diff options
| author |   Robin van der Gracht <robin@protonic.nl> | 2016-11-07 10:56:35 +0100 |
|---|---|---|
| committer |   Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2016-11-10 16:53:19 +0100 |
| commit | 8992da44c6805d53b920fe538992eae4afd6f22e (patch) | |
| tree | 47f607d1a9f5694690e63e4847df5bd4ea632851 /Documentation/devicetree/bindings/display/ht16k33.txt | |
| parent | mei: send OS type to the FW (diff) | |
| download | linux-dev-8992da44c6805d53b920fe538992eae4afd6f22e.tar.xz linux-dev-8992da44c6805d53b920fe538992eae4afd6f22e.zip | |
auxdisplay: ht16k33: Driver for LED controller
Added a driver for the Holtek HT16K33 LED controller with keyscan.
Signed-off-by: Robin van der Gracht <robin@protonic.nl>
CC: Miguel Ojeda Sandonis <miguel.ojeda.sandonis@gmail.com>
Acked-by: Rob Herring <robh@kernel.org>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'Documentation/devicetree/bindings/display/ht16k33.txt')
| -rw-r--r-- | Documentation/devicetree/bindings/display/ht16k33.txt | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/display/ht16k33.txt b/Documentation/devicetree/bindings/display/ht16k33.txt new file mode 100644 index 000000000000..8e5b30b87754 --- /dev/null +++ b/Documentation/devicetree/bindings/display/ht16k33.txt @@ -0,0 +1,42 @@ +Holtek ht16k33 RAM mapping 16*8 LED controller driver with keyscan +------------------------------------------------------------------------------- + +Required properties: +- compatible: "holtek,ht16k33" +- reg: I2C slave address of the chip. +- interrupt-parent: A phandle pointing to the interrupt controller + serving the interrupt for this chip. +- interrupts: Interrupt specification for the key pressed interrupt. +- refresh-rate-hz: Display update interval in HZ. +- debounce-delay-ms: Debouncing interval time in milliseconds. +- linux,keymap: The keymap for keys as described in the binding + document (devicetree/bindings/input/matrix-keymap.txt). + +Optional properties: +- linux,no-autorepeat: Disable keyrepeat. +- default-brightness-level: Initial brightness level [0-15] (default: 15). + +Example: + +&i2c1 { + ht16k33: ht16k33@70 { + compatible = "holtek,ht16k33"; + reg = <0x70>; + refresh-rate-hz = <20>; + debounce-delay-ms = <50>; + interrupt-parent = <&gpio4>; + interrupts = <5 (IRQ_TYPE_LEVEL_HIGH | IRQ_TYPE_EDGE_RISING)>; + linux,keymap = < + MATRIX_KEY(2, 0, KEY_F6) + MATRIX_KEY(3, 0, KEY_F8) + MATRIX_KEY(4, 0, KEY_F10) + MATRIX_KEY(5, 0, KEY_F4) + MATRIX_KEY(6, 0, KEY_F2) + MATRIX_KEY(2, 1, KEY_F5) + MATRIX_KEY(3, 1, KEY_F7) + MATRIX_KEY(4, 1, KEY_F9) + MATRIX_KEY(5, 1, KEY_F3) + MATRIX_KEY(6, 1, KEY_F1) + >; + }; +}; |