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1* TWL4030's Keypad Controller device tree bindings2 3TWL4030's Keypad controller is used to interface a SoC with a matrix-type4keypad device. The keypad controller supports multiple row and column lines.5A key can be placed at each intersection of a unique row and a unique column.6The keypad controller can sense a key-press and key-release and report the7event using a interrupt to the cpu.8 9This binding is based on the matrix-keymap binding with the following10changes:11 12 * keypad,num-rows and keypad,num-columns are required.13 14Required SoC Specific Properties:15- compatible: should be one of the following16 - "ti,twl4030-keypad": For controllers compatible with twl4030 keypad17 controller.18- interrupt: should be one of the following19 - <1>: For controllers compatible with twl4030 keypad controller.20 21Example:22 twl_keypad: keypad {23 compatible = "ti,twl4030-keypad";24 interrupts = <1>;25 keypad,num-rows = <8>;26 keypad,num-columns = <8>;27 };28