Merge tag 'phy-for-4.2-rc' of git://git.kernel.org/pub/scm/linux/kernel/git/kishon/linux-phy into usb-linus

Kishon writes:

phy: for 4.2-rc

*) Fix PIPE3 PM so that all its users (PCIe, SATA, USB) can
   idle and resume
*) Fix a compiler error in pxa
*) Fix pll divider values in berlin-usb phy driver

Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>

3 files changed, 45 insertions, 133 deletions

diff --git a/drivers/phy/Kconfig b/drivers/phy/Kconfig
index c0e6ede3e27d..6b8dd162f644 100644
--- a/drivers/phy/Kconfig
+++ b/drivers/phy/Kconfig
@@ -56,6 +56,7 @@ config PHY_EXYNOS_MIPI_VIDEO
 
 config PHY_PXA_28NM_HSIC
 	tristate "Marvell USB HSIC 28nm PHY Driver"
+	depends on HAS_IOMEM
 	select GENERIC_PHY
 	help
 	  Enable this to support Marvell USB HSIC PHY driver for Marvell
@@ -66,6 +67,7 @@ config PHY_PXA_28NM_HSIC
 
 config PHY_PXA_28NM_USB2
 	tristate "Marvell USB 2.0 28nm PHY Driver"
+	depends on HAS_IOMEM
 	select GENERIC_PHY
 	help
 	  Enable this to support Marvell USB 2.0 PHY driver for Marvell
diff --git a/drivers/phy/phy-berlin-usb.c b/drivers/phy/phy-berlin-usb.c
index c6fc95b53083..335e06d66ed9 100644
--- a/drivers/phy/phy-berlin-usb.c
+++ b/drivers/phy/phy-berlin-usb.c
@@ -105,9 +105,9 @@
 
 static const u32 phy_berlin_pll_dividers[] = {
 	/* Berlin 2 */
-	CLK_REF_DIV(0xc) | FEEDBACK_CLK_DIV(0x54),
-	/* Berlin 2CD */
 	CLK_REF_DIV(0x6) | FEEDBACK_CLK_DIV(0x55),
+	/* Berlin 2CD/Q */
+	CLK_REF_DIV(0xc) | FEEDBACK_CLK_DIV(0x54),
 };
 
 struct phy_berlin_usb_priv {
diff --git a/drivers/phy/phy-ti-pipe3.c b/drivers/phy/phy-ti-pipe3.c
index 53f295c1bab1..3510b81db3fa 100644
--- a/drivers/phy/phy-ti-pipe3.c
+++ b/drivers/phy/phy-ti-pipe3.c
@@ -28,7 +28,6 @@
 #include <linux/delay.h>
 #include <linux/phy/omap_control_phy.h>
 #include <linux/of_platform.h>
-#include <linux/spinlock.h>
 
 #define	PLL_STATUS		0x00000004
 #define	PLL_GO			0x00000008
@@ -83,10 +82,6 @@ struct ti_pipe3 {
 	struct clk		*refclk;
 	struct clk		*div_clk;
 	struct pipe3_dpll_map	*dpll_map;
-	bool			enabled;
-	spinlock_t		lock;	/* serialize clock enable/disable */
-	/* the below flag is needed specifically for SATA */
-	bool			refclk_enabled;
 };
 
 static struct pipe3_dpll_map dpll_map_usb[] = {
@@ -137,6 +132,9 @@ static struct pipe3_dpll_params *ti_pipe3_get_dpll_params(struct ti_pipe3 *phy)
 	return NULL;
 }
 
+static int ti_pipe3_enable_clocks(struct ti_pipe3 *phy);
+static void ti_pipe3_disable_clocks(struct ti_pipe3 *phy);
+
 static int ti_pipe3_power_off(struct phy *x)
 {
 	struct ti_pipe3 *phy = phy_get_drvdata(x);
@@ -217,6 +215,7 @@ static int ti_pipe3_init(struct phy *x)
 	u32 val;
 	int ret = 0;
 
+	ti_pipe3_enable_clocks(phy);
 	/*
 	 * Set pcie_pcs register to 0x96 for proper functioning of phy
 	 * as recommended in AM572x TRM SPRUHZ6, section 18.5.2.2, table
@@ -250,33 +249,35 @@ static int ti_pipe3_exit(struct phy *x)
 	u32 val;
 	unsigned long timeout;
 
-	/* SATA DPLL can't be powered down due to Errata i783 and PCIe
-	 * does not have internal DPLL
-	 */
-	if (of_device_is_compatible(phy->dev->of_node, "ti,phy-pipe3-sata") ||
-	    of_device_is_compatible(phy->dev->of_node, "ti,phy-pipe3-pcie"))
+	/* SATA DPLL can't be powered down due to Errata i783 */
+	if (of_device_is_compatible(phy->dev->of_node, "ti,phy-pipe3-sata"))
 		return 0;
 
