Use devm_clk_get_enabled() and devm_clk_get_optional_enabled()
to simplify code.

Signed-off-by: Yangtao Li <frank.li@vivo.com>
Reviewed-by: Maxime Chevallier <maxime.chevallier@bootlin.com>
Suggested-by: Serge Semin <fancer.lancer@gmail.com>
---
v2:
-remove unused 'ret'
-fix incompatible-pointer-types

 .../ethernet/stmicro/stmmac/stmmac_platform.c | 35 +++++--------------
 1 file changed, 8 insertions(+), 27 deletions(-)

diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c
index ad868e8d195d..4365afabf3c4 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c
@@ -415,8 +415,6 @@ static int stmmac_of_get_mac_mode(struct device_node *np)
 static void stmmac_remove_config_dt(struct platform_device *pdev,
 				    struct plat_stmmacenet_data *plat)
 {
-	clk_disable_unprepare(plat->stmmac_clk);
-	clk_disable_unprepare(plat->pclk);
 	of_node_put(plat->phy_node);
 	of_node_put(plat->mdio_node);
 }
@@ -436,7 +434,6 @@ stmmac_probe_config_dt(struct platform_device *pdev, u8 *mac)
 	struct plat_stmmacenet_data *plat;
 	struct stmmac_dma_cfg *dma_cfg;
 	int phy_mode;
-	void *ret;
 	int rc;
 
 	plat = devm_kzalloc(&pdev->dev, sizeof(*plat), GFP_KERNEL);
@@ -615,21 +612,16 @@ stmmac_probe_config_dt(struct platform_device *pdev, u8 *mac)
 
 	/* clock setup */
 	if (!of_device_is_compatible(np, "snps,dwc-qos-ethernet-4.10")) {
-		plat->stmmac_clk = devm_clk_get(&pdev->dev,
-						STMMAC_RESOURCE_NAME);
+		plat->stmmac_clk = devm_clk_get_enabled(&pdev->dev, STMMAC_RESOURCE_NAME);
 		if (IS_ERR(plat->stmmac_clk)) {
 			dev_warn(&pdev->dev, "Cannot get CSR clock\n");
 			plat->stmmac_clk = NULL;
 		}
-		clk_prepare_enable(plat->stmmac_clk);
 	}
 
-	plat->pclk = devm_clk_get_optional(&pdev->dev, "pclk");
-	if (IS_ERR(plat->pclk)) {
-		ret = plat->pclk;
-		goto error_pclk_get;
-	}
-	clk_prepare_enable(plat->pclk);
+	plat->pclk = devm_clk_get_optional_enabled(&pdev->dev, "pclk");
+	if (IS_ERR(plat->pclk))
+		return ERR_CAST(plat->pclk);
 
 	/* Fall-back to main clock in case of no PTP ref is passed */
 	plat->clk_ptp_ref = devm_clk_get(&pdev->dev, "ptp_ref");
@@ -644,26 +636,15 @@ stmmac_probe_config_dt(struct platform_device *pdev, u8 *mac)
 
 	plat->stmmac_rst = devm_reset_control_get_optional(&pdev->dev,
 							   STMMAC_RESOURCE_NAME);
-	if (IS_ERR(plat->stmmac_rst)) {
-		ret = plat->stmmac_rst;
-		goto error_hw_init;
-	}
+	if (IS_ERR(plat->stmmac_rst))
+		return ERR_CAST(plat->stmmac_rst);
 
 	plat->stmmac_ahb_rst = devm_reset_control_get_optional_shared(
 							&pdev->dev, "ahb");
-	if (IS_ERR(plat->stmmac_ahb_rst)) {
-		ret = plat->stmmac_ahb_rst;
-		goto error_hw_init;
-	}
+	if (IS_ERR(plat->stmmac_ahb_rst))
+		return ERR_CAST(plat->stmmac_ahb_rst);
 
