From bf5417152154038bbae429e2357731b1dad03328 Mon Sep 17 00:00:00 2001 From: David Daney Date: Wed, 27 Apr 2011 10:54:21 -0700 Subject: [PATCH] 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 Signed-off-by: Greg Kroah-Hartman --- drivers/usb/host/octeon2-common.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) 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); } -- 2.20.1