usb: otg: OMAP4430: Introducing suspend function for power management

Introduced the suspend/resume function for the OMAP4430 internal PHY.
This will be used by the twl6030-usb transceiver driver.
Moved the clock enable/disable function calls and power on/off of the PHY
code from power on/off functions to suspend/resume function.

Pass the suspend function through board data for OMAP4430sdp and OMAP4panda.
This will be used by the twl6030-usb transceiver driver.

Signed-off-by: Hema HK <hemahk@ti.com>
Cc: Tony Lindgren <tony@atomide.com>
Cc: Paul Walmsley <paul@pwsan.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>

arch/arm/mach-omap2/board-4430sdp.c

@@ -272,6 +272,7 @@ static struct twl4030_usb_data omap4_usbphy_data = {
 	.phy_exit	= omap4430_phy_exit,
 	.phy_power	= omap4430_phy_power,
 	.phy_set_clock	= omap4430_phy_set_clk,
+	.phy_suspend	= omap4430_phy_suspend,
 };
 
 static struct omap2_hsmmc_info mmc[] = {

arch/arm/mach-omap2/board-omap4panda.c

@@ -153,6 +153,7 @@ static struct twl4030_usb_data omap4_usbphy_data = {
 	.phy_exit	= omap4430_phy_exit,
 	.phy_power	= omap4430_phy_power,
 	.phy_set_clock	= omap4430_phy_set_clk,
+	.phy_suspend	= omap4430_phy_suspend,
 };
 
 static struct omap2_hsmmc_info mmc[] = {

arch/arm/mach-omap2/omap_phy_internal.c

@@ -103,13 +103,6 @@ int omap4430_phy_set_clk(struct device *dev, int on)
 int omap4430_phy_power(struct device *dev, int ID, int on)
 {
 	if (on) {
-		/* enabled the clocks */
-		omap4430_phy_set_clk(dev, 1);
-		/* power on the phy */
-		if (__raw_readl(ctrl_base + CONTROL_DEV_CONF) & PHY_PD) {
-			__raw_writel(~PHY_PD, ctrl_base + CONTROL_DEV_CONF);
-			mdelay(200);
-		}
 		if (ID)
 			/* enable VBUS valid, IDDIG groung */
 			__raw_writel(AVALID | VBUSVALID, ctrl_base +
@@ -125,10 +118,25 @@ int omap4430_phy_power(struct device *dev, int ID, int on)
 		/* Enable session END and IDIG to high impedence. */
 		__raw_writel(SESSEND | IDDIG, ctrl_base +
 					USBOTGHS_CONTROL);
+	}
+	return 0;
+}
+
+int omap4430_phy_suspend(struct device *dev, int suspend)
+{
+	if (suspend) {
 		/* Disable the clocks */
 		omap4430_phy_set_clk(dev, 0);
 		/* Power down the phy */
 		__raw_writel(PHY_PD, ctrl_base + CONTROL_DEV_CONF);
+	} else {
+		/* Enable the internel phy clcoks */
+		omap4430_phy_set_clk(dev, 1);
+		/* power on the phy */
+		if (__raw_readl(ctrl_base + CONTROL_DEV_CONF) & PHY_PD) {
+			__raw_writel(~PHY_PD, ctrl_base + CONTROL_DEV_CONF);
+			mdelay(200);
+		}
 	}
 
 	return 0;

arch/arm/plat-omap/include/plat/usb.h

@@ -88,6 +88,7 @@ extern int omap4430_phy_power(struct device *dev, int ID, int on);
 extern int omap4430_phy_set_clk(struct device *dev, int on);
 extern int omap4430_phy_init(struct device *dev);
 extern int omap4430_phy_exit(struct device *dev);
+extern int omap4430_phy_suspend(struct device *dev, int suspend);
 
 #endif