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leds: gpio: Support the "panic-indicator" firmware property

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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>
This commit is contained in:
Ezequiel Garcia 2016-04-28 19:03:40 -03:00 • committed by Jacek Anaszewski
parent e4f4f7091e
commit 80d6737b27
3 changed files with 7 additions and 0 deletions
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1
include/linux/leds.h
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@ -365,6 +365,7 @@ struct gpio_led {
unsigned gpio;
unsigned active_low : 1;
unsigned retain_state_suspended : 1;
unsigned panic_indicator : 1;
unsigned default_state : 2;
/* default_state should be one of LEDS_GPIO_DEFSTATE_(ON|OFF|KEEP) */
struct gpio_desc *gpiod;