From 8269692517808d44d0b9c8deecd9e9182892726f Mon Sep 17 00:00:00 2001
From: Johnny Li <johnny_li@wistron.corp-partner.google.com>
Date: Thu, 8 Oct 2020 09:11:21 +0800
Subject: [PATCH] mb/google/volteer/variants/volteer2: I2C5 trackpad bus freq
 400 kHz

The current I2C5 bus frequency is 367 kHZ, which does not meet the spec.
This change updates scl_lcnt, scl_hcnt, scl_hcnt value for I2C5 to bring
the bus frequency closer to 400kHz.

BUG=b:153588771
TEST=Verified that I2C5 frequency is between 389-396kHz.

Signed-off-by: Johnny Li <johnny_li@wistron.corp-partner.google.com>
Change-Id: If0803a74ba9071acf15486ce4038261c1681a92f
Reviewed-on: https://review.coreboot.org/c/coreboot/+/46142
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Tim Wawrzynczak <twawrzynczak@chromium.org>
---
 .../volteer/variants/volteer2/overridetree.cb | 38 +++++++++++++++++++
 1 file changed, 38 insertions(+)

diff --git a/src/mainboard/google/volteer/variants/volteer2/overridetree.cb b/src/mainboard/google/volteer/variants/volteer2/overridetree.cb
index 2db1f087ef..3f666ac148 100644
--- a/src/mainboard/google/volteer/variants/volteer2/overridetree.cb
+++ b/src/mainboard/google/volteer/variants/volteer2/overridetree.cb
@@ -4,6 +4,44 @@ chip soc/intel/tigerlake
 	register "IomTypeCPortPadCfg[1]" = "0x090E000D"
 	register "DdiPort1Hpd" = "0"
 	register "DdiPort2Hpd" = "0"
+	#+-------------------+---------------------------+
+	#| Field             |  Value                    |
+	#+-------------------+---------------------------+
+	#| chipset_lockdown  | CHIPSET_LOCKDOWN_COREBOOT |
+	#| GSPI0             | cr50 TPM. Early init is   |
+	#|                   | required to set up a BAR  |
+	#|                   | for TPM communication     |
+	#|                   | before memory is up       |
+	#| GSPI1             | Fingerprint MCU           |
+	#| I2C0              | Audio                     |
+	#| I2C1              | Touchscreen               |
+	#| I2C2              | WLAN, SAR0                |
+	#| I2C3              | Camera, SAR1              |
+	#| I2C5              | Trackpad                  |
+	#+-------------------+---------------------------+
+	register "common_soc_config" = "{
+		.i2c[0] = {
+			.speed = I2C_SPEED_FAST,
+		},
+		.i2c[1] = {
+			.speed = I2C_SPEED_FAST,
+		},
+		.i2c[2] = {
+			.speed = I2C_SPEED_FAST,
+		},
+		.i2c[3] = {
+			.speed = I2C_SPEED_FAST,
+		},
+		.i2c[5] = {
+			.speed = I2C_SPEED_FAST,
+			.speed_config[0] = {
+				.speed = I2C_SPEED_FAST,
+				.scl_lcnt = 163,
+				.scl_hcnt = 75,
+				.sda_hold = 36,
+			},
+		},
+	}"
 
 	register "HybridStorageMode" = "1"