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spi: fsl-spi: Convert to let spi core validate xfer->bits_per_word

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Set bits_per_word_mask so spi core will reject transfers that attempt to use
an unsupported bits_per_word value.

fsl_spi_grlib_probe() may update mpc8xxx_spi->max_bits_per_word setting.
So set master->bits_per_word_mask after fsl_spi_grlib_probe().

Signed-off-by: Axel Lin <axel.lin@ingics.com>
Signed-off-by: Mark Brown <broonie@linaro.org>
This commit is contained in:
Axel Lin 2014-02-13 19:05:38 +08:00 committed by Mark Brown
parent 4302a59629
commit f734394d86
1 changed files with 4 additions and 6 deletions
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10
drivers/spi/spi-fsl-spi.c
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@ -239,12 +239,6 @@ static int fsl_spi_setup_transfer(struct spi_device *spi,
if (!bits_per_word)
bits_per_word = spi->bits_per_word;
/* Make sure its a bit width we support [4..16, 32] */
if ((bits_per_word < 4)
|| ((bits_per_word > 16) && (bits_per_word != 32))
|| (bits_per_word > mpc8xxx_spi->max_bits_per_word))
return -EINVAL;
if (!hz)
hz = spi->max_speed_hz;
@ -651,6 +645,10 @@ static struct spi_master * fsl_spi_probe(struct device *dev,
if (mpc8xxx_spi->type == TYPE_GRLIB)
fsl_spi_grlib_probe(dev);
master->bits_per_word_mask =
(SPI_BPW_RANGE_MASK(4, 16) | SPI_BPW_MASK(32)) &
SPI_BPW_RANGE_MASK(1, mpc8xxx_spi->max_bits_per_word);
if (mpc8xxx_spi->flags & SPI_QE_CPU_MODE)
mpc8xxx_spi->set_shifts = fsl_spi_qe_cpu_set_shifts;