sandbox: Move CONFIG_SPI_FLASH_SANDBOX to Kconfig
Move this over to Kconfig and tidy up.
Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/drivers/mtd/spi/Kconfig b/drivers/mtd/spi/Kconfig
index fd2d7ac..ac6d09f 100644
--- a/drivers/mtd/spi/Kconfig
+++ b/drivers/mtd/spi/Kconfig
@@ -12,3 +12,13 @@
during the transition parent. SPI and SPI flash must be
enabled together (it is not possible to use driver model
for one and not the other).
+
+config SPI_FLASH_SANDBOX
+ bool "Support sandbox SPI flash device"
+ depends on SANDBOX && DM_SPI_FLASH
+ help
+ Since sandbox cannot access real devices, an emulation mechanism is
+ provided instead. Drivers can be connected up to the sandbox SPI
+ bus (see CONFIG_SANDBOX_SPI) and SPI traffic will be routed to this
+ device. Typically the contents of the emulated SPI flash device is
+ stored in a file on the host filesystem.