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mb/google/kahlee: Update i2c timings 

Change the I2c timings to the latest measurements.

BUG=b:72442912
TEST=Boot grunt

Change-Id: I6f9538d26b77ae952ad585e569b3a836e1a09da2
Signed-off-by: Matt Wells <dawells@google.com>
Reviewed-on: https://review.coreboot.org/27553
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Martin Roth <martinroth@google.com>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
This commit is contained in:
Matt Wells 2018-07-19 12:21:22 -06:00 committed by Patrick Georgi
parent 8583a716bc
commit c8e974f063
1 changed files with 8 additions and 8 deletions
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16
src/mainboard/google/kahlee/variants/grunt/devicetree.cb
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@ -24,30 +24,30 @@ chip soc/amd/stoneyridge
# 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 = 151,
.fall_time_ns = 50,
}"
# Enable I2C1 for H1 at 400kHz
register "i2c[1]" = "{
.early_init = 1,
.speed = I2C_SPEED_FAST,
.rise_time_ns = 84,
.fall_time_ns = 4,
.rise_time_ns = 62,
.fall_time_ns = 2,
}"
# 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 = 170,
.fall_time_ns = 91,
}"
# Enable I2C3 for touchscreen at 400kHz
register "i2c[3]" = "{
.speed = I2C_SPEED_FAST,
.rise_time_ns = 82,
.fall_time_ns = 67,
.rise_time_ns = 84,
.fall_time_ns = 50,
}"
device cpu_cluster 0 on