From: ChiYuan Huang <cy_huang@xxxxxxxxxxx> Add mt6370 backlight binding documentation. Signed-off-by: ChiYuan Huang <cy_huang@xxxxxxxxxxx> --- .../backlight/mediatek,mt6370-backlight.yaml | 107 ++++++++++++++++++ 1 file changed, 107 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 000000000000..25a05e607e83 --- /dev/null +++ b/Documentation/devicetree/bindings/leds/backlight/mediatek,mt6370-backlight.yaml @@ -0,0 +1,107 @@ +# 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-bit: + $ref: /schemas/types.yaml#/definitions/uint8 + enum: [0, 1, 2, 3] + description: | + The selection of the upper and lower bounds threshold of backlight + PWM resolution. If we choose selection 3 (6 bits), the variation of PWM + resolution needs over than 64 steps (2^6). + value mapping: + - 0: 1 + - 1: 2 + - 2: 4 + - 3: 6 + + mediatek,bled-ovp-shutdown: + description: | + Enable the backlight shutdown when OVP level triggered + type: boolean + + mediatek,bled-ovp-microvolt: + enum: [0, 1, 2, 3] + description: | + Backlight OVP level selection. + value mapping: + - 0: 17000000 + - 1: 21000000 + - 2: 25000000 + - 3: 29000000 + + mediatek,bled-ocp-shutdown: + description: | + Enable the backlight shutdown when OCP level triggerred. + type: boolean + + mediatek,bled-ocp-microamp: + enum: [0, 1, 2, 3] + description: | + Backlight OC level selection. + value mapping: + - 0: 900000 + - 1: 1200000 + - 2: 1500000 + - 3: 1800000 + + 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 -- 2.25.1
