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authorDavid Brownell <dbrownell@users.sourceforge.net>2009-06-17 23:26:04 (GMT)
committerLinus Torvalds <torvalds@linux-foundation.org>2009-06-18 20:03:42 (GMT)
commite7db06b5d5afcef15c4c3e61c3a7441ed7ad1407 (patch)
treec0d1e01d49fdb3f288da28ffc3b349810c4e1b61 /drivers/spi/au1550_spi.c
parent7d0771970c51e736758525dd71fb82dd036b823a (diff)
downloadlinux-e7db06b5d5afcef15c4c3e61c3a7441ed7ad1407.tar.xz
spi: move more spi_setup() functionality into core
Move some common spi_setup() error checks into the SPI framework from the spi_master controller drivers: - Add a new "mode_bits" field to spi_master - Use that in spi_setup to validate the spi->mode value being requested. Setting this new field is now mandatory for any controller supporting more than vanilla SPI_MODE_0. - Update all spi_master drivers to: * Initialize that field * Remove current spi_setup() checks using that value. This is a net minor code shrink. Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/spi/au1550_spi.c')
-rw-r--r--drivers/spi/au1550_spi.c12
1 files changed, 3 insertions, 9 deletions
diff --git a/drivers/spi/au1550_spi.c b/drivers/spi/au1550_spi.c
index 6a407e6..76cbc1a 100644
--- a/drivers/spi/au1550_spi.c
+++ b/drivers/spi/au1550_spi.c
@@ -284,9 +284,6 @@ static int au1550_spi_setupxfer(struct spi_device *spi, struct spi_transfer *t)
return 0;
}
-/* the spi->mode bits understood by this driver: */
-#define MODEBITS (SPI_CPOL | SPI_CPHA | SPI_CS_HIGH | SPI_LSB_FIRST)
-
static int au1550_spi_setup(struct spi_device *spi)
{
struct au1550_spi *hw = spi_master_get_devdata(spi->master);
@@ -297,12 +294,6 @@ static int au1550_spi_setup(struct spi_device *spi)
return -EINVAL;
}
- if (spi->mode & ~MODEBITS) {
- dev_dbg(&spi->dev, "setup: unsupported mode bits %x\n",
- spi->mode & ~MODEBITS);
- return -EINVAL;
- }
-
if (spi->max_speed_hz == 0)
spi->max_speed_hz = hw->freq_max;
if (spi->max_speed_hz > hw->freq_max
@@ -779,6 +770,9 @@ static int __init au1550_spi_probe(struct platform_device *pdev)
goto err_nomem;
}
+ /* the spi->mode bits understood by this driver: */
+ master->mode_bits = SPI_CPOL | SPI_CPHA | SPI_CS_HIGH | SPI_LSB_FIRST;
+
hw = spi_master_get_devdata(master);
hw->master = spi_master_get(master);