On Tue, Dec 08, 2020 at 11:54:44PM +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> > --- > since v3 > - Move inlcude/dt-bindings/leds/rt4831-backlight.h from patch 0004 to here. > - Add dual license tag in header and backlight binding document. > - Left backlight dt-binding example only. > --- > .../leds/backlight/richtek,rt4831-backlight.yaml | 76 ++++++++++++++++++++++ > include/dt-bindings/leds/rt4831-backlight.h | 23 +++++++ > 2 files changed, 99 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..f24c8d1 > --- /dev/null > +++ b/Documentation/devicetree/bindings/leds/backlight/richtek,rt4831-backlight.yaml > @@ -0,0 +1,76 @@ > +# 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@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 We have common schema for these. You need to reference that and drop 'description' and the type ref. > + > + 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> > + 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>; > + }; > 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@xxxxxxxxxxx> > + */ > + > +#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 >
