coreboot-kgpe-d16/src/mainboard/google/nyan_blaze
Gabe Black 92dfa9c581 nyan*: Reduce the EC SPI bus frequency to 3 MHz.
The EC doesn't seem to be able to handle its bus running at 4 MHz or higher.
To avoid it not being able to keep up, we reduce the frequency of that bus on
all nyan derivatives to 3 MHz. Because PLLP can't be divided that low, we
switch the clock source to CLKM.

BUG=chrome-os-partner:22849
TEST=Built and booted on nyan.
BRANCH=None

Original-Change-Id: I8f31b41098d64634427b4686f5333012f643fada
Original-Signed-off-by: Gabe Black <gabeblack@google.com>
Original-Reviewed-on: https://chromium-review.googlesource.com/193349
Original-Commit-Queue: Gabe Black <gabeblack@chromium.org>
Original-Tested-by: Gabe Black <gabeblack@chromium.org>
Original-Reviewed-by: Gabe Black <gabeblack@chromium.org>
(cherry picked from commit c215c50a5bb982b0e671c951e2fe8df06db85db2)
Signed-off-by: Marc Jones <marc.jones@se-eng.com>

Change-Id: Ia60513d118aed8881927e9d52f170e27655ea8e7
Reviewed-on: http://review.coreboot.org/7739
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
2014-12-15 19:58:43 +01:00
..
bct
boardid.c
boardid.h
bootblock.c
chromeos.c
devicetree.cb t124: Clean up display init functions 2014-11-14 07:27:17 +01:00
Kconfig
mainboard.c spi: Factor EC protocol details out of the SPI drivers. 2014-12-09 20:32:06 +01:00
Makefile.inc
pmic.c
pmic.h
romstage.c nyan*: Reduce the EC SPI bus frequency to 3 MHz. 2014-12-15 19:58:43 +01:00
sdram_configs.c
sdram_configs.h