drivers: usb :fsl: Implement Workaround for USB Erratum A007792
USB controller version-2.5 requires to enable internal UTMI
phy and program PTS field in PORTSC register before asserting
controller reset. This is must for successful resetting of the
controller and subsequent enumeration of usb devices
Signed-off-by: Nikhil Badola <nikhil.badola@freescale.com>
Signed-off-by: Suresh Gupta <suresh.gupta@freescale.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/drivers/usb/host/fsl-mph-dr-of.c b/drivers/usb/host/fsl-mph-dr-of.c
index 2195956..17e1e6b 100644
--- a/drivers/usb/host/fsl-mph-dr-of.c
+++ b/drivers/usb/host/fsl-mph-dr-of.c
@@ -214,6 +214,12 @@
pdata->phy_mode = determine_usb_phy(prop);
pdata->controller_ver = usb_get_ver_info(np);
+ /* Activate Erratum by reading property in device tree */
+ if (of_get_property(np, "fsl,usb-erratum-a007792", NULL))
+ pdata->has_fsl_erratum_a007792 = 1;
+ else
+ pdata->has_fsl_erratum_a007792 = 0;
+
if (pdata->have_sysif_regs) {
if (pdata->controller_ver == FSL_USB_VER_NONE) {
dev_warn(&ofdev->dev, "Could not get controller version\n");