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authorFurquan Shaikh <furquan@chromium.org>2016-11-20 21:04:00 -0800
committerFurquan Shaikh <furquan@google.com>2016-11-22 17:32:09 +0100
commitc28984d9ea08e7d995ef9fc8064c10ec0c0d9d77 (patch)
treec113582c3d2d8fb8d54a4c9a53375340fcc302d5 /src/drivers/spi/Kconfig
parent282c8322791800ee0d732fdaa5eb2cd8f7effd58 (diff)
downloadcoreboot-c28984d9ea08e7d995ef9fc8064c10ec0c0d9d77.tar.xz
spi: Clean up SPI flash driver interface
RW flag was added to spi_slave structure to get around a requirement on some AMD flash controllers that need to group together all spi volatile operations (write/erase). This rw flag is not a property or attribute of the SPI slave or controller. Thus, instead of saving it in spi_slave structure, clean up the SPI flash driver interface. This allows chipsets/mainboards (that require volatile operations to be grouped) to indicate beginning and end of such grouped operations. New user APIs are added to allow users to perform probe, read, write, erase, volatile group begin and end operations. Callbacks defined in spi_flash structure are expected to be used only by the SPI flash driver. Any chipset that requires grouping of volatile operations can select the newly added Kconfig option SPI_FLASH_HAS_VOLATILE_GROUP and define callbacks for chipset_volatile_group_{begin,end}. spi_claim_bus/spi_release_bus calls have been removed from the SPI flash chip drivers which end up calling do_spi_flash_cmd since it already has required calls for claiming and releasing SPI bus before performing a read/write operation. BUG=None BRANCH=None TEST=Compiles successfully. Change-Id: Idfc052e82ec15b6c9fa874cee7a61bd06e923fbf Signed-off-by: Furquan Shaikh <furquan@chromium.org> Reviewed-on: https://review.coreboot.org/17462 Tested-by: build bot (Jenkins) Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Diffstat (limited to 'src/drivers/spi/Kconfig')
-rw-r--r--src/drivers/spi/Kconfig7
1 files changed, 7 insertions, 0 deletions
diff --git a/src/drivers/spi/Kconfig b/src/drivers/spi/Kconfig
index 4c2fd1f060..b55de58962 100644
--- a/src/drivers/spi/Kconfig
+++ b/src/drivers/spi/Kconfig
@@ -164,6 +164,13 @@ config SPI_FLASH_FAST_READ_DUAL_OUTPUT_3B
output command (opcode 0x3b) where the opcode and address are sent
to the chip on MOSI and data is received on both MOSI and MISO.
+config SPI_FLASH_HAS_VOLATILE_GROUP
+ bool
+ default n
+ help
+ Allows chipset to group write/erase operations under a single volatile
+ group.
+
endif # SPI_FLASH
config HAVE_SPI_CONSOLE_SUPPORT