Patchwork [v2,04/13] phy: ti-pipe3: cleanup clock handling

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Submitter Roger Quadros
Date March 6, 2014, 2:38 p.m.
Message ID <1394116729-28811-5-git-send-email-rogerq@ti.com>
Download mbox | patch
Permalink /patch/327478/
State New
Headers show

Comments

Roger Quadros - March 6, 2014, 2:38 p.m.
As this driver is no longer USB specific, use generic clock names.
- Use 'wkupclk', 'sysclk' and 'refclk' clock-names. Update DT binding info.
- Fix PLL_SD_SHIFT from 9 to 10
- Don't separate prepare/unprepare clock from enable/disable. This
ensures optimal power savings.

Update omap5 usb3_phy device tree node.

CC: Benoît Cousson <bcousson@baylibre.com>
CC: Tony Lindgren <tony@atomide.com>
Signed-off-by: Roger Quadros <rogerq@ti.com>
---
 Documentation/devicetree/bindings/phy/ti-phy.txt | 12 ++++++
 arch/arm/boot/dts/omap5.dtsi                     |  7 ++-
 drivers/phy/phy-ti-pipe3.c                       | 55 ++++++++++++------------
 3 files changed, 46 insertions(+), 28 deletions(-)
Kishon Vijay Abraham I - March 6, 2014, 3:45 p.m.
Roger,

On Thursday 06 March 2014 08:08 PM, Roger Quadros wrote:
> As this driver is no longer USB specific, use generic clock names.
> - Use 'wkupclk', 'sysclk' and 'refclk' clock-names. Update DT binding info.
> - Fix PLL_SD_SHIFT from 9 to 10
> - Don't separate prepare/unprepare clock from enable/disable. This
> ensures optimal power savings.
>
> Update omap5 usb3_phy device tree node.
>
> CC: Benoît Cousson <bcousson@baylibre.com>
> CC: Tony Lindgren <tony@atomide.com>
> Signed-off-by: Roger Quadros <rogerq@ti.com>
> ---
>   Documentation/devicetree/bindings/phy/ti-phy.txt | 12 ++++++
>   arch/arm/boot/dts/omap5.dtsi                     |  7 ++-
>   drivers/phy/phy-ti-pipe3.c                       | 55 ++++++++++++------------

Here you have to split the patch. omap5.dtsi should be a separate patch 
to Tony. I could take only phy-ti-pipe3.c again since ti-phy.txt is only 
in Felipe's branch.

