usb: otg: OMAP4430: Save/restore the context

Add the context save/restore for the control module register
used for OMAP4430 musb with UTMI embedded PHY interface.

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>

1 files changed, 7 insertions, 0 deletions

diff --git a/arch/arm/mach-omap2/omap_phy_internal.c b/arch/arm/mach-omap2/omap_phy_internal.c
index 3ce675899fce..ebe33df708bd 100644
--- a/arch/arm/mach-omap2/omap_phy_internal.c
+++ b/arch/arm/mach-omap2/omap_phy_internal.c
@@ -43,6 +43,7 @@
 
 static struct clk *phyclk, *clk48m, *clk32k;
 static void __iomem *ctrl_base;
+static int usbotghs_control;
 
 int omap4430_phy_init(struct device *dev)
 {
@@ -129,6 +130,9 @@ int omap4430_phy_suspend(struct device *dev, int suspend)
                 omap4430_phy_set_clk(dev, 0);
                 /* Power down the phy */
                 __raw_writel(PHY_PD, ctrl_base + CONTROL_DEV_CONF);
+
+                /* save the context */
+                usbotghs_control = __raw_readl(ctrl_base + USBOTGHS_CONTROL);
         } else {
                 /* Enable the internel phy clcoks */
                 omap4430_phy_set_clk(dev, 1);
@@ -137,6 +141,9 @@ int omap4430_phy_suspend(struct device *dev, int suspend)
                         __raw_writel(~PHY_PD, ctrl_base + CONTROL_DEV_CONF);
                         mdelay(200);
                 }
+
+                /* restore the context */
+                __raw_writel(usbotghs_control, ctrl_base + USBOTGHS_CONTROL);
         }
 
         return 0;