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[v3,2/2] power: reset: document LTC2952 poweroff support

Message ID 1412584836-27677-3-git-send-email-frans.klaver@xsens.com
State Superseded, archived
Headers show

Commit Message

Frans Klaver Oct. 6, 2014, 8:40 a.m. UTC 
From: René Moll <linux@r-moll.nl>

Signed-off-by: René Moll <linux@r-moll.nl>
Signed-off-by: Tjerk Hofmeijer <tjerk.hofmeijer@xsens.com>
Signed-off-by: Frans Klaver <frans.klaver@xsens.com>
---
 .../bindings/power/reset/ltc2952-poweroff.txt      | 31 ++++++++++++++++++++++
 1 file changed, 31 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/power/reset/ltc2952-poweroff.txt
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Patch

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..3d15814
--- /dev/null
+++ b/Documentation/devicetree/bindings/power/reset/ltc2952-poweroff.txt
@@ -0,0 +1,31 @@ 
+Binding for the LTC2952 PowerPath controller
+
+This chip is used to externally trigger a system shut down. Once the trigger has
+been sent, the chips' watchdog has to be reset to gracefully shut down.
+If the Linux systems decides to shut down it powers off the platform via the
+kill signal.
+
+Required properties:
+
+- compatible:		Must contain: "lltc,ltc2952"
+- watchdog-gpios:	phandle + gpio-specifier for the GPIO connected to the
+			chip's watchdog line
+- kill-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>;
+	kill-gpios = <&gpio0 2 GPIO_ACTIVE_LOW>;
+};