On Tue, Feb 09, 2016 at 12:31:08PM +0100, Robin van der Gracht wrote:
> This is a driver for the Holtek HT16K33 LED controller with keyscan.
>
> Signed-off-by: Robin van der Gracht <robin@xxxxxxxxxxx>
> ---
> Changes in v2:
> - Fixed build error reported by kbuild test robot by including mm.h
>
> .../devicetree/bindings/display/ht16k33.txt | 42 ++
> drivers/auxdisplay/Kconfig | 9 +
> drivers/auxdisplay/Makefile | 1 +
> drivers/auxdisplay/ht16k33.c | 573 +++++++++++++++++++++
> 4 files changed, 625 insertions(+)
> create mode 100644 Documentation/devicetree/bindings/display/ht16k33.txt
> create mode 100644 drivers/auxdisplay/ht16k33.c
>
> diff --git a/Documentation/devicetree/bindings/display/ht16k33.txt b/Documentation/devicetree/bindings/display/ht16k33.txt
> new file mode 100644
> index 0000000..45fbabb
> --- /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: "ht,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: Display update interval in HZ.
Add units: "-hz"
> +- debounce-delay-ms: Debouncing interval time in microseconds.
> +- linux,keymap: The keymap for keys as described in the binding
> + document (devicetree/bindings/input/matrix-keymap.txt).
The alignment of the descriptions here seem to be random. Please line
them up.
> +
> +Optional properties:
> +- linux,no-autorepeat: Disable keyrepeat.
> +- default-brightness: Initial brightness setting [0-15] (15 if not set).
default-brightness-level seem a bit more common.
> +
> +Example:
> +
> +&i2c1 {
> + ht16k33: ht16k33@70 {
> + compatible = "ht,ht16k33";
> + reg = <0x70>;
> + refresh-rate = <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_F0)
> + 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)
> + >;
> + };
> +};
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