 	return plat;
-
-error_hw_init:
-	clk_disable_unprepare(plat->pclk);
-error_pclk_get:
-	clk_disable_unprepare(plat->stmmac_clk);
-
-	return ret;
 }
 
 static void devm_stmmac_remove_config_dt(void *data)
-- 
2.39.0

On Tue, Aug 27, 2024 at 03:57:05AM -0600, Yangtao Li wrote:
> Use devm_clk_get_enabled() and devm_clk_get_optional_enabled()
> to simplify code.
> 
> Signed-off-by: Yangtao Li <frank.li@vivo.com>
> Reviewed-by: Maxime Chevallier <maxime.chevallier@bootlin.com>
> Suggested-by: Serge Semin <fancer.lancer@gmail.com>

Can't remember that I suggested the entire change, but merely the
ERR_CAST() macro utilization. Anyway the patch now looks good:

Reviewed-by: Serge Semin <fancer.lancer@gmail.com>

Thanks.
-Serge(y)

> ---
> v2:
> -remove unused 'ret'
> -fix incompatible-pointer-types
> 
>  .../ethernet/stmicro/stmmac/stmmac_platform.c | 35 +++++--------------
>  1 file changed, 8 insertions(+), 27 deletions(-)
> 
> diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c
> index ad868e8d195d..4365afabf3c4 100644
> --- a/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c
> +++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c
> @@ -415,8 +415,6 @@ static int stmmac_of_get_mac_mode(struct device_node *np)
>  static void stmmac_remove_config_dt(struct platform_device *pdev,
>  				    struct plat_stmmacenet_data *plat)
>  {
> -	clk_disable_unprepare(plat->stmmac_clk);
> -	clk_disable_unprepare(plat->pclk);
>  	of_node_put(plat->phy_node);
>  	of_node_put(plat->mdio_node);
>  }
> @@ -436,7 +434,6 @@ stmmac_probe_config_dt(struct platform_device *pdev, u8 *mac)
>  	struct plat_stmmacenet_data *plat;
>  	struct stmmac_dma_cfg *dma_cfg;
>  	int phy_mode;
> -	void *ret;
>  	int rc;
>  
>  	plat = devm_kzalloc(&pdev->dev, sizeof(*plat), GFP_KERNEL);
> @@ -615,21 +612,16 @@ stmmac_probe_config_dt(struct platform_device *pdev, u8 *mac)
>  
>  	/* clock setup */
>  	if (!of_device_is_compatible(np, "snps,dwc-qos-ethernet-4.10")) {
> -		plat->stmmac_clk = devm_clk_get(&pdev->dev,
> -						STMMAC_RESOURCE_NAME);
> +		plat->stmmac_clk = devm_clk_get_enabled(&pdev->dev, STMMAC_RESOURCE_NAME);
>  		if (IS_ERR(plat->stmmac_clk)) {
>  			dev_warn(&pdev->dev, "Cannot get CSR clock\n");
>  			plat->stmmac_clk = NULL;
>  		}
> -		clk_prepare_enable(plat->stmmac_clk);
>  	}
>  
> -	plat->pclk = devm_clk_get_optional(&pdev->dev, "pclk");
> -	if (IS_ERR(plat->pclk)) {
> -		ret = plat->pclk;
> -		goto error_pclk_get;
> -	}
> -	clk_prepare_enable(plat->pclk);
> +	plat->pclk = devm_clk_get_optional_enabled(&pdev->dev, "pclk");
> +	if (IS_ERR(plat->pclk))
> +		return ERR_CAST(plat->pclk);
>  
>  	/* Fall-back to main clock in case of no PTP ref is passed */
>  	plat->clk_ptp_ref = devm_clk_get(&pdev->dev, "ptp_ref");
> @@ -644,26 +636,15 @@ stmmac_probe_config_dt(struct platform_device *pdev, u8 *mac)
>  
>  	plat->stmmac_rst = devm_reset_control_get_optional(&pdev->dev,
>  							   STMMAC_RESOURCE_NAME);
> -	if (IS_ERR(plat->stmmac_rst)) {
> -		ret = plat->stmmac_rst;
> -		goto error_hw_init;
> -	}
> +	if (IS_ERR(plat->stmmac_rst))
> +		return ERR_CAST(plat->stmmac_rst);
>  
>  	plat->stmmac_ahb_rst = devm_reset_control_get_optional_shared(
>  							&pdev->dev, "ahb");
> -	if (IS_ERR(plat->stmmac_ahb_rst)) {
> -		ret = plat->stmmac_ahb_rst;
> -		goto error_hw_init;
> -	}
> +	if (IS_ERR(plat->stmmac_ahb_rst))
> +		return ERR_CAST(plat->stmmac_ahb_rst);
>  
>  	return plat;
> -
> -error_hw_init:
> -	clk_disable_unprepare(plat->pclk);
> -error_pclk_get:
> -	clk_disable_unprepare(plat->stmmac_clk);
> -
> -	return ret;
>  }
>  
>  static void devm_stmmac_remove_config_dt(void *data)
> -- 
> 2.39.0
>

