projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 0e14235e LY |
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 | }; |