diff options
| -rw-r--r-- | Documentation/devicetree/bindings/power/reset/ltc2952-poweroff.txt | 4 | ||||
| -rw-r--r-- | drivers/power/reset/ltc2952-poweroff.c | 8 |
2 files changed, 12 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/power/reset/ltc2952-poweroff.txt b/Documentation/devicetree/bindings/power/reset/ltc2952-poweroff.txt index cd2d7f58a9d7..38e54b3fd9f3 100644 --- a/Documentation/devicetree/bindings/power/reset/ltc2952-poweroff.txt +++ b/Documentation/devicetree/bindings/power/reset/ltc2952-poweroff.txt @@ -17,6 +17,9 @@ Optional properties: chip's trigger line. If this property is not set, the trigger function is ignored and the chip is kept alive until an explicit kill signal is received +- trigger-delay-ms The number of milliseconds to wait after trigger line + assertion before executing shut down procedure. + The default is 2500ms. Example: @@ -24,6 +27,7 @@ ltc2952 { compatible = "lltc,ltc2952"; trigger-gpios = <&gpio0 1 GPIO_ACTIVE_LOW>; + trigger-delay-ms = <2000>; watchdog-gpios = <&gpio1 2 GPIO_ACTIVE_HIGH>; kill-gpios = <&gpio0 2 GPIO_ACTIVE_LOW>; }; diff --git a/drivers/power/reset/ltc2952-poweroff.c b/drivers/power/reset/ltc2952-poweroff.c index 318927938b05..d1495af30081 100644 --- a/drivers/power/reset/ltc2952-poweroff.c +++ b/drivers/power/reset/ltc2952-poweroff.c @@ -55,6 +55,7 @@ #include <linux/mod_devicetable.h> #include <linux/gpio/consumer.h> #include <linux/reboot.h> +#include <linux/property.h> struct ltc2952_poweroff { struct hrtimer timer_trigger; @@ -172,10 +173,17 @@ static void ltc2952_poweroff_default(struct ltc2952_poweroff *data) static int ltc2952_poweroff_init(struct platform_device *pdev) { int ret; + u32 trigger_delay_ms; struct ltc2952_poweroff *data = platform_get_drvdata(pdev); ltc2952_poweroff_default(data); + if (!device_property_read_u32(&pdev->dev, "trigger-delay-ms", + &trigger_delay_ms)) { + data->trigger_delay = ktime_set(trigger_delay_ms / MSEC_PER_SEC, + (trigger_delay_ms % MSEC_PER_SEC) * NSEC_PER_MSEC); + } + data->gpio_watchdog = devm_gpiod_get(&pdev->dev, "watchdog", GPIOD_OUT_LOW); if (IS_ERR(data->gpio_watchdog)) { |