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authorEzequiel Garcia <ezequiel@vanguardiasur.com.ar>2016-04-29 01:03:40 +0300
committerJacek Anaszewski <j.anaszewski@samsung.com>2016-05-06 11:26:07 +0300
commit80d6737b27bbdf645a815c136606836b435f0268 (patch)
tree5a4564508a9380adf07ff33a9a91b8ef51e554a1 /drivers/leds
parente4f4f7091ee6d085c4a84b4023a61483d71bc777 (diff)
downloadlinux-80d6737b27bbdf645a815c136606836b435f0268.tar.xz
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>
Diffstat (limited to 'drivers/leds')
-rw-r--r--drivers/leds/leds-gpio.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/leds/leds-gpio.c b/drivers/leds/leds-gpio.c
index 61143f55597e..8229f063b483 100644
--- a/drivers/leds/leds-gpio.c
+++ b/drivers/leds/leds-gpio.c
@@ -127,6 +127,8 @@ static int create_gpio_led(const struct gpio_led *template,
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 @@ static struct gpio_leds_priv *gpio_leds_create(struct platform_device *pdev)
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);