Documentation/devicetree/bindings/display/ht16k33.txt

   1 Holtek ht16k33 RAM mapping 16*8 LED controller driver with keyscan
   2 -------------------------------------------------------------------------------
   3
   4 Required properties:
   5 - compatible:           "holtek,ht16k33"
   6 - reg:                  I2C slave address of the chip.
   7 - interrupts:           Interrupt specification for the key pressed interrupt.
   8 - refresh-rate-hz:      Display update interval in HZ.
   9 - debounce-delay-ms:    Debouncing interval time in milliseconds.
  10 - linux,keymap:         The keymap for keys as described in the binding
  11                         document (devicetree/bindings/input/matrix-keymap.txt).
  12
  13 Optional properties:
  14 - linux,no-autorepeat:  Disable keyrepeat.
  15 - default-brightness-level: Initial brightness level [0-15] (default: 15).
  16
  17 Example:
  18
  19 &i2c1 {
  20         ht16k33: ht16k33@70 {
  21                 compatible = "holtek,ht16k33";
  22                 reg = <0x70>;
  23                 refresh-rate-hz = <20>;
  24                 debounce-delay-ms = <50>;
  25                 interrupt-parent = <&gpio4>;
  26                 interrupts = <5 (IRQ_TYPE_LEVEL_HIGH | IRQ_TYPE_EDGE_RISING)>;
  27                 linux,keymap = <
  28                         MATRIX_KEY(2, 0, KEY_F6)
  29                         MATRIX_KEY(3, 0, KEY_F8)
  30                         MATRIX_KEY(4, 0, KEY_F10)
  31                         MATRIX_KEY(5, 0, KEY_F4)
  32                         MATRIX_KEY(6, 0, KEY_F2)
  33                         MATRIX_KEY(2, 1, KEY_F5)
  34                         MATRIX_KEY(3, 1, KEY_F7)
  35                         MATRIX_KEY(4, 1, KEY_F9)
  36                         MATRIX_KEY(5, 1, KEY_F3)
  37                         MATRIX_KEY(6, 1, KEY_F1)
  38                 >;
  39         };
  40 };