From 12b376c87ff9367133618866659d2a5987d3e9a5 Mon Sep 17 00:00:00 2001
From: Ren Kuo <ren.kuo@quanta.corp-partner.google.com>
Date: Wed, 21 Oct 2020 11:26:48 +0800
Subject: mb/google/dedede/var/magolor: Configure I2C high and low time
Configure the I2C bus high and low time for all enabled I2C buses.
BUG=b:168783630
TEST=Measured the I2C bus frequency reduce to 387 KHz.
Signed-off-by: Ren Kuo <ren.kuo@quanta.corp-partner.google.com>
Change-Id: I9f5b81815f86db7bdcea95a95b9c9b235b4a34b1
Reviewed-on: https://review.coreboot.org/c/coreboot/+/46613
Reviewed-by: Karthik Ramasubramanian <kramasub@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
---
.../google/dedede/variants/magolor/overridetree.cb | 24 ++++++++++++++++++++++
1 file changed, 24 insertions(+)
(limited to 'src')
diff --git a/src/mainboard/google/dedede/variants/magolor/overridetree.cb b/src/mainboard/google/dedede/variants/magolor/overridetree.cb
index f41e9fab6b..625546e7ff 100644
--- a/src/mainboard/google/dedede/variants/magolor/overridetree.cb
+++ b/src/mainboard/google/dedede/variants/magolor/overridetree.cb
@@ -25,18 +25,42 @@ chip soc/intel/jasperlake
},
.i2c[0] = {
.speed = I2C_SPEED_FAST,
+ .speed_config[0] = {
+ .speed = I2C_SPEED_FAST,
+ .scl_lcnt = 190,
+ .scl_hcnt = 100,
+ .sda_hold = 40,
+ }
},
.i2c[1] = {
.speed = I2C_SPEED_FAST,
},
.i2c[2] = {
.speed = I2C_SPEED_FAST,
+ .speed_config[0] = {
+ .speed = I2C_SPEED_FAST,
+ .scl_lcnt = 190,
+ .scl_hcnt = 100,
+ .sda_hold = 40,
+ }
},
.i2c[3] = {
.speed = I2C_SPEED_FAST,
+ .speed_config[0] = {
+ .speed = I2C_SPEED_FAST,
+ .scl_lcnt = 190,
+ .scl_hcnt = 100,
+ .sda_hold = 40,
+ }
},
.i2c[4] = {
.speed = I2C_SPEED_FAST,
+ .speed_config[0] = {
+ .speed = I2C_SPEED_FAST,
+ .scl_lcnt = 190,
+ .scl_hcnt = 100,
+ .sda_hold = 40,
+ }
},
}"
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