From 72cfaf05bf3442477aa2ee5b4835340a30281cde Mon Sep 17 00:00:00 2001
From: Alex1 Kao <alex1_kao@pegatron.corp-partner.google.com>
Date: Fri, 16 Jul 2021 19:00:10 +0800
Subject: mb/google/dedede/var/pirika: Configure I2C times to 380-400 kHz for
 touchpad

Configure I2C high / low time in the device tree to ensure I2C
CLK runs accurately between 380 kHz and 400 kHz.

Audio codec:388.91 kHz
Touchpad:394.48 kHz

BUG=b:193864546
BRANCH=dedede
TEST=Build and check after tuning I2C clock is between 380 kHz and 400 kHz

Signed-off-by: Alex1 Kao <alex1_kao@pegatron.corp-partner.google.com>
Change-Id: Ia57c90ead44ceb0990878dc0566e595bae5a9099
Reviewed-on: https://review.coreboot.org/c/coreboot/+/56383
Reviewed-by: Kirk Wang <kirk_wang@pegatron.corp-partner.google.com>
Reviewed-by: Karthik Ramasubramanian <kramasub@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
---
 .../google/dedede/variants/pirika/overridetree.cb  | 24 +++++++++++-----------
 1 file changed, 12 insertions(+), 12 deletions(-)

diff --git a/src/mainboard/google/dedede/variants/pirika/overridetree.cb b/src/mainboard/google/dedede/variants/pirika/overridetree.cb
index df3fead3d9..fbbea1deb2 100644
--- a/src/mainboard/google/dedede/variants/pirika/overridetree.cb
+++ b/src/mainboard/google/dedede/variants/pirika/overridetree.cb
@@ -9,9 +9,6 @@ chip soc/intel/jasperlake
 	#|                   | for TPM communication     |
 	#|                   | before memory is up       |
 	#| I2C0              | Trackpad                  |
-	#| I2C1              | Digitizer                 |
-	#| I2C2              | Touchscreen               |
-	#| I2C3              | Camera                    |
 	#| I2C4              | Audio                     |
 	#+-------------------+---------------------------+
 	register "common_soc_config" = "{
@@ -21,21 +18,24 @@ chip soc/intel/jasperlake
 		},
 		.i2c[0] = {
 			.speed = I2C_SPEED_FAST,
-		},
-		.i2c[1] = {
-			.speed = I2C_SPEED_FAST,
-		},
-		.i2c[2] = {
-			.speed = I2C_SPEED_FAST,
-		},
-		.i2c[3] = {
-			.speed = I2C_SPEED_FAST,
+			.rise_time_ns = 260,
+			.fall_time_ns = 50,
 		},
 		.i2c[4] = {
 			.speed = I2C_SPEED_FAST,
+			.rise_time_ns = 260,
+			.fall_time_ns = 50,
 		},
 	}"
 
+	register "SerialIoI2cMode" = "{
+		[PchSerialIoIndexI2C0]  = PchSerialIoPci,
+		[PchSerialIoIndexI2C1]  = PchSerialIoDisabled,
+		[PchSerialIoIndexI2C2]  = PchSerialIoDisabled,
+		[PchSerialIoIndexI2C3]  = PchSerialIoDisabled,
+		[PchSerialIoIndexI2C4]  = PchSerialIoPci,
+	}"
+
 	# USB Port Configuration
 	register "usb2_ports[2]" = "{
 		.enable = 1,
-- 
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