Tao Xia has uploaded this change for review.
mb/google/dedede/var/sasukette: Configure I2C times for touchpad
Configure I2C high / low time in the device tree to ensure I2C
CLK runs accurately between 380 kHz and 400 kHz.
Measured I2C frequency just as below after tuning:
touchpad:390.4 kHz
BUG=b:192601250
BRANCH=dedede
TEST=Build and check after tuning I2C clock is between 380 kHz and 400 kHz
Signed-off-by: Tao Xia <xiatao5@huaqin.corp-partner.google.com>
Change-Id: Ibe1603a48a3e841b6a50aa0c703697ec615b2854
---
M src/mainboard/google/dedede/variants/sasukette/overridetree.cb
1 file changed, 2 insertions(+), 2 deletions(-)
git pull ssh://review.coreboot.org:29418/coreboot refs/changes/16/56016/1
diff --git a/src/mainboard/google/dedede/variants/sasukette/overridetree.cb b/src/mainboard/google/dedede/variants/sasukette/overridetree.cb
index a39b9d1..776ba8a 100644
--- a/src/mainboard/google/dedede/variants/sasukette/overridetree.cb
+++ b/src/mainboard/google/dedede/variants/sasukette/overridetree.cb
@@ -23,8 +23,8 @@
.speed = I2C_SPEED_FAST,
.speed_config[0] = {
.speed = I2C_SPEED_FAST,
- .scl_lcnt = 185,
- .scl_hcnt = 95,
+ .scl_lcnt = 180,
+ .scl_hcnt = 90,
.sda_hold = 40,
}
},
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