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spi: move more spi_setup() functionality into core

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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>
This commit is contained in:
David Brownell
2009-06-17 16:26:04 -07:00
committed by Linus Torvalds
parent 7d0771970c
commit e7db06b5d5
16 changed files with 57 additions and 115 deletions
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9
drivers/spi/orion_spi.c
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@@ -358,12 +358,6 @@ static int orion_spi_setup(struct spi_device *spi)
orion_spi = spi_master_get_devdata(spi->master);
if (spi->mode) {
dev_err(&spi->dev, "setup: unsupported mode bits %x\n",
spi->mode);
return -EINVAL;
}
/* Fix ac timing if required. */
if (orion_spi->spi_info->enable_clock_fix)
orion_spi_setbits(orion_spi, ORION_SPI_IF_CONFIG_REG,
@@ -473,6 +467,9 @@ static int __init orion_spi_probe(struct platform_device *pdev)
if (pdev->id != -1)
master->bus_num = pdev->id;
/* we support only mode 0, and no options */
master->mode_bits = 0;
master->setup = orion_spi_setup;
master->transfer = orion_spi_transfer;
master->num_chipselect = ORION_NUM_CHIPSELECTS;