linux-kernel - Re: [RFC PATCH 1/5] dt-bindings: mfd: add entry for the Marvell 88PM88X PMICs

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Date: Mon, 18 Dec 2023 09:17:18 -0600
From: Rob Herring <robh@...nel.org>
To: Karel Balej <karelb@...li.ms.mff.cuni.cz>
Cc: Karel Balej <balejk@...fyz.cz>, Dmitry Torokhov <dmitry.torokhov@...il.com>, Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>, Conor Dooley <conor+dt@...nel.org>, Lee Jones <lee@...nel.org>, linux-input@...r.kernel.org, devicetree@...r.kernel.org, linux-kernel@...r.kernel.org, Duje Mihanović <duje.mihanovic@...le.hr>, ~postmarketos/upstreaming@...ts.sr.ht, phone-devel@...r.kernel.org
Subject: Re: [RFC PATCH 1/5] dt-bindings: mfd: add entry for the Marvell
 88PM88X PMICs

On Sun, Dec 17, 2023 at 02:16:59PM +0100, Karel Balej wrote:
> From: Karel Balej <balejk@...fyz.cz>
> 
> Marvell 88PM880 and 88PM886 are two similar PMICs with mostly matching
> register mapping and subdevices such as onkey, regulators or battery and
> charger. Both seem to come in two revisions which seem to be handled
> slightly differently in some subdevice drivers.
> 
> Signed-off-by: Karel Balej <balejk@...fyz.cz>
> ---
>  .../bindings/mfd/marvell,88pm88x.yaml         | 55 +++++++++++++++++++
>  1 file changed, 55 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/mfd/marvell,88pm88x.yaml
> 
> diff --git a/Documentation/devicetree/bindings/mfd/marvell,88pm88x.yaml b/Documentation/devicetree/bindings/mfd/marvell,88pm88x.yaml
> new file mode 100644
> index 000000000000..e075729c360f
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/mfd/marvell,88pm88x.yaml
> @@ -0,0 +1,55 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/mfd/marvell,88pm88x.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Marvell 88PM88X PMIC core MFD

Drop 'MFD'.

> +
> +maintainers:
> +  - Karel Balej <balejk@...fyz.cz>
> +
> +description: |

Don't need '|' as there is no formatting to preserve.

> +  Marvell 88PM880 and 88PM886 are two similar PMICs providing
> +  several functions such as onkey, regulators or battery and
> +  charger. Both seem to come in two revisions -- A0 and A1.
> +
> +properties:
> +  compatible:
> +    const: marvell,88pm886-a1

The description talks about 4 different devices, but only 1 here. 

Do you expect to need A0 support? Devices with these PMICs should be 
known and few, right? 

> +
> +  reg:
> +    description: I2C device address

Drop.

> +    maxItems: 1
> +
> +  interrupt-controller: true
> +
> +  interrupts:
> +    maxItems: 1
> +
> +  "#interrupt-cells":
> +    const: 2
> +
> +required:
> +  - compatible
> +  - reg
> +  - interrupt-controller
> +  - interrupts
> +
> +additionalProperties: false
> +
> +examples:
> +  - |
> +    i2c {
> +      #address-cells = <1>;
> +      #size-cells = <0>;
> +      pmic0: 88pm886@30 {

pmic@30

Drop the unused label.

> +        compatible = "marvell,88pm886-a1";
> +        reg = <0x30>;
> +        interrupts = <0 4 IRQ_TYPE_LEVEL_HIGH>;

You need the header for this.

You'll find the input binding fails too. Please test your bindings 
before sending.

> +        interrupt-parent = <&gic>;
> +        interrupt-controller;
> +        #interrupt-cells = <1>;
> +      };
> +    };
> +...
> -- 
> 2.43.0
>