From cada76333f4d703707d325d65756026bbf5db115 Mon Sep 17 00:00:00 2001 From: Raul E Rangel Date: Tue, 29 Sep 2020 14:20:48 -0600 Subject: mb/google/zork/ezkinil: 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 Ezkinil w/ eMMC to OS. Signed-off-by: Raul E Rangel Change-Id: Ida0bbf9bd772ab7d384d5d097fa3b02b846a3efa Reviewed-on: https://review.coreboot.org/c/coreboot/+/45852 Reviewed-by: Furquan Shaikh Reviewed-by: Martin Roth Reviewed-by: Eric Peers Reviewed-by: Paul Fagerburg Reviewed-by: Rob Barnes Tested-by: build bot (Jenkins) --- src/mainboard/google/zork/variants/ezkinil/overridetree.cb | 6 ++++++ 1 file changed, 6 insertions(+) (limited to 'src/mainboard') diff --git a/src/mainboard/google/zork/variants/ezkinil/overridetree.cb b/src/mainboard/google/zork/variants/ezkinil/overridetree.cb index 26af3942a8..5ef2f0ac77 100644 --- a/src/mainboard/google/zork/variants/ezkinil/overridetree.cb +++ b/src/mainboard/google/zork/variants/ezkinil/overridetree.cb @@ -44,6 +44,12 @@ 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