diff options
| author | Jamie Lentin <jm@lentin.co.uk> | 2012-09-14 18:07:06 +0200 |
|---|---|---|
| committer | Jason Cooper <jason@lakedaemon.net> | 2012-09-22 16:40:49 +0200 |
| commit | 55fb8b06813b190a9366fee396fac109638a9c9d (patch) | |
| tree | bdb224ab7df6228fed8ec0e4b716a3ce697ee99c /Documentation | |
| parent | Crypto: CESA: Add support for DT based instantiation. (diff) | |
| download | linux-55fb8b06813b190a9366fee396fac109638a9c9d.tar.xz linux-55fb8b06813b190a9366fee396fac109638a9c9d.zip | |
hwmon: Add devicetree bindings to gpio-fan
Allow a gpio-fan to be defined in devicetree, see binding documentation
for details.
Signed-off-by: Jamie Lentin <jm@lentin.co.uk>
Acked-by: Andrew Lunn <andrew@lunn.ch>
Acked-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Jason Cooper <jason@lakedaemon.net>
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/devicetree/bindings/gpio/gpio-fan.txt | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/gpio/gpio-fan.txt b/Documentation/devicetree/bindings/gpio/gpio-fan.txt new file mode 100644 index 000000000000..2dd457a3469a --- /dev/null +++ b/Documentation/devicetree/bindings/gpio/gpio-fan.txt @@ -0,0 +1,25 @@ +Bindings for fan connected to GPIO lines + +Required properties: +- compatible : "gpio-fan" +- gpios: Specifies the pins that map to bits in the control value, + ordered MSB-->LSB. +- gpio-fan,speed-map: A mapping of possible fan RPM speeds and the + control value that should be set to achieve them. This array + must have the RPM values in ascending order. + +Optional properties: +- alarm-gpios: This pin going active indicates something is wrong with + the fan, and a udev event will be fired. + +Examples: + + gpio_fan { + compatible = "gpio-fan"; + gpios = <&gpio1 14 1 + &gpio1 13 1>; + gpio-fan,speed-map = <0 0 + 3000 1 + 6000 2>; + alarm-gpios = <&gpio1 15 1>; + }; |