[coreboot-gerrit] Change in coreboot[master]: mb/google/dedede/var/corori: Configure I2C times for Touchpad

[Ian Feng (Code Review)]

Ian Feng has uploaded this change for review. ( https://review.coreboot.org/c/coreboot/+/58238 )

Change subject: mb/google/dedede/var/corori: Configure I2C times for Touchpad
......................................................................

mb/google/dedede/var/corori: Configure I2C times for Touchpad

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

Measured I2C frequency just as below after tuning:
Touch Pad CLK: 389.2 KHz

BUG=b:202787528
TEST=Build and check after tuning I2C clock is between 380 kHz and 400 kHz

Change-Id: I0f9d062fc611de0062a39849aee1174268391682
---
M src/mainboard/google/dedede/variants/corori/overridetree.cb
1 file changed, 2 insertions(+), 0 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/38/58238/1

diff --git a/src/mainboard/google/dedede/variants/corori/overridetree.cb b/src/mainboard/google/dedede/variants/corori/overridetree.cb
index d322000..f7899a6 100644
--- a/src/mainboard/google/dedede/variants/corori/overridetree.cb
+++ b/src/mainboard/google/dedede/variants/corori/overridetree.cb
@@ -39,6 +39,8 @@
    register "common_soc_config" = "{
    	.i2c[0] = {
    		.speed = I2C_SPEED_FAST,
+			.rise_time_ns = 255,
+			.fall_time_ns = 14,
    	},
    	.i2c[4] = {
    		.speed = I2C_SPEED_FAST,