summaryrefslogtreecommitdiffstats
path: root/Documentation/devicetree
diff options
context:
space:
mode:
authorJamie Lentin <jm@lentin.co.uk>2012-11-17 09:51:04 +0100
committerJason Cooper <jason@lakedaemon.net>2012-11-24 02:56:38 +0000
commit96ff0f5c7efd4a2205c48a76a6a1fcd2731e6128 (patch)
treed928f8f738dcc2736d19a6920e5b73bc158f3ae7 /Documentation/devicetree
parentf4a00139b7cbeff538e616a21f6b57249a9d3ed8 (diff)
downloadop-kernel-dev-96ff0f5c7efd4a2205c48a76a6a1fcd2731e6128.zip
op-kernel-dev-96ff0f5c7efd4a2205c48a76a6a1fcd2731e6128.tar.gz
power: Add simple poweroff-gpio driver
Given appropriate devicetree bindings, this driver registers a pm_power_off function to set a GPIO line high/low to power down your board. Signed-off-by: Jamie Lentin <jm@lentin.co.uk> Signed-off-by: Andrew Lunn <andrew@lunn.ch> Tested-by:Simon Baatz <gmbnomis@gmail.com> Signed-off-by: Jason Cooper <jason@lakedaemon.net>
Diffstat (limited to 'Documentation/devicetree')
-rw-r--r--Documentation/devicetree/bindings/gpio/gpio-poweroff.txt22
1 files changed, 22 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/gpio/gpio-poweroff.txt b/Documentation/devicetree/bindings/gpio/gpio-poweroff.txt
new file mode 100644
index 0000000..558cdf3
--- /dev/null
+++ b/Documentation/devicetree/bindings/gpio/gpio-poweroff.txt
@@ -0,0 +1,22 @@
+GPIO line that should be set high/low to power off a device
+
+Required properties:
+- compatible : should be "gpio-poweroff".
+- gpios : The GPIO to set high/low, see "gpios property" in
+ Documentation/devicetree/bindings/gpio/gpio.txt. If the pin should be
+ low to power down the board set it to "Active Low", otherwise set
+ gpio to "Active High".
+
+Optional properties:
+- input : Initially configure the GPIO line as an input. Only reconfigure
+ it to an output when the pm_power_off function is called. If this optional
+ property is not specified, the GPIO is initialized as an output in its
+ inactive state.
+
+
+Examples:
+
+gpio-poweroff {
+ compatible = "gpio-poweroff";
+ gpios = <&gpio 4 0>; /* GPIO 4 Active Low */
+};
OpenPOWER on IntegriCloud