diff options
Diffstat (limited to 'drivers/gpio')
| -rw-r--r-- | drivers/gpio/Kconfig | 8 | ||||
| -rw-r--r-- | drivers/gpio/Makefile | 2 | ||||
| -rw-r--r-- | drivers/gpio/tc35892-gpio.c | 389 | ||||
| -rw-r--r-- | drivers/gpio/tc3589x-gpio.c | 389 |
4 files changed, 394 insertions, 394 deletions
diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig index 3143ac795eb0..082495bb08a7 100644 --- a/drivers/gpio/Kconfig +++ b/drivers/gpio/Kconfig @@ -230,11 +230,11 @@ config GPIO_STMPE This enables support for the GPIOs found on the STMPE I/O Expanders. -config GPIO_TC35892 - bool "TC35892 GPIOs" - depends on MFD_TC35892 +config GPIO_TC3589X + bool "TC3589X GPIOs" + depends on MFD_TC3589X help - This enables support for the GPIOs found on the TC35892 + This enables support for the GPIOs found on the TC3589X I/O Expander. config GPIO_TWL4030 diff --git a/drivers/gpio/Makefile b/drivers/gpio/Makefile index bdf3ddec0652..39bfd7a37650 100644 --- a/drivers/gpio/Makefile +++ b/drivers/gpio/Makefile @@ -24,7 +24,7 @@ obj-$(CONFIG_GPIO_PCF857X) += pcf857x.o obj-$(CONFIG_GPIO_PCH) += pch_gpio.o obj-$(CONFIG_GPIO_PL061) += pl061.o obj-$(CONFIG_GPIO_STMPE) += stmpe-gpio.o -obj-$(CONFIG_GPIO_TC35892) += tc35892-gpio.o +obj-$(CONFIG_GPIO_TC3589X) += tc3589x-gpio.o obj-$(CONFIG_GPIO_TIMBERDALE) += timbgpio.o obj-$(CONFIG_GPIO_TWL4030) += twl4030-gpio.o obj-$(CONFIG_GPIO_UCB1400) += ucb1400_gpio.o diff --git a/drivers/gpio/tc35892-gpio.c b/drivers/gpio/tc35892-gpio.c deleted file mode 100644 index 7e10c935a047..000000000000 --- a/drivers/gpio/tc35892-gpio.c +++ /dev/null @@ -1,389 +0,0 @@ -/* - * Copyright (C) ST-Ericsson SA 2010 - * - * License Terms: GNU General Public License, version 2 - * Author: Hanumath Prasad <hanumath.prasad@stericsson.com> for ST-Ericsson - * Author: Rabin Vincent <rabin.vincent@stericsson.com> for ST-Ericsson - */ - -#include <linux/module.h> -#include <linux/init.h> -#include <linux/platform_device.h> -#include <linux/slab.h> -#include <linux/gpio.h> -#include <linux/irq.h> -#include <linux/interrupt.h> -#include <linux/mfd/tc35892.h> - -/* - * These registers are modified under the irq bus lock and cached to avoid - * unnecessary writes in bus_sync_unlock. - */ -enum { REG_IBE, REG_IEV, REG_IS, REG_IE }; - -#define CACHE_NR_REGS 4 -#define CACHE_NR_BANKS 3 - -struct tc35892_gpio { - struct gpio_chip chip; - struct tc35892 *tc35892; - struct device *dev; - struct mutex irq_lock; - - int irq_base; - - /* Caches of interrupt control registers for bus_lock */ - u8 regs[CACHE_NR_REGS][CACHE_NR_BANKS]; - u8 oldregs[CACHE_NR_REGS][CACHE_NR_BANKS]; -}; - -static inline struct tc35892_gpio *to_tc35892_gpio(struct gpio_chip *chip) -{ - return container_of(chip, struct tc35892_gpio, chip); -} - -static int tc35892_gpio_get(struct gpio_chip *chip, unsigned offset) -{ - struct tc35892_gpio *tc35892_gpio = to_tc35892_gpio(chip); - struct tc35892 *tc35892 = tc35892_gpio->tc35892; - u8 reg = TC35892_GPIODATA0 + (offset / 8) * 2; - u8 mask = 1 << (offset % 8); - int ret; - - ret = tc35892_reg_read(tc35892, reg); - if (ret < 0) - return ret; - - return ret & mask; -} - -static