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Commit bf541715 authored by David Daney's avatar David Daney Committed by Greg Kroah-Hartman
Browse files

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: default avatarDavid Daney <ddaney@caviumnetworks.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>
parent f5ced997

drivers/usb/host/octeon2-common.c

+3 −1
Original line number Diff line number Diff line
@@ -176,8 +176,10 @@ void octeon2_usb_clocks_start(void) 
	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);

	}