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| author | Rob Barnes <robbarnes@google.com> | 2020-10-01 15:15:32 -0600 |
|---|---|---|
| committer | Patrick Georgi <pgeorgi@google.com> | 2020-10-12 08:37:07 +0000 |
| commit | c4a5acdabc28778b49a1c088b0736bac83e2ab51 (patch) | |
| tree | 1bf064ccf8e482697e246590439651e17b1d6c2f /src/mainboard/google | |
| parent | d9352e69db7197a83362a2cdd2a1aa5660d46530 (diff) | |
| download | coreboot-c4a5acdabc28778b49a1c088b0736bac83e2ab51.tar.xz | |
mb/google/zork/dalboz: 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=WIP
BRANCH=zork
Signed-off-by: Rob Barnes <robbarnes@google.com>
Change-Id: I1191d73a2a3f72f99de187a946162460acbb287a
Reviewed-on: https://review.coreboot.org/c/coreboot/+/45935
Reviewed-by: Martin Roth <martinroth@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Diffstat (limited to 'src/mainboard/google')
| -rw-r--r-- | src/mainboard/google/zork/variants/dalboz/overridetree.cb | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/src/mainboard/google/zork/variants/dalboz/overridetree.cb b/src/mainboard/google/zork/variants/dalboz/overridetree.cb index 1ddb17bdf4..e5608d9091 100644 --- a/src/mainboard/google/zork/variants/dalboz/overridetree.cb +++ b/src/mainboard/google/zork/variants/dalboz/overridetree.cb @@ -37,6 +37,12 @@ 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 |