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H Hartley Sweeten 0ffe0ce36e mtd: sst25l: fix multi-part messages with broken spi masters ... Some SPI masters (ep93xx) have limitations when using the SFRMOUT signal for the spi device chip select. The SFRMOUT signal is only asserted as long as the spi transmit fifo contains data. As soon as the last bit is clocked into the receive fifo it gets deasserted. The functions sst25l_status and sst25l_match_device use the API function spi_write_then_read to write a command to the flash then read the response back. This API function creates a two part spi message for the write then read. When this message is transferred the SFRMOUT signal ends up getting deasserted after the command phase. This causes the command to get aborted by the device so the read phase returns invalid data. By changing sst25l_status and sst25l_match_device to use a single transfer synchronous message, the SFRMOUT signal stays asserted during the entire message so the correct data always gets returned. This change will have no effect on SPI masters which use a chip select mechanism (GPIO's, etc.) which does stay asserted correctly. As a bonus, the single transfer synchronous messages complete faster than multi-part messages. Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>		15 years ago
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Kconfig	Kconfig: Remove useless and sometimes wrong comments	15 years ago
Makefile	mtd: small typo in Makefile	15 years ago
block2mtd.c	Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6	15 years ago
doc2000.c	…
doc2001.c	…
doc2001plus.c	…
docecc.c	…
docprobe.c	…
lart.c	…
m25p80.c	include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h	15 years ago
ms02-nv.c	…
ms02-nv.h	…
mtd_dataflash.c	mtd: fix memory leak in mtd_dataflash	16 years ago
mtdram.c	…
phram.c	phram: cleanup error handling and associated messages	16 years ago
pmc551.c	mtd: Remove unnecessary comparisons with MAX_MTD_DEVICES	15 years ago
slram.c	tree-wide: fix assorted typos all over the place	15 years ago
sst25l.c	mtd: sst25l: fix multi-part messages with broken spi masters	15 years ago