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Commit a6867836 authored by Vivek Gautam's avatar Vivek Gautam Committed by Kishon Vijay Abraham I
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phy: exynos5-usbdrd: Add facility for VBUS-BOOST-5V supply 



Some Exynos boards have a separate regulator controlling a
Boost 5V supply which goes as input for VBUS regulator.
So adding a control for the same in driver, to enable
vbus supply on the port.

Signed-off-by: default avatarVivek Gautam <gautam.vivek@samsung.com>
Signed-off-by: default avatarKishon Vijay Abraham I <kishon@ti.com>
parent 9bde18c1

drivers/phy/phy-exynos5-usbdrd.c

+30 −2
Original line number Diff line number Diff line
@@ -159,6 +159,8 @@ struct exynos5_usbdrd_phy_drvdata { 
 *	       reference clocks' for SS and HS operations

 * @ref_clk: reference clock to PHY block from which PHY's

 *	     operational clocks are derived

 * vbus: VBUS regulator for phy

 * vbus_boost: Boost regulator for VBUS present on few Exynos boards

 */

struct exynos5_usbdrd_phy {

	struct device *dev;
@@ -178,6 +180,7 @@ struct exynos5_usbdrd_phy { 
	u32 extrefclk;

	struct clk *ref_clk;

	struct regulator *vbus;

	struct regulator *vbus_boost;

};



static inline
@@ -460,11 +463,20 @@ static int exynos5_usbdrd_phy_power_on(struct phy *phy) 
	}



	/* Enable VBUS supply */

	if (phy_drd->vbus_boost) {

		ret = regulator_enable(phy_drd->vbus_boost);

		if (ret) {

			dev_err(phy_drd->dev,

				"Failed to enable VBUS boost supply\n");

			goto fail_vbus;

		}

	}



	if (phy_drd->vbus) {

		ret = regulator_enable(phy_drd->vbus);

		if (ret) {

			dev_err(phy_drd->dev, "Failed to enable VBUS supply\n");

			goto fail_vbus;

			goto fail_vbus_boost;

		}

	}
@@ -473,6 +485,10 @@ static int exynos5_usbdrd_phy_power_on(struct phy *phy) 


	return 0;



fail_vbus_boost:

	if (phy_drd->vbus_boost)

		regulator_disable(phy_drd->vbus_boost);



fail_vbus:

	clk_disable_unprepare(phy_drd->ref_clk);

	if (!phy_drd->drv_data->has_common_clk_gate) {
@@ -497,6 +513,8 @@ static int exynos5_usbdrd_phy_power_off(struct phy *phy) 
	/* Disable VBUS supply */

	if (phy_drd->vbus)

		regulator_disable(phy_drd->vbus);

	if (phy_drd->vbus_boost)

		regulator_disable(phy_drd->vbus_boost);



	clk_disable_unprepare(phy_drd->ref_clk);

	if (!phy_drd->drv_data->has_common_clk_gate) {
@@ -690,7 +708,7 @@ static int exynos5_usbdrd_phy_probe(struct platform_device *pdev) 
		break;

	}



	/* Get Vbus regulator */

	/* Get Vbus regulators */

	phy_drd->vbus = devm_regulator_get(dev, "vbus");

	if (IS_ERR(phy_drd->vbus)) {

		ret = PTR_ERR(phy_drd->vbus);
@@ -701,6 +719,16 @@ static int exynos5_usbdrd_phy_probe(struct platform_device *pdev) 
		phy_drd->vbus = NULL;

	}



	phy_drd->vbus_boost = devm_regulator_get(dev, "vbus-boost");

	if (IS_ERR(phy_drd->vbus_boost)) {

		ret = PTR_ERR(phy_drd->vbus_boost);

		if (ret == -EPROBE_DEFER)

			return ret;



		dev_warn(dev, "Failed to get VBUS boost supply regulator\n");

		phy_drd->vbus_boost = NULL;

	}



	dev_vdbg(dev, "Creating usbdrd_phy phy\n");



	for (i = 0; i < EXYNOS5_DRDPHYS_NUM; i++) {