linux-kernel - Re: [PATCH v3 2/4] dt-bindings: mfd: Add bindings for Silicon Mitus SM5703 MFD

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Date:   Tue, 19 Apr 2022 09:01:45 -0500
From:   Rob Herring <robh@...nel.org>
To:     Markuss Broks <markuss.broks@...il.com>
Cc:     linux-kernel@...r.kernel.org, phone-devel@...r.kernel.org,
        ~postmarketos/upstreaming@...ts.sr.ht,
        Lee Jones <lee.jones@...aro.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski@...onical.com>,
        Liam Girdwood <lgirdwood@...il.com>,
        Mark Brown <broonie@...nel.org>, devicetree@...r.kernel.org
Subject: Re: [PATCH v3 2/4] dt-bindings: mfd: Add bindings for Silicon Mitus
 SM5703 MFD

On Fri, Apr 15, 2022 at 07:43:53PM +0300, Markuss Broks wrote:
> This patch adds device-tree bindings for the Silicon Mitus
> SM5703 MFD.
> 
> Signed-off-by: Markuss Broks <markuss.broks@...il.com>
> ---
>  .../bindings/mfd/siliconmitus,sm5703.yaml     | 95 +++++++++++++++++++
>  1 file changed, 95 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/mfd/siliconmitus,sm5703.yaml
> 
> diff --git a/Documentation/devicetree/bindings/mfd/siliconmitus,sm5703.yaml b/Documentation/devicetree/bindings/mfd/siliconmitus,sm5703.yaml
> new file mode 100644
> index 000000000000..aa676967593d
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/mfd/siliconmitus,sm5703.yaml
> @@ -0,0 +1,95 @@
> +# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/mfd/siliconmitus,sm5703.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Silicon Mitus SM5703 multi-function device bindings
> +
> +maintainers:
> +  - Markuss Broks <markuss.broks@...il.com>
> +
> +description: |
> +  Silicon Mitus SM5703 is a multi-function device, that consists of several
> +  modules, designed for a mobile phone use. It consists of
> +  LDO, Buck, USBLDO and VBUS regulators, a flash LED driver, a MUIC unit,
> +  a fuel gauge and a battery charger circuit. The MUIC and Fuel-Gauge units
> +  are separate from the main MFD, having their own i2c lines, while the
> +  LED driver, regulators and charger are sharing the main i2c bus of the MFD.
> +
> +properties:
> +  compatible:
> +    const: siliconmitus,sm5703-mfd

'-mfd' is redundant. Drop.

> +
> +  reg:
> +    description:
> +      I2C slave address.
> +    maxItems: 1
> +
> +  regulators:
> +    $ref: ../regulator/siliconmitus,sm5703-regulator.yaml

/schemas/regulator/...

> +    description:
> +      List of child nodes that specify the regulators.
> +
> +  reset-gpio:

'-gpios' is the preferred form even with 1.

Are the MUIC and Fuel-Gauge units independent from this reset?

> +    description:
> +      GPIO which is connected to the MRSTB pin.
> +    maxItems: 1
> +
> +required:
> +  - compatible
> +  - reg
> +  - regulators
> +
> +additionalProperties: false
> +
> +examples:
> +  - |
> +    i2c {
> +      #address-cells = <1>;
> +      #size-cells = <0>;
> +      mfd@49 {

'pmic' is the standard name.

> +        compatible = "siliconmitus,sm5703-mfd";
> +        reg = <0x49>;
> +
> +        reset-gpio = <&msmgpio 24 GPIO_ACTIVE_HIGH>;
> +        pinctrl-0 = <&mrstb_default>;
> +
> +        regulator {
> +          compatible = "siliconmitus,sm5703-regulator";
> +
> +          regulators {
> +            sm5703_ldo1: ldo1 {
> +              regulator-min-microvolt = <2800000>;
> +              regulator-max-microvolt = <2800000>;
> +            };
> +
> +            sm5703_ldo2: ldo2 {
> +              regulator-min-microvolt = <1500000>;
> +              regulator-max-microvolt = <3300000>;
> +            };
> +
> +            sm5703_ldo3: ldo3 {
> +              regulator-min-microvolt = <3300000>;
> +              regulator-max-microvolt = <3300000>;
> +            };
> +
> +            sm5703_usbldo1: usbldo1 {
> +              regulator-min-microvolt = <4800000>;
> +              regulator-max-microvolt = <4800000>;
> +            };
> +
> +            sm5703_usbldo2: usbldo2 {
> +              regulator-min-microvolt = <4800000>;
> +              regulator-max-microvolt = <4800000>;
> +            };
> +
> +            sm5703_vbus: vbus {
> +              regulator-min-microvolt = <5000000>;
> +              regulator-max-microvolt = <5000000>;
> +            };
> +          };
> +        };
> +      };
> +    };
> +...
> -- 
> 2.35.1
> 
>