* 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,-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 */ };