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authorDavid Jander <david@protonic.nl>2011-07-09 12:41:46 -0700
committerDmitry Torokhov <dmitry.torokhov@gmail.com>2011-07-10 16:08:28 -0700
commitfd05d08920b54d189aa247c5c5701a08e539ed0b (patch)
tree875b9b1bb3c055e955fec0d7342939e5965cc16c /Documentation/devicetree
parenteadba0c9c41bfa840b0f1e9ee369a869c2a322b3 (diff)
downloadop-kernel-dev-fd05d08920b54d189aa247c5c5701a08e539ed0b.zip
op-kernel-dev-fd05d08920b54d189aa247c5c5701a08e539ed0b.tar.gz
Input: gpio_keys - add support for device-tree platform data
This patch enables fetching configuration data, which is normally provided via platform_data, from the device-tree instead. If the device is configured from device-tree data, the platform_data struct is not used, and button data needs to be allocated dynamically. Big part of this patch deals with confining pdata usage to the probe function, to make this possible. Signed-off-by: David Jander <david@protonic.nl> Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
Diffstat (limited to 'Documentation/devicetree')
-rw-r--r--Documentation/devicetree/bindings/gpio/gpio_keys.txt36
1 files changed, 36 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/gpio/gpio_keys.txt b/Documentation/devicetree/bindings/gpio/gpio_keys.txt
new file mode 100644
index 0000000..7190c99
--- /dev/null
+++ b/Documentation/devicetree/bindings/gpio/gpio_keys.txt
@@ -0,0 +1,36 @@
+Device-Tree bindings for input/gpio_keys.c keyboard driver
+
+Required properties:
+ - compatible = "gpio-keys";
+
+Optional properties:
+ - autorepeat: Boolean, Enable auto repeat feature of Linux input
+ subsystem.
+
+Each button (key) is represented as a sub-node of "gpio-keys":
+Subnode properties:
+
+ - gpios: OF devcie-tree gpio specificatin.
+ - label: Descriptive name of the key.
+ - linux,code: Keycode to emit.
+
+Optional subnode-properties:
+ - linux,input-type: Specify event type this button/key generates.
+ If not specified defaults to <1> == EV_KEY.
+ - debounce-interval: Debouncing interval time in milliseconds.
+ If not specified defaults to 5.
+ - gpio-key,wakeup: Boolean, button can wake-up the system.
+
+Example nodes:
+
+ gpio_keys {
+ compatible = "gpio-keys";
+ #address-cells = <1>;
+ #size-cells = <0>;
+ autorepeat;
+ button@21 {
+ label = "GPIO Key UP";
+ linux,code = <103>;
+ gpios = <&gpio1 0 1>;
+ };
+ ...
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