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>

diff --git a/arch/arm/mach-omap2/omap_phy_internal.c b/arch/arm/mach-omap2/omap_phy_internal.c
index 3ce675899fce19ddad4707ec5ae9c6b63fc6db52..ebe33df708bd85a6c2e9e47b7374d3f3d7f59437 100644 (file)
--- 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;