commit c29340df3ca3669801cbdf8a04ab311fcd714f4a
author Martin Roth <gaumless@gmail.com> Fri Jan 13 22:05:59 2023 -0700
committer Elyes Haouas <ehaouas@noos.fr> Tue Jan 17 15:02:21 2023 +0000
tree d288cb0a5b78e2059aa751051fb44ae800477c59
parent 7d1995cc6851e0287562c31d94420d5ab85e5ef9

mb/google/skyrim: Set winterhold SPI fast read speed to 100MHz

Winterhold runs with the SPI fast read speed set to 100MHz.  This
decreases boot time by roughly 100ms.

BUG=None
TEST=Examine boot times.

Signed-off-by: Martin Roth <gaumless@gmail.com>
Change-Id: I879e17fb0212910c7f90ba0e78ee16bea8b7cffa
Reviewed-on: https://review.coreboot.org/c/coreboot/+/71888
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Eric Lai <eric_lai@quanta.corp-partner.google.com>
Reviewed-by: Matt DeVillier <matt.devillier@amd.corp-partner.google.com>

src/mainboard/google/skyrim/Kconfig

diff --git a/src/mainboard/google/skyrim/Kconfig b/src/mainboard/google/skyrim/Kconfig
index d89d290..bbcb54b 100644
--- a/src/mainboard/google/skyrim/Kconfig
+++ b/src/mainboard/google/skyrim/Kconfig
@@ -125,6 +125,7 @@
 	default 4                                 # Dual IO (1-2-2)
 
 config EFS_SPI_SPEED
+	default 4 if BOARD_GOOGLE_WINTERHOLD
 	default 0	# 66MHz
 
 config EFS_SPI_MICRON_FLAG
@@ -134,6 +135,7 @@
 	default 1	# 33MHz
 
 config ALT_SPI_SPEED
+	default 4 if BOARD_GOOGLE_WINTERHOLD
 	default 0	# 66MHz
 
 endif # !EM100