USB: PHY: tegra: get rid of instance number to differentiate legacy controller

Tegra20 USB has 3 PHY instances. Instance 0 is based on
legacy PHY interface and other two are standard interfaces.

As instance number was used to differentiate legacy from
standard interfaces, used DT param to get this info and
processed accordingly.
Signed-off-by: Venu Byravarasu <vbyravarasu@nvidia.com>
Acked-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Stephen Warren <swarren@nvidia.com>

drivers/usb/phy/tegra_usb_phy.c

@@ -24,6 +24,7 @@
 #include <linux/platform_device.h>
 #include <linux/io.h>
 #include <linux/gpio.h>
+#include <linux/of.h>
 #include <linux/of_gpio.h>
 #include <linux/usb/otg.h>
 #include <linux/usb/ulpi.h>
@@ -221,7 +222,7 @@ static int utmip_pad_open(struct tegra_usb_phy *phy)
 		return PTR_ERR(phy->pad_clk);
 	}
 
-	if (phy->instance == 0) {
+	if (phy->is_legacy_phy) {
 		phy->pad_regs = phy->regs;
 	} else {
 		phy->pad_regs = ioremap(TEGRA_USB_BASE, TEGRA_USB_SIZE);
@@ -236,7 +237,7 @@ static int utmip_pad_open(struct tegra_usb_phy *phy)
 
 static void utmip_pad_close(struct tegra_usb_phy *phy)
 {
-	if (phy->instance != 0)
+	if (!phy->is_legacy_phy)
 		iounmap(phy->pad_regs);
 	clk_put(phy->pad_clk);
 }
@@ -305,7 +306,7 @@ static void utmi_phy_clk_disable(struct tegra_usb_phy *phy)
 	unsigned long val;
 	void __iomem *base = phy->regs;
 
-	if (phy->instance == 0) {
+	if (phy->is_legacy_phy) {
 		val = readl(base + USB_SUSP_CTRL);
 		val |= USB_SUSP_SET;
 		writel(val, base + USB_SUSP_CTRL);
@@ -315,9 +316,7 @@ static void utmi_phy_clk_disable(struct tegra_usb_phy *phy)
 		val = readl(base + USB_SUSP_CTRL);
 		val &= ~USB_SUSP_SET;
 		writel(val, base + USB_SUSP_CTRL);
-	}
-
-	if (phy->instance == 2) {
+	} else {
 		val = readl(base + USB_PORTSC1);
 		val |= USB_PORTSC1_PHCD;
 		writel(val, base + USB_PORTSC1);
@@ -332,7 +331,7 @@ static void utmi_phy_clk_enable(struct tegra_usb_phy *phy)
 	unsigned long val;
 	void __iomem *base = phy->regs;
 
-	if (phy->instance == 0) {
+	if (phy->is_legacy_phy) {
 		val = readl(base + USB_SUSP_CTRL);
 		val |= USB_SUSP_CLR;
 		writel(val, base + USB_SUSP_CTRL);
@@ -342,9 +341,7 @@ static void utmi_phy_clk_enable(struct tegra_usb_phy *phy)
 		val = readl(base + USB_SUSP_CTRL);
 		val &= ~USB_SUSP_CLR;
 		writel(val, base + USB_SUSP_CTRL);
-	}
-
-	if (phy->instance == 2) {
+	} else {
 		val = readl(base + USB_PORTSC1);
 		val &= ~USB_PORTSC1_PHCD;
 		writel(val, base + USB_PORTSC1);
@@ -365,7 +362,7 @@ static int utmi_phy_power_on(struct tegra_usb_phy *phy)
 	val |= UTMIP_RESET;
 	writel(val, base + USB_SUSP_CTRL);
 
-	if (phy->instance == 0) {
+	if (phy->is_legacy_phy) {
 		val = readl(base + USB1_LEGACY_CTRL);
 		val |= USB1_NO_LEGACY_MODE;
 		writel(val, base + USB1_LEGACY_CTRL);
@@ -440,16 +437,14 @@ static int utmi_phy_power_on(struct tegra_usb_phy *phy)
 	val |= UTMIP_BIAS_PDTRK_COUNT(0x5);
 	writel(val, base + UTMIP_BIAS_CFG1);
 
-	if (phy->instance == 0) {
+	if (phy->is_legacy_phy) {
 		val = readl(base + UTMIP_SPARE_CFG0);
 		if (phy->mode == TEGRA_USB_PHY_MODE_DEVICE)
 			val &= ~FUSE_SETUP_SEL;
 		else
 			val |= FUSE_SETUP_SEL;
 		writel(val, base + UTMIP_SPARE_CFG0);
-	}
-
-	if (phy->instance == 2) {
+	} else {
 		val = readl(base + USB_SUSP_CTRL);
 		val |= UTMIP_PHY_ENABLE;
 		writel(val, base + USB_SUSP_CTRL);
@@ -459,7 +454,7 @@ static int utmi_phy_power_on(struct tegra_usb_phy *phy)
 	val &= ~UTMIP_RESET;
 	writel(val, base + USB_SUSP_CTRL);
 
-	if (phy->instance == 0) {
+	if (phy->is_legacy_phy) {
 		val = readl(base + USB1_LEGACY_CTRL);
 		val &= ~USB1_VBUS_SENSE_CTL_MASK;
 		val |= USB1_VBUS_SENSE_CTL_A_SESS_VLD;
@@ -472,7 +467,7 @@ static int utmi_phy_power_on(struct tegra_usb_phy *phy)
 
 	utmi_phy_clk_enable(phy);
 
-	if (phy->instance == 2) {
+	if (!phy->is_legacy_phy) {
 		val = readl(base + USB_PORTSC1);
 		val &= ~USB_PORTSC1_PTS(~0);
 		writel(val, base + USB_PORTSC1);
@@ -739,6 +734,7 @@ struct tegra_usb_phy *tegra_usb_phy_open(struct device *dev, int instance,
 	unsigned long parent_rate;
 	int i;
 	int err;
+	struct device_node *np = dev->of_node;
 
 	phy = kzalloc(sizeof(struct tegra_usb_phy), GFP_KERNEL);
 	if (!phy)
@@ -749,6 +745,8 @@ struct tegra_usb_phy *tegra_usb_phy_open(struct device *dev, int instance,
 	phy->config = config;
 	phy->mode = phy_mode;
 	phy->dev = dev;
+	phy->is_legacy_phy =
+		of_property_read_bool(np, "nvidia,has-legacy-mode");
 
 	if (!phy->config) {
 		if (phy_is_ulpi(phy)) {

include/linux/usb/tegra_usb_phy.h

@@ -59,6 +59,7 @@ struct tegra_usb_phy {
 	struct usb_phy *ulpi;
 	struct usb_phy u_phy;
 	struct device *dev;
+	bool is_legacy_phy;
 };
 
 struct tegra_usb_phy *tegra_usb_phy_open(struct device *dev, int instance,