diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/gpio/gpio-tps65910.c | 140 |
1 files changed, 102 insertions, 38 deletions
diff --git a/drivers/gpio/gpio-tps65910.c b/drivers/gpio/gpio-tps65910.c index bc155f2..af6dc83 100644 --- a/drivers/gpio/gpio-tps65910.c +++ b/drivers/gpio/gpio-tps65910.c @@ -18,11 +18,23 @@ #include <linux/errno.h> #include <linux/gpio.h> #include <linux/i2c.h> +#include <linux/platform_device.h> #include <linux/mfd/tps65910.h> +struct tps65910_gpio { + struct gpio_chip gpio_chip; + struct tps65910 *tps65910; +}; + +static inline struct tps65910_gpio *to_tps65910_gpio(struct gpio_chip *chip) +{ + return container_of(chip, struct tps65910_gpio, gpio_chip); +} + static int tps65910_gpio_get(struct gpio_chip *gc, unsigned offset) { - struct tps65910 *tps65910 = container_of(gc, struct tps65910, gpio); + struct tps65910_gpio *tps65910_gpio = to_tps65910_gpio(gc); + struct tps65910 *tps65910 = tps65910_gpio->tps65910; unsigned int val; tps65910_reg_read(tps65910, TPS65910_GPIO0 + offset, &val); @@ -36,7 +48,8 @@ static int tps65910_gpio_get(struct gpio_chip *gc, unsigned offset) static void tps65910_gpio_set(struct gpio_chip *gc, unsigned offset, int value) { - struct tps65910 *tps65910 = container_of(gc, struct tps65910, gpio); + struct tps65910_gpio *tps65910_gpio = to_tps65910_gpio(gc); + struct tps65910 *tps65910 = tps65910_gpio->tps65910; if (value) tps65910_reg_set_bits(tps65910, TPS65910_GPIO0 + offset, @@ -49,7 +62,8 @@ static void tps65910_gpio_set(struct gpio_chip *gc, unsigned offset, static int tps65910_gpio_output(struct gpio_chip *gc, unsigned offset, int value) { - struct tps65910 *tps65910 = container_of(gc, struct tps65910, gpio); + struct tps65910_gpio *tps65910_gpio = to_tps65910_gpio(gc); + struct tps65910 *tps65910 = tps65910_gpio->tps65910; /* Set the initial value */ tps65910_gpio_set(gc, offset, value); @@ -60,59 +74,109 @@ static int tps65910_gpio_output(struct gpio_chip *gc, unsigned offset, static int tps65910_gpio_input(struct gpio_chip *gc, unsigned offset) { - struct tps65910 *tps65910 = container_of(gc, struct tps65910, gpio); + struct tps65910_gpio *tps65910_gpio = to_tps65910_gpio(gc); + struct tps65910 *tps65910 = tps65910_gpio->tps65910; return tps65910_reg_clear_bits(tps65910, TPS65910_GPIO0 + offset, GPIO_CFG_MASK); } -void tps65910_gpio_init(struct tps65910 *tps65910, int gpio_base) +static int __devinit tps65910_gpio_probe(struct platform_device *pdev) { + struct tps65910 *tps65910 = dev_get_drvdata(pdev->dev.parent); + struct tps65910_board *pdata = dev_get_platdata(tps65910->dev); + struct tps65910_gpio *tps65910_gpio; int ret; - struct tps65910_board *board_data; + int i; + + tps65910_gpio = devm_kzalloc(&pdev->dev, + sizeof(*tps65910_gpio), GFP_KERNEL); + if (!tps65910_gpio) { + dev_err(&pdev->dev, "Could not allocate tps65910_gpio\n"); + return -ENOMEM; + } - if (!gpio_base) - return; + tps65910_gpio->tps65910 = tps65910; - tps65910->gpio.owner = THIS_MODULE; - tps65910->gpio.label = tps65910->i2c_client->name; - tps65910->gpio.dev = tps65910->dev; - tps65910->gpio.base = gpio_base; + tps65910_gpio->gpio_chip.owner = THIS_MODULE; + tps65910_gpio->gpio_chip.label = tps65910->i2c_client->name; switch(tps65910_chip_id(tps65910)) { case TPS65910: - tps65910->gpio.ngpio = TPS65910_NUM_GPIO; + tps65910_gpio->gpio_chip.ngpio = TPS65910_NUM_GPIO; break; case TPS65911: - tps65910->gpio.ngpio = TPS65911_NUM_GPIO; + tps65910_gpio->gpio_chip.ngpio = TPS65911_NUM_GPIO; break; default: - return; + return -EINVAL; } - tps65910->gpio.can_sleep = 1; - - tps65910->gpio.direction_input = tps65910_gpio_input; - tps65910->gpio.direction_output = tps65910_gpio_output; - tps65910->gpio.set = tps65910_gpio_set; - tps65910->gpio.get = tps65910_gpio_get; - - /* Configure sleep control for gpios */ - board_data = dev_get_platdata(tps65910->dev); - if (board_data) { - int i; - for (i = 0; i < tps65910->gpio.ngpio; ++i) { - if (board_data->en_gpio_sleep[i]) { - ret = tps65910_reg_set_bits(tps65910, - TPS65910_GPIO0 + i, GPIO_SLEEP_MASK); - if (ret < 0) - dev_warn(tps65910->dev, - "GPIO Sleep setting failed\n"); - } - } + tps65910_gpio->gpio_chip.can_sleep = 1; + tps65910_gpio->gpio_chip.direction_input = tps65910_gpio_input; + tps65910_gpio->gpio_chip.direction_output = tps65910_gpio_output; + tps65910_gpio->gpio_chip.set = tps65910_gpio_set; + tps65910_gpio->gpio_chip.get = tps65910_gpio_get; + tps65910_gpio->gpio_chip.dev = &pdev->dev; + if (pdata && pdata->gpio_base) + tps65910_gpio->gpio_chip.base = pdata->gpio_base; + else + tps65910_gpio->gpio_chip.base = -1; + + if (!pdata) + goto skip_init; + + /* Configure sleep control for gpios if provided */ + for (i = 0; i < tps65910_gpio->gpio_chip.ngpio; ++i) { + if (!pdata->en_gpio_sleep[i]) + continue; + + ret = tps65910_reg_set_bits(tps65910, + TPS65910_GPIO0 + i, GPIO_SLEEP_MASK); + if (ret < 0) + dev_warn(tps65910->dev, + "GPIO Sleep setting failed with err %d\n", ret); + } + +skip_init: + ret = gpiochip_add(&tps65910_gpio->gpio_chip); + if (ret < 0) { + dev_err(&pdev->dev, "Could not register gpiochip, %d\n", ret); + return ret; } - ret = gpiochip_add(&tps65910->gpio); + platform_set_drvdata(pdev, tps65910_gpio); - if (ret) - dev_warn(tps65910->dev, "GPIO registration failed: %d\n", ret); + return ret; } + +static int __devexit tps65910_gpio_remove(struct platform_device *pdev) +{ + struct tps65910_gpio *tps65910_gpio = platform_get_drvdata(pdev); + + return gpiochip_remove(&tps65910_gpio->gpio_chip); +} + +static struct platform_driver tps65910_gpio_driver = { + .driver.name = "tps65910-gpio", + .driver.owner = THIS_MODULE, + .probe = tps65910_gpio_probe, + .remove = __devexit_p(tps65910_gpio_remove), +}; + +static int __init tps65910_gpio_init(void) +{ + return platform_driver_register(&tps65910_gpio_driver); +} +subsys_initcall(tps65910_gpio_init); + +static void __exit tps65910_gpio_exit(void) +{ + platform_driver_unregister(&tps65910_gpio_driver); +} +module_exit(tps65910_gpio_exit); + +MODULE_AUTHOR("Graeme Gregory <gg@slimlogic.co.uk>"); +MODULE_AUTHOR("Jorge Eduardo Candelaria jedu@slimlogic.co.uk>"); +MODULE_DESCRIPTION("GPIO interface for TPS65910/TPS6511 PMICs"); +MODULE_LICENSE("GPL v2"); +MODULE_ALIAS("platform:tps65910-gpio"); |