Kevin Chiu has uploaded this change for review.

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

Enhance USB 2.0 C0/C1 A0/A1 HS DC Voltage Level.

BUG=b:166398726
BRANCH=zork
TEST=1. emerge-zork coreboot
     2. check U2 register is set correctly.

Change-Id: I69d942605c6d43ece0d71f67df3a5e00b998219b
Signed-off-by: Kevin Chiu <kevin.chiu@quantatw.com>
---
M src/mainboard/google/zork/variants/berknip/overridetree.cb
1 file changed, 48 insertions(+), 0 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/45/46545/1

diff --git a/src/mainboard/google/zork/variants/berknip/overridetree.cb b/src/mainboard/google/zork/variants/berknip/overridetree.cb
index 674d557..e294168 100644
--- a/src/mainboard/google/zork/variants/berknip/overridetree.cb
+++ b/src/mainboard/google/zork/variants/berknip/overridetree.cb
@@ -21,6 +21,54 @@
 	register "telemetry_vddcr_soc_offset" = "0"
 
 	# End : OPN Performance Configuration
+	#USB 2.0 strength
+	register "usb_2_port_tune_params[0]" = "{
+		.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,
+	}"
+
+	register "usb_2_port_tune_params[1]" = "{
+		.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,
+	}"
+
+	register "usb_2_port_tune_params[2]" = "{
+		.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,
+	}"
+
+	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]" = "{

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