diff options
| author |   Nikhil Badola <nikhil.badola@freescale.com> | 2015-06-15 15:47:29 +0530 |
|---|---|---|
| committer |   Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2015-07-22 16:37:32 -0700 |
| commit | 523f1dec58408b36e7683a3d61a0286eed1fc1c8 (patch) | |
| tree | b618dd10b8480855d0887a6ed865b91c6a391de2 /drivers/usb/host/fsl-mph-dr-of.c | |
| parent | drivers:usb:fsl: Replace macros with enumerated type (diff) | |
| download | linux-dev-523f1dec58408b36e7683a3d61a0286eed1fc1c8.tar.xz linux-dev-523f1dec58408b36e7683a3d61a0286eed1fc1c8.zip | |
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>
Diffstat (limited to 'drivers/usb/host/fsl-mph-dr-of.c')
| -rw-r--r-- | drivers/usb/host/fsl-mph-dr-of.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/usb/host/fsl-mph-dr-of.c b/drivers/usb/host/fsl-mph-dr-of.c index 219595637cb1..17e1e6b7a035 100644 --- a/drivers/usb/host/fsl-mph-dr-of.c +++ b/drivers/usb/host/fsl-mph-dr-of.c @@ -214,6 +214,12 @@ static int fsl_usb2_mph_dr_of_probe(struct platform_device *ofdev) 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"); |