Change in coreboot[master]: mb/google/dedede/var/storo: Modify I2C times for touchpad

[zanxi chen (Code Review)]

zanxi chen has uploaded this change for review. ( https://review.coreboot.org/c/coreboot/+/55109 )


Change subject: mb/google/dedede/var/storo: Modify I2C times for touchpad
......................................................................

mb/google/dedede/var/storo: Modify I2C times for touchpad

Configure I2C rise/fall time in device tree to ensure I2C
CLK runs accurately (380<frequency<400 kHz).

Measured touchpad I2C frequency is 394 kHz

BUG=b:189740533
BRANCH=dedede
TEST=Build bios and make sure frequency meets specification.

Change-Id: Ibc0504a5be6fe9237b8b30783c659a761d10561a
Signed-off-by: Zanxi Chen <[e-mail]>
---
M src/mainboard/google/dedede/variants/storo/overridetree.cb
1 file changed, 2 insertions(+), 2 deletions(-)



  git pull ssh://review.coreboot.org:29418/coreboot refs/changes/09/55109/1

diff --git a/src/mainboard/google/dedede/variants/storo/overridetree.cb b/src/mainboard/google/dedede/variants/storo/overridetree.cb
index 40b17df..6336192 100644
--- a/src/mainboard/google/dedede/variants/storo/overridetree.cb
+++ b/src/mainboard/google/dedede/variants/storo/overridetree.cb
@@ -26,8 +26,8 @@
 		},
 		.i2c[0] = {
 			.speed = I2C_SPEED_FAST,
-			.rise_time_ns = 125,
-			.fall_time_ns = 19,
+			.rise_time_ns = 260,
+			.fall_time_ns = 50,
 		},
 		.i2c[1] = {
 			.speed = I2C_SPEED_FAST,

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Gerrit-Project: coreboot
Gerrit-Branch: master
Gerrit-Change-Id: Ibc0504a5be6fe9237b8b30783c659a761d10561a
Gerrit-Change-Number: 55109
Gerrit-PatchSet: 1
Gerrit-Owner: zanxi chen <[e-mail]>
Gerrit-MessageType: newchange