diff mbox series

[v3,3/4] mmc: sdhci-of-dwcmshc: extract init function for rk35xx/th1520

Message ID 459e341a32128ffbae5acdc77a1c835cbee582e6.1718241495.git.unicorn_wang@outlook.com (mailing list archive)
State New
Headers show
Series mmc: sdhci-of-dwcmshc: enhance framework | expand

Commit Message

Chen Wang June 13, 2024, 1:43 a.m. UTC 
From: Chen Wang <unicorn_wang@outlook.com>

Extract init function for rk35xx/th1520, which is an intermediate
process before further optimization.

Signed-off-by: Chen Wang <unicorn_wang@outlook.com>
---
 drivers/mmc/host/sdhci-of-dwcmshc.c | 83 ++++++++++++++++-------------
 1 file changed, 46 insertions(+), 37 deletions(-)

Comments

Adrian Hunter June 14, 2024, 10:33 a.m. UTC | #1 
On 13/06/24 04:43, Chen Wang wrote:
> From: Chen Wang <unicorn_wang@outlook.com>
> 
> Extract init function for rk35xx/th1520, which is an intermediate
> process before further optimization.
> 
> Signed-off-by: Chen Wang <unicorn_wang@outlook.com>
> ---
>  drivers/mmc/host/sdhci-of-dwcmshc.c | 83 ++++++++++++++++-------------
>  1 file changed, 46 insertions(+), 37 deletions(-)
> 
> diff --git a/drivers/mmc/host/sdhci-of-dwcmshc.c b/drivers/mmc/host/sdhci-of-dwcmshc.c
> index 346d2d323a05..38ab755aa044 100644
> --- a/drivers/mmc/host/sdhci-of-dwcmshc.c
> +++ b/drivers/mmc/host/sdhci-of-dwcmshc.c
> @@ -749,10 +749,19 @@ static void rk35xx_sdhci_reset(struct sdhci_host *host, u8 mask)
>  	sdhci_reset(host, mask);
>  }
>  
> -static int rk35xx_init(struct sdhci_host *host, struct dwcmshc_priv *dwc_priv)
> +static int rk35xx_init(struct device *dev, struct sdhci_host *host, struct dwcmshc_priv *dwc_priv)
>  {
>  	int err;
> -	struct rk35xx_priv *priv = dwc_priv->priv;
> +	struct rk35xx_priv *priv;
> +
> +	priv = devm_kzalloc(dev, sizeof(struct rk35xx_priv), GFP_KERNEL);
> +	if (!priv)
> +		return -ENOMEM;
> +
> +	if (of_device_is_compatible(dev->of_node, "rockchip,rk3588-dwcmshc"))
> +		priv->devtype = DWCMSHC_RK3588;
> +	else
> +		priv->devtype = DWCMSHC_RK3568;
>  
>  	priv->reset = devm_reset_control_array_get_optional_exclusive(mmc_dev(host->mmc));
>  	if (IS_ERR(priv->reset)) {
> @@ -787,6 +796,8 @@ static int rk35xx_init(struct sdhci_host *host, struct dwcmshc_priv *dwc_priv)
>  	sdhci_writel(host, 0, DWCMSHC_EMMC_DLL_TXCLK);
>  	sdhci_writel(host, 0, DWCMSHC_EMMC_DLL_STRBIN);
>  
> +	dwc_priv->priv = priv;
> +
>  	return 0;
>  }
>  
> @@ -915,6 +926,35 @@ static void th1520_sdhci_reset(struct sdhci_host *host, u8 mask)
>  	}
>  }
>  
> +static int th1520_init(struct device *dev,
> +		       struct sdhci_host *host,
> +		       struct dwcmshc_priv *dwc_priv)
> +{
> +	dwc_priv->delay_line = PHY_SDCLKDL_DC_DEFAULT;
> +
> +	if (device_property_read_bool(dev, "mmc-ddr-1_8v") ||
> +	    device_property_read_bool(dev, "mmc-hs200-1_8v") ||
> +	    device_property_read_bool(dev, "mmc-hs400-1_8v"))
> +		dwc_priv->flags |= FLAG_IO_FIXED_1V8;
> +	else
> +		dwc_priv->flags &= ~FLAG_IO_FIXED_1V8;
> +
> +	/*
> +	 * start_signal_voltage_switch() will try 3.3V first
> +	 * then 1.8V. Use SDHCI_SIGNALING_180 rather than
> +	 * SDHCI_SIGNALING_330 to avoid setting voltage to 3.3V
> +	 * in sdhci_start_signal_voltage_switch().
> +	 */
> +	if (dwc_priv->flags & FLAG_IO_FIXED_1V8) {
> +		host->flags &= ~SDHCI_SIGNALING_330;
> +		host->flags |=  SDHCI_SIGNALING_180;
> +	}
> +
> +	sdhci_enable_v4_mode(host);
> +
> +	return 0;
> +}
> +
>  static void cv18xx_sdhci_reset(struct sdhci_host *host, u8 mask)
>  {
>  	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
> @@ -1230,46 +1270,15 @@ static int dwcmshc_probe(struct platform_device *pdev)
>  	host->mmc_host_ops.execute_tuning = dwcmshc_execute_tuning;
>  
>  	if (pltfm_data == &sdhci_dwcmshc_rk35xx_pdata) {
> -		rk_priv = devm_kzalloc(&pdev->dev, sizeof(struct rk35xx_priv), GFP_KERNEL);
> -		if (!rk_priv) {
> -			err = -ENOMEM;
> -			goto err_clk;
> -		}
> -
> -		if (of_device_is_compatible(pdev->dev.of_node, "rockchip,rk3588-dwcmshc"))
> -			rk_priv->devtype = DWCMSHC_RK3588;
> -		else
> -			rk_priv->devtype = DWCMSHC_RK3568;
> -
> -		priv->priv = rk_priv;
> -
> -		err = rk35xx_init(host, priv);
> +		err = rk35xx_init(&pdev->dev, host, priv);