Regards
Kishon

>   3 files changed, 46 insertions(+), 28 deletions(-)
>
> diff --git a/Documentation/devicetree/bindings/phy/ti-phy.txt b/Documentation/devicetree/bindings/phy/ti-phy.txt
> index 28e674b..8d13349 100644
> --- a/Documentation/devicetree/bindings/phy/ti-phy.txt
> +++ b/Documentation/devicetree/bindings/phy/ti-phy.txt
> @@ -59,6 +59,12 @@ Required properties:
>      filled in "reg".
>    - #phy-cells: determine the number of cells that should be given in the
>      phandle while referencing this phy.
> + - clocks: a list of phandles and clock-specifier pairs, one for each entry in
> +   clock-names.
> + - clock-names: should include:
> +   * "wkupclk" - wakup clock.
> +   * "sysclk" - system clock.
> +   * "refclk" - reference clock.
>
>   Optional properties:
>    - ctrl-module : phandle of the control module used by PHY driver to power on
> @@ -74,4 +80,10 @@ usb3phy@4a084400 {
>   	reg-names = "phy_rx", "phy_tx", "pll_ctrl";
>   	ctrl-module = <&omap_control_usb>;
>   	#phy-cells = <0>;
> +	clocks = <&usb_phy_cm_clk32k>,
> +		 <&sys_clkin>,
> +		 <&usb_otg_ss_refclk960m>;
> +	clock-names =	"wkupclk",
> +			"sysclk",
> +			"refclk";
>   };
> diff --git a/arch/arm/boot/dts/omap5.dtsi b/arch/arm/boot/dts/omap5.dtsi
> index 859a800..e47601a 100644
> --- a/arch/arm/boot/dts/omap5.dtsi
> +++ b/arch/arm/boot/dts/omap5.dtsi
> @@ -778,7 +778,12 @@
>   				      <0x4a084800 0x64>,
>   				      <0x4a084c00 0x40>;
>   				reg-names = "phy_rx", "phy_tx", "pll_ctrl";
> -				ctrl-module = <&omap_control_usb3phy>;
> +				clocks = <&usb_phy_cm_clk32k>,
> +					 <&sys_clkin>,
> +					 <&usb_otg_ss_refclk960m>;
> +				clock-names =	"wkupclk",
> +						"sysclk",
> +						"refclk";
>   				#phy-cells = <0>;
>   			};
>   		};
> diff --git a/drivers/phy/phy-ti-pipe3.c b/drivers/phy/phy-ti-pipe3.c
> index fd029b1..211703c 100644
> --- a/drivers/phy/phy-ti-pipe3.c
> +++ b/drivers/phy/phy-ti-pipe3.c
> @@ -45,7 +45,7 @@
>   #define	PLL_SELFREQDCO_MASK	0x0000000E
>   #define	PLL_SELFREQDCO_SHIFT	0x1
>   #define	PLL_SD_MASK		0x0003FC00
> -#define	PLL_SD_SHIFT		0x9
> +#define	PLL_SD_SHIFT		10
>   #define	SET_PLL_GO		0x1
>   #define	PLL_TICOPWDN		0x10000
>   #define	PLL_LOCK		0x2
> @@ -72,7 +72,7 @@ struct ti_pipe3 {
>   	struct device		*control_dev;
>   	struct clk		*wkupclk;
>   	struct clk		*sys_clk;
> -	struct clk		*optclk;
> +	struct clk		*refclk;
>   };
>
>   struct pipe3_dpll_map {
> @@ -270,23 +270,21 @@ static int ti_pipe3_probe(struct platform_device *pdev)
>
>   	phy->dev		= &pdev->dev;
>
> -	phy->wkupclk = devm_clk_get(phy->dev, "usb_phy_cm_clk32k");
> +	phy->wkupclk = devm_clk_get(phy->dev, "wkupclk");
>   	if (IS_ERR(phy->wkupclk)) {
> -		dev_err(&pdev->dev, "unable to get usb_phy_cm_clk32k\n");
> +		dev_err(&pdev->dev, "unable to get wkupclk\n");
>   		return PTR_ERR(phy->wkupclk);
>   	}
> -	clk_prepare(phy->wkupclk);
>
> -	phy->optclk = devm_clk_get(phy->dev, "usb_otg_ss_refclk960m");
> -	if (IS_ERR(phy->optclk)) {
> -		dev_err(&pdev->dev, "unable to get usb_otg_ss_refclk960m\n");
> -		return PTR_ERR(phy->optclk);
> +	phy->refclk = devm_clk_get(phy->dev, "refclk");
> +	if (IS_ERR(phy->refclk)) {
> +		dev_err(&pdev->dev, "unable to get refclk\n");
> +		return PTR_ERR(phy->refclk);
>   	}
> -	clk_prepare(phy->optclk);
>
> -	phy->sys_clk = devm_clk_get(phy->dev, "sys_clkin");
> +	phy->sys_clk = devm_clk_get(phy->dev, "sysclk");
>   	if (IS_ERR(phy->sys_clk)) {
> -		pr_err("%s: unable to get sys_clkin\n", __func__);
> +		dev_err(&pdev->dev, "unable to get sysclk\n");
>   		return -EINVAL;
>   	}
>
> @@ -326,10 +324,6 @@ static int ti_pipe3_probe(struct platform_device *pdev)
>
>   static int ti_pipe3_remove(struct platform_device *pdev)
>   {
> -	struct ti_pipe3 *phy = platform_get_drvdata(pdev);
> -
> -	clk_unprepare(phy->wkupclk);
> -	clk_unprepare(phy->optclk);
>   	if (!pm_runtime_suspended(&pdev->dev))
>   		pm_runtime_put(&pdev->dev);
>   	pm_runtime_disable(&pdev->dev);
> @@ -343,8 +337,10 @@ static int ti_pipe3_runtime_suspend(struct device *dev)
>   {
>   	struct ti_pipe3	*phy = dev_get_drvdata(dev);
>
> -	clk_disable(phy->wkupclk);
> -	clk_disable(phy->optclk);
> +	if (!IS_ERR(phy->wkupclk))
> +		clk_disable_unprepare(phy->wkupclk);
> +	if (!IS_ERR(phy->refclk))
> +		clk_disable_unprepare(phy->refclk);
>
>   	return 0;
>   }
> @@ -354,22 +350,27 @@ static int ti_pipe3_runtime_resume(struct device *dev)
>   	u32 ret = 0;
>   	struct ti_pipe3	*phy = dev_get_drvdata(dev);
>
> -	ret = clk_enable(phy->optclk);
> -	if (ret) {
> -		dev_err(phy->dev, "Failed to enable optclk %d\n", ret);
> -		goto err1;
> +	if (!IS_ERR(phy->refclk)) {
> +		ret = clk_prepare_enable(phy->refclk);
> +		if (ret) {
> +			dev_err(phy->dev, "Failed to enable refclk %d\n", ret);
> +			goto err1;
> +		}
>   	}
>
> -	ret = clk_enable(phy->wkupclk);
> -	if (ret) {
> -		dev_err(phy->dev, "Failed to enable wkupclk %d\n", ret);
> -		goto err2;
> +	if (!IS_ERR(phy->wkupclk)) {
> +		ret = clk_prepare_enable(phy->wkupclk);
> +		if (ret) {
> +			dev_err(phy->dev, "Failed to enable wkupclk %d\n", ret);
> +			goto err2;
> +		}
>   	}
>
>   	return 0;
>
>   err2:
> -	clk_disable(phy->optclk);
> +	if (!IS_ERR(phy->refclk))
> +		clk_disable_unprepare(phy->refclk);
>
>   err1:
>   	return ret;
>

