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path: root/drivers/usb/gadget/fsl_mxc_udc.c
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Diffstat (limited to 'drivers/usb/gadget/fsl_mxc_udc.c')
-rw-r--r--drivers/usb/gadget/fsl_mxc_udc.c15
1 files changed, 15 insertions, 0 deletions
diff --git a/drivers/usb/gadget/fsl_mxc_udc.c b/drivers/usb/gadget/fsl_mxc_udc.c
index eafa6d2c5ed7..5bdbfe619853 100644
--- a/drivers/usb/gadget/fsl_mxc_udc.c
+++ b/drivers/usb/gadget/fsl_mxc_udc.c
@@ -22,6 +22,10 @@
static struct clk *mxc_ahb_clk;
static struct clk *mxc_usb_clk;
+/* workaround ENGcm09152 for i.MX35 */
+#define USBPHYCTRL_OTGBASE_OFFSET 0x608
+#define USBPHYCTRL_EVDO (1 << 23)
+
int fsl_udc_clk_init(struct platform_device *pdev)
{
struct fsl_usb2_platform_data *pdata;
@@ -84,6 +88,17 @@ eenahb:
void fsl_udc_clk_finalize(struct platform_device *pdev)
{
struct fsl_usb2_platform_data *pdata = pdev->dev.platform_data;
+#if defined(CONFIG_ARCH_MX35)
+ unsigned int v;
+
+ /* workaround ENGcm09152 for i.MX35 */
+ if (pdata->workaround & FLS_USB2_WORKAROUND_ENGCM09152) {
+ v = readl(MX35_IO_ADDRESS(MX35_OTG_BASE_ADDR +
+ USBPHYCTRL_OTGBASE_OFFSET));
+ writel(v | USBPHYCTRL_EVDO, MX35_IO_ADDRESS(MX35_OTG_BASE_ADDR +
+ USBPHYCTRL_OTGBASE_OFFSET));
+ }
+#endif
/* ULPI transceivers don't need usbpll */
if (pdata->phy_mode == FSL_USB2_PHY_ULPI) {