From 23c923ba727412eb151539c17c92b201316c0324 Mon Sep 17 00:00:00 2001
From: Casper Chang <casper_chang@wistron.corp-partner.google.com>
Date: Fri, 12 Jul 2019 22:06:05 +0800
Subject: [PATCH] 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>
---
 src/mainboard/google/sarien/variants/arcada/devicetree.cb | 1 +
 1 file changed, 1 insertion(+)

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,