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-rw-r--r--src/mainboard/google/zork/variants/morphius/overridetree.cb13
1 files changed, 13 insertions, 0 deletions
diff --git a/src/mainboard/google/zork/variants/morphius/overridetree.cb b/src/mainboard/google/zork/variants/morphius/overridetree.cb
index ecadb072c1..66b371be04 100644
--- a/src/mainboard/google/zork/variants/morphius/overridetree.cb
+++ b/src/mainboard/google/zork/variants/morphius/overridetree.cb
@@ -35,6 +35,19 @@ chip soc/amd/picasso
.ports.xhci0_port2 = 1, /* Left USB3A port 2 */
}"
+ # USB 2.0 strength
+ register "usb_2_port_tune_params[3]" = "{
+ .com_pds_tune = 0x07,
+ .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,