On Thu, Jun 23, 2022 at 07:56:22PM +0800, ChiaEn Wu wrote: > From: ChiYuan Huang <cy_huang@xxxxxxxxxxx> > > Add mt6370 backlight binding documentation. > > Signed-off-by: ChiYuan Huang <cy_huang@xxxxxxxxxxx> > --- > > v3 > - Rename "mediatek,bled-pwm-hys-input-threshold-steps" to > "mediatek,bled-pwm-hys-input-th-steps" > - Refine "bled-pwm-hys-input-th-steps", "bled-ovp-microvolt", > "bled-ocp-microamp" enum values > --- > .../leds/backlight/mediatek,mt6370-backlight.yaml | 92 ++++++++++++++++++++++ > 1 file changed, 92 insertions(+) > create mode 100644 Documentation/devicetree/bindings/leds/backlight/mediatek,mt6370-backlight.yaml > > diff --git a/Documentation/devicetree/bindings/leds/backlight/mediatek,mt6370-backlight.yaml b/Documentation/devicetree/bindings/leds/backlight/mediatek,mt6370-backlight.yaml > new file mode 100644 > index 0000000..26563ae > --- /dev/null > +++ b/Documentation/devicetree/bindings/leds/backlight/mediatek,mt6370-backlight.yaml > @@ -0,0 +1,92 @@ > +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) > +%YAML 1.2 > +--- > +$id: http://devicetree.org/schemas/leds/backlight/mediatek,mt6370-backlight.yaml# > +$schema: http://devicetree.org/meta-schemas/core.yaml# > + > +title: Mediatek MT6370 Backlight > + > +maintainers: > + - ChiaEn Wu <chiaen_wu@xxxxxxxxxxx> > + > +description: | > + This module is part of the MT6370 MFD device. > + The MT6370 Backlight WLED driver supports up to a 29V output voltage for > + 4 channels of 8 series WLEDs. Each channel supports up to 30mA of current > + capability with 2048 current steps (11 bits) in exponential or linear > + mapping curves. > + > +allOf: > + - $ref: common.yaml# > + > +properties: > + compatible: > + const: mediatek,mt6370-backlight > + > + default-brightness: > + minimum: 0 > + maximum: 2048 > + > + max-brightness: > + minimum: 0 > + maximum: 2048 > + > + enable-gpios: > + description: External backlight 'enable' pin > + maxItems: 1 > + > + mediatek,bled-pwm-enable: > + description: | > + Enable external PWM input for backlight dimming > + type: boolean > + > + mediatek,bled-pwm-hys-enable: > + description: | > + Enable the backlight input-hysteresis for PWM mode > + type: boolean > + > + mediatek,bled-pwm-hys-input-th-steps: > + $ref: /schemas/types.yaml#/definitions/uint8 > + enum: [1, 4, 16, 64] > + description: | > + The selection of the upper and lower bounds threshold of backlight > + PWM resolution. If we choose selection 64, the variation of PWM > + resolution needs over than 64 steps. more than? Thanks, Joe > + > + mediatek,bled-ovp-shutdown: > + description: | > + Enable the backlight shutdown when OVP level triggered > + type: boolean > + > + mediatek,bled-ovp-microvolt: > + enum: [17000000, 21000000, 25000000, 29000000] > + description: | > + Backlight OVP level selection. > + > + mediatek,bled-ocp-shutdown: > + description: | > + Enable the backlight shutdown when OCP level triggerred. > + type: boolean > + > + mediatek,bled-ocp-microamp: > + enum: [900000, 1200000, 1500000, 1800000] > + description: | > + Backlight OC level selection. > + > + mediatek,bled-channel-use: > + $ref: /schemas/types.yaml#/definitions/uint8 > + description: | > + Backlight LED channel to be used. > + Each bit mapping to: > + - 0: CH4 > + - 1: CH3 > + - 2: CH2 > + - 3: CH1 > + minimum: 1 > + maximum: 15 > + > +required: > + - compatible > + - mediatek,bled-channel-use > + > +additionalProperties: false > -- > 2.7.4 >
