Input: imx_keypad - add device tree support

This patch adds device tree support for imx keypad driver.

Signed-off-by: Liu Ying <Ying.Liu@freescale.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

1 files changed, 53 insertions, 0 deletions

diff --git a/Documentation/devicetree/bindings/input/imx-keypad.txt b/Documentation/devicetree/bindings/input/imx-keypad.txt
new file mode 100644
index 000000000000..2ebaf7d26843
--- /dev/null
+++ b/Documentation/devicetree/bindings/input/imx-keypad.txt
@@ -0,0 +1,53 @@
+* Freescale i.MX Keypad Port(KPP) device tree bindings
+
+The KPP is designed to interface with a keypad matrix with 2-point contact
+or 3-point contact keys. The KPP is designed to simplify the software task
+of scanning a keypad matrix. The KPP is capable of detecting, debouncing,
+and decoding one or multiple keys pressed simultaneously on a keypad.
+
+Required SoC Specific Properties:
+- compatible: Should be "fsl,<soc>-kpp".
+
+- reg: Physical base address of the KPP and length of memory mapped
+  region.
+
+- interrupts: The KPP interrupt number to the CPU(s).
+
+- clocks: The clock provided by the SoC to the KPP. Some SoCs use dummy
+clock(The clock for the KPP is provided by the SoCs automatically).
+
+Required Board Specific Properties:
+- pinctrl-names: The definition can be found at
+pinctrl/pinctrl-bindings.txt.
+
+- pinctrl-0: The definition can be found at
+pinctrl/pinctrl-bindings.txt.
+
+- linux,keymap: The definition can be found at
+bindings/input/matrix-keymap.txt.
+
+Example:
+kpp: kpp@73f94000 {
+        compatible = "fsl,imx51-kpp", "fsl,imx21-kpp";
+        reg = <0x73f94000 0x4000>;
+        interrupts = <60>;
+        clocks = <&clks 0>;
+        pinctrl-names = "default";
+        pinctrl-0 = <&pinctrl_kpp_1>;
+        linux,keymap = <0x00000067      /* KEY_UP */
+                        0x0001006c      /* KEY_DOWN */
+                        0x00020072      /* KEY_VOLUMEDOWN */
+                        0x00030066      /* KEY_HOME */
+                        0x0100006a      /* KEY_RIGHT */
+                        0x01010069      /* KEY_LEFT */
+                        0x0102001c      /* KEY_ENTER */
+                        0x01030073      /* KEY_VOLUMEUP */
+                        0x02000040      /* KEY_F6 */
+                        0x02010042      /* KEY_F8 */
+                        0x02020043      /* KEY_F9 */
+                        0x02030044      /* KEY_F10 */
+                        0x0300003b      /* KEY_F1 */
+                        0x0301003c      /* KEY_F2 */
+                        0x0302003d      /* KEY_F3 */
+                        0x03030074>;    /* KEY_POWER */
+};