54 lines
1.6 KiB
Plaintext
54 lines
1.6 KiB
Plaintext
* 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 */
|
|
};
|