diff options
| author | Rob Barnes <robbarnes@google.com> | 2020-10-01 15:16:39 -0600 |
|---|---|---|
| committer | Patrick Georgi <pgeorgi@google.com> | 2020-10-12 08:37:28 +0000 |
| commit | 4e86131462786f3a9898d90cfa1602b1e157bb5c (patch) | |
| tree | 18c9dd086b113d73e1ca8e058fc4acaf5bffea2a /src/mainboard/google/zork | |
| parent | c4a5acdabc28778b49a1c088b0736bac83e2ab51 (diff) | |
mb/google/zork/dirinboz: 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 dirinboz, run integrity test, b:169940185
BRANCH=zork
Signed-off-by: Rob Barnes <robbarnes@google.com>
Change-Id: I6bac8284b67070ff2c5838257f4ae2ead0e69c22
Reviewed-on: https://review.coreboot.org/c/coreboot/+/45934
Reviewed-by: Martin Roth <martinroth@google.com>
Reviewed-by: Marshall Dawson <marshalldawson3rd@gmail.com>
Reviewed-by: Sam McNally <sammc@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Diffstat (limited to 'src/mainboard/google/zork')
| -rw-r--r-- | src/mainboard/google/zork/variants/dirinboz/overridetree.cb | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/src/mainboard/google/zork/variants/dirinboz/overridetree.cb b/src/mainboard/google/zork/variants/dirinboz/overridetree.cb index 905bc886e9..a11fa5e4c7 100644 --- a/src/mainboard/google/zork/variants/dirinboz/overridetree.cb +++ b/src/mainboard/google/zork/variants/dirinboz/overridetree.cb @@ -36,6 +36,12 @@ 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 |