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authorFrank Chu <frank_chu@pegatron.corp-partner.google.com>2020-11-19 15:13:45 +0800
committerPatrick Georgi <pgeorgi@google.com>2020-11-30 08:07:50 +0000
commitae99ea5f08ffa3f59864c5ed7f06e00db31218fd (patch)
treedbe37038c06cf513e5e0981d01a53314e73e5f43 /src/mainboard/google/volteer/variants
parent092813a50ce4198d622daa809181216b6ffd1bd4 (diff)
mb/google/volteer/variants/delbin: Enhance I2C5 bus freq closer 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:173670150 TEST=Verified that I2C5 frequency is between 386-387kHz. Signed-off-by: Frank Chu <frank_chu@pegatron.corp-partner.google.com> Change-Id: I6d60abe15645dc51ed9ee30975d2521b8940c2d0 Reviewed-on: https://review.coreboot.org/c/coreboot/+/47736 Reviewed-by: Zhuohao Lee <zhuohao@google.com> Reviewed-by: Zhuohao Lee <zhuohao@chromium.org> Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Diffstat (limited to 'src/mainboard/google/volteer/variants')
-rw-r--r--src/mainboard/google/volteer/variants/delbin/overridetree.cb43
1 files changed, 43 insertions, 0 deletions
diff --git a/src/mainboard/google/volteer/variants/delbin/overridetree.cb b/src/mainboard/google/volteer/variants/delbin/overridetree.cb
index bd4bf8041e..904f3e0e2e 100644
--- a/src/mainboard/google/volteer/variants/delbin/overridetree.cb
+++ b/src/mainboard/google/volteer/variants/delbin/overridetree.cb
@@ -2,6 +2,49 @@ chip soc/intel/tigerlake
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 |
+ #| 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,
+ },
+ },
+ }"
+
# Acoustic settings
register "AcousticNoiseMitigation" = "1"
register "SlowSlewRate[VR_DOMAIN_IA]" = "SLEW_FAST_8"