On Tue, Aug 27, 2024 at 03:57:05AM -0600, Yangtao Li wrote:
> Use devm_clk_get_enabled() and devm_clk_get_optional_enabled()
> to simplify code.
> 
> Signed-off-by: Yangtao Li <frank.li@vivo.com>
> Reviewed-by: Maxime Chevallier <maxime.chevallier@bootlin.com>
> Suggested-by: Serge Semin <fancer.lancer@gmail.com>
> ---
> v2:
> -remove unused 'ret'
> -fix incompatible-pointer-types
> 
>  .../ethernet/stmicro/stmmac/stmmac_platform.c | 35 +++++--------------
>  1 file changed, 8 insertions(+), 27 deletions(-)
> 
> diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c
> index ad868e8d195d..4365afabf3c4 100644
> --- a/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c
> +++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c
> @@ -415,8 +415,6 @@ static int stmmac_of_get_mac_mode(struct device_node *np)
>  static void stmmac_remove_config_dt(struct platform_device *pdev,
>  				    struct plat_stmmacenet_data *plat)
>  {
> -	clk_disable_unprepare(plat->stmmac_clk);
> -	clk_disable_unprepare(plat->pclk);
>  	of_node_put(plat->phy_node);
>  	of_node_put(plat->mdio_node);
>  }
> @@ -436,7 +434,6 @@ stmmac_probe_config_dt(struct platform_device *pdev, u8 *mac)
>  	struct plat_stmmacenet_data *plat;
>  	struct stmmac_dma_cfg *dma_cfg;
>  	int phy_mode;
> -	void *ret;
>  	int rc;
>  
>  	plat = devm_kzalloc(&pdev->dev, sizeof(*plat), GFP_KERNEL);
> @@ -615,21 +612,16 @@ stmmac_probe_config_dt(struct platform_device *pdev, u8 *mac)
>  
>  	/* clock setup */
>  	if (!of_device_is_compatible(np, "snps,dwc-qos-ethernet-4.10")) {
> -		plat->stmmac_clk = devm_clk_get(&pdev->dev,
> -						STMMAC_RESOURCE_NAME);
> +		plat->stmmac_clk = devm_clk_get_enabled(&pdev->dev, STMMAC_RESOURCE_NAME);

As it looks like there will be a v3 anyway, a minor nit from my side:
Please preserve the line wrapping so that the lines remain <= 80 columns wide,
which is still preferred by Networking code.

		plat->stmmac_clk = devm_clk_get_enabled(&pdev->dev,
							STMMAC_RESOURCE_NAME);

>  		if (IS_ERR(plat->stmmac_clk)) {
>  			dev_warn(&pdev->dev, "Cannot get CSR clock\n");
>  			plat->stmmac_clk = NULL;
>  		}
> -		clk_prepare_enable(plat->stmmac_clk);
>  	}
>  

...