linux-kernel - Re: [PATCH v2 1/2] dt-binding: spi: npcm-pspi: Add npcm845 compatible

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Message-ID: <20220725225650.GA2898332-robh@kernel.org>
Date:   Mon, 25 Jul 2022 16:56:50 -0600
From:   Rob Herring <robh@...nel.org>
To:     Tomer Maimon <tmaimon77@...il.com>
Cc:     avifishman70@...il.com, tali.perry1@...il.com, joel@....id.au,
        venture@...gle.com, yuenn@...gle.com, benjaminfair@...gle.com,
        broonie@...nel.org, krzysztof.kozlowski+dt@...aro.org,
        openbmc@...ts.ozlabs.org, linux-spi@...r.kernel.org,
        linux-kernel@...r.kernel.org, devicetree@...r.kernel.org
Subject: Re: [PATCH v2 1/2] dt-binding: spi: npcm-pspi: Add npcm845 compatible

On Fri, Jul 22, 2022 at 02:41:35PM +0300, Tomer Maimon wrote:
> Add a compatible string for Nuvoton BMC NPCM845 PSPI.
> 
> Signed-off-by: Tomer Maimon <tmaimon77@...il.com>
> ---
>  Documentation/devicetree/bindings/spi/nuvoton,npcm-pspi.txt | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
> 
> diff --git a/Documentation/devicetree/bindings/spi/nuvoton,npcm-pspi.txt b/Documentation/devicetree/bindings/spi/nuvoton,npcm-pspi.txt
> index b98203ca656d..a4e72e52af59 100644
> --- a/Documentation/devicetree/bindings/spi/nuvoton,npcm-pspi.txt
> +++ b/Documentation/devicetree/bindings/spi/nuvoton,npcm-pspi.txt
> @@ -3,7 +3,8 @@ Nuvoton NPCM Peripheral Serial Peripheral Interface(PSPI) controller driver
>  Nuvoton NPCM7xx SOC support two PSPI channels.
>  
>  Required properties:
> - - compatible : "nuvoton,npcm750-pspi" for NPCM7XX BMC
> + - compatible : "nuvoton,npcm750-pspi" for Poleg NPCM7XX.

Who/What is Polog? Board/BMC vendor? If so, that should not be in SoC 
bindings.

> +				"nuvoton,npcm845-pspi" for Arbel NPCM8XX.

Same for Arbel.

To answer your question on fallback, just put:

    "nuvoton,npcm845-pspi", "nuvoton,npcm750-pspi" for NPCM8XX BMC


>   - #address-cells : should be 1. see spi-bus.txt
>   - #size-cells : should be 0. see spi-bus.txt
>   - specifies physical base address and size of the register.
> -- 
> 2.33.0
> 
>