Hi Fengping, On Wed, Jan 08, 2020 at 02:29:22PM +0800, fengping yu wrote: > From: "fengping.yu" <fengping.yu@xxxxxxxxxxxx> > > Add mtk keypad device tree documentation. > > Change-Id: I415b76ee980784992763c768829b2dda76699dea > Signed-off-by: fengping.yu <fengping.yu@xxxxxxxxxxxx> > --- > .../devicetree/bindings/input/mtk-kpd.txt | 45 +++++++++++++++++++ > 1 file changed, 45 insertions(+) > create mode 100644 Documentation/devicetree/bindings/input/mtk-kpd.txt > > diff --git a/Documentation/devicetree/bindings/input/mtk-kpd.txt b/Documentation/devicetree/bindings/input/mtk-kpd.txt > new file mode 100644 > index 000000000000..2af81e696159 > --- /dev/null > +++ b/Documentation/devicetree/bindings/input/mtk-kpd.txt > @@ -0,0 +1,45 @@ > +* Mediatek's Keypad Controller device tree binding > + > +Mediatek's Keypad controller is used to interface a SoC with a matrix-type > +keypad device. The keypad controller supports multiple row and column lines. > +A key can be placed at each intersection of a unique row and a unique column. > +The keypad controller can sense a key-press and key-release and report the > +event using a interrupt to the cpu. > + > +Required properties: > +- compatible should contain: > + * "mediatek,mt6779-keypad" for MT6779 keypad > + * "mediatek,kp" for common keypad > + > +- reg: The base address of the Keypad register bank. > + > +- interrupts: A single interrupt specifier. > + > +- mediatek,key-debounce-ms: Debounce interval in milliseconds, maximum value > + is 256ms > + > +- mediatek,hw-map-num: Number of entries of keycode in mediatek,hw-init-map > + > +- mediatek,hw-init-map: An array of packed 1-cell entries containing the > + equivalent of hw-map-num linux key-code. Each cell is Linux keymap of > + corresponding row/col, arrange like this: > + > + row0col0, row0col1, row0col2,...row0col8, > + row1col0, row1col1, row1col2,...row1col8, > + ... > + row7col0, row7col1, row7col2,...row7col8. Please use standard "linux,keymap" property as defined in Documentation/devicetree/bindings/input/matrix-keymap.txt. You can use API from drivers/input/matrix-keymap.c to handle the property. Thanks. -- Dmitry
