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| author | Andrew Jeffery <andrew@aj.id.au> | 2017-08-28 03:17:10 +0300 |
|---|---|---|
| committer | Joel Stanley <joel@jms.id.au> | 2017-11-28 07:21:55 +0300 |
| commit | ccdc47f728d56cc9ee09236757457e1e91f759c4 (patch) | |
| tree | d5ca866629a965372ed8b489f307cb16acdfb9db | |
| parent | ded6374e20fe4975dc020b6f1b2679e7eb434c70 (diff) | |
| download | linux-ccdc47f728d56cc9ee09236757457e1e91f759c4.tar.xz | |
dt-bindings: leds: gpio: Add optional retain-state-shutdown property
On Baseboard Management Controller (BMC) systems it's sometimes
necessary for a LED to retain its state across a BMC reset (which is
independent of the host system state). Add a devicetree property to
describe this behaviour. The property would typically be used in
conjunction with 'default-state = "keep"'.
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>
(cherry picked from commit 0f34f958768c48037ce19cdc5d863a7316a86d44)
Signed-off-by: Joel Stanley <joel@jms.id.au>
| -rw-r--r-- | Documentation/devicetree/bindings/leds/leds-gpio.txt | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/leds/leds-gpio.txt b/Documentation/devicetree/bindings/leds/leds-gpio.txt index 76535ca37120..a48dda268f81 100644 --- a/Documentation/devicetree/bindings/leds/leds-gpio.txt +++ b/Documentation/devicetree/bindings/leds/leds-gpio.txt @@ -18,6 +18,9 @@ LED sub-node properties: see Documentation/devicetree/bindings/leds/common.txt - retain-state-suspended: (optional) The suspend state can be retained.Such as charge-led gpio. +- retain-state-shutdown: (optional) Retain the state of the LED on shutdown. + Useful in BMC systems, for example when the BMC is rebooted while the host + remains up. - panic-indicator : (optional) see Documentation/devicetree/bindings/leds/common.txt |