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authorCasper Chang <casper_chang@wistron.corp-partner.google.com>2019-07-12 22:06:05 +0800
committerDuncan Laurie <dlaurie@chromium.org>2019-07-15 18:13:20 +0000
commit23c923ba727412eb151539c17c92b201316c0324 (patch)
tree893fdfbd2a4ae63a74eb6596c522972ae115f517 /src/mainboard/google/sarien
parentd3ce8c844221bfbcfd64d14e3ed815a5a39fcd72 (diff)
downloadcoreboot-23c923ba727412eb151539c17c92b201316c0324.tar.xz
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>
Diffstat (limited to 'src/mainboard/google/sarien')
-rw-r--r--src/mainboard/google/sarien/variants/arcada/devicetree.cb1
1 files changed, 1 insertions, 0 deletions
diff --git a/src/mainboard/google/sarien/variants/arcada/devicetree.cb b/src/mainboard/google/sarien/variants/arcada/devicetree.cb
index ce960a74c0..cd1925840a 100644
--- a/src/mainboard/google/sarien/variants/arcada/devicetree.cb
+++ b/src/mainboard/google/sarien/variants/arcada/devicetree.cb
@@ -175,6 +175,7 @@ chip soc/intel/cannonlake
.speed = I2C_SPEED_FAST,
.rise_time_ns = 52,
.fall_time_ns = 110,
+ .data_hold_time_ns = 330,
},
.i2c[4] = {
.early_init = 1,