* ST Keyscan controller Device Tree bindings
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The ST keyscan controller Device Tree binding is based on the
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matrix-keymap.
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Required properties:
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- compatible: "st,sti-keyscan"
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- reg: Register base address and size of st-keyscan controller.
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- interrupts: Interrupt number for the st-keyscan controller.
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- clocks: Must contain one entry, for the module clock.
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See ../clocks/clock-bindings.txt for details.
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- pinctrl: Should specify pin control groups used for this controller.
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See ../pinctrl/pinctrl-bindings.txt for details.
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- linux,keymap: The keymap for keys as described in the binding document
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devicetree/bindings/input/matrix-keymap.txt.
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- keypad,num-rows: Number of row lines connected to the keypad controller.
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- keypad,num-columns: Number of column lines connected to the keypad
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controller.
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Optional property:
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- st,debounce_us: Debouncing interval time in microseconds
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Example:
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keyscan: keyscan@fe4b0000 {
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compatible = "st,sti-keyscan";
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reg = <0xfe4b0000 0x2000>;
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interrupts = <GIC_SPI 212 IRQ_TYPE_NONE>;
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clocks = <&CLK_SYSIN>;
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pinctrl-names = "default";
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pinctrl-0 = <&pinctrl_keyscan>;
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keypad,num-rows = <4>;
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keypad,num-columns = <4>;
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st,debounce_us = <5000>;
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linux,keymap = < MATRIX_KEY(0x00, 0x00, KEY_F13)
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MATRIX_KEY(0x00, 0x01, KEY_F9)
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MATRIX_KEY(0x00, 0x02, KEY_F5)
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MATRIX_KEY(0x00, 0x03, KEY_F1)
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MATRIX_KEY(0x01, 0x00, KEY_F14)
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MATRIX_KEY(0x01, 0x01, KEY_F10)
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MATRIX_KEY(0x01, 0x02, KEY_F6)
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MATRIX_KEY(0x01, 0x03, KEY_F2)
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MATRIX_KEY(0x02, 0x00, KEY_F15)
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MATRIX_KEY(0x02, 0x01, KEY_F11)
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MATRIX_KEY(0x02, 0x02, KEY_F7)
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MATRIX_KEY(0x02, 0x03, KEY_F3)
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MATRIX_KEY(0x03, 0x00, KEY_F16)
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MATRIX_KEY(0x03, 0x01, KEY_F12)
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MATRIX_KEY(0x03, 0x02, KEY_F8)
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MATRIX_KEY(0x03, 0x03, KEY_F4) >;
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};
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