As per commit 916fe61995 ("leds: trigger: Introduce a kernel panic LED
trigger"), the kernel now supports a new LED trigger to hook on
the panic blink.
However, the only way of using this is to dedicate a LED device
to this function.
To overcome this limitation, the present series introduces the
capability to switch the LED trigger of certain LED devices upon
a kernel panic (using the panic notifier).
The decision of which LEDs should be switched to the panic trigger
is left to each LED device driver. As an example, a devicetree
boolean property is introduced and used in the leds-gpio driver.
Feedback and other ideas on how to implement this are most welcomed.
Ezequiel Garcia (5):
leds: triggers: Allow to switch the trigger to "panic" on a kernel
panic
leds: triggers: Add a led_trigger_event_nosleep API
leds: trigger: panic: Use led_trigger_event_nosleep
devicetree: leds: Introduce "panic-blink" optional property
leds: gpio: Support the panic-blink firmware property
Documentation/devicetree/bindings/leds/common.txt | 2 +
drivers/leds/led-triggers.c | 78 +++++++++++++++++++++--
drivers/leds/leds-gpio.c | 4 ++
drivers/leds/trigger/ledtrig-panic.c | 2 +-
include/linux/leds.h | 6 ++
5 files changed, 87 insertions(+), 5 deletions(-)
--
2.7.0
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