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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>
This commit is contained in:
Ren Kuo 2022-07-01 18:18:53 +08:00 committed by Felix Held
parent fd52e66e77
commit 6b3f7a9145
1 changed files with 2 additions and 11 deletions
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13
src/mainboard/google/brya/variants/volmar/overridetree.cb
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@ -56,34 +56,25 @@ chip soc/intel/alderlake
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,
},
}"