linux-kernel - Re: [PATCH 1/3] mmc: dw_mmc: add support for hi3798mv200

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Date: Fri, 16 Feb 2024 03:20:29 +0800
From: Yang Xiwen <forbidden405@...look.com>
To: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
 Ulf Hansson <ulf.hansson@...aro.org>, Jaehoon Chung
 <jh80.chung@...sung.com>, Rob Herring <robh+dt@...nel.org>,
 Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
 Conor Dooley <conor+dt@...nel.org>
Cc: Igor Opaniuk <igor.opaniuk@...aro.org>,
 tianshuliang <tianshuliang@...ilicon.com>, David Yang <mmyangfl@...il.com>,
 linux-kernel@...r.kernel.org, linux-mmc@...r.kernel.org,
 devicetree@...r.kernel.org
Subject: Re: [PATCH 1/3] mmc: dw_mmc: add support for hi3798mv200

On 2/16/2024 3:15 AM, Krzysztof Kozlowski wrote:
> On 15/02/2024 18:46, Yang Xiwen via B4 Relay wrote:
>> From: Yang Xiwen <forbidden405@...look.com>
>>
>> Add support for Hi3798MV200 specific extension.
>>
>> Signed-off-by: Yang Xiwen <forbidden405@...look.com>
>
>> +
>> +static int dw_mci_hi3798mv200_init(struct dw_mci *host)
>> +{
>> +	struct dw_mci_hi3798mv200_priv *priv;
>> +	struct device_node *np = host->dev->of_node;
>> +
>> +	priv = devm_kzalloc(host->dev, sizeof(*priv), GFP_KERNEL);
>> +	if (!priv)
>> +		return -ENOMEM;
>> +
>> +	mmc_of_parse_clk_phase(host->dev, &priv->phase_map);
>> +
>> +	priv->sample_clk = devm_clk_get_enabled(host->dev, "ciu-sample");
>> +	if (IS_ERR(priv->sample_clk)) {
>> +		dev_err(host->dev, "failed to get enabled ciu-sample clock\n");
> syntax is: return dev_err_probe()
Will fix in next version.
>
>> +		return PTR_ERR(priv->sample_clk);
>> +	}
>> +
>> +	priv->drive_clk = devm_clk_get_enabled(host->dev, "ciu-drive");
>> +	if (IS_ERR(priv->drive_clk)) {
>> +		dev_err(host->dev, "failed to get enabled ciu-drive clock\n");
> syntax is: return dev_err_probe()
Will fix in next version.
>
>> +		return PTR_ERR(priv->drive_clk);
>> +	}
>> +
>> +	priv->sap_dll_reg = syscon_regmap_lookup_by_phandle(np, "hisilicon,sap-dll-reg");
>> +	if (IS_ERR(priv->sap_dll_reg)) {
>> +		dev_err(host->dev, "failed to get sap-dll-reg\n");
> syntax is: return dev_err_probe()
Will fix in next version.
>
>> +		return PTR_ERR(priv->sap_dll_reg);
>> +	}
>> +
>> +	host->priv = priv;
>> +	return 0;
>> +}
>> +
> ....
>
>> +
>> +MODULE_DEVICE_TABLE(of, dw_mci_hi3798mv200_match);
>> +static struct platform_driver dw_mci_hi3798mv200_driver = {
>> +	.probe = dw_mci_hi3798mv200_probe,
>> +	.remove_new = dw_mci_hi3798mv200_remove,
>> +	.driver = {
>> +		.name = "dwmmc_hi3798mv200",
>> +		.probe_type = PROBE_PREFER_ASYNCHRONOUS,
>> +		.of_match_table = dw_mci_hi3798mv200_match,
>> +	},
>> +};
>> +module_platform_driver(dw_mci_hi3798mv200_driver);
>> +
>> +MODULE_DESCRIPTION("HiSilicon Hi3798MV200 Specific DW-MSHC Driver Extension");
>> +MODULE_LICENSE("GPL");
>> +MODULE_ALIAS("platform:dwmmc_hi3798mv200");
> You should not need MODULE_ALIAS() in normal cases. If you need it,
> usually it means your device ID table is wrong (e.g. misses either
> entries or MODULE_DEVICE_TABLE()). MODULE_ALIAS() is not a substitute
> for incomplete ID table.
Will fix it in v2. I simply copied this from dw_mmc-hi3798cv200.c and 
s/cv200/mv200/. I'll remove it for dw_mmc-hi3798cv200.c in next version 
too because it seems not useful in that driver too.
> Best regards,
> Krzysztof
>

-- 
Regards,
Yang Xiwen