From 4f176913c102599c59c98c0729cc198ad19adda4 Mon Sep 17 00:00:00 2001
From: Edward O'Callaghan <quasisec@google.com>
Date: Fri, 17 Jan 2020 18:47:11 +1100
Subject: mainboard/puff: Tune ALC5682I rise_fall times on i2c

Tunes the headphone amp i2c with measured signal shape.

BUG=b:147192377
BRANCH=none
TEST=builds and measured i2c frequency below 400khz

Change-Id: I60f73bcf60ed140f595c953be371b982a63f7b95
Signed-off-by: Edward O'Callaghan <quasisec@google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/38459
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Furquan Shaikh <furquan@google.com>
Reviewed-by: Edward O'Callaghan <quasisec@chromium.org>
Reviewed-by: Daniel Kurtz <djkurtz@google.com>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
---
 src/mainboard/google/hatch/variants/puff/overridetree.cb | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

(limited to 'src/mainboard')

diff --git a/src/mainboard/google/hatch/variants/puff/overridetree.cb b/src/mainboard/google/hatch/variants/puff/overridetree.cb
index bf9120adbc..3507e6d5eb 100644
--- a/src/mainboard/google/hatch/variants/puff/overridetree.cb
+++ b/src/mainboard/google/hatch/variants/puff/overridetree.cb
@@ -161,8 +161,8 @@ chip soc/intel/cannonlake
 		},
 		.i2c[4] = {
 			.speed = I2C_SPEED_FAST,
-			.rise_time_ns = 0,
-			.fall_time_ns = 0,
+			.rise_time_ns = 60,
+			.fall_time_ns = 60,
 		},
 	}"
 
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