linux-kernel - [PATCH v5 2/2] power: reset: document LTC2952 poweroff support

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Message-ID: <1413187513-11178-3-git-send-email-frans.klaver@xsens.com>
Date:	Mon, 13 Oct 2014 10:05:13 +0200
From:	Frans Klaver <frans.klaver@...ns.com>
To:	Sebastian Reichel <sre@...nel.org>
CC:	René Moll <linux@...oll.nl>,
	Tjerk Hofmeijer <tjerk.hofmeijer@...ns.com>,
	Frans Klaver <frans.klaver@...ns.com>,
	Dmitry Eremin-Solenikov <dbaryshkov@...il.com>,
	David Woodhouse <dwmw2@...radead.org>,
	Grant Likely <grant.likely@...aro.org>,
	Rob Herring <robh+dt@...nel.org>,
	Mark Rutland <mark.rutland@....com>,
	Guenter Roeck <linux@...ck-us.net>,
	<linux-kernel@...r.kernel.org>, <linux-pm@...r.kernel.org>,
	<devicetree@...r.kernel.org>
Subject: [PATCH v5 2/2] power: reset: document LTC2952 poweroff support

From: René Moll <linux@...oll.nl>

Signed-off-by: René Moll <linux@...oll.nl>
Signed-off-by: Tjerk Hofmeijer <tjerk.hofmeijer@...ns.com>
Signed-off-by: Frans Klaver <frans.klaver@...ns.com>
---
 .../bindings/power/reset/ltc2952-poweroff.txt      | 30 ++++++++++++++++++++++
 1 file changed, 30 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/power/reset/ltc2952-poweroff.txt

diff --git a/Documentation/devicetree/bindings/power/reset/ltc2952-poweroff.txt b/Documentation/devicetree/bindings/power/reset/ltc2952-poweroff.txt
new file mode 100644
index 0000000..80e58cd
--- /dev/null
+++ b/Documentation/devicetree/bindings/power/reset/ltc2952-poweroff.txt
@@ -0,0 +1,30 @@
+Binding for the LTC2952 PowerPath controller
+
+This chip is used to externally trigger a system shut down. Once the trigger
+has been sent, the chip's watchdog has to be reset to gracefully shut down.
+A full power down can be triggered via the poweroff signal.
+
+Required properties:
+
+- compatible:		Should contain: "lltc,ltc2952"
+- watchdog-gpios:	phandle + gpio-specifier for the GPIO connected to the
+			chip's watchdog line
+- poweroff-gpios:	phandle + gpio-specifier for the GPIO connected to the
+			chip's kill line
+
+Optional properties:
+
+- trigger-gpios:	phandle + gpio-specifier for the GPIO connected to the
+			chip's trigger line. If this property is not set, the
+			trigger function is ignored and the chip is kept alive
+			until an explicit kill signal is received
+
+Example:
+
+ltc2952 {
+	compatible = "lltc,ltc2952";
+
+	trigger-gpios = <&gpio0 1 GPIO_ACTIVE_LOW>;
+	watchdog-gpios = <&gpio1 2 GPIO_ACTIVE_HIGH>;
+	poweroff-gpios = <&gpio0 2 GPIO_ACTIVE_LOW>;
+};
-- 
2.1.0

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