linux-kernel - Re: [PATCH 2/2] mmc: sdhci-of-ma35d1: Add Novoton MA35D1 SDHCI driver

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Date: Sat, 22 Jun 2024 17:15:24 +0800
From: Shan-Chun Hung <shanchun1218@...il.com>
To: Philipp Zabel <p.zabel@...gutronix.de>, ulf.hansson@...aro.org,
 robh@...nel.org, krzk+dt@...nel.org, conor+dt@...nel.org,
 adrian.hunter@...el.com, pbrobinson@...il.com, serghox@...il.com,
 mcgrof@...nel.org, prabhakar.mahadev-lad.rj@...renesas.com,
 forbidden405@...look.com, tmaimon77@...il.com, andy.shevchenko@...il.com,
 linux-arm-kernel@...ts.infradead.org, linux-mmc@...r.kernel.org,
 devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Cc: ychuang3@...oton.com, schung@...oton.com
Subject: Re: [PATCH 2/2] mmc: sdhci-of-ma35d1: Add Novoton MA35D1 SDHCI driver

Dear Philipp,

Thanks for your review.

On 2024/6/21 下午 07:45, Philipp Zabel wrote:
> On Mi, 2024-06-19 at 13:46 +0800, Shan-Chun Hung wrote:
>> This adds the SDHCI driver for the MA35 series SoC. It is based upon the
>> SDHCI interface, but requires some extra initialization.
>>
>> Signed-off-by: schung<schung@...oton.com>
>> ---
>>   drivers/mmc/host/Kconfig           |  13 ++
>>   drivers/mmc/host/Makefile          |   1 +
>>   drivers/mmc/host/sdhci-of-ma35d1.c | 297 +++++++++++++++++++++++++++++
>>   3 files changed, 311 insertions(+)
>>   create mode 100644 drivers/mmc/host/sdhci-of-ma35d1.c
>>
> [...]
>> diff --git a/drivers/mmc/host/sdhci-of-ma35d1.c b/drivers/mmc/host/sdhci-of-ma35d1.c
>> new file mode 100644
>> index 000000000000..7714a5ab463d
>> --- /dev/null
>> +++ b/drivers/mmc/host/sdhci-of-ma35d1.c
>> @@ -0,0 +1,297 @@
> [...]
>> +static int ma35_probe(struct platform_device *pdev)
>> +{
>> +	struct device *dev = &pdev->dev;
>> +	struct sdhci_pltfm_host *pltfm_host;
>> +	struct sdhci_host *host;
>> +	struct ma35_priv *priv;
>> +	int err;
>> +	u32 extra, ctl;
>> +
>> +	host = sdhci_pltfm_init(pdev, &sdhci_ma35_pdata,
>> +				sizeof(struct ma35_priv));
>> +	if (IS_ERR(host))
>> +		return PTR_ERR(host);
>> +
>> +	/*
>> +	 * extra adma table cnt for cross 128M boundary handling.
>> +	 */
>> +	extra = DIV_ROUND_UP_ULL(dma_get_required_mask(&pdev->dev), SZ_128M);
>> +	if (extra > SDHCI_MAX_SEGS)
>> +		extra = SDHCI_MAX_SEGS;
>> +	host->adma_table_cnt += extra;
>> +	pltfm_host = sdhci_priv(host);
>> +	priv = sdhci_pltfm_priv(pltfm_host);
>> +
>> +	if (dev->of_node) {
>> +		pltfm_host->clk = devm_clk_get(&pdev->dev, NULL);
>> +		if (IS_ERR(pltfm_host->clk)) {
>> +			err = PTR_ERR(pltfm_host->clk);
>> +			dev_err(&pdev->dev, "failed to get clk: %d\n", err);
>> +			goto free_pltfm;
>> +		}
>> +		err = clk_prepare_enable(pltfm_host->clk);
>> +		if (err)
>> +			goto free_pltfm;
>> +	}
>> +
>> +	err = mmc_of_parse(host->mmc);
>> +	if (err)
>> +		goto err_clk;
>> +
>> +	priv->rst = devm_reset_control_get(&pdev->dev, NULL);
> Please use devm_reset_control_get_exclusive() instead.
>
> regards
> Philipp
OK, I will fix it.

Best Regards

Shan-Chun