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>

4 files changed, 18 insertions, 7 deletions

diff --git a/arch/arm/mach-omap2/board-4430sdp.c b/arch/arm/mach-omap2/board-4430sdp.c
index 07d1b20b1148..9cf8e333255f 100644
--- a/arch/arm/mach-omap2/board-4430sdp.c
+++ b/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[] = {
diff --git a/arch/arm/mach-omap2/board-omap4panda.c b/arch/arm/mach-omap2/board-omap4panda.c
index e944025d5ef8..77748f813667 100644
--- a/arch/arm/mach-omap2/board-omap4panda.c
+++ b/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[] = {
diff --git a/arch/arm/mach-omap2/omap_phy_internal.c b/arch/arm/mach-omap2/omap_phy_internal.c
index 745252c60e32..3ce675899fce 100644
--- a/arch/arm/mach-omap2/omap_phy_internal.c
+++ b/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;
diff --git a/arch/arm/plat-omap/include/plat/usb.h b/arch/arm/plat-omap/include/plat/usb.h
index 450a332f1009..f888e0e57dc8 100644
--- a/arch/arm/plat-omap/include/plat/usb.h
+++ b/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