diff options
| author | Raul E Rangel <rrangel@chromium.org> | 2020-09-29 14:20:48 -0600 |
|---|---|---|
| committer | Paul Fagerburg <pfagerburg@chromium.org> | 2020-10-08 22:23:42 +0000 |
| commit | cada76333f4d703707d325d65756026bbf5db115 (patch) | |
| tree | 74a3701d90f7758a7f893901bf7fa16cd04bb2b5 /src/mainboard/google/zork/variants | |
| parent | 481ab24f46fc3e15b501d0aeb0e494b9cbd390d6 (diff) | |
mb/google/zork/ezkinil: 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 Ezkinil w/ eMMC to OS.
Signed-off-by: Raul E Rangel <rrangel@chromium.org>
Change-Id: Ida0bbf9bd772ab7d384d5d097fa3b02b846a3efa
Reviewed-on: https://review.coreboot.org/c/coreboot/+/45852
Reviewed-by: Furquan Shaikh <furquan@google.com>
Reviewed-by: Martin Roth <martinroth@google.com>
Reviewed-by: Eric Peers <epeers@google.com>
Reviewed-by: Paul Fagerburg <pfagerburg@chromium.org>
Reviewed-by: Rob Barnes <robbarnes@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Diffstat (limited to 'src/mainboard/google/zork/variants')
| -rw-r--r-- | src/mainboard/google/zork/variants/ezkinil/overridetree.cb | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/src/mainboard/google/zork/variants/ezkinil/overridetree.cb b/src/mainboard/google/zork/variants/ezkinil/overridetree.cb index 26af3942a8..5ef2f0ac77 100644 --- a/src/mainboard/google/zork/variants/ezkinil/overridetree.cb +++ b/src/mainboard/google/zork/variants/ezkinil/overridetree.cb @@ -44,6 +44,12 @@ 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 |