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Message-ID: <CADiBU3_S918K3CcjLvmtZxQBzA0a-nCKM41LeqU==RvOuvhSJA@mail.gmail.com>
Date: Tue, 8 Dec 2020 22:56:29 +0800
From: ChiYuan Huang <u0084500@...il.com>
To: Rob Herring <robh@...nel.org>
Cc: Lee Jones <lee.jones@...aro.org>, cy_huang <cy_huang@...htek.com>,
lkml <linux-kernel@...r.kernel.org>,
"open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS"
<devicetree@...r.kernel.org>
Subject: Re: [PATCH v2 4/4] mfd: rt4831: Adds DT binding document for Richtek
RT4831 MFD core
Rob Herring <robh@...nel.org> 於 2020年12月8日 週二 上午12:41寫道：
>
> On Fri, Dec 04, 2020 at 12:06:35AM +0800, cy_huang wrote:
> > From: ChiYuan Huang <cy_huang@...htek.com>
> >
> > Adds DT binding document for Richtek RT4831 MFD core.
> >
> > This patch depends on
> >
> > "backlight: rt4831: Adds DT binding document for Richtek RT4831 backlight".
> > "regulator: rt4831: Adds DT binding document for Richtek RT4831 DSV regulator".
>
> You generally don't need to state dependencies on other patches in the
> series. You need to state dependencies that are either pending in a
> maintainers tree or patches not yet applied. IOW, anything not in Linus'
> tree. And that information goes below the '---'.
Ok, I'll add the depend on tag below ---
>
> >
> > Signed-off-by: ChiYuan Huang <cy_huang@...htek.com>
> > ---
> > Changes since v2
> > - Add "patch depends on" in commit description.
> > - Adds regulator-allow-bypass flag in DSVLCM.
> > ---
> > .../devicetree/bindings/mfd/richtek,rt4831.yaml | 90 ++++++++++++++++++++++
> > include/dt-bindings/leds/rt4831-backlight.h | 23 ++++++
>
> This goes in the backlight binding patch.
>
> > 2 files changed, 113 insertions(+)
> > create mode 100644 Documentation/devicetree/bindings/mfd/richtek,rt4831.yaml
> > create mode 100644 include/dt-bindings/leds/rt4831-backlight.h
> >
> > diff --git a/Documentation/devicetree/bindings/mfd/richtek,rt4831.yaml b/Documentation/devicetree/bindings/mfd/richtek,rt4831.yaml
> > new file mode 100644
> > index 00000000..c6ca953
> > --- /dev/null
> > +++ b/Documentation/devicetree/bindings/mfd/richtek,rt4831.yaml
> > @@ -0,0 +1,90 @@
> > +# SPDX-License-Identifier: GPL-2.0
>
> For new bindings:
>
> (GPL-2.0-only OR BSD-2-Clause)
>
Ack, change three binding files for dual license.
> > +%YAML 1.2
> > +---
> > +$id: http://devicetree.org/schemas/mfd/richtek,rt4831.yaml#
> > +$schema: http://devicetree.org/meta-schemas/core.yaml#
> > +
> > +title: Richtek RT4831 DSV and Backlight Integrated IC
> > +
> > +maintainers:
> > + - ChiYuan Huang <cy_huang@...htek.com>
> > +
> > +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's sufficient to meet the current LCD power requirement.
> > +
> > + 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
> > +
> > + reg:
> > + description: I2C device address.
> > + maxItems: 1
> > +
> > + enable-gpios:
> > + description: |
> > + GPIO to enable/disable the chip. It is optional.
> > + Some usage directly tied this pin to follow VIO 1.8V power on sequence.
> > + maxItems: 1
> > +
> > + regulators:
> > + $ref: ../regulator/richtek,rt4831-regulator.yaml
> > +
> > + backlight:
> > + $ref: ../leds/backlight/richtek,rt4831-backlight.yaml
> > +
> > +required:
> > + - compatible
> > + - reg
> > +
> > +additionalProperties: false
> > +
> > +examples:
> > + - |
> > + #include <dt-bindings/leds/rt4831-backlight.h>
> > + i2c {
> > + #address-cells = <1>;
> > + #size-cells = <0>;
> > +
> > + rt4831@11 {
> > + compatible = "richtek,rt4831";
> > + reg = <0x11>;
> > +
> > + 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;
> > + };
> > + };
> > +
> > + 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..7084906
> > --- /dev/null
> > +++ b/include/dt-bindings/leds/rt4831-backlight.h
> > @@ -0,0 +1,23 @@
> > +/*
> > + * This header provides constants for rt4831 backlight bindings.
> > + *
> > + * This file is licensed under the terms of the GNU General Public
> > + * License version 2. This program is licensed "as is" without any
> > + * warranty of any kind, whether express or implied.
>
> Use SPDX tag. Also, probably should be dual licensed too if you want to
> use your DTs with non-GPL OS.
>
Ack.
> > + */
> > +
> > +#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
> >
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