From mboxrd@z Thu Jan 1 00:00:00 1970 From: Andrew Jeffery Subject: [PATCH v2 1/2] dt-bindings: leds: gpio: Add optional retain-state-shutdown property Date: Mon, 28 Aug 2017 09:47:10 +0930 Message-ID: <20170828001711.19662-2-andrew@aj.id.au> References: <20170828001711.19662-1-andrew@aj.id.au> Return-path: In-Reply-To: <20170828001711.19662-1-andrew@aj.id.au> Sender: linux-kernel-owner@vger.kernel.org To: linux-leds@vger.kernel.org Cc: Andrew Jeffery , rpurdie@rpsys.net, jacek.anaszewski@gmail.com, pavel@ucw.cz, robh+dt@kernel.org, mark.rutland@arm.com, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, joel@jms.id.au, openbmc@lists.ozlabs.org List-Id: devicetree@vger.kernel.org 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 --- 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