| Liu Ying | 0e14235 | 2013-01-03 12:25:46 -0800 | [diff] [blame] | 1 | * Freescale i.MX Keypad Port(KPP) device tree bindings |
| 2 | |
| 3 | The KPP is designed to interface with a keypad matrix with 2-point contact |
| 4 | or 3-point contact keys. The KPP is designed to simplify the software task |
| 5 | of scanning a keypad matrix. The KPP is capable of detecting, debouncing, |
| 6 | and decoding one or multiple keys pressed simultaneously on a keypad. |
| 7 | |
| 8 | Required 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 |
| 17 | clock(The clock for the KPP is provided by the SoCs automatically). |
| 18 | |
| 19 | Required Board Specific Properties: |
| 20 | - pinctrl-names: The definition can be found at |
| 21 | pinctrl/pinctrl-bindings.txt. |
| 22 | |
| 23 | - pinctrl-0: The definition can be found at |
| 24 | pinctrl/pinctrl-bindings.txt. |
| 25 | |
| 26 | - linux,keymap: The definition can be found at |
| 27 | bindings/input/matrix-keymap.txt. |
| 28 | |
| 29 | Example: |
| 30 | kpp: 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 | }; |