Documentation/devicetree/bindings/input/st-keyscan.txt

   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         };