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mxc_udc: add workaround for ENGcm09152 for i.MX35

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this patch gives the possibility to workaround bug ENGcm09152
on i.MX35 when the hardware workaround is also implemented on
the board.
It covers the workaround described on page 25 of the following Errata :
http://cache.freescale.com/files/dsp/doc/errata/IMX35CE.pdf

Signed-off-by: Eric Bénard <eric@eukrea.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Eric Bénard
2010-10-15 14:30:58 +02:00
committed by Greg Kroah-Hartman
parent 0f266abd70
commit 69cb1ec4ce
3 changed files with 19 additions and 0 deletions
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drivers/usb/gadget/fsl_mxc_udc.c
+15
View File
@@ -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) {