On Tue, Dec 08, 2020 at 11:54:45PM +0800, cy_huang wrote: > From: ChiYuan Huang <cy_huang@xxxxxxxxxxx> > > Adds DT binding document for Richtek RT4831 DSV regulator. > > Signed-off-by: ChiYuan Huang <cy_huang@xxxxxxxxxxx> > --- > since v3 > - Add dual license tag in regulator binding document. > - Left regulator dt-binding example only. > --- > .../regulator/richtek,rt4831-regulator.yaml | 57 ++++++++++++++++++++++ > 1 file changed, 57 insertions(+) > create mode 100644 Documentation/devicetree/bindings/regulator/richtek,rt4831-regulator.yaml > > diff --git a/Documentation/devicetree/bindings/regulator/richtek,rt4831-regulator.yaml b/Documentation/devicetree/bindings/regulator/richtek,rt4831-regulator.yaml > new file mode 100644 > index 00000000..c6741f2 > --- /dev/null > +++ b/Documentation/devicetree/bindings/regulator/richtek,rt4831-regulator.yaml > @@ -0,0 +1,57 @@ > +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) > +%YAML 1.2 > +--- > +$id: http://devicetree.org/schemas/regulator/richtek,rt4831-regulator.yaml# > +$schema: http://devicetree.org/meta-schemas/core.yaml# > + > +title: Richtek RT4831 Display Bias Voltage Regulator > + > +maintainers: > + - ChiYuan Huang <cy_huang@xxxxxxxxxxx> > + > +description: | > + RT4831 is a multifunctional device that can provide power to the LCD display > + and LCD backlight. > + > + For Display Bias Voltage DSVP and DSVN, the output range is about 4V to 6.5V. > + It is sufficient to meet the current LCD power requirement. > + > + DSVLCM is a boost regulator in IC internal as DSVP and DSVN input power. > + Its voltage should be configured above 0.15V to 0.2V gap larger than the > + voltage needed for DSVP and DSVN. Too much voltage gap could improve the > + voltage drop from the heavy loading scenario. But it also make the power > + efficiency worse. It's a trade-off. > + > + Datasheet is available at > + https://www.richtek.com/assets/product_file/RT4831A/DS4831A-05.pdf > + > +patternProperties: > + "^DSV(LCM|P|N)$": > + type: object > + $ref: regulator.yaml# > + description: > + Properties for single Display Bias Voltage regulator. Just put this into the MFD schema directly if you don't have any custom properties to add. > + > +additionalProperties: false > + > +examples: > + - | > + regulators { > + DSVLCM { > + regulator-min-microvolt = <4000000>; > + regulator-max-microvolt = <7150000>; > + regulator-allow-bypass; > + }; > + DSVP { > + regulator-name = "rt4831-dsvp"; > + regulator-min-microvolt = <4000000>; > + regulator-max-microvolt = <6500000>; > + regulator-boot-on; > + }; > + DSVN { > + regulator-name = "rt4831-dsvn"; > + regulator-min-microvolt = <4000000>; > + regulator-max-microvolt = <6500000>; > + regulator-boot-on; > + }; > + }; > -- > 2.7.4 >
