linux-kernel - Re: [PATCH v1 2/2] mfd: rt4505: Adds DT binding document for Richtek RT4831 MFD core

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Date:   Mon, 2 Nov 2020 13:53:18 +0800
From:   ChiYuan Huang <u0084500@...il.com>
To:     Lee Jones <lee.jones@...aro.org>, robh+dt@...nel.org
Cc:     cy_huang <cy_huang@...htek.com>,
        lkml <linux-kernel@...r.kernel.org>, devicetree@...r.kernel.org
Subject: Re: [PATCH v1 2/2] mfd: rt4505: Adds DT binding document for Richtek
 RT4831 MFD core

Hi,
  I seems I typo the wrong comment headline, not RT4505. It's RT4831.
Please just review the contents, I'll fix it in next series patch.


cy_huang <u0084500@...il.com> 於 2020年11月2日 週一 上午11:13寫道：
>
> From: ChiYuan Huang <cy_huang@...htek.com>
>
> Adds DT binding document for Richtek RT4831 MFD core.
>
> Signed-off-by: ChiYuan Huang <cy_huang@...htek.com>
> ---
>  .../devicetree/bindings/mfd/richtek,rt4831.yaml    | 89 ++++++++++++++++++++++
>  include/dt-bindings/leds/rt4831-backlight.h        | 23 ++++++
>  2 files changed, 112 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..c602d50
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/mfd/richtek,rt4831.yaml
> @@ -0,0 +1,89 @@
> +# SPDX-License-Identifier: GPL-2.0
> +%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 mutifunctional device that can provide display panel power for
> +  positive/negative voltage and also display panel wled driving.
> +
> +  For the display voltage output, the range is about 4V to 6.5V. It is sufficient
> +  to meet the current display panel design.
> +
> +  For the panel backlight, it can provide four channels driving capability
> +  Each 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>;
> +          };
> +          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.
> + */
> +
> +#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
>