Patch

diff --git a/Documentation/devicetree/bindings/phy/ti-phy.txt b/Documentation/devicetree/bindings/phy/ti-phy.txt
index 28e674b..8d13349 100644
--- a/Documentation/devicetree/bindings/phy/ti-phy.txt
+++ b/Documentation/devicetree/bindings/phy/ti-phy.txt
@@ -59,6 +59,12 @@  Required properties:
    filled in "reg".
  - #phy-cells: determine the number of cells that should be given in the
    phandle while referencing this phy.
+ - clocks: a list of phandles and clock-specifier pairs, one for each entry in
+   clock-names.
+ - clock-names: should include:
+   * "wkupclk" - wakup clock.
+   * "sysclk" - system clock.
+   * "refclk" - reference clock.
 
 Optional properties:
  - ctrl-module : phandle of the control module used by PHY driver to power on
@@ -74,4 +80,10 @@  usb3phy@4a084400 {
 	reg-names = "phy_rx", "phy_tx", "pll_ctrl";
 	ctrl-module = <&omap_control_usb>;
 	#phy-cells = <0>;
+	clocks = <&usb_phy_cm_clk32k>,
+		 <&sys_clkin>,
+		 <&usb_otg_ss_refclk960m>;
+	clock-names =	"wkupclk",
+			"sysclk",
+			"refclk";
 };
diff --git a/arch/arm/boot/dts/omap5.dtsi b/arch/arm/boot/dts/omap5.dtsi
index 859a800..e47601a 100644
--- a/arch/arm/boot/dts/omap5.dtsi
+++ b/arch/arm/boot/dts/omap5.dtsi
@@ -778,7 +778,12 @@ 
 				      <0x4a084800 0x64>,
 				      <0x4a084c00 0x40>;
 				reg-names = "phy_rx", "phy_tx", "pll_ctrl";
-				ctrl-module = <&omap_control_usb3phy>;
+				clocks = <&usb_phy_cm_clk32k>,
+					 <&sys_clkin>,
+					 <&usb_otg_ss_refclk960m>;
+				clock-names =	"wkupclk",
+						"sysclk",
+						"refclk";
 				#phy-cells = <0>;
 			};
 		};
diff --git a/drivers/phy/phy-ti-pipe3.c b/drivers/phy/phy-ti-pipe3.c
index fd029b1..211703c 100644
--- a/drivers/phy/phy-ti-pipe3.c
+++ b/drivers/phy/phy-ti-pipe3.c
@@ -45,7 +45,7 @@ 
 #define	PLL_SELFREQDCO_MASK	0x0000000E
 #define	PLL_SELFREQDCO_SHIFT	0x1
 #define	PLL_SD_MASK		0x0003FC00
-#define	PLL_SD_SHIFT		0x9
+#define	PLL_SD_SHIFT		10
 #define	SET_PLL_GO		0x1
 #define	PLL_TICOPWDN		0x10000
 #define	PLL_LOCK		0x2
@@ -72,7 +72,7 @@  struct ti_pipe3 {
 	struct device		*control_dev;
 	struct clk		*wkupclk;
 	struct clk		*sys_clk;
-	struct clk		*optclk;
+	struct clk		*refclk;
 };
 
 struct pipe3_dpll_map {
@@ -270,23 +270,21 @@  static int ti_pipe3_probe(struct platform_device *pdev)
 
 	phy->dev		= &pdev->dev;
 
