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authorDavid Wu <david_wu@quanta.corp-partner.google.com>2019-12-19 17:20:53 +0800
committerPatrick Georgi <pgeorgi@google.com>2019-12-20 17:56:06 +0000
commit6de7ecb585e705beab32e7464d364f2284ccae54 (patch)
treea0e38984250781faa127a1b29eda3ceef41888ce
parent9ac409c7e5062ee61d1259a20bf480ec6834d9b3 (diff)
downloadcoreboot-6de7ecb585e705beab32e7464d364f2284ccae54.tar.xz
mb/google/hatch/var/kindred: Decrease i2c frequency below 400 KHz
Before tuning i2c frequency, I2C0: 479.4 KHz I2C1: 491.4 KHz I2C4: 476.4 KHz After tuning i2c frequency, I2C0: 391.8 KHz I2C1: 396.4 KHz I2C4: 388.8 KHz BUG=b:146535585 BRANCH=hatch TEST=emerge-hatch coreboot chromeos-bootimage Change-Id: I55d095efb60eba4e860b54bb90e8e0df62d88419 Signed-off-by: David Wu <david_wu@quanta.corp-partner.google.com> Reviewed-on: https://review.coreboot.org/c/coreboot/+/37831 Reviewed-by: Philip Chen <philipchen@google.com> Reviewed-by: Paul Fagerburg <pfagerburg@chromium.org> Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net> Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
-rw-r--r--src/mainboard/google/hatch/variants/kindred/overridetree.cb6
1 files changed, 6 insertions, 0 deletions
diff --git a/src/mainboard/google/hatch/variants/kindred/overridetree.cb b/src/mainboard/google/hatch/variants/kindred/overridetree.cb
index 1122609649..a000add5b0 100644
--- a/src/mainboard/google/hatch/variants/kindred/overridetree.cb
+++ b/src/mainboard/google/hatch/variants/kindred/overridetree.cb
@@ -36,12 +36,18 @@ chip soc/intel/cannonlake
},
.i2c[0] = {
.speed = I2C_SPEED_FAST,
+ .rise_time_ns = 50,
+ .fall_time_ns = 15,
},
.i2c[1] = {
.speed = I2C_SPEED_FAST,
+ .rise_time_ns = 60,
+ .fall_time_ns = 25,
},
.i2c[4] = {
.speed = I2C_SPEED_FAST,
+ .rise_time_ns = 60,
+ .fall_time_ns = 60,
},
}"