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author | Jamie Lentin <jm@lentin.co.uk> | 2012-11-17 09:51:04 +0100 |
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committer | Jason Cooper <jason@lakedaemon.net> | 2012-11-24 02:56:38 +0000 |
commit | 96ff0f5c7efd4a2205c48a76a6a1fcd2731e6128 (patch) | |
tree | d928f8f738dcc2736d19a6920e5b73bc158f3ae7 /Documentation | |
parent | f4a00139b7cbeff538e616a21f6b57249a9d3ed8 (diff) | |
download | linux-96ff0f5c7efd4a2205c48a76a6a1fcd2731e6128.tar.gz linux-96ff0f5c7efd4a2205c48a76a6a1fcd2731e6128.tar.bz2 linux-96ff0f5c7efd4a2205c48a76a6a1fcd2731e6128.zip |
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')
-rw-r--r-- | Documentation/devicetree/bindings/gpio/gpio-poweroff.txt | 22 |
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 000000000000..558cdf3c9abc --- /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 */ +}; |