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| author |   Andrew Jeffery <andrew@aj.id.au> | 2017-08-28 09:47:11 +0930 |
|---|---|---|
| committer |   Jacek Anaszewski <jacek.anaszewski@gmail.com> | 2017-08-29 21:10:40 +0200 |
| commit | f5808ac158f2b16b686a3d3c0879c5d6048aba14 (patch) | |
| tree | e223e075b1e3b1877d644c2104effb193077c4eb /include/linux/leds.h | |
| parent | dt-bindings: leds: gpio: Add optional retain-state-shutdown property (diff) | |
| download | linux-dev-f5808ac158f2b16b686a3d3c0879c5d6048aba14.tar.xz linux-dev-f5808ac158f2b16b686a3d3c0879c5d6048aba14.zip | |
leds: gpio: Allow LED to retain state at shutdown
In some systems, such as Baseboard Management Controllers (BMCs), we
want to retain the state of LEDs across a reboot of the BMC (whilst the
host remains up). Implement support for the retain-state-shutdown
devicetree property in leds-gpio.
Signed-off-by: Andrew Jeffery <andrew@aj.id.au>
Acked-by: Pavel Machek <pavel@ucw.cz>
Tested-by: Brandon Wyman <bjwyman@gmail.com>
Signed-off-by: Jacek Anaszewski <jacek.anaszewski@gmail.com>
Diffstat (limited to 'include/linux/leds.h')
| -rw-r--r-- | include/linux/leds.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/leds.h b/include/linux/leds.h index 64c56d454f7d..bf6db4fe895b 100644 --- a/include/linux/leds.h +++ b/include/linux/leds.h @@ -49,6 +49,7 @@ struct led_classdev { #define LED_HW_PLUGGABLE (1 << 19) #define LED_PANIC_INDICATOR (1 << 20) #define LED_BRIGHT_HW_CHANGED (1 << 21) +#define LED_RETAIN_AT_SHUTDOWN (1 << 22) /* set_brightness_work / blink_timer flags, atomic, private. */ unsigned long work_flags; @@ -392,6 +393,7 @@ struct gpio_led { unsigned retain_state_suspended : 1; unsigned panic_indicator : 1; unsigned default_state : 2; + unsigned retain_state_shutdown : 1; /* default_state should be one of LEDS_GPIO_DEFSTATE_(ON|OFF|KEEP) */ struct gpio_desc *gpiod; }; |