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authorRob Barnes <robbarnes@google.com>2020-10-01 15:17:27 -0600
committerPatrick Georgi <pgeorgi@google.com>2020-10-12 08:36:53 +0000
commit8d67da6b0d46f5a77285b404dc1f9e41117f5ab0 (patch)
treed4b8705803265fb6fbb6eb7bf0c533f1639477c4 /src/mainboard/google
parent30f583264d0e9154804cbcdfd8c65518f5e3560f (diff)
downloadcoreboot-8d67da6b0d46f5a77285b404dc1f9e41117f5ab0.tar.xz
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>
Diffstat (limited to 'src/mainboard/google')
-rw-r--r--src/mainboard/google/zork/variants/vilboz/overridetree.cb6
1 files changed, 6 insertions, 0 deletions
diff --git a/src/mainboard/google/zork/variants/vilboz/overridetree.cb b/src/mainboard/google/zork/variants/vilboz/overridetree.cb
index 3d9ff7c01b..b75beafa34 100644
--- a/src/mainboard/google/zork/variants/vilboz/overridetree.cb
+++ b/src/mainboard/google/zork/variants/vilboz/overridetree.cb
@@ -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