From c4a5acdabc28778b49a1c088b0736bac83e2ab51 Mon Sep 17 00:00:00 2001 From: Rob Barnes Date: Thu, 1 Oct 2020 15:15:32 -0600 Subject: 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 Change-Id: I1191d73a2a3f72f99de187a946162460acbb287a Reviewed-on: https://review.coreboot.org/c/coreboot/+/45935 Reviewed-by: Martin Roth Tested-by: build bot (Jenkins) --- src/mainboard/google/zork/variants/dalboz/overridetree.cb | 6 ++++++ 1 file changed, 6 insertions(+) (limited to 'src') 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 -- cgit v1.2.3