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mb/google/dedede/var/pirika: Configure I2C times to 380-400 kHz for touchpad 

Configure I2C high / low time in the device tree to ensure I2C
CLK runs accurately between 380 kHz and 400 kHz.

Audio codec:388.91 kHz
Touchpad:394.48 kHz

BUG=b:193864546
BRANCH=dedede
TEST=Build and check after tuning I2C clock is between 380 kHz and 400 kHz

Signed-off-by: Alex1 Kao <alex1_kao@pegatron.corp-partner.google.com>
Change-Id: Ia57c90ead44ceb0990878dc0566e595bae5a9099
Reviewed-on: https://review.coreboot.org/c/coreboot/+/56383
Reviewed-by: Kirk Wang <kirk_wang@pegatron.corp-partner.google.com>
Reviewed-by: Karthik Ramasubramanian <kramasub@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
This commit is contained in:
Alex1 Kao 2021-07-16 19:00:10 +08:00 committed by Patrick Georgi
parent 2597dc10d6
commit 72cfaf05bf
1 changed files with 12 additions and 12 deletions
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24
src/mainboard/google/dedede/variants/pirika/overridetree.cb
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@ -9,9 +9,6 @@ chip soc/intel/jasperlake
#| | for TPM communication |
#| | before memory is up |
#| I2C0 | Trackpad |
#| I2C1 | Digitizer |
#| I2C2 | Touchscreen |
#| I2C3 | Camera |
#| I2C4 | Audio |
#+-------------------+---------------------------+
register "common_soc_config" = "{
@ -21,21 +18,24 @@ chip soc/intel/jasperlake
},
.i2c[0] = {
.speed = I2C_SPEED_FAST,
},
.i2c[1] = {
.speed = I2C_SPEED_FAST,
},
.i2c[2] = {
.speed = I2C_SPEED_FAST,
},
.i2c[3] = {
.speed = I2C_SPEED_FAST,
.rise_time_ns = 260,
.fall_time_ns = 50,
},
.i2c[4] = {
.speed = I2C_SPEED_FAST,
.rise_time_ns = 260,
.fall_time_ns = 50,
},
}"
register "SerialIoI2cMode" = "{
[PchSerialIoIndexI2C0] = PchSerialIoPci,
[PchSerialIoIndexI2C1] = PchSerialIoDisabled,
[PchSerialIoIndexI2C2] = PchSerialIoDisabled,
[PchSerialIoIndexI2C3] = PchSerialIoDisabled,
[PchSerialIoIndexI2C4] = PchSerialIoPci,
}"
# USB Port Configuration
register "usb2_ports[2]" = "{
.enable = 1,