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| author | Andrew Jeffery <andrew@aj.id.au> | 2017-08-28 09:47:10 +0930 |
|---|---|---|
| committer | Jacek Anaszewski <jacek.anaszewski@gmail.com> | 2017-08-29 21:10:40 +0200 |
| commit | 0f34f958768c48037ce19cdc5d863a7316a86d44 (patch) | |
| tree | c04bcf700b2b1769b052cf86a6a7a89e439ecf66 /Documentation | |
| parent | 30f21ef22b7b7e1156cc2a7f9e714c002938f056 (diff) | |
| download | linux-0-day-0f34f958768c48037ce19cdc5d863a7316a86d44.tar.gz linux-0-day-0f34f958768c48037ce19cdc5d863a7316a86d44.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>
Diffstat (limited to 'Documentation')
| -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 76535ca371209..a48dda268f81b 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 |