]> pilppa.com Git - linux-2.6-omap-h63xx.git/commit
Blackfin SPI Driver: Add GPIO controlled SPI Slave Select support
authorMichael Hennerich <michael.hennerich@analog.com>
Tue, 7 Apr 2009 02:00:51 +0000 (19:00 -0700)
committerLinus Torvalds <torvalds@linux-foundation.org>
Tue, 7 Apr 2009 15:31:06 +0000 (08:31 -0700)
commit42c78b2bf51bafb4cfa98dfecc28dd9b8bcd04b0
tree12960b010ec28ff6e5cfeb4a640681464781f51e
parente7d02e3c9577f070bc77354763bed7f24713dc53
Blackfin SPI Driver: Add GPIO controlled SPI Slave Select support

Add support for GPIO controlled SPI Chip Selects.  To make use of this
feature, set chip_select = 0 and add a proper cs_gpio to your
controller_data.

struct spi_board_info
        .chip_select = 0

struct bfin5xx_spi_chip
        .cs_gpio = GPIO_P###

There are various SPI devices that require SPI MODE_0, and need to have
the Chip Selects asserted during the entire transfer.  Consider using
SPI_MODE_3 (SPI_CPHA | SPI_CPOL) if your device allows it.

Signed-off-by: Michael Hennerich <michael.hennerich@analog.com>
Signed-off-by: Bryan Wu <cooloney@kernel.org>
Cc: David Brownell <david-b@pacbell.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
arch/blackfin/include/asm/bfin5xx_spi.h
drivers/spi/spi_bfin5xx.c