Patchwork [01/19] mxc_udc: add workaround for ENGcm09152 for i.MX25

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Submitter Eric Benard
Date Dec. 13, 2011, 6:31 a.m.
Message ID <1323757911-25217-1-git-send-email-eric@eukrea.com>
Download mbox | patch
Permalink /patch/131002/
State Not Applicable
Headers show

Comments

Eric Benard - Dec. 13, 2011, 6:31 a.m.
this patch gives the possibility to workaround bug ENGcm09152
on i.MX25 when the hardware workaround is also implemented on
the board.
It covers the workaround described on page 42 of the following Errata :
http://cache.freescale.com/files/dsp/doc/errata/IMX25CE.pdf

Signed-off-by: Eric Bénard <eric@eukrea.com>
Cc: Sascha Hauer <kernel@pengutronix.de>
Cc: Greg Kroah-Hartman <gregkh@suse.de>
Cc: Li Yang <leoli@freescale.com>
---
 drivers/usb/gadget/fsl_mxc_udc.c |   22 +++++++++++++---------
 1 files changed, 13 insertions(+), 9 deletions(-)
Sascha Hauer - Dec. 13, 2011, 10:17 a.m.
Hi Eric,

To make the handling of your patches easier, please

- send a cover letter for multiple patches
- separate them at least by fixes and features
- if possible, do not send patches aimed at multiple
  maintainers in a single series.

I picked every patch looking like a fix for now myself,
but please remember next time. I'll have a look at the non-fix
patches later.

Sascha
Wolfram Sang - Dec. 13, 2011, 10:18 a.m.
On Tue, Dec 13, 2011 at 07:31:33AM +0100, Eric Bénard wrote:
> this patch gives the possibility to workaround bug ENGcm09152
> on i.MX25 when the hardware workaround is also implemented on
> the board.
> It covers the workaround described on page 42 of the following Errata :
> http://cache.freescale.com/files/dsp/doc/errata/IMX25CE.pdf

Nit: The title of the ENG would help reviewing, like it is preferred to
cite patch titles when mentioning the commit-id.

Patch

diff --git a/drivers/usb/gadget/fsl_mxc_udc.c b/drivers/usb/gadget/fsl_mxc_udc.c
index dcbc0a2..4aff05d 100644
--- a/drivers/usb/gadget/fsl_mxc_udc.c
+++ b/drivers/usb/gadget/fsl_mxc_udc.c
@@ -23,7 +23,7 @@ 
 static struct clk *mxc_ahb_clk;
 static struct clk *mxc_usb_clk;
 
-/* workaround ENGcm09152 for i.MX35 */
+/* workaround ENGcm09152 for i.MX25/35 */
 #define USBPHYCTRL_OTGBASE_OFFSET	0x608
 #define USBPHYCTRL_EVDO			(1 << 23)
 
@@ -89,16 +89,20 @@  eenahb:
 void fsl_udc_clk_finalize(struct platform_device *pdev)
 {
 	struct fsl_usb2_platform_data *pdata = pdev->dev.platform_data;
-	if (cpu_is_mx35()) {
+	if (cpu_is_mx25() || cpu_is_mx35()) {
 		unsigned int v;
-
-		/* workaround ENGcm09152 for i.MX35 */
+		void __iomem *otgbase;
+		if (cpu_is_mx25())
+			otgbase = MX25_IO_ADDRESS(MX25_USB_BASE_ADDR +
+					USBPHYCTRL_OTGBASE_OFFSET);
+		else if (cpu_is_mx35())
+			otgbase = MX35_IO_ADDRESS(MX35_USB_BASE_ADDR +
+					USBPHYCTRL_OTGBASE_OFFSET);
+
+		/* workaround ENGcm09152 for i.MX25/35 */
 		if (pdata->workaround & FLS_USB2_WORKAROUND_ENGCM09152) {
-			v = readl(MX35_IO_ADDRESS(MX35_USB_BASE_ADDR +
-					USBPHYCTRL_OTGBASE_OFFSET));
-			writel(v | USBPHYCTRL_EVDO,
-				MX35_IO_ADDRESS(MX35_USB_BASE_ADDR +
-					USBPHYCTRL_OTGBASE_OFFSET));
+			v = readl(otgbase);
+			writel(v | USBPHYCTRL_EVDO, otgbase);
 		}
 	}