leds: gpio: Support the "panic-indicator" firmware property
Calling a GPIO LEDs is quite likely to work even if the kernel
has paniced, so they are ideal to blink in this situation.
This commit adds support for the new "panic-indicator"
firmware property, allowing to mark a given LED to blink on
a kernel panic.
Signed-off-by: Ezequiel Garcia <ezequiel@vanguardiasur.com.ar>
Reviewed-by: Matthias Brugger <mbrugger@suse.com>
Acked-by: Pavel Machek <pavel@ucw.cz>
Signed-off-by: Jacek Anaszewski <j.anaszewski@samsung.com>
diff --git a/drivers/leds/leds-gpio.c b/drivers/leds/leds-gpio.c
index 61143f5..8229f06 100644
--- a/drivers/leds/leds-gpio.c
+++ b/drivers/leds/leds-gpio.c
@@ -127,6 +127,8 @@
led_dat->cdev.brightness = state ? LED_FULL : LED_OFF;
if (!template->retain_state_suspended)
led_dat->cdev.flags |= LED_CORE_SUSPENDRESUME;
+ if (template->panic_indicator)
+ led_dat->cdev.flags |= LED_PANIC_INDICATOR;
ret = gpiod_direction_output(led_dat->gpiod, state);
if (ret < 0)
@@ -200,6 +202,8 @@
if (fwnode_property_present(child, "retain-state-suspended"))
led.retain_state_suspended = 1;
+ if (fwnode_property_present(child, "panic-indicator"))
+ led.panic_indicator = 1;
ret = create_gpio_led(&led, &priv->leds[priv->num_leds],
dev, NULL);