-	phy->wkupclk = devm_clk_get(phy->dev, "usb_phy_cm_clk32k");
+	phy->wkupclk = devm_clk_get(phy->dev, "wkupclk");
 	if (IS_ERR(phy->wkupclk)) {
-		dev_err(&pdev->dev, "unable to get usb_phy_cm_clk32k\n");
+		dev_err(&pdev->dev, "unable to get wkupclk\n");
 		return PTR_ERR(phy->wkupclk);
 	}
-	clk_prepare(phy->wkupclk);
 
-	phy->optclk = devm_clk_get(phy->dev, "usb_otg_ss_refclk960m");
-	if (IS_ERR(phy->optclk)) {
-		dev_err(&pdev->dev, "unable to get usb_otg_ss_refclk960m\n");
-		return PTR_ERR(phy->optclk);
+	phy->refclk = devm_clk_get(phy->dev, "refclk");
+	if (IS_ERR(phy->refclk)) {
+		dev_err(&pdev->dev, "unable to get refclk\n");
+		return PTR_ERR(phy->refclk);
 	}
-	clk_prepare(phy->optclk);
 
-	phy->sys_clk = devm_clk_get(phy->dev, "sys_clkin");
+	phy->sys_clk = devm_clk_get(phy->dev, "sysclk");
 	if (IS_ERR(phy->sys_clk)) {
-		pr_err("%s: unable to get sys_clkin\n", __func__);
+		dev_err(&pdev->dev, "unable to get sysclk\n");
 		return -EINVAL;
 	}
 
@@ -326,10 +324,6 @@  static int ti_pipe3_probe(struct platform_device *pdev)
 
 static int ti_pipe3_remove(struct platform_device *pdev)
 {
-	struct ti_pipe3 *phy = platform_get_drvdata(pdev);
-
-	clk_unprepare(phy->wkupclk);
-	clk_unprepare(phy->optclk);
 	if (!pm_runtime_suspended(&pdev->dev))
 		pm_runtime_put(&pdev->dev);
 	pm_runtime_disable(&pdev->dev);
@@ -343,8 +337,10 @@  static int ti_pipe3_runtime_suspend(struct device *dev)
 {
 	struct ti_pipe3	*phy = dev_get_drvdata(dev);
 
-	clk_disable(phy->wkupclk);
-	clk_disable(phy->optclk);
+	if (!IS_ERR(phy->wkupclk))
+		clk_disable_unprepare(phy->wkupclk);
+	if (!IS_ERR(phy->refclk))
+		clk_disable_unprepare(phy->refclk);
 
 	return 0;
 }
@@ -354,22 +350,27 @@  static int ti_pipe3_runtime_resume(struct device *dev)
 	u32 ret = 0;
 	struct ti_pipe3	*phy = dev_get_drvdata(dev);
 
-	ret = clk_enable(phy->optclk);
-	if (ret) {
-		dev_err(phy->dev, "Failed to enable optclk %d\n", ret);
-		goto err1;
+	if (!IS_ERR(phy->refclk)) {
+		ret = clk_prepare_enable(phy->refclk);
+		if (ret) {
+			dev_err(phy->dev, "Failed to enable refclk %d\n", ret);
+			goto err1;
+		}
 	}
 
-	ret = clk_enable(phy->wkupclk);
-	if (ret) {
-		dev_err(phy->dev, "Failed to enable wkupclk %d\n", ret);
-		goto err2;
+	if (!IS_ERR(phy->wkupclk)) {
+		ret = clk_prepare_enable(phy->wkupclk);
+		if (ret) {
+			dev_err(phy->dev, "Failed to enable wkupclk %d\n", ret);
+			goto err2;
+		}
 	}
 
 	return 0;
 
 err2:
-	clk_disable(phy->optclk);
+	if (!IS_ERR(phy->refclk))
+		clk_disable_unprepare(phy->refclk);
 
 err1:
 	return ret;