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UPSTREAM: mb/google/eve: Update touchpad I2C timing

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The touchpad frequency was still slightly above 400kHz so tweak
the timing values manually to get under the spec limit.

BUG=b:35583133
TEST=verified the bus frequency with a scope to be < 400kHz

Change-Id: I07b171ebe912bf603049656e48beeeabdd56fef6
Signed-off-by: Furquan Shaikh <furquan@chromium.org>
Original-Commit-Id: 4f7d536ed3
Original-Change-Id: I8bd071a8e15a791b7551ac256797e87abd6b5e5a
Original-Signed-off-by: Duncan Laurie <dlaurie@chromium.org>
Original-Reviewed-on: https://review.coreboot.org/19727
Original-Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Original-Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Original-Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-on: https://chromium-review.googlesource.com/507637
This commit is contained in:
Duncan Laurie 2017-05-16 19:04:16 -07:00 • committed by chrome-bot
parent 0ba5470056
commit 166c22fb85
1 changed files with 6 additions and 2 deletions
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8
src/mainboard/google/eve/devicetree.cb
View file

@ -182,8 +182,12 @@ chip soc/intel/skylake
register "i2c_voltage[2]" = "I2C_VOLTAGE_1V8"
register "i2c[2]" = "{
.speed = I2C_SPEED_FAST,
.rise_time_ns = 111,
.fall_time_ns = 41,
.speed_config[0] = {
.speed = I2C_SPEED_FAST,
.scl_lcnt = 186,
.scl_hcnt = 93,
.sda_hold = 36,
}
}"
# Audio