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mb/google/brya: Add I2C parameter 

Add I2C parameters to make sure each bus speed is around 390kHz.

BUG=b:188793264
TEST=Measure by scope.

Signed-off-by: Eric Lai <ericr_lai@compal.corp-partner.google.com>
Change-Id: Ib47228b8684c44f6acfec9e9e4b6e7b18ba6f6c0
Reviewed-on: https://review.coreboot.org/c/coreboot/+/56970
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Varshit B Pandya <varshit.b.pandya@intel.com>
Reviewed-by: Tim Wawrzynczak <twawrzynczak@chromium.org>
This commit is contained in:
Eric Lai 2021-08-13 17:04:45 +08:00 committed by Felix Held
parent 93a6c39b86
commit 637470c438
1 changed files with 15 additions and 0 deletions
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15
src/mainboard/google/brya/variants/baseboard/brya/devicetree.cb
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@ -95,19 +95,34 @@ chip soc/intel/alderlake
register "common_soc_config" = "{ register "common_soc_config" = "{
.i2c[0] = { .i2c[0] = {
.speed = I2C_SPEED_FAST, .speed = I2C_SPEED_FAST,
.rise_time_ns = 650,
.fall_time_ns = 400,
.data_hold_time_ns = 50,
}, },
.i2c[1] = { .i2c[1] = {
.speed = I2C_SPEED_FAST, .speed = I2C_SPEED_FAST,
.rise_time_ns = 650,
.fall_time_ns = 400,
.data_hold_time_ns = 50,
}, },
.i2c[2] = { .i2c[2] = {
.speed = I2C_SPEED_FAST, .speed = I2C_SPEED_FAST,
.rise_time_ns = 900,
.fall_time_ns = 400,
.data_hold_time_ns = 50,
}, },
.i2c[3] = { .i2c[3] = {
.early_init = 1, .early_init = 1,
.speed = I2C_SPEED_FAST, .speed = I2C_SPEED_FAST,
.rise_time_ns = 600,
.fall_time_ns = 400,
.data_hold_time_ns = 50,
}, },
.i2c[5] = { .i2c[5] = {
.speed = I2C_SPEED_FAST, .speed = I2C_SPEED_FAST,
.rise_time_ns = 650,
.fall_time_ns = 400,
.data_hold_time_ns = 50,
}, },
}" }"