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mb/google/sarien/variants/arcada: Set data hold time for touchpad 

Elan's touchpad requires min 0.3us data hold time.
To fine tune the data hold time of i2c1 to meet
specification of Elan's touchpad.

BUG=None
BRANCH=None
TEST=Verified data hold time of i2c1 is around 320ns

Signed-off-by: Casper Chang <casper_chang@wistron.corp-partner.google.com>
Change-Id: I0fa9db3b50e74f193261be96bd9e305bb19841e3
Reviewed-on: https://review.coreboot.org/c/coreboot/+/34288
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Nick Crews <ncrews@google.com>
Reviewed-by: Duncan Laurie <dlaurie@chromium.org>
This commit is contained in:
Casper Chang 2019-07-12 22:06:05 +08:00 committed by Duncan Laurie
parent d3ce8c8442
commit 23c923ba72
1 changed files with 1 additions and 0 deletions
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src/mainboard/google/sarien/variants/arcada/devicetree.cb
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@ -175,6 +175,7 @@ chip soc/intel/cannonlake
.speed = I2C_SPEED_FAST, .speed = I2C_SPEED_FAST,
.rise_time_ns = 52, .rise_time_ns = 52,
.fall_time_ns = 110, .fall_time_ns = 110,
.data_hold_time_ns = 330,
}, },
.i2c[4] = { .i2c[4] = {
.early_init = 1, .early_init = 1,