[PATCH 13/14] dt-bindings: backlight: Add Mediatek MT6370 backlight binding documentation
From: ChiaEn Wu <hidden>
Date: 2022-05-31 12:08:13
Also in:
linux-arm-kernel, linux-fbdev, linux-iio, linux-leds, linux-mediatek, linux-pm, linux-usb, lkml
Subsystem:
led subsystem, open firmware and flattened device tree bindings, the rest · Maintainers:
Lee Jones, Pavel Machek, Rob Herring, Krzysztof Kozlowski, Conor Dooley, Linus Torvalds
From: ChiYuan Huang <redacted> Add mt6370 backlight binding documentation. Signed-off-by: ChiYuan Huang <redacted> --- .../backlight/mediatek,mt6370-backlight.yaml | 110 ++++++++++++++++++ 1 file changed, 110 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..81d72ed44be4
--- /dev/null
+++ b/Documentation/devicetree/bindings/leds/backlight/mediatek,mt6370-backlight.yaml@@ -0,0 +1,110 @@ +# 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@richtek.com> + +description: | + MT6370 is a highly-integrated smart power management IC, which includes a + single cell Li-Ion/Li-Polymer switching battery charger, a USB Type-C & + Power Delivery (PD) controller, dual flash LED current sources, a RGB LED + driver, a backlight WLED driver, a display bias driver and a general LDO for + portable devices. + + For the LCD backlight, it can provide 4 channel WLED driving capability. + Each channel driving current is up to 30mA + +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-sel: + $ref: /schemas/types.yaml#/definitions/uint8 + enum: [0, 1, 2, 3] + description: | + Backlight PWM hysteresis input level selection. + value mapping: + - 0: 1bit + - 1: 2bit + - 2: 4bit + - 3: 6bit + + mediatek,bled-ovp-shutdown: + description: | + Enable the backlight shutdown when OVP level triggered + type: boolean + + mediatek,bled-ovp-level-sel: + $ref: /schemas/types.yaml#/definitions/uint8 + enum: [0, 1, 2, 3] + description: | + Backlight OVP level selection. + value mapping: + - 0: 17V + - 1: 21V + - 2: 25V + - 3: 29V + + mediatek,bled-ocp-shutdown: + description: | + Enable the backlight shutdown when OCP level triggerred. + type: boolean + + mediatek,bled-ocp-level-sel: + $ref: /schemas/types.yaml#/definitions/uint8 + enum: [0, 1, 2, 3] + description: | + Backlight OC level selection. + value mapping: + - 0: 900mA + - 1: 1200mA + - 2: 1500mA + - 3: 1800mA + + 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
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2.25.1