rk_priv is used further on, but it is not assigned anymore.

>  		if (err)
>  			goto err_clk;
>  	}
>  
>  	if (pltfm_data == &sdhci_dwcmshc_th1520_pdata) {
> -		priv->delay_line = PHY_SDCLKDL_DC_DEFAULT;
> -
> -		if (device_property_read_bool(dev, "mmc-ddr-1_8v") ||
> -		    device_property_read_bool(dev, "mmc-hs200-1_8v") ||
> -		    device_property_read_bool(dev, "mmc-hs400-1_8v"))
> -			priv->flags |= FLAG_IO_FIXED_1V8;
> -		else
> -			priv->flags &= ~FLAG_IO_FIXED_1V8;
> -
> -		/*
> -		 * start_signal_voltage_switch() will try 3.3V first
> -		 * then 1.8V. Use SDHCI_SIGNALING_180 rather than
> -		 * SDHCI_SIGNALING_330 to avoid setting voltage to 3.3V
> -		 * in sdhci_start_signal_voltage_switch().
> -		 */
> -		if (priv->flags & FLAG_IO_FIXED_1V8) {
> -			host->flags &= ~SDHCI_SIGNALING_330;
> -			host->flags |=  SDHCI_SIGNALING_180;
> -		}
> -
> -		sdhci_enable_v4_mode(host);
> +		err = th1520_init(&pdev->dev, host, priv);
> +		if (err)
> +			goto err_clk;
>  	}
>  
>  #ifdef CONFIG_ACPI
Chen Wang June 18, 2024, 12:04 a.m. UTC | #2 
On 2024/6/14 18:33, Adrian Hunter wrote:
> On 13/06/24 04:43, Chen Wang wrote:
>> From: Chen Wang <unicorn_wang@outlook.com>
[......]
>>
>>
>>   static void cv18xx_sdhci_reset(struct sdhci_host *host, u8 mask)
>>   {
>>   	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
>> @@ -1230,46 +1270,15 @@ static int dwcmshc_probe(struct platform_device *pdev)
>>   	host->mmc_host_ops.execute_tuning = dwcmshc_execute_tuning;
>>   
>>   	if (pltfm_data == &sdhci_dwcmshc_rk35xx_pdata) {
>> -		rk_priv = devm_kzalloc(&pdev->dev, sizeof(struct rk35xx_priv), GFP_KERNEL);
>> -		if (!rk_priv) {
>> -			err = -ENOMEM;
>> -			goto err_clk;
>> -		}
>> -
>> -		if (of_device_is_compatible(pdev->dev.of_node, "rockchip,rk3588-dwcmshc"))
>> -			rk_priv->devtype = DWCMSHC_RK3588;
>> -		else
>> -			rk_priv->devtype = DWCMSHC_RK3568;
>> -
>> -		priv->priv = rk_priv;
>> -
>> -		err = rk35xx_init(host, priv);
>> +		err = rk35xx_init(&pdev->dev, host, priv);
> rk_priv is used further on, but it is not assigned anymore.

You are right. It seems unnecessary to provide this patch separately 
just to extract the init function, and it also violates the principle of 
atomicity of patch modification. I will merge this patch with the next one.

[......]
diff mbox series

Patch

diff --git a/drivers/mmc/host/sdhci-of-dwcmshc.c b/drivers/mmc/host/sdhci-of-dwcmshc.c
index 346d2d323a05..38ab755aa044 100644
--- a/drivers/mmc/host/sdhci-of-dwcmshc.c
+++ b/drivers/mmc/host/sdhci-of-dwcmshc.c
@@ -749,10 +749,19 @@  static void rk35xx_sdhci_reset(struct sdhci_host *host, u8 mask)
 	sdhci_reset(host, mask);
 }
 
