diff options
| author | Jing Tong <tongjian@huaqin.corp-partner.google.com> | 2024-07-01 13:42:33 +0800 |
|---|---|---|
| committer | Felix Held <felix-coreboot@felixheld.de> | 2024-07-03 13:57:22 +0000 |
| commit | d5de10f02ee3c344f81a39428b60114c521b4597 (patch) | |
| tree | dfa1575fb63e3a777e2dad0404e3df61318feed0 /src/mainboard/google | |
| parent | cae81a567462b4ab2494b4e6cee0ee20ea4a2fcf (diff) | |
mb/google/brox/var/lotso: Tune I2C frequency for 400 kHz
Before:
I2C0 - 401kHz
I2C4 - 405kHz
After:
I2C0 - 392kHz
I2C4 - 395kHz
HW: Change R8409/R8411 to 33ohm.
BUG=b:349743464,b:349735055
TEST=emerge-brox sys-boot/coreboot
Test pass by EE
Change-Id: I985837b1b80e973f148529b446905580c0f95e98
Signed-off-by: Jian Tong <tongjian@huaqin.corp-partner.google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/83290
Reviewed-by: Eric Lai <ericllai@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Kun Liu <liukun11@huaqin.corp-partner.google.com>
Diffstat (limited to 'src/mainboard/google')
| -rw-r--r-- | src/mainboard/google/brox/variants/lotso/overridetree.cb | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/src/mainboard/google/brox/variants/lotso/overridetree.cb b/src/mainboard/google/brox/variants/lotso/overridetree.cb index 274e22c106..187840f1ce 100644 --- a/src/mainboard/google/brox/variants/lotso/overridetree.cb +++ b/src/mainboard/google/brox/variants/lotso/overridetree.cb @@ -48,6 +48,22 @@ chip soc/intel/alderlake register "tcss_ports[0]" = "TCSS_PORT_EMPTY" # Disable TCP0 register "tcss_ports[2]" = "TCSS_PORT_EMPTY" # Disable TCP2 + register "common_soc_config" = "{ + .i2c[0] = { + .speed = I2C_SPEED_FAST, + .rise_time_ns = 650, + .fall_time_ns = 350, + .data_hold_time_ns = 400, + }, + .i2c[4] = { + .early_init = 1, + .speed = I2C_SPEED_FAST, + .rise_time_ns = 600, + .fall_time_ns = 110, + .data_hold_time_ns = 100, + }, + }" + register "serial_io_gspi_mode" = "{ [PchSerialIoIndexGSPI0] = PchSerialIoPci, [PchSerialIoIndexGSPI1] = PchSerialIoPci, |