Rob Herring <robh@xxxxxxxxxx> 於 2020年12月8日 週二 上午12:42寫道： > > On Fri, Dec 04, 2020 at 12:06:33AM +0800, cy_huang wrote: > > From: ChiYuan Huang <cy_huang@xxxxxxxxxxx> > > > > Adds DT binding document for Richtek RT4831 backlight. > > > > Signed-off-by: ChiYuan Huang <cy_huang@xxxxxxxxxxx> > > --- > > .../leds/backlight/richtek,rt4831-backlight.yaml | 86 ++++++++++++++++++++++ > > 1 file changed, 86 insertions(+) > > create mode 100644 Documentation/devicetree/bindings/leds/backlight/richtek,rt4831-backlight.yaml > > > > diff --git a/Documentation/devicetree/bindings/leds/backlight/richtek,rt4831-backlight.yaml b/Documentation/devicetree/bindings/leds/backlight/richtek,rt4831-backlight.yaml > > new file mode 100644 > > index 00000000..df1439a > > --- /dev/null > > +++ b/Documentation/devicetree/bindings/leds/backlight/richtek,rt4831-backlight.yaml > > @@ -0,0 +1,86 @@ > > +# SPDX-License-Identifier: GPL-2.0 > > +%YAML 1.2 > > +--- > > +$id: http://devicetree.org/schemas/leds/backlight/richtek,rt4831-backlight.yaml# > > +$schema: http://devicetree.org/meta-schemas/core.yaml# > > + > > +title: Richtek RT4831 Backlight > > + > > +maintainers: > > + - ChiYuan Huang <cy_huang@xxxxxxxxxxx> > > + > > +description: | > > + RT4831 is a mutifunctional device that can provide power to the LCD display > > + and LCD backlight. > > + > > + For the LCD backlight, it can provide four channel WLED driving capability. > > + Each channel driving current is up to 30mA > > + > > + Datasheet is available at > > + https://www.richtek.com/assets/product_file/RT4831A/DS4831A-05.pdf > > + > > +properties: > > + compatible: > > + const: richtek,rt4831-backlight > > + > > + default-brightness: > > + description: | > > + The default brightness that applied to the system on start-up. > > + $ref: /schemas/types.yaml#/definitions/uint32 > > + minimum: 0 > > + maximum: 2048 > > + > > + max-brightness: > > + description: | > > + The max brightness for the H/W limit > > + $ref: /schemas/types.yaml#/definitions/uint32 > > + minimum: 0 > > + maximum: 2048 > > + > > + richtek,pwm-enable: > > + description: | > > + Specify the backlight dimming following by PWM duty or by SW control. > > + type: boolean > > + > > + richtek,bled-ovp-sel: > > + description: | > > + Backlight OVP level selection, currently support 17V/21V/25V/29V. > > + $ref: /schemas/types.yaml#/definitions/uint8 > > + default: 1 > > + minimum: 0 > > + maximum: 3 > > + > > + richtek,channel-use: > > + description: | > > + Backlight LED channel to be used. > > + BIT 0/1/2/3 is used to indicate led channel 1/2/3/4 enable or disable. > > + $ref: /schemas/types.yaml#/definitions/uint8 > > + minimum: 1 > > + maximum: 15 > > + > > +required: > > + - compatible > > + - richtek,channel-use > > + > > +additionalProperties: false > > + > > +examples: > > + - | > > + #include <dt-bindings/leds/rt4831-backlight.h> > > + i2c { > > + #address-cells = <1>; > > + #size-cells = <0>; > > + > > + rt4831@11 { > > + compatible = "richtek,rt4831"; > > + reg = <0x11>; > > + > > + backlight { > > + compatible = "richtek,rt4831-backlight"; > > + default-brightness = <1024>; > > + max-brightness = <2048>; > > + richtek,bled-ovp-sel = /bits/ 8 <RT4831_BLOVPLVL_21V>; > > + richtek,channel-use = /bits/ 8 <RT4831_BLED_ALLCHEN>; > > + }; > > + }; > > Just do 1 complete example in the mfd binding. > Ack. > > + }; > > -- > > 2.7.4 > >
