1 * ST Keyscan controller Device Tree bindings
2
3 The ST keyscan controller Device Tree binding is based on the
4 matrix-keymap.
5
6 Required 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 document
20 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 keypad
25 controller.
26
27 Optional property:
28 - st,debounce_us: Debouncing interval time in microseconds
29
30 Example:
31
32 keyscan: 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 };
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