-static int rk35xx_init(struct sdhci_host *host, struct dwcmshc_priv *dwc_priv)
+static int rk35xx_init(struct device *dev, struct sdhci_host *host, struct dwcmshc_priv *dwc_priv)
 {
 	int err;
-	struct rk35xx_priv *priv = dwc_priv->priv;
+	struct rk35xx_priv *priv;
+
+	priv = devm_kzalloc(dev, sizeof(struct rk35xx_priv), GFP_KERNEL);
+	if (!priv)
+		return -ENOMEM;
+
+	if (of_device_is_compatible(dev->of_node, "rockchip,rk3588-dwcmshc"))
+		priv->devtype = DWCMSHC_RK3588;
+	else
+		priv->devtype = DWCMSHC_RK3568;
 
 	priv->reset = devm_reset_control_array_get_optional_exclusive(mmc_dev(host->mmc));
 	if (IS_ERR(priv->reset)) {
@@ -787,6 +796,8 @@  static int rk35xx_init(struct sdhci_host *host, struct dwcmshc_priv *dwc_priv)
 	sdhci_writel(host, 0, DWCMSHC_EMMC_DLL_TXCLK);
 	sdhci_writel(host, 0, DWCMSHC_EMMC_DLL_STRBIN);
 
+	dwc_priv->priv = priv;
+
 	return 0;
 }
 
@@ -915,6 +926,35 @@  static void th1520_sdhci_reset(struct sdhci_host *host, u8 mask)
 	}
 }
 
+static int th1520_init(struct device *dev,
+		       struct sdhci_host *host,
+		       struct dwcmshc_priv *dwc_priv)
+{
+	dwc_priv->delay_line = PHY_SDCLKDL_DC_DEFAULT;
+
+	if (device_property_read_bool(dev, "mmc-ddr-1_8v") ||
+	    device_property_read_bool(dev, "mmc-hs200-1_8v") ||
+	    device_property_read_bool(dev, "mmc-hs400-1_8v"))
+		dwc_priv->flags |= FLAG_IO_FIXED_1V8;
+	else
+		dwc_priv->flags &= ~FLAG_IO_FIXED_1V8;
+
+	/*
+	 * start_signal_voltage_switch() will try 3.3V first
+	 * then 1.8V. Use SDHCI_SIGNALING_180 rather than
+	 * SDHCI_SIGNALING_330 to avoid setting voltage to 3.3V
+	 * in sdhci_start_signal_voltage_switch().
+	 */
+	if (dwc_priv->flags & FLAG_IO_FIXED_1V8) {
+		host->flags &= ~SDHCI_SIGNALING_330;
+		host->flags |=  SDHCI_SIGNALING_180;
+	}
+
+	sdhci_enable_v4_mode(host);
+
+	return 0;
+}
+
 static void cv18xx_sdhci_reset(struct sdhci_host *host, u8 mask)
 {
 	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
@@ -1230,46 +1270,15 @@  static int dwcmshc_probe(struct platform_device *pdev)
 	host->mmc_host_ops.execute_tuning = dwcmshc_execute_tuning;
 
 	if (pltfm_data == &sdhci_dwcmshc_rk35xx_pdata) {
-		rk_priv = devm_kzalloc(&pdev->dev, sizeof(struct rk35xx_priv), GFP_KERNEL);
-		if (!rk_priv) {
-			err = -ENOMEM;
-			goto err_clk;
-		}
-
-		if (of_device_is_compatible(pdev->dev.of_node, "rockchip,rk3588-dwcmshc"))
-			rk_priv->devtype = DWCMSHC_RK3588;
-		else
-			rk_priv->devtype = DWCMSHC_RK3568;
-
-		priv->priv = rk_priv;
-
-		err = rk35xx_init(host, priv);
+		err = rk35xx_init(&pdev->dev, host, priv);
 		if (err)
 			goto err_clk;
 	}
 
 	if (pltfm_data == &sdhci_dwcmshc_th1520_pdata) {
-		priv->delay_line = PHY_SDCLKDL_DC_DEFAULT;
-
-		if (device_property_read_bool(dev, "mmc-ddr-1_8v") ||
-		    device_property_read_bool(dev, "mmc-hs200-1_8v") ||
-		    device_property_read_bool(dev, "mmc-hs400-1_8v"))
-			priv->flags |= FLAG_IO_FIXED_1V8;
-		else
-			priv->flags &= ~FLAG_IO_FIXED_1V8;
-
-		/*
-		 * start_signal_voltage_switch() will try 3.3V first
-		 * then 1.8V. Use SDHCI_SIGNALING_180 rather than
-		 * SDHCI_SIGNALING_330 to avoid setting voltage to 3.3V
-		 * in sdhci_start_signal_voltage_switch().
-		 */
-		if (priv->flags & FLAG_IO_FIXED_1V8) {
-			host->flags &= ~SDHCI_SIGNALING_330;
-			host->flags |=  SDHCI_SIGNALING_180;
-		}
-
-		sdhci_enable_v4_mode(host);
+		err = th1520_init(&pdev->dev, host, priv);
+		if (err)
+			goto err_clk;
 	}
 
 #ifdef CONFIG_ACPI