From 0f34f958768c48037ce19cdc5d863a7316a86d44 Mon Sep 17 00:00:00 2001 From: Andrew Jeffery Date: Mon, 28 Aug 2017 09:47:10 +0930 Subject: [PATCH] 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 Acked-by: Pavel Machek Tested-by: Brandon Wyman Signed-off-by: Jacek Anaszewski --- 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 -- 2.20.1