linux-kernel - Re: [PATCH v5 5/8] mmc: sdhci-of-dwcmshc: add dwcmshc_pltfm

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Message-ID: <5e79be33-e914-4eb6-b8c4-a18b3c5dfcf7@intel.com>
Date: Fri, 19 Jul 2024 16:26:40 +0300
From: Adrian Hunter <adrian.hunter@...el.com>
To: Chen Wang <unicornxw@...il.com>, aou@...s.berkeley.edu,
 conor+dt@...nel.org, guoren@...nel.org, inochiama@...look.com,
 jszhang@...nel.org, krzysztof.kozlowski+dt@...aro.org, palmer@...belt.com,
 paul.walmsley@...ive.com, robh@...nel.org, ulf.hansson@...aro.org,
 devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
 linux-mmc@...r.kernel.org, linux-riscv@...ts.infradead.org,
 chao.wei@...hgo.com, haijiao.liu@...hgo.com, xiaoguang.xing@...hgo.com,
 tingzhu.wang@...hgo.com
Cc: Chen Wang <unicorn_wang@...look.com>
Subject: Re: [PATCH v5 5/8] mmc: sdhci-of-dwcmshc: add dwcmshc_pltfm_data

On 19/07/24 11:46, Chen Wang wrote:
> From: Chen Wang <unicorn_wang@...look.com>
> 
> Abstract dwcmshc_pltfm_data to hold the sdhci_pltfm_data
> plus some comoon operations of soc such as init/postinit.
> 
> Signed-off-by: Chen Wang <unicorn_wang@...look.com>
> ---
>  drivers/mmc/host/sdhci-of-dwcmshc.c | 83 +++++++++++++++++------------
>  1 file changed, 50 insertions(+), 33 deletions(-)
> 
> diff --git a/drivers/mmc/host/sdhci-of-dwcmshc.c b/drivers/mmc/host/sdhci-of-dwcmshc.c
> index 30e4cea8a058..972d03ec60e3 100644
> --- a/drivers/mmc/host/sdhci-of-dwcmshc.c
> +++ b/drivers/mmc/host/sdhci-of-dwcmshc.c
> @@ -205,6 +205,8 @@ struct rk35xx_priv {
>  
>  #define DWCMSHC_MAX_OTHER_CLKS 3
>  
> +struct dwcmshc_pltfm_data;

