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authorRob Barnes <robbarnes@google.com>2020-10-01 15:15:32 -0600
committerPatrick Georgi <pgeorgi@google.com>2020-10-12 08:37:07 +0000
commitc4a5acdabc28778b49a1c088b0736bac83e2ab51 (patch)
tree1bf064ccf8e482697e246590439651e17b1d6c2f /src/mainboard/google
parentd9352e69db7197a83362a2cdd2a1aa5660d46530 (diff)
downloadcoreboot-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.cb6
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