usb: octeon2-common.c: Configure ports for proper electrical characteristics.

Additional PHY tuning is needed to obtain compliant 'eye' diagram
electrical characteristics.

Signed-off-by: David Daney <ddaney@caviumnetworks.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 3 insertions, 1 deletions

diff --git a/drivers/usb/host/octeon2-common.c b/drivers/usb/host/octeon2-common.c
index 5a0feed03561..aef6364d6314 100644
--- a/drivers/usb/host/octeon2-common.c
+++ b/drivers/usb/host/octeon2-common.c
@@ -176,8 +176,10 @@ end_clock:
         for (i = 0; i <= 1; i++) {
                 port_ctl_status.u64 =
                         cvmx_read_csr(CVMX_UCTLX_UPHY_PORTX_CTL_STATUS(i, 0));
-                /* Set txvreftune to 15 to obtain complient 'eye' diagram. */
+                /* Set txvreftune to 15 to obtain compliant 'eye' diagram. */
                 port_ctl_status.s.txvreftune = 15;
+                port_ctl_status.s.txrisetune = 1;
+                port_ctl_status.s.txpreemphasistune = 1;
                 cvmx_write_csr(CVMX_UCTLX_UPHY_PORTX_CTL_STATUS(i, 0),
                                port_ctl_status.u64);
         }