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1* ST Keyscan controller Device Tree bindings2 3The ST keyscan controller Device Tree binding is based on the4matrix-keymap.5 6Required properties:7- compatible: "st,sti-keyscan"8 9- reg: Register base address and size of st-keyscan controller.10 11- interrupts: Interrupt number for the st-keyscan controller.12 13- clocks: Must contain one entry, for the module clock.14 See ../clocks/clock-bindings.txt for details.15 16- pinctrl: Should specify pin control groups used for this controller.17 See ../pinctrl/pinctrl-bindings.txt for details.18 19- linux,keymap: The keymap for keys as described in the binding document20 devicetree/bindings/input/matrix-keymap.txt.21 22- keypad,num-rows: Number of row lines connected to the keypad controller.23 24- keypad,num-columns: Number of column lines connected to the keypad25 controller.26 27Optional property:28- st,debounce_us: Debouncing interval time in microseconds29 30Example:31 32keyscan: keyscan@fe4b0000 {33 compatible = "st,sti-keyscan";34 reg = <0xfe4b0000 0x2000>;35 interrupts = <GIC_SPI 212 IRQ_TYPE_NONE>;36 clocks = <&CLK_SYSIN>;37 pinctrl-names = "default";38 pinctrl-0 = <&pinctrl_keyscan>;39 40 keypad,num-rows = <4>;41 keypad,num-columns = <4>;42 st,debounce_us = <5000>;43 44 linux,keymap = < MATRIX_KEY(0x00, 0x00, KEY_F13)45 MATRIX_KEY(0x00, 0x01, KEY_F9)46 MATRIX_KEY(0x00, 0x02, KEY_F5)47 MATRIX_KEY(0x00, 0x03, KEY_F1)48 MATRIX_KEY(0x01, 0x00, KEY_F14)49 MATRIX_KEY(0x01, 0x01, KEY_F10)50 MATRIX_KEY(0x01, 0x02, KEY_F6)51 MATRIX_KEY(0x01, 0x03, KEY_F2)52 MATRIX_KEY(0x02, 0x00, KEY_F15)53 MATRIX_KEY(0x02, 0x01, KEY_F11)54 MATRIX_KEY(0x02, 0x02, KEY_F7)55 MATRIX_KEY(0x02, 0x03, KEY_F3)56 MATRIX_KEY(0x03, 0x00, KEY_F16)57 MATRIX_KEY(0x03, 0x01, KEY_F12)58 MATRIX_KEY(0x03, 0x02, KEY_F8)59 MATRIX_KEY(0x03, 0x03, KEY_F4) >;60 };61