> On Sat, Dec 12, 2020 at 12:33:43AM +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 v3 mfd > > binding patch 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 > > +--- > > +$id: http://devicetree.org/schemas/leds/backlight/richtek,rt4831-b > > acklight.yaml# > > +$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.p > > df > > + > > +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 > > + > > + 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>; > This is in the MFD schema already, so drop the example. > Will ack in next series patch. > > > > + }; > > 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_17V0 > > +#define RT4831_BLOVPLVL_21V1 > > +#define RT4831_BLOVPLVL_25V2 > > +#define RT4831_BLOVPLVL_29V3 > > + > > +#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 */ ************* Email Confidentiality Notice ******************** The information contained in this e-mail message (including any attachments) may be confidential, proprietary, privileged, or otherwise exempt from disclosure under applicable laws. It is intended to be conveyed only to the designated recipient(s). Any use, dissemination, distribution, printing, retaining or copying of this e-mail (including its attachments) by unintended recipient(s) is strictly prohibited and may be unlawful. If you are not an intended recipient of this e-mail, or believe that you have received this e-mail in error, please notify the sender immediately (by replying to this e-mail), delete any and all copies of this e-mail (including any attachments) from your system, and do not disclose the content of this e-mail to any other person. Thank you!