void tc35892_gpio_set(struct gpio_chip *chip, unsigned offset, int val) -{ - struct tc35892_gpio *tc35892_gpio = to_tc35892_gpio(chip); - struct tc35892 *tc35892 = tc35892_gpio->tc35892; - u8 reg = TC35892_GPIODATA0 + (offset / 8) * 2; - unsigned pos = offset % 8; - u8 data[] = {!!val << pos, 1 << pos}; - - tc35892_block_write(tc35892, reg, ARRAY_SIZE(data), data); -} - -static int tc35892_gpio_direction_output(struct gpio_chip *chip, - unsigned offset, int val) -{ - struct tc35892_gpio *tc35892_gpio = to_tc35892_gpio(chip); - struct tc35892 *tc35892 = tc35892_gpio->tc35892; - u8 reg = TC35892_GPIODIR0 + offset / 8; - unsigned pos = offset % 8; - - tc35892_gpio_set(chip, offset, val); - - return tc35892_set_bits(tc35892, reg, 1 << pos, 1 << pos); -} - -static int tc35892_gpio_direction_input(struct gpio_chip *chip, - unsigned offset) -{ - struct tc35892_gpio *tc35892_gpio = to_tc35892_gpio(chip); - struct tc35892 *tc35892 = tc35892_gpio->tc35892; - u8 reg = TC35892_GPIODIR0 + offset / 8; - unsigned pos = offset % 8; - - return tc35892_set_bits(tc35892, reg, 1 << pos, 0); -} - -static int tc35892_gpio_to_irq(struct gpio_chip *chip, unsigned offset) -{ - struct tc35892_gpio *tc35892_gpio = to_tc35892_gpio(chip); - - return tc35892_gpio->irq_base + offset; -} - -static struct gpio_chip template_chip = { - .label = "tc35892", - .owner = THIS_MODULE, - .direction_input = tc35892_gpio_direction_input, - .get = tc35892_gpio_get, - .direction_output = tc35892_gpio_direction_output, - .set = tc35892_gpio_set, - .to_irq = tc35892_gpio_to_irq, - .can_sleep = 1, -}; - -static int tc35892_gpio_irq_set_type(unsigned int irq, unsigned int type) -{ - struct tc35892_gpio *tc35892_gpio = get_irq_chip_data(irq); - int offset = irq - tc35892_gpio->irq_base; - int regoffset = offset / 8; - int mask = 1 << (offset % 8); - - if (type == IRQ_TYPE_EDGE_BOTH) { - tc35892_gpio->regs[REG_IBE][regoffset] |= mask; - return 0; - } - - tc35892_gpio->regs[REG_IBE][regoffset] &= ~mask; - - if (type == IRQ_TYPE_LEVEL_LOW || type == IRQ_TYPE_LEVEL_HIGH) - tc35892_gpio->regs[REG_IS][regoffset] |= mask; - else - tc35892_gpio->regs[REG_IS][regoffset] &= ~mask; - - if (type == IRQ_TYPE_EDGE_RISING || type == IRQ_TYPE_LEVEL_HIGH) - tc35892_gpio->regs[REG_IEV][regoffset] |= mask; - else - tc35892_gpio->regs[REG_IEV][regoffset] &= ~mask; - - return 0; -} - -static void tc35892_gpio_irq_lock(unsigned int irq) -{ - struct tc35892_gpio *tc35892_gpio = get_irq_chip_data(irq); - - mutex_lock(&tc35892_gpio->irq_lock); -} - -static void tc35892_gpio_irq_sync_unlock(unsigned int irq) -{ - struct tc35892_gpio *tc35892_gpio = get_irq_chip_data(irq); - struct tc35892 *tc35892 = tc35892_gpio->tc35892; - static const u8 regmap[] = { - [REG_IBE] = TC35892_GPIOIBE0, - [REG_IEV] = TC35892_GPIOIEV0, - [REG_IS] = TC35892_GPIOIS0, - [REG_IE] = TC35892_GPIOIE0, - }; - int i, j; - - for (i = 0; i < CACHE_NR_REGS; i++) { - for (j = 0; j < CACHE_NR_BANKS; j++) { - u8 old = tc35892_gpio->oldregs[i][j]; - u8 new = tc35892_gpio->regs[i][j]; - - if (new == old) - continue; - - tc35892_gpio->oldregs[i][j] = new; - tc35892_reg_write(tc35892, regmap[i] + j * 8, new); - } - } - - mutex_unlock(&tc35892_gpio->irq_lock); -} - -static void tc35892_gpio_irq_mask(unsigned int irq) -{ - struct tc35892_gpio *tc35892_gpio = get_irq_chip_data(irq); - int offset = irq - tc35892_gpio->irq_base; - int regoffset = offset / 8; - int mask = 1 << (offset % 8); - - tc35892_gpio->regs[REG_IE][regoffset] &= ~mask; -} - -static void tc35892_gpio_irq_unmask(unsigned int irq) -{ - struct tc35892_gpio *tc35892_gpio = get_irq_chip_data(irq); - int offset = irq - tc35892_gpio->irq_base; - int regoffset = offset / 8; - int mask = 1 << (offset % 8); - - tc35892_gpio->regs[REG_IE][regoffset] |= mask; -} - -static struct irq_chip tc35892_gpio_irq_chip = { - .name = "tc35892-gpio", - .bus_lock = tc35892_gpio_irq_lock, - .bus_sync_unlock = tc35892_gpio_irq_sync_unlock, - .mask = tc35892_gpio_irq_mask, - .unmask = tc35892_gpio_irq_unmask, - .set_type = tc35892_gpio_irq_set_type, -}; - -static irqreturn_t tc35892_gpio_irq(int irq, void *dev) -{ - struct tc35892_gpio *tc35892_gpio = dev; - struct tc35892 *tc35892 = tc35892_gpio->tc35892; - u8 status[CACHE_NR_BANKS]; - int ret; - int i; - - ret = tc35892_block_read(tc35892, TC35892_GPIOMIS0, - ARRAY_SIZE(status), status); - if (ret < 0) - return IRQ_NONE; - - for (i = 0; i < ARRAY_SIZE(status); i++) { - unsigned int stat = status[i]; - if (!stat) - continue; - - while (stat) { - int bit = __ffs(stat); - int line = i * 8 + bit; - - handle_nested_irq(tc35892_gpio->irq_base + line); - stat &= ~(1 << bit); - } - - tc35892_reg_write(tc35892, TC35892_GPIOIC0 + i, status[i]); - } - - return IRQ_HANDLED; -} - -static int tc35892_gpio_irq_init(struct tc35892_gpio *tc35892_gpio) -{ - int base = tc35892_gpio->irq_base; - int irq; - - for (irq = base; irq < base + tc35892_gpio->chip.ngpio; irq++) { - set_irq_chip_data(irq, tc35892_gpio); - set_irq_chip_and_handler(irq, &tc35892_gpio_irq_chip, - handle_simple_irq); - set_irq_nested_thread(irq, 1); -#ifdef CONFIG_ARM - set_irq_flags(irq, IRQF_VALID); -#else - set_irq_noprobe(irq); -#endif - } - - return 0; -} - -static void tc35892_gpio_irq_remove(struct tc35892_gpio *tc35892_gpio) -{ - int base = tc35892_gpio->irq_base; - int irq; - - for (irq = base; irq < base + tc35892_gpio->chip.ngpio; irq++) { -#ifdef CONFIG_ARM - set_irq_flags(irq, 0); -#endif - set_irq_chip_and_handler(irq, NULL, NULL); - set_irq_chip_data(irq, NULL); - } -} - -static int __devinit tc35892_gpio_probe(struct platform_device *pdev) -{ - struct tc35892 *tc35892 = dev_get_drvdata(pdev->dev.parent); - struct tc35892_gpio_platform_data *pdata; - struct tc35892_gpio *tc35892_gpio; - int ret; - int irq; - - pdata = tc35892->pdata->gpio; - if (!pdata) - return -ENODEV; - - irq = platform_get_irq(pdev, 0); - if (irq < 0) - return irq; - - tc35892_gpio = kzalloc(sizeof(struct tc35892_gpio), GFP_KERNEL); - if (!tc35892_gpio) - return -ENOMEM; - - mutex_init(&tc35892_gpio->irq_lock); - - tc35892_gpio->dev = &pdev->dev; - tc35892_gpio->tc35892 = tc35892; - - tc35892_gpio->chip = template_chip; - tc35892_gpio->chip.ngpio = tc35892->num_gpio; - tc35892_gpio->chip.dev = &pdev->dev; - tc35892_gpio->chip.base = pdata->gpio_base; - - tc35892_gpio->irq_base = tc35892->irq_base + TC35892_INT_GPIO(0); - - /* Bring the GPIO module out of reset */ - ret = tc35892_set_bits(tc35892, TC35892_RSTCTRL, - TC35892_RSTCTRL_GPIRST, 0); - if (ret < 0) - goto out_free; - - ret = tc35892_gpio_irq_init(tc35892_gpio); - if (ret) - goto out_free; - - ret = request_threaded_irq(irq, NULL, tc35892_gpio_irq, IRQF_ONESHOT, - "tc35892-gpio", tc35892_gpio); - if (ret) { - dev_err(&pdev->dev, "unable to get irq: %d\n", ret); - goto out_removeirq; - } - - ret = gpiochip_add(&tc35892_gpio->chip); - if (ret) { - dev_err(&pdev->dev, "unable to add gpiochip: %d\n", ret); - goto out_freeirq; - } - - if (pdata->setup) - pdata->setup(tc35892, tc35892_gpio->chip.base); - - platform_set_drvdata(pdev, tc35892_gpio); - - return 0; - -out_freeirq: - free_irq(irq, tc35892_gpio); -out_removeirq: - tc35892_gpio_irq_remove(tc35892_gpio); -out_free: - kfree(tc35892_gpio); - return ret; -} - -static int __devexit tc35892_gpio_remove(struct platform_device *pdev) -{ - struct tc35892_gpio *tc35892_gpio = platform_get_drvdata(pdev); - struct tc35892 *tc35892 = tc35892_gpio->tc35892; - struct tc35892_gpio_platform_data *pdata = tc35892->pdata->gpio; - int irq = platform_get_irq(pdev, 0); - int ret; - - if (pdata->remove) - pdata->remove(tc35892, tc35892_gpio->chip.base); - - ret = gpiochip_remove(&tc35892_gpio->chip); - if (ret < 0) { - dev_err(tc35892_gpio->dev, - "unable to remove gpiochip: %d\n", ret); - return ret; - } - - free_irq(irq, tc35892_gpio); - tc35892_gpio_irq_remove(tc35892_gpio); - - platform_set_drvdata(pdev, NULL); - kfree(tc35892_gpio); - - return 0; -} - -static struct platform_driver tc35892_gpio_driver = { - .driver.name = "tc35892-gpio", - .driver.owner = THIS_MODULE, - .probe = tc35892_gpio_probe, - .remove = __devexit_p(tc35892_gpio_remove), -}; - -static int __init tc35892_gpio_init(void) -{ - return platform_driver_register(&tc35892_gpio_driver); -} -subsys_initcall(tc35892_gpio_init); - -static void __exit tc35892_gpio_exit(void) -{ - platform_driver_unregister(&tc35892_gpio_driver); -} -module_exit(tc35892_gpio_exit); - -MODULE_LICENSE("GPL v2"); -MODULE_DESCRIPTION("TC35892 GPIO driver"); -MODULE_AUTHOR("Hanumath Prasad, Rabin Vincent"); diff --git a/drivers/gpio/tc3589x-gpio.c b/drivers/gpio/tc3589x-gpio.c new file mode 100644 index 000000000000..180d584454fb --- /dev/null +++ b/drivers/gpio/tc3589x-gpio.c @@ -0,0 +1,389 @@ +/* + * Copyright (C) ST-Ericsson SA 2010 + * + * License Terms: GNU General Public License, version 2 + * Author: Hanumath Prasad <hanumath.prasad@stericsson.com> for ST-Ericsson + * Author: Rabin Vincent <rabin.vincent@stericsson.com> for ST-Ericsson + */ + +#include <linux/module.h> +#include <linux/init.h> +#include <linux/platform_device.h> +#include <linux/slab.h> +#include <linux/gpio.h> +#include <linux/irq.h> +#include <linux/interrupt.h> +#include <linux/mfd/tc3589x.h> + +/* + * These registers are modified under the irq bus lock and cached to avoid + * unnecessary writes in bus_sync_unlock. + */ +enum { REG_IBE, REG_IEV, REG_IS, REG_IE }; + +#define