret = %d\n", + dev_err(dev, "failed to devm_request_irq(%d), ret = %d\n", mpc8xxx_gc->irqn, ret); goto err; } + device_init_wakeup(dev, true); + return 0; err: irq_domain_remove(mpc8xxx_gc->irq); @@ -429,6 +428,29 @@ static void mpc8xxx_remove(struct platform_device *pdev) } } +static int mpc8xxx_suspend(struct device *dev) +{ + struct mpc8xxx_gpio_chip *mpc8xxx_gc = dev_get_drvdata(dev); + + if (mpc8xxx_gc->irqn && device_may_wakeup(dev)) + enable_irq_wake(mpc8xxx_gc->irqn); + + return 0; +} + +static int mpc8xxx_resume(struct device *dev) +{ + struct mpc8xxx_gpio_chip *mpc8xxx_gc = dev_get_drvdata(dev); + + if (mpc8xxx_gc->irqn && device_may_wakeup(dev)) + disable_irq_wake(mpc8xxx_gc->irqn); + + return 0; +} + +static DEFINE_RUNTIME_DEV_PM_OPS(mpc8xx_pm_ops, + mpc8xxx_suspend, mpc8xxx_resume, NULL); + #ifdef CONFIG_ACPI static const struct acpi_device_id gpio_acpi_ids[] = { {"NXP0031",}, @@ -439,11 +461,12 @@ MODULE_DEVICE_TABLE(acpi, gpio_acpi_ids); static struct platform_driver mpc8xxx_plat_driver = { .probe = mpc8xxx_probe, - .remove_new = mpc8xxx_remove, + .remove = mpc8xxx_remove, .driver = { .name = "gpio-mpc8xxx", .of_match_table = mpc8xxx_gpio_ids, .acpi_match_table = ACPI_PTR(gpio_acpi_ids), + .pm = pm_ptr(&mpc8xx_pm_ops), }, }; |