linux-kernel - Re: [PATCH v5 2/2] memory: mtk-smi: mt8188: Add SMI reset and clamp for MT8188

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Message-ID: <6008832c-e175-4b02-90a6-f790dacd1d09@kernel.org>
Date: Wed, 12 Mar 2025 13:02:05 +0100
From: Krzysztof Kozlowski <krzk@...nel.org>
To: Friday Yang <friday.yang@...iatek.com>, Yong Wu <yong.wu@...iatek.com>,
 Rob Herring <robh@...nel.org>, Conor Dooley <conor+dt@...nel.org>,
 Matthias Brugger <matthias.bgg@...il.com>,
 AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>,
 Philipp Zabel <p.zabel@...gutronix.de>
Cc: linux-mediatek@...ts.infradead.org, linux-kernel@...r.kernel.org,
 devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
 Project_Global_Chrome_Upstream_Group@...iatek.com
Subject: Re: [PATCH v5 2/2] memory: mtk-smi: mt8188: Add SMI reset and clamp
 for MT8188

On 11/03/2025 13:23, Friday Yang wrote:
>  static int mtk_smi_device_link_common(struct device *dev, struct device **com_dev)
>  {
>  	struct platform_device *smi_com_pdev;
> @@ -528,6 +598,53 @@ static int mtk_smi_dts_clk_init(struct device *dev, struct mtk_smi *smi,
>  	return ret;
>  }
> 
> +static int mtk_smi_larb_parse_clamp_optional(struct mtk_smi_larb *larb)
> +{
> +	struct device *dev = larb->dev;
> +	const struct mtk_smi_larb_gen *larb_gen = larb->larb_gen;
> +	u32 larb_id;
> +	int ret;
> +
> +	/**

Not a kerneldoc

> +	 * Only SMI LARBs in camera, image and IPE subsys need to
> +	 * apply clamp and reset operations, others can be skipped.
> +	 */
> +	ret = of_property_read_u32(dev->of_node, "mediatek,larb-id", &larb_id);


...


>  static const struct mtk_smi_common_plat mtk_smi_common_mt8192 = {
>  	.type     = MTK_SMI_GEN2,
>  	.has_gals = true,
> @@ -729,6 +862,7 @@ static const struct of_device_id mtk_smi_common_of_ids[] = {
>  	{.compatible = "mediatek,mt8186-smi-common", .data = &mtk_smi_common_mt8186},
>  	{.compatible = "mediatek,mt8188-smi-common-vdo", .data = &mtk_smi_common_mt8188_vdo},
>  	{.compatible = "mediatek,mt8188-smi-common-vpp", .data = &mtk_smi_common_mt8188_vpp},
> +	{.compatible = "mediatek,mt8188-smi-sub-common", .data = &mtk_smi_sub_common_mt8188},
>  	{.compatible = "mediatek,mt8192-smi-common", .data = &mtk_smi_common_mt8192},
>  	{.compatible = "mediatek,mt8195-smi-common-vdo", .data = &mtk_smi_common_mt8195_vdo},
>  	{.compatible = "mediatek,mt8195-smi-common-vpp", .data = &mtk_smi_common_mt8195_vpp},
> @@ -787,7 +921,10 @@ static int mtk_smi_common_probe(struct platform_device *pdev)
>  			return ret;
>  	}
> 
> -	pm_runtime_enable(dev);
> +	ret = devm_pm_runtime_enable(dev);
> +	if (ret)
> +		return ret;
> +
>  	platform_set_drvdata(pdev, common);
>  	return 0;
>  }
> @@ -798,7 +935,6 @@ static void mtk_smi_common_remove(struct platform_device *pdev)
> 
>  	if (common->plat->type == MTK_SMI_GEN2_SUB_COMM)
>  		device_link_remove(&pdev->dev, common->smi_common_dev);
> -	pm_runtime_disable(&pdev->dev);
Does not look related to this patch. Is it some sort of cleanup to devm?

Best regards,
Krzysztof