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Groups > linux.kernel > #1719772
| From | Andrew Jeffery <andrew@aj.id.au> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | [PATCH 1/2] dt-bindings: leds: gpio: Add optional retain-state-shutdown property |
| Date | 2017-08-25 08:40 +0200 |
| Message-ID | <uigrD-xp-5@gated-at.bofh.it> (permalink) |
| References | <uigrD-xp-7@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
On 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> --- Documentation/devicetree/bindings/leds/leds-gpio.txt | 3 +++ 1 file changed, 3 insertions(+) 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 -- 2.11.0
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[PATCH 1/2] dt-bindings: leds: gpio: Add optional retain-state-shutdown property Andrew Jeffery <andrew@aj.id.au> - 2017-08-25 08:40 +0200
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