mb/google/zork/vilboz: Increase eMMC initial clock frequency

This will reduce boot time by 7ms. Some of the initial designs
don't have a pull-up resistor on the CMD line. These designs still boot
at 400 kHz despite not having the pull-up.

BUG=b:158766134
TEST=Boot on Vilboz with emmc
BRANCH=zork

Signed-off-by: Rob Barnes <robbarnes@google.com>
Change-Id: I9a1e47dbee3fcc7317857d40c5418be30d755d61
Reviewed-on: https://review.coreboot.org/c/coreboot/+/45933
Reviewed-by: Martin Roth <martinroth@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
This commit is contained in:
Rob Barnes 2020-10-01 15:17:27 -06:00 committed by Patrick Georgi
parent 30f583264d
commit 8d67da6b0d
1 changed files with 6 additions and 0 deletions

View File

@ -41,6 +41,12 @@ chip soc/amd/picasso
.early_init = true,
}"
register "emmc_config" = "{
.timing = SD_EMMC_EMMC_HS400,
.sdr104_hs400_driver_strength = SD_EMMC_DRIVE_STRENGTH_A,
.init_khz_preset = 400,
}"
# See AMD 55570-B1 Table 13: PCI Device ID Assignments.
device domain 0 on
subsystemid 0x1022 0x1510 inherit