linux-kernel - Re: [PATCH v7 7/9] dt-bindings: mfd: Add bindings for Ampere Altra SMPro MFD driver

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Date:   Mon, 21 Mar 2022 11:08:45 +0100
From:   Krzysztof Kozlowski <krzk@...nel.org>
To:     Quan Nguyen <quan@...amperecomputing.com>,
        Lee Jones <lee.jones@...aro.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzk+dt@...nel.org>,
        Jean Delvare <jdelvare@...e.com>,
        Guenter Roeck <linux@...ck-us.net>,
        Jonathan Corbet <corbet@....net>,
        Derek Kiernan <derek.kiernan@...inx.com>,
        Dragan Cvetic <dragan.cvetic@...inx.com>,
        Arnd Bergmann <arnd@...db.de>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Thu Nguyen <thu@...amperecomputing.com>,
        Gustavo Pimentel <Gustavo.Pimentel@...opsys.com>,
        open list <linux-kernel@...r.kernel.org>,
        "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" 
        <devicetree@...r.kernel.org>,
        "open list:HARDWARE MONITORING" <linux-hwmon@...r.kernel.org>,
        "open list:DOCUMENTATION" <linux-doc@...r.kernel.org>,
        OpenBMC Maillist <openbmc@...ts.ozlabs.org>
Cc:     Open Source Submission <patches@...erecomputing.com>,
        Phong Vo <phong@...amperecomputing.com>,
        "Thang Q . Nguyen" <thang@...amperecomputing.com>
Subject: Re: [PATCH v7 7/9] dt-bindings: mfd: Add bindings for Ampere Altra
 SMPro MFD driver

On 21/03/2022 09:13, Quan Nguyen wrote:
> Adds device tree bindings for SMPro MFD driver found on the Mt.Jade
> hardware reference platform with Ampere's Altra Processor family.
> 
> The SMpro co-processor on Ampere Altra processor family is to monitor
> and report various data included hwmon-related info, RAS errors, and
> other miscellaneous information.
> 
> Signed-off-by: Quan Nguyen <quan@...amperecomputing.com>
> Reviewed-by: Rob Herring <robh@...nel.org>
> ---
> Changes in v7:
>   + None
> 
> Changes in v6:
>   + None
> 
>  .../devicetree/bindings/mfd/ampere,smpro.yaml | 48 +++++++++++++++++++
>  1 file changed, 48 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/mfd/ampere,smpro.yaml
> 
> diff --git a/Documentation/devicetree/bindings/mfd/ampere,smpro.yaml b/Documentation/devicetree/bindings/mfd/ampere,smpro.yaml
> new file mode 100644
> index 000000000000..c29d975c1bc3
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/mfd/ampere,smpro.yaml
> @@ -0,0 +1,48 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/mfd/ampere,smpro.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Ampere Altra SMPro firmware driver
> +
> +maintainers:
> +  - Quan Nguyen <quan@...amperecomputing.com>
> +
> +description: |
> +  Ampere Altra SMPro firmware may contain different blocks like hardware
> +  monitoring, error monitoring and other miscellaneous features.
> +
> +properties:
> +  compatible:
> +    enum:
> +      - ampere,smpro
> +
> +  reg:
> +    description:
> +      I2C device address.
> +    maxItems: 1
> +
> +  "#address-cells":
> +    const: 1
> +
> +  "#size-cells":
> +    const: 0

Why do you need address/size cells? Is the binding not complete? The
commit description does not mention such case.



Best regards,
Krzysztof