1* Freescale i.MX Keypad Port(KPP) device tree bindings 2 3The KPP is designed to interface with a keypad matrix with 2-point contact 4or 3-point contact keys. The KPP is designed to simplify the software task 5of scanning a keypad matrix. The KPP is capable of detecting, debouncing, 6and decoding one or multiple keys pressed simultaneously on a keypad. 7 8Required SoC Specific Properties: 9- compatible: Should be "fsl,<soc>-kpp". 10 11- reg: Physical base address of the KPP and length of memory mapped 12 region. 13 14- interrupts: The KPP interrupt number to the CPU(s). 15 16- clocks: The clock provided by the SoC to the KPP. Some SoCs use dummy 17clock(The clock for the KPP is provided by the SoCs automatically). 18 19Required Board Specific Properties: 20- pinctrl-names: The definition can be found at 21pinctrl/pinctrl-bindings.txt. 22 23- pinctrl-0: The definition can be found at 24pinctrl/pinctrl-bindings.txt. 25 26- linux,keymap: The definition can be found at 27bindings/input/matrix-keymap.txt. 28 29Example: 30kpp: kpp@73f94000 { 31 compatible = "fsl,imx51-kpp", "fsl,imx21-kpp"; 32 reg = <0x73f94000 0x4000>; 33 interrupts = <60>; 34 clocks = <&clks 0>; 35 pinctrl-names = "default"; 36 pinctrl-0 = <&pinctrl_kpp_1>; 37 linux,keymap = <0x00000067 /* KEY_UP */ 38 0x0001006c /* KEY_DOWN */ 39 0x00020072 /* KEY_VOLUMEDOWN */ 40 0x00030066 /* KEY_HOME */ 41 0x0100006a /* KEY_RIGHT */ 42 0x01010069 /* KEY_LEFT */ 43 0x0102001c /* KEY_ENTER */ 44 0x01030073 /* KEY_VOLUMEUP */ 45 0x02000040 /* KEY_F6 */ 46 0x02010042 /* KEY_F8 */ 47 0x02020043 /* KEY_F9 */ 48 0x02030044 /* KEY_F10 */ 49 0x0300003b /* KEY_F1 */ 50 0x0301003c /* KEY_F2 */ 51 0x0302003d /* KEY_F3 */ 52 0x03030074>; /* KEY_POWER */ 53}; 54