mb/google/brya/var/volmar: I2C timing fine tune
Configure the I2C bus timing for all enabled I2C buses.
BUG=b:237751906
TEST=Verify the build for volmar board and measure the freq
is under 400KHz
Signed-off-by: Ren Kuo <ren.kuo@quanta.corp-partner.google.com>
Change-Id: Iffa128146f5d8bec6dd3d5c2d1e7efd96895dc6b
Reviewed-on: https://review.coreboot.org/c/coreboot/+/65604
Reviewed-by: David Wu <david_wu@quanta.corp-partner.google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
diff --git a/src/mainboard/google/brya/variants/volmar/overridetree.cb b/src/mainboard/google/brya/variants/volmar/overridetree.cb
index b7a8b82..ff2757a 100644
--- a/src/mainboard/google/brya/variants/volmar/overridetree.cb
+++ b/src/mainboard/google/brya/variants/volmar/overridetree.cb
@@ -56,34 +56,25 @@
register "common_soc_config" = "{
.i2c[0] = {
.speed = I2C_SPEED_FAST,
- .rise_time_ns = 650,
- .fall_time_ns = 400,
- .data_hold_time_ns = 50,
},
.i2c[1] = {
.early_init = 1,
.speed = I2C_SPEED_FAST,
- .rise_time_ns = 600,
+ .rise_time_ns = 550,
.fall_time_ns = 400,
.data_hold_time_ns = 50,
},
.i2c[2] = {
.speed = I2C_SPEED_FAST,
- .rise_time_ns = 650,
- .fall_time_ns = 400,
- .data_hold_time_ns = 50,
},
.i2c[3] = {
.speed = I2C_SPEED_FAST,
- .rise_time_ns = 650,
+ .rise_time_ns = 550,
.fall_time_ns = 400,
.data_hold_time_ns = 50,
},
.i2c[5] = {
.speed = I2C_SPEED_FAST,
- .rise_time_ns = 650,
- .fall_time_ns = 400,
- .data_hold_time_ns = 50,
},
}"