linux-kernel - Re: [PATCH 2/3] nvmem: sunxi_sid: Add support for H616 SID

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Date:   Fri, 11 Aug 2023 12:17:54 +0100
From:   Andre Przywara <andre.przywara@....com>
To:     Martin Botka <martin.botka@...ainline.org>
Cc:     Srinivas Kandagatla <srinivas.kandagatla@...aro.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Chen-Yu Tsai <wens@...e.org>,
        Jernej Skrabec <jernej.skrabec@...il.com>,
        Samuel Holland <samuel@...lland.org>,
        Maxime Ripard <mripard@...nel.org>, devicetree@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-sunxi@...ts.linux.dev,
        linux-kernel@...r.kernel.org, Alan Ma <tech@...u3d.com>,
        Marijn Suijten <marijn.suijten@...ainline.org>,
        AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...ainline.org>,
        Konrad Dybcio <konrad.dybcio@...ainline.org>
Subject: Re: [PATCH 2/3] nvmem: sunxi_sid: Add support for H616 SID

On Fri, 11 Aug 2023 13:02:35 +0200
Martin Botka <martin.botka@...ainline.org> wrote:

Hi Martin,

> Add support for the H616 SID controller.

thanks for upstreaming this!

> 
> The config can be reused from A64.
> 
> Signed-off-by: Martin Botka <martin.botka@...ainline.org>
> ---
>  drivers/nvmem/sunxi_sid.c | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/drivers/nvmem/sunxi_sid.c b/drivers/nvmem/sunxi_sid.c
> index a970f1741cc6..df6fb5e0b724 100644
> --- a/drivers/nvmem/sunxi_sid.c
> +++ b/drivers/nvmem/sunxi_sid.c
> @@ -216,6 +216,7 @@ static const struct of_device_id sunxi_sid_of_match[] = {
>  	{ .compatible = "allwinner,sun50i-a64-sid", .data = &sun50i_a64_cfg },
>  	{ .compatible = "allwinner,sun50i-h5-sid", .data = &sun50i_a64_cfg },
>  	{ .compatible = "allwinner,sun50i-h6-sid", .data = &sun50i_h6_cfg },
> +	{ .compatible = "allwinner,sun50i-h616-sid", .data = &sun50i_a64_cfg },

You don't need a new compatible string, then.
Just use 
  compatible = "allwinner,sun50i-h616-sid", "allwinner,sun50i-a64-sid";
in the DT, and add that combo to the binding, then you don't need any
driver patches at all - with the added benefit of that already working
with existing kernels.

Though I wonder if that has really only 256 bytes of fuses? Do we have any
evidence of that?

Cheers,
Andre

>  	{/* sentinel */},
>  };
>  MODULE_DEVICE_TABLE(of, sunxi_sid_of_match);
>