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. > + }; > -- > 2.7.4 >
