* Freescale i.MX Keypad Port(KPP) device tree bindings
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The KPP is designed to interface with a keypad matrix with 2-point contact
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or 3-point contact keys. The KPP is designed to simplify the software task
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of scanning a keypad matrix. The KPP is capable of detecting, debouncing,
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and decoding one or multiple keys pressed simultaneously on a keypad.
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Required SoC Specific Properties:
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- compatible: Should be "fsl,<soc>-kpp".
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- reg: Physical base address of the KPP and length of memory mapped
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region.
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- interrupts: The KPP interrupt number to the CPU(s).
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- clocks: The clock provided by the SoC to the KPP. Some SoCs use dummy
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clock(The clock for the KPP is provided by the SoCs automatically).
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Required Board Specific Properties:
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- pinctrl-names: The definition can be found at
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pinctrl/pinctrl-bindings.txt.
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- pinctrl-0: The definition can be found at
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pinctrl/pinctrl-bindings.txt.
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- linux,keymap: The definition can be found at
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bindings/input/matrix-keymap.txt.
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Example:
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kpp: kpp@73f94000 {
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compatible = "fsl,imx51-kpp", "fsl,imx21-kpp";
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reg = <0x73f94000 0x4000>;
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interrupts = <60>;
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clocks = <&clks 0>;
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pinctrl-names = "default";
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pinctrl-0 = <&pinctrl_kpp_1>;
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linux,keymap = <0x00000067 /* KEY_UP */
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0x0001006c /* KEY_DOWN */
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0x00020072 /* KEY_VOLUMEDOWN */
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0x00030066 /* KEY_HOME */
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0x0100006a /* KEY_RIGHT */
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0x01010069 /* KEY_LEFT */
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0x0102001c /* KEY_ENTER */
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0x01030073 /* KEY_VOLUMEUP */
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0x02000040 /* KEY_F6 */
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0x02010042 /* KEY_F8 */
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0x02020043 /* KEY_F9 */
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0x02030044 /* KEY_F10 */
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0x0300003b /* KEY_F1 */
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0x0301003c /* KEY_F2 */
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0x0302003d /* KEY_F3 */
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0x03030074>; /* KEY_POWER */
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};
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