diff options
| author | Johnny Li <johnny_li@wistron.corp-partner.google.com> | 2020-07-23 13:37:30 +0800 |
|---|---|---|
| committer | Patrick Georgi <pgeorgi@google.com> | 2020-07-28 19:18:40 +0000 |
| commit | 9399de9bb7ed59e36704e024199c229a595b9a37 (patch) | |
| tree | 7bc346f7c0c129e76f981060d79bac7997a5932f /src | |
| parent | c8e4dcb569677d7d603dddaec9ac1654f70d0fd9 (diff) | |
| download | coreboot-9399de9bb7ed59e36704e024199c229a595b9a37.tar.xz | |
mb/google/volteer/var/volteer: 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: If59502aec7c3ab55864a518d626cde52aee18373
Reviewed-on: https://review.coreboot.org/c/coreboot/+/43746
Reviewed-by: Tim Wawrzynczak <twawrzynczak@chromium.org>
Reviewed-by: Caveh Jalali <caveh@chromium.org>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Diffstat (limited to 'src')
| -rw-r--r-- | src/mainboard/google/volteer/variants/volteer/overridetree.cb | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/src/mainboard/google/volteer/variants/volteer/overridetree.cb b/src/mainboard/google/volteer/variants/volteer/overridetree.cb index 54566f711d..c7350cb926 100644 --- a/src/mainboard/google/volteer/variants/volteer/overridetree.cb +++ b/src/mainboard/google/volteer/variants/volteer/overridetree.cb @@ -1,5 +1,48 @@ chip soc/intel/tigerlake register "SaGv" = "SaGv_Disabled" + #+-------------------+---------------------------+ + #| 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" = "{ + .chipset_lockdown = CHIPSET_LOCKDOWN_COREBOOT, + .gspi[0] = { + .speed_mhz = 1, + .early_init = 1, + }, + .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, + }, + }, + }" device domain 0 on device pci 15.0 on chip drivers/i2c/generic |