diff options
| -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 @@ | |||
| 13 | #include <linux/platform_device.h> | 13 | #include <linux/platform_device.h> |
| 14 | #include <linux/watchdog.h> | 14 | #include <linux/watchdog.h> |
| 15 | #include <linux/uaccess.h> | 15 | #include <linux/uaccess.h> |
| 16 | #include <linux/gpio.h> | 16 | #include <linux/gpio/consumer.h> |
| 17 | #include <linux/of_gpio.h> | ||
| 18 | #include <linux/delay.h> | 17 | #include <linux/delay.h> |
| 19 | #include <linux/bitops.h> | 18 | #include <linux/bitops.h> |
| 19 | #include <linux/of.h> | ||
| 20 | 20 | ||
| 21 | #define NUM_GPIOS 6 | 21 | #define NUM_GPIOS 6 |
| 22 | 22 | ||
| @@ -31,7 +31,7 @@ enum a21_wdt_gpios { | |||
| 31 | 31 | ||
| 32 | struct a21_wdt_drv { | 32 | struct a21_wdt_drv { |
| 33 | struct watchdog_device wdt; | 33 | struct watchdog_device wdt; |
| 34 | unsigned gpios[NUM_GPIOS]; | 34 | struct gpio_desc *gpios[NUM_GPIOS]; |
| 35 | }; | 35 | }; |
| 36 | 36 | ||
| 37 | static bool nowayout = WATCHDOG_NOWAYOUT; | 37 | static bool nowayout = WATCHDOG_NOWAYOUT; |
| @@ -43,9 +43,9 @@ static unsigned int a21_wdt_get_bootstatus(struct a21_wdt_drv *drv) | |||
| 43 | { | 43 | { |
| 44 | int reset = 0; | 44 | int reset = 0; |
| 45 | 45 | ||
| 46 | reset |= gpio_get_value(drv->gpios[GPIO_WD_RST0]) ? (1 << 0) : 0; | 46 | reset |= gpiod_get_value(drv->gpios[GPIO_WD_RST0]) ? (1 << 0) : 0; |
| 47 | reset |= gpio_get_value(drv->gpios[GPIO_WD_RST1]) ? (1 << 1) : 0; | 47 | reset |= gpiod_get_value(drv->gpios[GPIO_WD_RST1]) ? (1 << 1) : 0; |
| 48 | reset |= gpio_get_value(drv->gpios[GPIO_WD_RST2]) ? (1 << 2) : 0; | 48 | reset |= gpiod_get_value(drv->gpios[GPIO_WD_RST2]) ? (1 << 2) : 0; |
| 49 | 49 | ||
| 50 | return reset; | 50 | return reset; |
| 51 | } | 51 | } |
| @@ -54,7 +54,7 @@ static int a21_wdt_start(struct watchdog_device *wdt) | |||
| 54 | { | 54 | { |
| 55 | struct a21_wdt_drv *drv = watchdog_get_drvdata(wdt); | 55 | struct a21_wdt_drv *drv = watchdog_get_drvdata(wdt); |
| 56 | 56 | ||
| 57 | gpio_set_value(drv->gpios[GPIO_WD_ENAB], 1); | 57 | gpiod_set_value(drv->gpios[GPIO_WD_ENAB], 1); |
| 58 | 58 | ||
| 59 | return 0; | 59 | return 0; |
| 60 | } | 60 | } |
| @@ -63,7 +63,7 @@ static int a21_wdt_stop(struct watchdog_device *wdt) | |||
| 63 | { | 63 | { |
| 64 | struct a21_wdt_drv *drv = watchdog_get_drvdata(wdt); | 64 | struct a21_wdt_drv *drv = watchdog_get_drvdata(wdt); |
| 65 | 65 | ||
| 66 | gpio_set_value(drv->gpios[GPIO_WD_ENAB], 0); | 66 | gpiod_set_value(drv->gpios[GPIO_WD_ENAB], 0); |
| 67 | 67 | ||
| 68 | return 0; | 68 | return 0; |
| 69 | } | 69 | } |
| @@ -72,9 +72,9 @@ static int a21_wdt_ping(struct watchdog_device *wdt) | |||
| 72 | { | 72 | { |
| 73 | struct a21_wdt_drv *drv = watchdog_get_drvdata(wdt); | 73 | struct a21_wdt_drv *drv = watchdog_get_drvdata(wdt); |
| 74 | 74 | ||
| 75 | gpio_set_value(drv->gpios[GPIO_WD_TRIG], 0); | 75 | gpiod_set_value(drv->gpios[GPIO_WD_TRIG], 0); |
| 76 | ndelay(10); | 76 | ndelay(10); |
| 77 | gpio_set_value(drv->gpios[GPIO_WD_TRIG], 1); | 77 | gpiod_set_value(drv->gpios[GPIO_WD_TRIG], 1); |
| 78 | 78 | ||
| 79 | return 0; | 79 | return 0; |
| 80 | } | 80 | } |
| @@ -96,9 +96,9 @@ static int a21_wdt_set_timeout(struct watchdog_device *wdt, | |||
| 96 | } | 96 | } |
| 97 | 97 | ||
| 98 | if (timeout == 1) | 98 | if (timeout == 1) |
| 99 | gpio_set_value(drv->gpios[GPIO_WD_FAST], 1); | 99 | gpiod_set_value(drv->gpios[GPIO_WD_FAST], 1); |
| 100 | else | 100 | else |
| 101 | gpio_set_value(drv->gpios[GPIO_WD_FAST], 0); | 101 | gpiod_set_value(drv->gpios[GPIO_WD_FAST], 0); |
| 102 | 102 | ||
