2 files changed, 75 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 */
+};
diff --git a/Documentation/devicetree/bindings/input/nvidia,tegra20-kbc.txt b/Documentation/devicetree/bindings/input/nvidia,tegra20-kbc.txt
index 72683be6de35..2995fae7ee47 100644
--- a/Documentation/devicetree/bindings/input/nvidia,tegra20-kbc.txt
+++ b/Documentation/devicetree/bindings/input/nvidia,tegra20-kbc.txt
@@ -1,7 +1,18 @@
 * Tegra keyboard controller
+The key controller has maximum 24 pins to make matrix keypad. Any pin
+can be configured as row or column. The maximum column pin can be 8
+and maximum row pins can be 16 for Tegra20/Tegra30.
 
 Required properties:
 - compatible: "nvidia,tegra20-kbc"
+- reg: Register base address of KBC.
+- interrupts: Interrupt number for the KBC.
+- nvidia,kbc-row-pins: The KBC pins which are configured as row. This is an
+  array of pin numbers which is used as rows.
+- nvidia,kbc-col-pins: The KBC pins which are configured as column. This is an
+  array of pin numbers which is used as column.
+- linux,keymap: The keymap for keys as described in the binding document
+  devicetree/bindings/input/matrix-keymap.txt.
 
 Optional properties, in addition to those specified by the shared
 matrix-keyboard bindings:
@@ -19,5 +30,16 @@ Example:
 keyboard: keyboard {
         compatible = "nvidia,tegra20-kbc";
         reg = <0x7000e200 0x100>;
+        interrupts = <0 85 0x04>;
         nvidia,ghost-filter;
+        nvidia,debounce-delay-ms = <640>;
+        nvidia,kbc-row-pins = <0 1 2>;    /* pin 0, 1, 2 as rows */
+        nvidia,kbc-col-pins = <11 12 13>; /* pin 11, 12, 13 as columns */
+        linux,keymap = <0x00000074
+                        0x00010067
+                        0x00020066
+                        0x01010068
+                        0x02000069
+                        0x02010070
+                        0x02020071>;
 };