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mb/google/volteer/variants/volteer2: I2C5 trackpad bus freq 400 kHz 

The current I2C5 bus frequency is 367 kHZ, which does not meet the spec.
This change updates scl_lcnt, scl_hcnt, scl_hcnt value for I2C5 to bring
the bus frequency closer to 400kHz.

BUG=b:153588771
TEST=Verified that I2C5 frequency is between 389-396kHz.

Signed-off-by: Johnny Li <johnny_li@wistron.corp-partner.google.com>
Change-Id: If0803a74ba9071acf15486ce4038261c1681a92f
Reviewed-on: https://review.coreboot.org/c/coreboot/+/46142
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Tim Wawrzynczak <twawrzynczak@chromium.org>
This commit is contained in:
Johnny Li 2020-10-08 09:11:21 +08:00 committed by Tim Wawrzynczak
parent 69c0b19ae1
commit 8269692517
1 changed files with 38 additions and 0 deletions
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38
src/mainboard/google/volteer/variants/volteer2/overridetree.cb
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@ -4,6 +4,44 @@ chip soc/intel/tigerlake
register "IomTypeCPortPadCfg[1]" = "0x090E000D"
register "DdiPort1Hpd" = "0"
register "DdiPort2Hpd" = "0"
#+-------------------+---------------------------+
#| Field | Value |
#+-------------------+---------------------------+
#| chipset_lockdown | CHIPSET_LOCKDOWN_COREBOOT |
#| GSPI0 | cr50 TPM. Early init is |
#| | required to set up a BAR |
#| | for TPM communication |
#| | before memory is up |
#| GSPI1 | Fingerprint MCU |
#| I2C0 | Audio |
#| I2C1 | Touchscreen |
#| I2C2 | WLAN, SAR0 |
#| I2C3 | Camera, SAR1 |
#| I2C5 | Trackpad |
#+-------------------+---------------------------+
register "common_soc_config" = "{
.i2c[0] = {
.speed = I2C_SPEED_FAST,
},
.i2c[1] = {
.speed = I2C_SPEED_FAST,
},
.i2c[2] = {
.speed = I2C_SPEED_FAST,
},
.i2c[3] = {
.speed = I2C_SPEED_FAST,
},
.i2c[5] = {
.speed = I2C_SPEED_FAST,
.speed_config[0] = {
.speed = I2C_SPEED_FAST,
.scl_lcnt = 163,
.scl_hcnt = 75,
.sda_hold = 36,
},
},
}"
register "HybridStorageMode" = "1"