| 103 | wdt->timeout = timeout; | 103 | wdt->timeout = timeout; |
| 104 | 104 | ||
| @@ -127,7 +127,6 @@ static struct watchdog_device a21_wdt = { | |||
| 127 | 127 | ||
| 128 | static int a21_wdt_probe(struct platform_device *pdev) | 128 | static int a21_wdt_probe(struct platform_device *pdev) |
| 129 | { | 129 | { |
| 130 | struct device_node *node; | ||
| 131 | struct a21_wdt_drv *drv; | 130 | struct a21_wdt_drv *drv; |
| 132 | unsigned int reset = 0; | 131 | unsigned int reset = 0; |
| 133 | int num_gpios; | 132 | int num_gpios; |
| @@ -138,40 +137,40 @@ static int a21_wdt_probe(struct platform_device *pdev) | |||
| 138 | if (!drv) | 137 | if (!drv) |
| 139 | return -ENOMEM; | 138 | return -ENOMEM; |
| 140 | 139 | ||
| 141 | /* Fill GPIO pin array */ | 140 | num_gpios = gpiod_count(&pdev->dev, NULL); |
| 142 | node = pdev->dev.of_node; | ||
| 143 | |||
| 144 | num_gpios = of_gpio_count(node); | ||
| 145 | if (num_gpios != NUM_GPIOS) { | 141 | if (num_gpios != NUM_GPIOS) { |
| 146 | dev_err(&pdev->dev, "gpios DT property wrong, got %d want %d", | 142 | dev_err(&pdev->dev, "gpios DT property wrong, got %d want %d", |
| 147 | num_gpios, NUM_GPIOS); | 143 | num_gpios, NUM_GPIOS); |
| 148 | return -ENODEV; | 144 | return -ENODEV; |
| 149 | } | 145 | } |
| 150 | 146 | ||
| 151 | for (i = 0; i < num_gpios; i++) { | ||
| 152 | int val; | ||
| 153 | |||
| 154 | val = of_get_gpio(node, i); | ||
| 155 | if (val < 0) | ||
| 156 | return val; | ||
| 157 | |||
| 158 | drv->gpios[i] = val; | ||
| 159 | } | ||
| 160 | |||
| 161 | /* Request the used GPIOs */ | 147 | /* Request the used GPIOs */ |
| 162 | for (i = 0; i < num_gpios; i++) { | 148 | for (i = 0; i < num_gpios; i++) { |
| 163 | ret = devm_gpio_request(&pdev->dev, drv->gpios[i], | 149 | enum gpiod_flags gflags; |
| 164 | "MEN A21 Watchdog"); | ||
| 165 | if (ret) | ||
| 166 | return ret; | ||
| 167 | 150 | ||
| 168 | if (i < GPIO_WD_RST0) | 151 | if (i < GPIO_WD_RST0) |
| 169 | ret = gpio_direction_output(drv->gpios[i], | 152 | gflags = GPIOD_ASIS; |
| 170 | gpio_get_value(drv->gpios[i])); | 153 | else |
| 171 | else /* GPIO_WD_RST[0..2] are inputs */ | 154 | gflags = GPIOD_IN; |
| 172 | ret = gpio_direction_input(drv->gpios[i]); | 155 | drv->gpios[i] = devm_gpiod_get_index(&pdev->dev, NULL, i, |
| 173 | if (ret) | 156 | gflags); |
| 157 | if (IS_ERR(drv->gpios[i])) { | ||
| 158 | ret = PTR_ERR(drv->gpios[i]); | ||
| 174 | return ret; | 159 | return ret; |
| 160 | } | ||
| 161 | |||
| 162 | gpiod_set_consumer_name(drv->gpios[i], "MEN A21 Watchdog"); | ||
| 163 | |||
| 164 | /* | ||
| 165 | * Retrieve the initial value from the GPIOs that should be | ||
| 166 | * output, then set up the line as output with that value. | ||
| 167 | */ | ||
| 168 | if (i < GPIO_WD_RST0) { | ||
| 169 | int val; | ||
| 170 | |||
| 171 | val = gpiod_get_value(drv->gpios[i]); | ||
| 172 | gpiod_direction_output(drv->gpios[i], val); | ||
| 173 | } | ||
| 175 | } | 174 | } |
| 176 | 175 | ||
| 177 | watchdog_init_timeout(&a21_wdt, 30, &pdev->dev); | 176 | watchdog_init_timeout(&a21_wdt, 30, &pdev->dev); |
| @@ -207,7 +206,7 @@ static void a21_wdt_shutdown(struct platform_device *pdev) | |||
| 207 | { | 206 | { |
| 208 | struct a21_wdt_drv *drv = dev_get_drvdata(&pdev->dev); | 207 | struct a21_wdt_drv *drv = dev_get_drvdata(&pdev->dev); |
| 209 | 208 | ||
| 210 | gpio_set_value(drv->gpios[GPIO_WD_ENAB], 0); | 209 | gpiod_set_value(drv->gpios[GPIO_WD_ENAB], 0); |
| 211 | } | 210 | } |
| 212 | 211 | ||
| 213 | static const struct of_device_id a21_wdt_ids[] = { | 212 | static const struct of_device_id a21_wdt_ids[] = { |
