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:
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>;
};
#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;
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)) {