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author | Linus Walleij <linus.walleij@linaro.org> | 2018-12-02 12:04:10 +0100 |
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committer | Wim Van Sebroeck <wim@linux-watchdog.org> | 2018-12-22 12:15:34 +0100 |
commit | 22ec9bb1cbcd613c73476ccd8f6a5e8c77793f66 (patch) | |
tree | 6a8bc651ddd04d78b3e45beeaeaa236a50090df6 /drivers/watchdog | |
parent | dt-bindings: watchdog: Add Qualcomm PM8916 watchdog (diff) | |
download | linux-22ec9bb1cbcd613c73476ccd8f6a5e8c77793f66.tar.xz linux-22ec9bb1cbcd613c73476ccd8f6a5e8c77793f66.zip |
watchdog: mena21_wdt: Convert to GPIO descriptors
This drops the old OF API use to look up global GPIO
numbers and replace it with the GPIO descriptor API.
Cc: Johannes Thumshirn <jthumshirn@suse.de>
Cc: Johannes Thumshirn <morbidrsa@gmail.com>
Cc: Johannes Thumshirn <jth@kernel.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Acked-by: Johannes Thumshirn <jthumshirn@suse.de>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@linux-watchdog.org>
Diffstat (limited to 'drivers/watchdog')
-rw-r--r-- | drivers/watchdog/mena21_wdt.c | 73 |
1 files changed, 36 insertions, 37 deletions
diff --git a/drivers/watchdog/mena21_wdt.c b/drivers/watchdog/mena21_wdt.c index 0be7f50e8ff9..6db69883ece6 100644 --- a/drivers/watchdog/mena21_wdt.c +++ b/drivers/watchdog/mena21_wdt.c @@ -13,10 +13,10 @@ #include <linux/platform_device.h> #include <linux/watchdog.h> #include <linux/uaccess.h> -#include <linux/gpio.h> -#include <linux/of_gpio.h> +#include <linux/gpio/consumer.h> #include <linux/delay.h> #include <linux/bitops.h> +#include <linux/of.h> #define NUM_GPIOS 6 @@ -31,7 +31,7 @@ enum a21_wdt_gpios { struct a21_wdt_drv { struct watchdog_device wdt; - unsigned gpios[NUM_GPIOS]; + struct gpio_desc *gpios[NUM_GPIOS]; }; static bool nowayout = WATCHDOG_NOWAYOUT; @@ -43,9 +43,9 @@ static unsigned int a21_wdt_get_bootstatus(struct a21_wdt_drv *drv) { int reset = 0; - reset |= gpio_get_value(drv->gpios[GPIO_WD_RST0]) ? (1 << 0) : 0; - reset |= gpio_get_value(drv->gpios[GPIO_WD_RST1]) ? (1 << 1) : 0; - reset |= gpio_get_value(drv->gpios[GPIO_WD_RST2]) ? (1 << 2) : 0; + reset |= gpiod_get_value(drv->gpios[GPIO_WD_RST0]) ? (1 << 0) : 0; + reset |= gpiod_get_value(drv->gpios[GPIO_WD_RST1]) ? (1 << 1) : 0; + reset |= gpiod_get_value(drv->gpios[GPIO_WD_RST2]) ? (1 << 2) : 0; return reset; } @@ -54,7 +54,7 @@ static int a21_wdt_start(struct watchdog_device *wdt) { struct a21_wdt_drv *drv = watchdog_get_drvdata(wdt); - gpio_set_value(drv->gpios[GPIO_WD_ENAB], 1); + gpiod_set_value(drv->gpios[GPIO_WD_ENAB], 1); return 0; } @@ -63,7 +63,7 @@ static int a21_wdt_stop(struct watchdog_device *wdt) { struct a21_wdt_drv *drv = watchdog_get_drvdata(wdt); - gpio_set_value(drv->gpios[GPIO_WD_ENAB], 0); + gpiod_set_value(drv->gpios[GPIO_WD_ENAB], 0); return 0; } @@ -72,9 +72,9 @@ static int a21_wdt_ping(struct watchdog_device *wdt) { struct a21_wdt_drv *drv = watchdog_get_drvdata(wdt); - gpio_set_value(drv->gpios[GPIO_WD_TRIG], 0); + gpiod_set_value(drv->gpios[GPIO_WD_TRIG], 0); ndelay(10); - gpio_set_value(drv->gpios[GPIO_WD_TRIG], 1); + gpiod_set_value(drv->gpios[GPIO_WD_TRIG], 1); return 0; } @@ -96,9 +96,9 @@ static int a21_wdt_set_timeout(struct watchdog_device *wdt, } if (timeout == 1) - gpio_set_value(drv->gpios[GPIO_WD_FAST], 1); + gpiod_set_value(drv->gpios[GPIO_WD_FAST], 1); else - gpio_set_value(drv->gpios[GPIO_WD_FAST], 0); + gpiod_set_value(drv->gpios[GPIO_WD_FAST], 0); wdt->timeout = timeout; @@ -127,7 +127,6 @@ static struct watchdog_device a21_wdt = { static int a21_wdt_probe(struct platform_device *pdev) { - struct device_node *node; struct a21_wdt_drv *drv; unsigned int reset = 0; int num_gpios; @@ -138,40 +137,40 @@ static int a21_wdt_probe(struct platform_device *pdev) if (!drv) return -ENOMEM; - /* Fill GPIO pin array */ - node = pdev->dev.of_node; - - num_gpios = of_gpio_count(node); + num_gpios = gpiod_count(&pdev->dev, NULL); if (num_gpios != NUM_GPIOS) { dev_err(&pdev->dev, "gpios DT property wrong, got %d want %d", num_gpios, NUM_GPIOS); return -ENODEV; } - for (i = 0; i < num_gpios; i++) { - int val; - - val = of_get_gpio(node, i); - if (val < 0) - return val; - - drv->gpios[i] = val; - } - /* Request the used GPIOs */ for (i = 0; i < num_gpios; i++) { - ret = devm_gpio_request(&pdev->dev, drv->gpios[i], - "MEN A21 Watchdog"); - if (ret) - return ret; + enum gpiod_flags gflags; if (i < GPIO_WD_RST0) - ret = gpio_direction_output(drv->gpios[i], - gpio_get_value(drv->gpios[i])); - else /* GPIO_WD_RST[0..2] are inputs */ - ret = gpio_direction_input(drv->gpios[i]); - if (ret) + gflags = GPIOD_ASIS; + else + gflags = GPIOD_IN; + drv->gpios[i] = devm_gpiod_get_index(&pdev->dev, NULL, i, + gflags); + if (IS_ERR(drv->gpios[i])) { + ret = PTR_ERR(drv->gpios[i]); return ret; + } + + gpiod_set_consumer_name(drv->gpios[i], "MEN A21 Watchdog"); + + /* + * Retrieve the initial value from the GPIOs that should be + * output, then set up the line as output with that value. + */ + if (i < GPIO_WD_RST0) { + int val; + + val = gpiod_get_value(drv->gpios[i]); + gpiod_direction_output(drv->gpios[i], val); + } } watchdog_init_timeout(&a21_wdt, 30, &pdev->dev); @@ -207,7 +206,7 @@ static void a21_wdt_shutdown(struct platform_device *pdev) { struct a21_wdt_drv *drv = dev_get_drvdata(&pdev->dev); - gpio_set_value(drv->gpios[GPIO_WD_ENAB], 0); + gpiod_set_value(drv->gpios[GPIO_WD_ENAB], 0); } static const struct of_device_id a21_wdt_ids[] = { |