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| author | Ezequiel Garcia <ezequiel@vanguardiasur.com.ar> | 2016-04-29 00:03:40 +0200 |
|---|---|---|
| committer | Jacek Anaszewski <j.anaszewski@samsung.com> | 2016-05-06 10:26:07 +0200 |
| commit | 80d6737b27bbdf645a815c136606836b435f0268 (patch) | |
| tree | 5a4564508a9380adf07ff33a9a91b8ef51e554a1 /drivers/leds | |
| parent | devicetree: leds: Introduce "panic-indicator" optional property (diff) | |
| download | linux-80d6737b27bbdf645a815c136606836b435f0268.tar.xz linux-80d6737b27bbdf645a815c136606836b435f0268.zip | |
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.c | 4 |
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); |