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 - interrupt-parent:     A phandle pointing to the interrupt controller
   8                         serving the interrupt for this chip.
   9 - interrupts:           Interrupt specification for the key pressed interrupt.
  10 - refresh-rate-hz:      Display update interval in HZ.
  11 - debounce-delay-ms:    Debouncing interval time in milliseconds.
  12 - linux,keymap:         The keymap for keys as described in the binding
  13                         document (devicetree/bindings/input/matrix-keymap.txt).
  14
  15 Optional properties:
  16 - linux,no-autorepeat:  Disable keyrepeat.
  17 - default-brightness-level: Initial brightness level [0-15] (default: 15).
  18
  19 Example:
  20
  21 &i2c1 {
  22         ht16k33: ht16k33@70 {
  23                 compatible = "holtek,ht16k33";
  24                 reg = <0x70>;
  25                 refresh-rate-hz = <20>;
  26                 debounce-delay-ms = <50>;
  27                 interrupt-parent = <&gpio4>;
  28                 interrupts = <5 (IRQ_TYPE_LEVEL_HIGH | IRQ_TYPE_EDGE_RISING)>;
  29                 linux,keymap = <
  30                         MATRIX_KEY(2, 0, KEY_F6)
  31                         MATRIX_KEY(3, 0, KEY_F8)
  32                         MATRIX_KEY(4, 0, KEY_F10)
  33                         MATRIX_KEY(5, 0, KEY_F4)
  34                         MATRIX_KEY(6, 0, KEY_F2)
  35                         MATRIX_KEY(2, 1, KEY_F5)
  36                         MATRIX_KEY(3, 1, KEY_F7)
  37                         MATRIX_KEY(4, 1, KEY_F9)
  38                         MATRIX_KEY(5, 1, KEY_F3)
  39                         MATRIX_KEY(6, 1, KEY_F1)
  40                 >;
  41         };
  42 };