Chris Zhou has uploaded this change for review.
google/grunt: Update Audio/H1/TP i2c timings
After adjustment on Liara Proto
Audio: 399.2 KHz
H1: 398.3 KHz
TP: 399.0 KHz
BUG=b:113319200
BRANCH=master
TEST=emerge-grunt coreboot chromeos-bootimage
measure by scope
Change-Id: Ibba8c823ed8451a804cf731d49e7568a94ac7c6b
Signed-off-by: Chris Zhou <chris_zhou@compal.corp-partner.google.com>
---
M src/mainboard/google/kahlee/variants/liara/devicetree.cb
1 file changed, 4 insertions(+), 4 deletions(-)
git pull ssh://review.coreboot.org:29418/coreboot refs/changes/97/28397/1
diff --git a/src/mainboard/google/kahlee/variants/liara/devicetree.cb b/src/mainboard/google/kahlee/variants/liara/devicetree.cb
index b330ec5..cf6dd5f 100644
--- a/src/mainboard/google/kahlee/variants/liara/devicetree.cb
+++ b/src/mainboard/google/kahlee/variants/liara/devicetree.cb
@@ -24,7 +24,7 @@
# Enable I2C0 for audio, USB3 hub at 400kHz
register "i2c[0]" = "{
.speed = I2C_SPEED_FAST,
- .rise_time_ns = 95,
+ .rise_time_ns = 85,
.fall_time_ns = 3,
}"
@@ -32,15 +32,15 @@
register "i2c[1]" = "{
.early_init = 1,
.speed = I2C_SPEED_FAST,
- .rise_time_ns = 84,
+ .rise_time_ns = 45,
.fall_time_ns = 4,
}"
# Enable I2C2 for trackpad, pen at 400kHz
register "i2c[2]" = "{
.speed = I2C_SPEED_FAST,
- .rise_time_ns = 117,
- .fall_time_ns = 113,
+ .rise_time_ns = 48,
+ .fall_time_ns = 37,
}"
# Enable I2C3 for touchscreen at 400kHz
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