linux-kernel - Re: [PATCH v3 3/3] nvmem: mtk-efuse: Modify driver for getting chip information

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Message-ID: <80b61d00-ac87-4880-a535-0a5fdd3bed83@collabora.com>
Date: Wed, 20 Dec 2023 12:02:22 +0100
From: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>
To: William-tw Lin <william-tw.lin@...iatek.com>,
 Rob Herring <robh+dt@...nel.org>,
 Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
 Conor Dooley <conor+dt@...nel.org>, Matthias Brugger
 <matthias.bgg@...il.com>,
 Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
Cc: devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
 linux-arm-kernel@...ts.infradead.org, linux-mediatek@...ts.infradead.org
Subject: Re: [PATCH v3 3/3] nvmem: mtk-efuse: Modify driver for getting chip
 information

Il 20/12/23 11:39, William-tw Lin ha scritto:
> Retrieval of soc info is needed. This patch includes the following:
> 1. Register socinfo device in mtk-efuse.c
> 

nvmem: mtk-efuse: Register MediaTek socinfo driver from efuse

The socinfo driver reads chip information from eFuses and does not need
any devicetree node. Register it from mtk-efuse.

While at it, also add the name for this driver's nvmem_config.


^^^ that's a proper commit title and description :-)

> Signed-off-by: William-tw Lin <william-tw.lin@...iatek.com>
> ---
>   drivers/nvmem/mtk-efuse.c | 11 ++++++++++-
>   1 file changed, 10 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/nvmem/mtk-efuse.c b/drivers/nvmem/mtk-efuse.c
> index 84f05b40a411..3914e039e288 100644
> --- a/drivers/nvmem/mtk-efuse.c
> +++ b/drivers/nvmem/mtk-efuse.c
> @@ -68,6 +68,7 @@ static int mtk_efuse_probe(struct platform_device *pdev)
>   	struct nvmem_config econfig = {};
>   	struct mtk_efuse_priv *priv;
>   	const struct mtk_efuse_pdata *pdata;
> +	struct platform_device *socinfo;
>   
>   	priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
>   	if (!priv)
> @@ -85,11 +86,19 @@ static int mtk_efuse_probe(struct platform_device *pdev)
>   	econfig.size = resource_size(res);
>   	econfig.priv = priv;
>   	econfig.dev = dev;
> +	econfig.name = "mtk-efuse";
>   	if (pdata->uses_post_processing)
>   		econfig.fixup_dt_cell_info = &mtk_efuse_fixup_dt_cell_info;
>   	nvmem = devm_nvmem_register(dev, &econfig);
> +	if (IS_ERR(nvmem))
> +		return PTR_ERR(nvmem);
>   
> -	return PTR_ERR_OR_ZERO(nvmem);
> +	socinfo = platform_device_register_data(&pdev->dev, "mtk-socinfo",
> +						PLATFORM_DEVID_AUTO, NULL, 0);
> +	if (IS_ERR(socinfo))
> +		dev_info(dev, "MediaTek SoC Information will be unavailable\n");
> +

	if (IS_ERR(socinfo))
		dev_info(dev, "MediaTek SoC Information will be unavailable\n");

	platform_set_drvdata(pdev, socinfo);
	return 0;

> +	return 0;
>   }
>   
>   static const struct mtk_efuse_pdata mtk_mt8186_efuse_pdata = {


static void mtk_efuse_remove(struct platform_device *pdev)
{
	struct platform_device *socinfo = platform_get_drvdata(pdev);

	if (!IS_ERR_OR_NULL(socinfo))
		platform_device_unregister(socinfo);
}

static struct platform_driver mtk_efuse_driver = {
	.probe = mtk_efuse_probe,
	.remove_new = mtk_efuse_remove, <---- add this
	.driver = {
		.name = "mediatek,efuse",
		.of_match_table = mtk_efuse_of_match,
	}
};

After those additions, it's good for me.

Thanks,
Angelo