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Kconfig: lay groundwork for not assuming SPI flash boot device

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Almost all boards and chipsets within the codebase assume or
use SPI flash as the boot device. Therefore, provide an option
for the boards/chipsets which don't currently support SPI flash
as the boot device. The default is to assume SPI flash is the
boot device unless otherwise instructed. This falls in line
with the current assumptions, but it also allows one to
differentiate a platform desiring SPI flash support while it not
being the actual boot device.

One thing to note is that while google/daisy does boot with SPI
flash part no SPI API interfaces were ever implemented. Therefore,
mark that board as not having a SPI boot device.

BUG=chrome-os-partner:56151

Change-Id: Id4e0b4ec5e440e41421fbb6d0ca2be4185b62a6e
Signed-off-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-on: https://review.coreboot.org/16191
Tested-by: build bot (Jenkins)
Reviewed-by: Furquan Shaikh <furquan@google.com>
This commit is contained in:
Aaron Durbin
2016-08-11 11:02:26 -05:00
committed by Martin Roth
parent 2d97cb1be5
commit 4a36c4e9fc
9 changed files with 20 additions and 0 deletions
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src/drivers/spi/Kconfig
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@@ -15,6 +15,7 @@
config SPI_FLASH
bool
default y if BOOT_DEVICE_SPI_FLASH
default n
help
Select this option if your chipset driver needs to store certain