linux-kernel - Re: [PATCH v8 06/17] dt-bindings: mfd: amd,pensando-elbasr: Add AMD Pensando Elba System Resource chip

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Message-ID: <20221116223045.GA1130586-robh@kernel.org>
Date:   Wed, 16 Nov 2022 16:30:45 -0600
From:   Rob Herring <robh@...nel.org>
To:     Brad Larson <brad@...sando.io>
Cc:     krzysztof.kozlowski@...aro.org, adrian.hunter@...el.com,
        alcooperx@...il.com, andy.shevchenko@...il.com, arnd@...db.de,
        blarson@....com, brijeshkumar.singh@....com, broonie@...nel.org,
        catalin.marinas@....com, devicetree@...r.kernel.org,
        fancer.lancer@...il.com, gerg@...ux-m68k.org, gsomlo@...il.com,
        krzk@...nel.org, krzysztof.kozlowski+dt@...aro.org,
        lee.jones@...aro.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org, linux-mmc@...r.kernel.org,
        p.yadav@...com, p.zabel@...gutronix.de, piotrs@...ence.com,
        rdunlap@...radead.org, samuel@...lland.org,
        suravee.suthikulpanit@....com, thomas.lendacky@....com,
        ulf.hansson@...aro.org, will@...nel.org,
        yamada.masahiro@...ionext.com
Subject: Re: [PATCH v8 06/17] dt-bindings: mfd: amd,pensando-elbasr: Add AMD
 Pensando Elba System Resource chip

On Wed, Nov 16, 2022 at 11:39:40AM -0800, Brad Larson wrote:
> Add support for the AMD Pensando Elba SoC System Resource chip
> using the SPI interface.
> 
> Signed-off-by: Brad Larson <blarson@....com>
> ---
> 
> v8:
>  - Apply review request changes and picked the two unique examples
>    for the 4 chip-selects as one has the reset control support and
>    the other an interrupt.  Missed the --in-reply-to in git
>    send-email for v7, included in this update.

No, you haven't. By default in git, you don't have to do anything. See 
--thread and --no-chain-reply-to options. If you are messing with 
--in-reply-to, you are doing it wrong.

Please resend the whole series properly threaded.

> 
> v7:
>  - Use system-controller for the device with four chip-selects
>    connected over spi.
>  - Delete child by moving reset-controller into the parent.
>  - Updated and used dtschema-2022.11 and yamllint-1.28.0
> 
> v6:
>  - Expand description, rename nodes and change compatible usage
> 
> v5:
>  - Change to AMD Pensando instead of Pensando
> 
> v4:
>  - Change Maintained to Supported
> 
>  .../bindings/mfd/amd,pensando-elbasr.yaml     | 60 +++++++++++++++++++
>  1 file changed, 60 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/mfd/amd,pensando-elbasr.yaml
> 
> diff --git a/Documentation/devicetree/bindings/mfd/amd,pensando-elbasr.yaml b/Documentation/devicetree/bindings/mfd/amd,pensando-elbasr.yaml
> new file mode 100644
> index 000000000000..622c93402a86
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/mfd/amd,pensando-elbasr.yaml
> @@ -0,0 +1,60 @@
> +# SPDX-License-Identifier: (GPL-2.0-only or BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/mfd/amd,pensando-elbasr.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: AMD Pensando Elba SoC Resource Controller
> +
> +description: |
> +  AMD Pensando Elba SoC Resource Controller functions are
> +  accessed with four chip-selects.  Reset control is on CS0.

One device with 4 chip-selects? Then I'd expect 'reg = <0 1 2 3>;'

Hard to say more because I don't have the whole thread nor remember what 
exactly we discussed before. That was 100s of bindings ago...

> +
> +maintainers:
> +  - Brad Larson <blarson@....com>
> +
> +properties:
> +  compatible:
> +    enum:
> +      - amd,pensando-elbasr
> +
> +  "#reset-cells":
> +    const: 1
> +
> +  interrupts:
> +    maxItems: 1
> +
> +required:
> +  - compatible
> +  - reg
> +  - spi-max-frequency
> +
> +allOf:
> +  - $ref: /schemas/spi/spi-peripheral-props.yaml#
> +
> +unevaluatedProperties: false
> +
> +examples:
> +  - |
> +    #include <dt-bindings/interrupt-controller/arm-gic.h>
> +
> +    spi {
> +        #address-cells = <1>;
> +        #size-cells = <0>;
> +        num-cs = <4>;
> +
> +        system-controller@0 {
> +            compatible = "amd,pensando-elbasr";
> +            reg = <0>;
> +            spi-max-frequency = <12000000>;
> +            #reset-cells = <1>;
> +        };
> +
> +        system-controller@2 {
> +            compatible = "amd,pensando-elbasr";
> +            reg = <2>;
> +            spi-max-frequency = <12000000>;
> +            interrupt-parent = <&porta>;
> +            interrupts = <0 IRQ_TYPE_LEVEL_LOW>;
> +        };
> +    };
> -- 
> 2.17.1
> 
>