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mb/google/dedede/var/sasukette: Configure I2C times for touchpad/codec/AMP 

Configure I2C high / low time in device tree to ensure I2C
CLK runs accurately at I2C_SPEED_FAST (400 kHz).

Measured I2C frequency just as below after tuning:
touchpad:372 kHz
audio codec RT5682:386.8 kHz
speaker AMP L:387.5 kHz
speaker AMP R:388.9 kHz

BUG=b:181342340
BRANCH=dedede
TEST=Build and check after tuning I2C clock is under 400kHz

Signed-off-by: Tao Xia <xiatao5@huaqin.corp-partner.google.com>
Change-Id: I05d78c088190e349281a34b2aeed39ae8d867dc2
Reviewed-on: https://review.coreboot.org/c/coreboot/+/51112
Reviewed-by: Karthik Ramasubramanian <kramasub@google.com>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
This commit is contained in:
Tao Xia 2021-02-27 15:17:24 +08:00 committed by Patrick Georgi
parent a03b18012d
commit bda338a1be
1 changed files with 12 additions and 0 deletions
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12
src/mainboard/google/dedede/variants/sasukette/overridetree.cb
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@ -21,6 +21,12 @@ chip soc/intel/jasperlake
},
.i2c[0] = {
.speed = I2C_SPEED_FAST,
.speed_config[0] = {
.speed = I2C_SPEED_FAST,
.scl_lcnt = 185,
.scl_hcnt = 95,
.sda_hold = 40,
}
},
.i2c[1] = {
.speed = I2C_SPEED_FAST,
@ -33,6 +39,12 @@ chip soc/intel/jasperlake
},
.i2c[4] = {
.speed = I2C_SPEED_FAST,
.speed_config[0] = {
.speed = I2C_SPEED_FAST,
.scl_lcnt = 185,
.scl_hcnt = 95,
.sda_hold = 40,
}
},
}"