diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/usb/host/ehci-fsl.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/drivers/usb/host/ehci-fsl.c b/drivers/usb/host/ehci-fsl.c index 2dca524..5fd618d 100644 --- a/drivers/usb/host/ehci-fsl.c +++ b/drivers/usb/host/ehci-fsl.c @@ -138,6 +138,16 @@ int ehci_hcd_init(int index, enum usb_init_type init, if (has_erratum_a007798()) set_txfifothresh(ehci, TXFIFOTHRESH); + if (has_erratum_a004477()) { + /* + * When reset is issued while any ULPI transaction is ongoing + * then it may result to corruption of ULPI Function Control + * Register which eventually causes phy clock to enter low + * power mode which stops the clock. Thus delay is required + * before reset to let ongoing ULPI transaction complete. + */ + udelay(1); + } return 0; } |