CACHE_NR_REGS 4 +#define CACHE_NR_BANKS 3 + +struct tc3589x_gpio { + struct gpio_chip chip; + struct tc3589x *tc3589x; + struct device *dev; + struct mutex irq_lock; + + int irq_base; + + /* Caches of interrupt control registers for bus_lock */ + u8 regs[CACHE_NR_REGS][CACHE_NR_BANKS]; + u8 oldregs[CACHE_NR_REGS][CACHE_NR_BANKS]; +}; + +static inline struct tc3589x_gpio *to_tc3589x_gpio(struct gpio_chip *chip) +{ + return container_of(chip, struct tc3589x_gpio, chip); +} + +static int tc3589x_gpio_get(struct gpio_chip *chip, unsigned offset) +{ + struct tc3589x_gpio *tc3589x_gpio = to_tc3589x_gpio(chip); + struct tc3589x *tc3589x = tc3589x_gpio->tc3589x; + u8 reg = TC3589x_GPIODATA0 + (offset / 8) * 2; + u8 mask = 1 << (offset % 8); + int ret; + + ret = tc3589x_reg_read(tc3589x, reg); + if (ret < 0) + return ret; + + return ret & mask; +} + +static void tc3589x_gpio_set(struct gpio_chip *chip, unsigned offset, int val) +{ + struct tc3589x_gpio *tc3589x_gpio = to_tc3589x_gpio(chip); + struct tc3589x *tc3589x = tc3589x_gpio->tc3589x; + u8 reg = TC3589x_GPIODATA0 + (offset / 8) * 2; + unsigned pos = offset % 8; + u8 data[] = {!!val << pos, 1 << pos}; + + tc3589x_block_write(tc3589x, reg, ARRAY_SIZE(data), data); +} + +static int tc3589x_gpio_direction_output(struct gpio_chip *chip, + unsigned offset, int val) +{ + struct tc3589x_gpio *tc3589x_gpio = to_tc3589x_gpio(chip); + struct tc3589x *tc3589x = tc3589x_gpio->tc3589x; + u8 reg = TC3589x_GPIODIR0 + offset / 8; + unsigned pos = offset % 8; + + tc3589x_gpio_set(chip, offset, val); + + return tc3589x_set_bits(tc3589x, reg, 1 << pos, 1 << pos); +} + +static int tc3589x_gpio_direction_input(struct gpio_chip *chip, + unsigned offset) +{ + struct tc3589x_gpio *tc3589x_gpio = to_tc3589x_gpio(chip); + struct tc3589x *tc3589x = tc3589x_gpio->tc3589x; + u8 reg = TC3589x_GPIODIR0 + offset / 8; + unsigned pos = offset % 8; + + return tc3589x_set_bits(tc3589x, reg, 1 << pos, 0); +} + +static int tc3589x_gpio_to_irq(struct gpio_chip *chip, unsigned offset) +{ + struct tc3589x_gpio *tc3589x_gpio = to_tc3589x_gpio(chip); + + return tc3589x_gpio->irq_base + offset; +} + +static struct gpio_chip template_chip = { + .label = "tc3589x", + .owner = THIS_MODULE, + .direction_input = tc3589x_gpio_direction_input, + .get = tc3589x_gpio_get, + .direction_output = tc3589x_gpio_direction_output, + .set = tc3589x_gpio_set, + .to_irq = tc3589x_gpio_to_irq, + .can_sleep = 1, +}; + +static int tc3589x_gpio_irq_set_type(unsigned int irq, unsigned int type) +{ + struct tc3589x_gpio *tc3589x_gpio = get_irq_chip_data(irq); + int offset = irq - tc3589x_gpio->irq_base; + int regoffset = offset / 8; + int mask = 1 << (offset % 8); + + if (type == IRQ_TYPE_EDGE_BOTH) { + tc3589x_gpio->regs[REG_IBE][regoffset] |= mask; + return 0; + } + + tc3589x_gpio->regs[REG_IBE][regoffset] &= ~mask; + + if (type == IRQ_TYPE_LEVEL_LOW || type == IRQ_TYPE_LEVEL_HIGH) + tc3589x_gpio->regs[REG_IS][regoffset] |= mask; + else + tc3589x_gpio->regs[REG_IS][regoffset] &= ~mask; + + if (type == IRQ_TYPE_EDGE_RISING || type == IRQ_TYPE_LEVEL_HIGH) + tc3589x_gpio->regs[REG_IEV][regoffset] |= mask; + else + tc3589x_gpio->regs[REG_IEV][regoffset] &= ~mask; + + return 0; +} + +static void tc3589x_gpio_irq_lock(unsigned int irq) +{ + struct tc3589x_gpio *tc3589x_gpio = get_irq_chip_data(irq); + + mutex_lock(&tc3589x_gpio->irq_lock); +} + +static void tc3589x_gpio_irq_sync_unlock(unsigned int irq) +{ + struct tc3589x_gpio *tc3589x_gpio = get_irq_chip_data(irq); + struct tc3589x *tc3589x = tc3589x_gpio->tc3589x; + static const u8 regmap[] = { + [REG_IBE] = TC3589x_GPIOIBE0, + [REG_IEV] = TC3589x_GPIOIEV0, + [REG_IS] = TC3589x_GPIOIS0, + [REG_IE] = TC3589x_GPIOIE0, + }; + int i, j; + + for (i = 0; i < CACHE_NR_REGS; i++) { + for (j = 0; j < CACHE_NR_BANKS; j++) { + u8 old = tc3589x_gpio->oldregs[i][j]; + u8 new = tc3589x_gpio->regs[i][j]; + + if (new == old) + continue; + + tc3589x_gpio->oldregs[i][j] = new; + tc3589x_reg_write(tc3589x, regmap[i] + j * 8, new); + } + } + + mutex_unlock(&tc3589x_gpio->irq_lock); +} + +static void tc3589x_gpio_irq_mask(unsigned int irq) +{ + struct tc3589x_gpio *tc3589x_gpio = get_irq_chip_data(irq); + int offset = irq - tc3589x_gpio->irq_base; + int regoffset = offset / 8; + int mask = 1 << (offset % 8); + + tc3589x_gpio->regs[REG_IE][regoffset] &= ~mask; +} + +static void tc3589x_gpio_irq_unmask(unsigned int irq) +{ + struct tc3589x_gpio *tc3589x_gpio = get_irq_chip_data(irq); + int offset = irq - tc3589x_gpio->irq_base; + int regoffset = offset / 8; + int mask = 1 << (offset % 8); + + tc3589x_gpio->regs[REG_IE][regoffset] |= mask; +} + +static struct irq_chip tc3589x_gpio_irq_chip = { + .name = "tc3589x-gpio", + .bus_lock = tc3589x_gpio_irq_lock, + .bus_sync_unlock = tc3589x_gpio_irq_sync_unlock, + .mask = tc3589x_gpio_irq_mask, + .unmask = tc3589x_gpio_irq_unmask, + .set_type = tc3589x_gpio_irq_set_type, +}; + +static irqreturn_t tc3589x_gpio_irq(int irq, void *dev) +{ + struct tc3589x_gpio *tc3589x_gpio = dev; + struct tc3589x *tc3589x = tc3589x_gpio->tc3589x; + u8 status[CACHE_NR_BANKS]; + int ret; + int i; + + ret = tc3589x_block_read(tc3589x, TC3589x_GPIOMIS0, + ARRAY_SIZE(status), status); + if (ret < 0) + return IRQ_NONE; + + for (i = 0; i < ARRAY_SIZE(status); i++) { + unsigned int stat = status[i]; + if (!stat) + continue; + + while (stat) { + int bit = __ffs(stat); + int line = i * 8 + bit; + + handle_nested_irq(tc3589x_gpio->irq_base + line); + stat &= ~(1 << bit); + } + + tc3589x_reg_write(tc3589x, TC3589x_GPIOIC0 + i, status[i]); + } + + return IRQ_HANDLED; +} + +static int tc3589x_gpio_irq_init(struct tc3589x_gpio *tc3589x_gpio) +{ + int base = tc3589x_gpio->irq_base; + int irq; + + for (irq = base; irq < base + tc3589x_gpio->chip.ngpio; irq++) { + set_irq_chip_data(irq, tc3589x_gpio); + set_irq_chip_and_handler(irq, &tc3589x_gpio_irq_chip, + handle_simple_irq); + set_irq_nested_thread(irq, 1); +#ifdef CONFIG_ARM + set_irq_flags(irq, IRQF_VALID); +#else + set_irq_noprobe(irq); +#endif + } + + return 0; +} + +static void tc3589x_gpio_irq_remove(struct tc3589x_gpio *tc3589x_gpio) +{ + int base = tc3589x_gpio->irq_base; + int irq; + + for (irq = base; irq < base + tc3589x_gpio->chip.ngpio; irq++) { +#ifdef