From 8d67da6b0d46f5a77285b404dc1f9e41117f5ab0 Mon Sep 17 00:00:00 2001 From: Rob Barnes Date: Thu, 1 Oct 2020 15:17:27 -0600 Subject: 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 Change-Id: I9a1e47dbee3fcc7317857d40c5418be30d755d61 Reviewed-on: https://review.coreboot.org/c/coreboot/+/45933 Reviewed-by: Martin Roth Tested-by: build bot (Jenkins) --- src/mainboard/google/zork/variants/vilboz/overridetree.cb | 6 ++++++ 1 file changed, 6 insertions(+) (limited to 'src/mainboard/google/zork') 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 -- cgit v1.2.3