[coreboot-gerrit] Change in coreboot[master]: mb/google/octopus: STYLUS EMR PEN I2C bus 0 CLK frequency(401KHz)over...

Peichao Li (Code Review) gerrit at coreboot.org
Tue Oct 9 06:44:46 CEST 2018


Peichao Li has uploaded this change for review. ( https://review.coreboot.org/28973


Change subject: mb/google/octopus: STYLUS EMR PEN I2C bus 0 CLK frequency(401KHz)over spec(<400KHz)
......................................................................

mb/google/octopus: STYLUS EMR PEN I2C bus 0 CLK frequency(401KHz)over spec(<400KHz)

Need to tune I2C bus 0 clock frequency under the 400KHz

Bug=b:117297214
TEST=flash coreboot to the DUT and measure I2C bus 0 clock
frequency whether under 400KHz

Change-Id: I06d9d25f52d7f641d937de0d6b7df3d7a076fbf9
Signed-off-by: Peichao.Wang <peichao.wang at bitland.corp-partner.google.com>
---
M src/mainboard/google/octopus/variants/phaser/overridetree.cb
1 file changed, 2 insertions(+), 2 deletions(-)



  git pull ssh://review.coreboot.org:29418/coreboot refs/changes/73/28973/1

diff --git a/src/mainboard/google/octopus/variants/phaser/overridetree.cb b/src/mainboard/google/octopus/variants/phaser/overridetree.cb
index 2f6915e..3a208ea 100644
--- a/src/mainboard/google/octopus/variants/phaser/overridetree.cb
+++ b/src/mainboard/google/octopus/variants/phaser/overridetree.cb
@@ -20,8 +20,8 @@
 		},
 		.i2c[0] = {
 			.speed = I2C_SPEED_FAST,
-			.rise_time_ns = 152,
-			.fall_time_ns = 30,
+			.rise_time_ns = 66,
+			.fall_time_ns = 90,
 		},
 		.i2c[5] = {
 			.speed = I2C_SPEED_FAST,

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Gerrit-Project: coreboot
Gerrit-Branch: master
Gerrit-MessageType: newchange
Gerrit-Change-Id: I06d9d25f52d7f641d937de0d6b7df3d7a076fbf9
Gerrit-Change-Number: 28973
Gerrit-PatchSet: 1
Gerrit-Owner: Peichao Li <peichao.wang at bitland.corp-partner.google.com>
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