Kevin Chiu has uploaded this change for review.

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mb/google/zork: update USB 2.0 controller Lane Parameter for morphius

Enhance USB 2.0 HS DC Voltage Level

BUG=b:162614573
BRANCH=zork
TEST=emerge-zork coreboot

Signed-off-by: Kevin Chiu <kevin.chiu@quantatw.com>
Change-Id: I278cc0aaddbc9fce595bf57ca69ee8abfc9f5659
---
M src/mainboard/google/zork/variants/morphius/overridetree.cb
1 file changed, 13 insertions(+), 0 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/37/46537/1

diff --git a/src/mainboard/google/zork/variants/morphius/overridetree.cb b/src/mainboard/google/zork/variants/morphius/overridetree.cb
index ecadb07..62b08fb 100644
--- a/src/mainboard/google/zork/variants/morphius/overridetree.cb
+++ b/src/mainboard/google/zork/variants/morphius/overridetree.cb
@@ -35,6 +35,19 @@
 		.ports.xhci0_port2 = 1, /* Left USB3A port 2 */
 	}"
 
+	#USB 2.0 strength
+	register "usb_2_port_tune_params[3]" = "{
+		.com_pds_tune = 0x03,
+		.sq_rx_tune = 0x3,
+		.tx_fsls_tune = 0x3,
+		.tx_pre_emp_amp_tune = 0x03,
+		.tx_pre_emp_pulse_tune = 0x0,
+		.tx_rise_tune = 0x1,
+		.rx_vref_tune = 0xf,
+		.tx_hsxv_tune = 0x3,
+		.tx_res_tune = 0x01,
+	}"
+
 	# Enable I2C2 for trackpad, touchscreen, pen at 400kHz
 	register "i2c[2]" = "{
 		.speed = I2C_SPEED_FAST,

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