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b3d023b405
CONFIG_SPI does not exist in Kconfig in the first place, so the
dependency "depends on DM && SPI" is never met, i.e., DM_SPI_FLASH
can never be enabled (unless you ignore the dependency in an illegal
way. See below.)
Actually, some defconfigs such as socfpga_*_defconfig define
CONFIG_DM_SPI_FLASH=y, but it never appears in the .config file
because of this wrong dependency.
On the other hand, all the Tegra boards enable DM_SPI_FLASH because
config DM_SPI_FLASH
default y
silently ignores the dependency.
Unfortunately, this style of CONFIG definition is abused everywhere
in U-Boot, so we easily miss such a wrong dependency.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Acked-by: Simon Glass <sjg@chromium.org>
15 lines
658 B
Plaintext
15 lines
658 B
Plaintext
config DM_SPI_FLASH
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bool "Enable Driver Model for SPI flash"
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depends on DM && DM_SPI
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help
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Enable driver model for SPI flash. This SPI flash interface
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(spi_flash_probe(), spi_flash_write(), etc.) is then
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implemented by the SPI flash uclass. There is one standard
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SPI flash driver which knows how to probe most chips
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supported by U-Boot. The uclass interface is defined in
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include/spi_flash.h, but is currently fully compatible
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with the old interface to avoid confusion and duplication
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during the transition parent. SPI and SPI flash must be
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enabled together (it is not possible to use driver model
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for one and not the other).
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