On Mon, Apr 26, 2021 at 03:18:09PM +0800, cy_huang wrote:
From: ChiYuan Huang cy_huang@richtek.com
Adds DT binding document for Richtek RT4831 backlight.
Signed-off-by: ChiYuan Huang cy_huang@richtek.com Reviewed-by: Daniel Thompson daniel.thompson@linaro.org
Resend this v6 patch series to loop devicetree reviewers.
For next, need to add the below line Reviewed-by: Daniel Thompson daniel.thompson@linaro.org
.../leds/backlight/richtek,rt4831-backlight.yaml | 65 ++++++++++++++++++++++ include/dt-bindings/leds/rt4831-backlight.h | 23 ++++++++ 2 files changed, 88 insertions(+) create mode 100644 Documentation/devicetree/bindings/leds/backlight/richtek,rt4831-backlight.yaml create mode 100644 include/dt-bindings/leds/rt4831-backlight.h
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..4da6a66 --- /dev/null +++ b/Documentation/devicetree/bindings/leds/backlight/richtek,rt4831-backlight.yaml @@ -0,0 +1,65 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%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@richtek.com
+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
Need to reference common backlight schema:
allOf: - $ref: common.yaml#
+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
Drop description and $ref. Covered in common.yaml.
- minimum: 0
- maximum: 2048
- max-brightness:
- description: |
The max brightness for the H/W limit- $ref: /schemas/types.yaml#/definitions/uint32
And here.
- 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 diff --git a/include/dt-bindings/leds/rt4831-backlight.h b/include/dt-bindings/leds/rt4831-backlight.h new file mode 100644 index 00000000..125c635 --- /dev/null +++ b/include/dt-bindings/leds/rt4831-backlight.h @@ -0,0 +1,23 @@ +/* SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) */ +/*
- This header provides constants for rt4831 backlight bindings.
- Copyright (C) 2020, Richtek Technology Corp.
- Author: ChiYuan Huang cy_huang@richtek.com
- */
+#ifndef _DT_BINDINGS_RT4831_BACKLIGHT_H +#define _DT_BINDINGS_RT4831_BACKLIGHT_H
+#define RT4831_BLOVPLVL_17V 0 +#define RT4831_BLOVPLVL_21V 1 +#define RT4831_BLOVPLVL_25V 2 +#define RT4831_BLOVPLVL_29V 3
+#define RT4831_BLED_CH1EN (1 << 0) +#define RT4831_BLED_CH2EN (1 << 1) +#define RT4831_BLED_CH3EN (1 << 2) +#define RT4831_BLED_CH4EN (1 << 3) +#define RT4831_BLED_ALLCHEN ((1 << 4) - 1)
+#endif /* _DT_BINDINGS_RT4831_BACKLIGHT_H */
2.7.4