-	/* Put DPLL in IDLE mode */
-	val = ti_pipe3_readl(phy->pll_ctrl_base, PLL_CONFIGURATION2);
-	val |= PLL_IDLE;
-	ti_pipe3_writel(phy->pll_ctrl_base, PLL_CONFIGURATION2, val);
-
-	/* wait for LDO and Oscillator to power down */
-	timeout = jiffies + msecs_to_jiffies(PLL_IDLE_TIME);
-	do {
-		cpu_relax();
-		val = ti_pipe3_readl(phy->pll_ctrl_base, PLL_STATUS);
-		if ((val & PLL_TICOPWDN) && (val & PLL_LDOPWDN))
-			break;
-	} while (!time_after(jiffies, timeout));
+	/* PCIe doesn't have internal DPLL */
+	if (!of_device_is_compatible(phy->dev->of_node, "ti,phy-pipe3-pcie")) {
+		/* Put DPLL in IDLE mode */
+		val = ti_pipe3_readl(phy->pll_ctrl_base, PLL_CONFIGURATION2);
+		val |= PLL_IDLE;
+		ti_pipe3_writel(phy->pll_ctrl_base, PLL_CONFIGURATION2, val);
 
-	if (!(val & PLL_TICOPWDN) || !(val & PLL_LDOPWDN)) {
-		dev_err(phy->dev, "Failed to power down: PLL_STATUS 0x%x\n",
-			val);
-		return -EBUSY;
+		/* wait for LDO and Oscillator to power down */
+		timeout = jiffies + msecs_to_jiffies(PLL_IDLE_TIME);
+		do {
+			cpu_relax();
+			val = ti_pipe3_readl(phy->pll_ctrl_base, PLL_STATUS);
+			if ((val & PLL_TICOPWDN) && (val & PLL_LDOPWDN))
+				break;
+		} while (!time_after(jiffies, timeout));
+
+		if (!(val & PLL_TICOPWDN) || !(val & PLL_LDOPWDN)) {
+			dev_err(phy->dev, "Failed to power down: PLL_STATUS 0x%x\n",
+				val);
+			return -EBUSY;
+		}
 	}
 
+	ti_pipe3_disable_clocks(phy);
+
 	return 0;
 }
 static struct phy_ops ops = {
@@ -306,7 +307,6 @@ static int ti_pipe3_probe(struct platform_device *pdev)
 		return -ENOMEM;
 
 	phy->dev		= &pdev->dev;
-	spin_lock_init(&phy->lock);
 
 	if (!of_device_is_compatible(node, "ti,phy-pipe3-pcie")) {
 		match = of_match_device(ti_pipe3_id_table, &pdev->dev);
@@ -402,6 +402,10 @@ static int ti_pipe3_probe(struct platform_device *pdev)
 
 	platform_set_drvdata(pdev, phy);
 	pm_runtime_enable(phy->dev);
+	/* Prevent auto-disable of refclk for SATA PHY due to Errata i783 */
+	if (of_device_is_compatible(node, "ti,phy-pipe3-sata"))
+		if (!IS_ERR(phy->refclk))
+			clk_prepare_enable(phy->refclk);
 
 	generic_phy = devm_phy_create(phy->dev, NULL, &ops);
 	if (IS_ERR(generic_phy))
@@ -413,63 +417,33 @@ static int ti_pipe3_probe(struct platform_device *pdev)
 	if (IS_ERR(phy_provider))
 		return PTR_ERR(phy_provider);
 
-	pm_runtime_get(&pdev->dev);
-
 	return 0;
 }
 
 static int ti_pipe3_remove(struct platform_device *pdev)
 {
-	if (!pm_runtime_suspended(&pdev->dev))
-		pm_runtime_put(&pdev->dev);
 	pm_runtime_disable(&pdev->dev);
 
 	return 0;
 }
 
-#ifdef CONFIG_PM
-static int ti_pipe3_enable_refclk(struct ti_pipe3 *phy)
+static int ti_pipe3_enable_clocks(struct ti_pipe3 *phy)
 {
-	if (!IS_ERR(phy->refclk) && !phy->refclk_enabled) {
-		int ret;
+	int ret = 0;
 
+	if (!IS_ERR(phy->refclk)) {
 		ret = clk_prepare_enable(phy->refclk);
 		if (ret) {
 			dev_err(phy->dev, "Failed to enable refclk %d\n", ret);
 			return ret;
 		}
-		phy->refclk_enabled = true;
 	}
 
