Martin Roth has uploaded this change for review.
mb/google/kahlee: Update i2c timings
Change the I2c timings to the latest measurements.
BUG=b:72442912
TEST=Boot grunt
Change-Id: Ib961ec7c2b0a677d9cacdb7d91e5c78173d42017
Signed-off-by: Martin Roth <martinroth@google.com>
---
M src/mainboard/google/kahlee/variants/grunt/devicetree.cb
1 file changed, 7 insertions(+), 7 deletions(-)
git pull ssh://review.coreboot.org:29418/coreboot refs/changes/42/25942/1
diff --git a/src/mainboard/google/kahlee/variants/grunt/devicetree.cb b/src/mainboard/google/kahlee/variants/grunt/devicetree.cb
index cfc3198..65e9ae8 100644
--- a/src/mainboard/google/kahlee/variants/grunt/devicetree.cb
+++ b/src/mainboard/google/kahlee/variants/grunt/devicetree.cb
@@ -24,30 +24,30 @@
# Enable I2C0 for audio, USB3 hub at 400kHz
register "i2c[0]" = "{
.speed = I2C_SPEED_FAST,
- .rise_time_ns = 95,
- .fall_time_ns = 3,
+ .rise_time_ns = 300,
+ .fall_time_ns = 34,
}"
# Enable I2C1 for H1 at 400kHz
register "i2c[1]" = "{
.early_init = 1,
.speed = I2C_SPEED_FAST,
- .rise_time_ns = 84,
+ .rise_time_ns = 140,
.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 = 320,
+ .fall_time_ns = 34,
}"
# Enable I2C3 for touchscreen at 400kHz
register "i2c[3]" = "{
.speed = I2C_SPEED_FAST,
- .rise_time_ns = 82,
- .fall_time_ns = 67,
+ .rise_time_ns = 320,
+ .fall_time_ns = 34,
}"
device cpu_cluster 0 on
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