linux-kernel - Re: [PATCH v2 5/8] dt-bindings: power: supply: max77658: Add ADI MAX77658 Battery

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Message-ID: <afeecd42-ecda-4d92-bbb5-6dcff84fca7d@linaro.org>
Date:   Wed, 22 Mar 2023 09:30:31 +0100
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     Zeynep Arslanbenzer <Zeynep.Arslanbenzer@...log.com>,
        lee@...nel.org, robh+dt@...nel.org,
        krzysztof.kozlowski+dt@...aro.org, sre@...nel.org,
        lgirdwood@...il.com, broonie@...nel.org
Cc:     Nurettin.Bolucu@...log.com, linux-kernel@...r.kernel.org,
        devicetree@...r.kernel.org, linux-pm@...r.kernel.org
Subject: Re: [PATCH v2 5/8] dt-bindings: power: supply: max77658: Add ADI
 MAX77658 Battery

On 22/03/2023 06:56, Zeynep Arslanbenzer wrote:
> Add ADI MAX77658 power supply devicetree document.
> 
> Signed-off-by: Nurettin Bolucu <Nurettin.Bolucu@...log.com>
> Signed-off-by: Zeynep Arslanbenzer <Zeynep.Arslanbenzer@...log.com>
> ---
>  .../power/supply/adi,max77658-battery.yaml    | 58 +++++++++++++++++++
>  1 file changed, 58 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/power/supply/adi,max77658-battery.yaml
> 
> diff --git a/Documentation/devicetree/bindings/power/supply/adi,max77658-battery.yaml b/Documentation/devicetree/bindings/power/supply/adi,max77658-battery.yaml
> new file mode 100644
> index 000000000000..0b696f7c4d1b
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/power/supply/adi,max77658-battery.yaml
> @@ -0,0 +1,58 @@
> +# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/power/supply/adi,max77658-battery.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Battery for MAX77658 PMIC from ADI.

Implement all previous comments, not just some.


> +
> +maintainers:
> +  - Nurettin Bolucu <Nurettin.Bolucu@...log.com>
> +  - Zeynep Arslanbenzer <Zeynep.Arslanbenzer@...log.com>
> +
> +description: |
> +  This module is part of the MAX77658 MFD device. For more details
> +  see Documentation/devicetree/bindings/mfd/adi,max77658.yaml.
> +
> +  The fuel gauge is represented as a sub-node of the PMIC node on the device tree.
> +
> +properties:
> +  compatible:
> +    const:
> +      adi,max77658-battery

It's one line.

> +
> +  reg:
> +    maxItems: 1
> +
> +  adi,valrt-min-microvolt:
> +    description: Minimum voltage value that triggers the alarm.
> +
> +  adi,valrt-max-microvolt:
> +    description: Maximum voltage value that triggers the alarm.

Use the same syntax as battery.yaml

> +
> +  adi,salrt-min-percent:
> +    description: Minimum percentage of battery that triggers the alarm.
> +
> +  adi,salrt-max-percent:
> +    description: Maximum percentage of battery that triggers the alarm.

That's not suitable for DT. Do not encode policies into DT.

> +
> +  adi,ialrt-min-microamp:
> +    description: Minimum current value that triggers the alarm.
> +
> +  adi,ialrt-max-microamp:
> +    description: Maximum current value that triggers the alarm.
> +
> +  monitored-battery:
> +    description: >
> +      phandle to a "simple-battery" compatible node.
> +
> +      This property must be a phandle to a node using the format described

You already said it above.

> +      in battery.yaml, with the following properties being required:
> +      - alert-celsius
> +
> +required:
> +  - compatible

Why reg and monitored-batter are not required?


Best regards,
Krzysztof