CONFIG_ARM + set_irq_flags(irq, 0); +#endif + set_irq_chip_and_handler(irq, NULL, NULL); + set_irq_chip_data(irq, NULL); + } +} + +static int __devinit tc3589x_gpio_probe(struct platform_device *pdev) +{ + struct tc3589x *tc3589x = dev_get_drvdata(pdev->dev.parent); + struct tc3589x_gpio_platform_data *pdata; + struct tc3589x_gpio *tc3589x_gpio; + int ret; + int irq; + + pdata = tc3589x->pdata->gpio; + if (!pdata) + return -ENODEV; + + irq = platform_get_irq(pdev, 0); + if (irq < 0) + return irq; + + tc3589x_gpio = kzalloc(sizeof(struct tc3589x_gpio), GFP_KERNEL); + if (!tc3589x_gpio) + return -ENOMEM; + + mutex_init(&tc3589x_gpio->irq_lock); + + tc3589x_gpio->dev = &pdev->dev; + tc3589x_gpio->tc3589x = tc3589x; + + tc3589x_gpio->chip = template_chip; + tc3589x_gpio->chip.ngpio = tc3589x->num_gpio; + tc3589x_gpio->chip.dev = &pdev->dev; + tc3589x_gpio->chip.base = pdata->gpio_base; + + tc3589x_gpio->irq_base = tc3589x->irq_base + TC3589x_INT_GPIO(0); + + /* Bring the GPIO module out of reset */ + ret = tc3589x_set_bits(tc3589x, TC3589x_RSTCTRL, + TC3589x_RSTCTRL_GPIRST, 0); + if (ret < 0) + goto out_free; + + ret = tc3589x_gpio_irq_init(tc3589x_gpio); + if (ret) + goto out_free; + + ret = request_threaded_irq(irq, NULL, tc3589x_gpio_irq, IRQF_ONESHOT, + "tc3589x-gpio", tc3589x_gpio); + if (ret) { + dev_err(&pdev->dev, "unable to get irq: %d\n", ret); + goto out_removeirq; + } + + ret = gpiochip_add(&tc3589x_gpio->chip); + if (ret) { + dev_err(&pdev->dev, "unable to add gpiochip: %d\n", ret); + goto out_freeirq; + } + + if (pdata->setup) + pdata->setup(tc3589x, tc3589x_gpio->chip.base); + + platform_set_drvdata(pdev, tc3589x_gpio); + + return 0; + +out_freeirq: + free_irq(irq, tc3589x_gpio); +out_removeirq: + tc3589x_gpio_irq_remove(tc3589x_gpio); +out_free: + kfree(tc3589x_gpio); + return ret; +} + +static int __devexit tc3589x_gpio_remove(struct platform_device *pdev) +{ + struct tc3589x_gpio *tc3589x_gpio = platform_get_drvdata(pdev); + struct tc3589x *tc3589x = tc3589x_gpio->tc3589x; + struct tc3589x_gpio_platform_data *pdata = tc3589x->pdata->gpio; + int irq = platform_get_irq(pdev, 0); + int ret; + + if (pdata->remove) + pdata->remove(tc3589x, tc3589x_gpio->chip.base); + + ret = gpiochip_remove(&tc3589x_gpio->chip); + if (ret < 0) { + dev_err(tc3589x_gpio->dev, + "unable to remove gpiochip: %d\n", ret); + return ret; + } + + free_irq(irq, tc3589x_gpio); + tc3589x_gpio_irq_remove(tc3589x_gpio); + + platform_set_drvdata(pdev, NULL); + kfree(tc3589x_gpio); + + return 0; +} + +static struct platform_driver tc3589x_gpio_driver = { + .driver.name = "tc3589x-gpio", + .driver.owner = THIS_MODULE, + .probe = tc3589x_gpio_probe, + .remove = __devexit_p(tc3589x_gpio_remove), +}; + +static int __init tc3589x_gpio_init(void) +{ + return platform_driver_register(&tc3589x_gpio_driver); +} +subsys_initcall(tc3589x_gpio_init); + +static void __exit tc3589x_gpio_exit(void) +{ + platform_driver_unregister(&tc3589x_gpio_driver); +} +module_exit(tc3589x_gpio_exit); + +MODULE_LICENSE("GPL v2"); +MODULE_DESCRIPTION("TC3589x GPIO driver"); +MODULE_AUTHOR("Hanumath Prasad, Rabin Vincent"); |