Forward declaration not needed

> +
>  struct dwcmshc_priv {
>  	struct clk	*bus_clk;
>  	int vendor_specific_area1; /* P_VENDOR_SPECIFIC_AREA1 reg */
> @@ -218,6 +220,12 @@ struct dwcmshc_priv {
>  	u16 flags;
>  };
>  
> +struct dwcmshc_pltfm_data {
> +	const struct sdhci_pltfm_data pdata;
> +	int (*init)(struct device *dev, struct sdhci_host *host, struct dwcmshc_priv *dwc_priv);
> +	void (*postinit)(struct sdhci_host *host, struct dwcmshc_priv *dwc_priv);
> +};
> +
>  static int dwcmshc_get_enable_other_clks(struct device *dev,
>  					 struct dwcmshc_priv *priv,
>  					 int num_clks,
> @@ -1048,39 +1056,52 @@ static const struct sdhci_ops sdhci_dwcmshc_cv18xx_ops = {
>  	.platform_execute_tuning = cv18xx_sdhci_execute_tuning,
>  };
>  
> -static const struct sdhci_pltfm_data sdhci_dwcmshc_pdata = {
> -	.ops = &sdhci_dwcmshc_ops,
> -	.quirks = SDHCI_QUIRK_CAP_CLOCK_BASE_BROKEN,
> -	.quirks2 = SDHCI_QUIRK2_PRESET_VALUE_BROKEN,
> +static const struct dwcmshc_pltfm_data sdhci_dwcmshc_pdata = {
> +	.pdata = {
> +		.ops = &sdhci_dwcmshc_ops,
> +		.quirks = SDHCI_QUIRK_CAP_CLOCK_BASE_BROKEN,
> +		.quirks2 = SDHCI_QUIRK2_PRESET_VALUE_BROKEN,
> +	},
>  };
>  
>  #ifdef CONFIG_ACPI
> -static const struct sdhci_pltfm_data sdhci_dwcmshc_bf3_pdata = {
> -	.ops = &sdhci_dwcmshc_ops,
> -	.quirks = SDHCI_QUIRK_CAP_CLOCK_BASE_BROKEN,
> -	.quirks2 = SDHCI_QUIRK2_PRESET_VALUE_BROKEN |
> -		   SDHCI_QUIRK2_ACMD23_BROKEN,
> +static const struct dwcmshc_pltfm_data sdhci_dwcmshc_bf3_pdata = {
> +	.pdata = {
> +		.ops = &sdhci_dwcmshc_ops,
> +		.quirks = SDHCI_QUIRK_CAP_CLOCK_BASE_BROKEN,
> +		.quirks2 = SDHCI_QUIRK2_PRESET_VALUE_BROKEN |
> +			   SDHCI_QUIRK2_ACMD23_BROKEN,
> +	},
>  };
>  #endif
>  
> -static const struct sdhci_pltfm_data sdhci_dwcmshc_rk35xx_pdata = {
> -	.ops = &sdhci_dwcmshc_rk35xx_ops,
> -	.quirks = SDHCI_QUIRK_CAP_CLOCK_BASE_BROKEN |
> -		  SDHCI_QUIRK_BROKEN_TIMEOUT_VAL,
> -	.quirks2 = SDHCI_QUIRK2_PRESET_VALUE_BROKEN |
> -		   SDHCI_QUIRK2_CLOCK_DIV_ZERO_BROKEN,
> +static const struct dwcmshc_pltfm_data sdhci_dwcmshc_rk35xx_pdata = {
> +	.pdata = {
> +		.ops = &sdhci_dwcmshc_rk35xx_ops,
> +		.quirks = SDHCI_QUIRK_CAP_CLOCK_BASE_BROKEN |
> +			  SDHCI_QUIRK_BROKEN_TIMEOUT_VAL,
> +		.quirks2 = SDHCI_QUIRK2_PRESET_VALUE_BROKEN |
> +			   SDHCI_QUIRK2_CLOCK_DIV_ZERO_BROKEN,
> +	},
> +	.init = dwcmshc_rk35xx_init,
> +	.postinit = dwcmshc_rk35xx_postinit,
>  };
>  
> -static const struct sdhci_pltfm_data sdhci_dwcmshc_th1520_pdata = {
> -	.ops = &sdhci_dwcmshc_th1520_ops,
> -	.quirks = SDHCI_QUIRK_CAP_CLOCK_BASE_BROKEN,
> -	.quirks2 = SDHCI_QUIRK2_PRESET_VALUE_BROKEN,
> +static const struct dwcmshc_pltfm_data sdhci_dwcmshc_th1520_pdata = {
> +	.pdata = {
> +		.ops = &sdhci_dwcmshc_th1520_ops,
> +		.quirks = SDHCI_QUIRK_CAP_CLOCK_BASE_BROKEN,
> +		.quirks2 = SDHCI_QUIRK2_PRESET_VALUE_BROKEN,
> +	},
> +	.init = th1520_init,
>  };
>  
> -static const struct sdhci_pltfm_data sdhci_dwcmshc_cv18xx_pdata = {
> -	.ops = &sdhci_dwcmshc_cv18xx_ops,
> -	.quirks = SDHCI_QUIRK_CAP_CLOCK_BASE_BROKEN,
> -	.quirks2 = SDHCI_QUIRK2_PRESET_VALUE_BROKEN,
> +static const struct dwcmshc_pltfm_data sdhci_dwcmshc_cv18xx_pdata = {
> +	.pdata = {
> +		.ops = &sdhci_dwcmshc_cv18xx_ops,
> +		.quirks = SDHCI_QUIRK_CAP_CLOCK_BASE_BROKEN,
> +		.quirks2 = SDHCI_QUIRK2_PRESET_VALUE_BROKEN,
> +	},
>  };
>  
>  static const struct cqhci_host_ops dwcmshc_cqhci_ops = {
> @@ -1196,7 +1217,7 @@ static int dwcmshc_probe(struct platform_device *pdev)
>  	struct sdhci_pltfm_host *pltfm_host;
>  	struct sdhci_host *host;
>  	struct dwcmshc_priv *priv;
> -	const struct sdhci_pltfm_data *pltfm_data;
> +	const struct dwcmshc_pltfm_data *pltfm_data;
>  	int err;
>  	u32 extra, caps;
>  
> @@ -1206,7 +1227,7 @@ static int dwcmshc_probe(struct platform_device *pdev)
>  		return -ENODEV;
>  	}
>  
> -	host = sdhci_pltfm_init(pdev, pltfm_data,
> +	host = sdhci_pltfm_init(pdev, &pltfm_data->pdata,
>  				sizeof(struct dwcmshc_priv));
>  	if (IS_ERR(host))
>  		return PTR_ERR(host);
> @@ -1251,16 +1272,12 @@ static int dwcmshc_probe(struct platform_device *pdev)
>  	host->mmc_host_ops.hs400_enhanced_strobe = dwcmshc_hs400_enhanced_strobe;
>  	host->mmc_host_ops.execute_tuning = dwcmshc_execute_tuning;
>  
> -	if (pltfm_data == &sdhci_dwcmshc_rk35xx_pdata) {
> -		err = dwcmshc_rk35xx_init(dev, host, priv);
> +	if (pltfm_data->init) {
> +		err = pltfm_data->init(&pdev->dev, host, priv);
>  		if (err)
>  			goto err_clk;
>  	}
>  
> -	if (pltfm_data == &sdhci_dwcmshc_th1520_pdata) {
> -		th1520_init(dev, host, priv);
> -	}
> -
>  #ifdef CONFIG_ACPI
>  	if (pltfm_data == &sdhci_dwcmshc_bf3_pdata)
>  		sdhci_enable_v4_mode(host);
> @@ -1288,8 +1305,8 @@ static int dwcmshc_probe(struct platform_device *pdev)
>  		dwcmshc_cqhci_init(host, pdev);
>  	}
>  
> -	if (priv->priv)
> -		dwcmshc_rk35xx_postinit(host, priv);
> +	if (pltfm_data->postinit)
> +		pltfm_data->postinit(host, priv);
>  
>  	err = __sdhci_add_host(host);
>  	if (err)