-	return 0;
-}
-
-static void ti_pipe3_disable_refclk(struct ti_pipe3 *phy)
-{
-	if (!IS_ERR(phy->refclk))
-		clk_disable_unprepare(phy->refclk);
-
-	phy->refclk_enabled = false;
-}
-
-static int ti_pipe3_enable_clocks(struct ti_pipe3 *phy)
-{
-	int ret = 0;
-	unsigned long flags;
-
-	spin_lock_irqsave(&phy->lock, flags);
-	if (phy->enabled)
-		goto err1;
-
-	ret = ti_pipe3_enable_refclk(phy);
-	if (ret)
-		goto err1;
-
 	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;
+			goto disable_refclk;
 		}
 	}
 
@@ -477,96 +451,33 @@ static int ti_pipe3_enable_clocks(struct ti_pipe3 *phy)
 		ret = clk_prepare_enable(phy->div_clk);
 		if (ret) {
 			dev_err(phy->dev, "Failed to enable div_clk %d\n", ret);
-			goto err3;
+			goto disable_wkupclk;
 		}
 	}
 
-	phy->enabled = true;
-	spin_unlock_irqrestore(&phy->lock, flags);
 	return 0;
 
-err3:
+disable_wkupclk:
 	if (!IS_ERR(phy->wkupclk))
 		clk_disable_unprepare(phy->wkupclk);
 
-err2:
+disable_refclk:
 	if (!IS_ERR(phy->refclk))
 		clk_disable_unprepare(phy->refclk);
 
-	ti_pipe3_disable_refclk(phy);
-err1:
-	spin_unlock_irqrestore(&phy->lock, flags);
 	return ret;
 }
 
 static void ti_pipe3_disable_clocks(struct ti_pipe3 *phy)
 {
-	unsigned long flags;
-
-	spin_lock_irqsave(&phy->lock, flags);
-	if (!phy->enabled) {
-		spin_unlock_irqrestore(&phy->lock, flags);
-		return;
-	}
-
 	if (!IS_ERR(phy->wkupclk))
 		clk_disable_unprepare(phy->wkupclk);
-	/* Don't disable refclk for SATA PHY due to Errata i783 */
-	if (!of_device_is_compatible(phy->dev->of_node, "ti,phy-pipe3-sata"))
-		ti_pipe3_disable_refclk(phy);
+	if (!IS_ERR(phy->refclk))
+		clk_disable_unprepare(phy->refclk);
 	if (!IS_ERR(phy->div_clk))
 		clk_disable_unprepare(phy->div_clk);
-	phy->enabled = false;
-	spin_unlock_irqrestore(&phy->lock, flags);
-}
-
-static int ti_pipe3_runtime_suspend(struct device *dev)
-{
-	struct ti_pipe3	*phy = dev_get_drvdata(dev);
-
-	ti_pipe3_disable_clocks(phy);
-	return 0;
 }
 
-static int ti_pipe3_runtime_resume(struct device *dev)
-{
-	struct ti_pipe3	*phy = dev_get_drvdata(dev);
-	int ret = 0;
-
-	ret = ti_pipe3_enable_clocks(phy);
-	return ret;
-}
-
-static int ti_pipe3_suspend(struct device *dev)
-{
-	struct ti_pipe3	*phy = dev_get_drvdata(dev);
-
-	ti_pipe3_disable_clocks(phy);
-	return 0;
-}
-
-static int ti_pipe3_resume(struct device *dev)
-{
-	struct ti_pipe3	*phy = dev_get_drvdata(dev);
-	int ret;
-
-	ret = ti_pipe3_enable_clocks(phy);
-	if (ret)
-		return ret;
-
-	pm_runtime_disable(dev);
-	pm_runtime_set_active(dev);
-	pm_runtime_enable(dev);
-	return 0;
-}
-#endif
-
-static const struct dev_pm_ops ti_pipe3_pm_ops = {
-	SET_RUNTIME_PM_OPS(ti_pipe3_runtime_suspend,
-			   ti_pipe3_runtime_resume, NULL)
-	SET_SYSTEM_SLEEP_PM_OPS(ti_pipe3_suspend, ti_pipe3_resume)
-};
-
 static const struct of_device_id ti_pipe3_id_table[] = {
 	{
 		.compatible = "ti,phy-usb3",
@@ -592,7 +503,6 @@ static struct platform_driver ti_pipe3_driver = {
 	.remove		= ti_pipe3_remove,
 	.driver		= {
 		.name	= "ti-pipe3",
-		.pm	= &ti_pipe3_pm_ops,
 		.of_match_table = ti_pipe3_id_table,
 	},
 };