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spi: omap-uwire: Convert to use bits_per_word_mask 

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

Signed-off-by: Axel Lin <axel.lin@ingics.com>
Signed-off-by: Mark Brown <broonie@linaro.org>
This commit is contained in:
Axel Lin 2014-02-15 14:26:21 +08:00 committed by Mark Brown
parent 354312f16e
commit 790fc55a77
1 changed files with 2 additions and 16 deletions
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18
drivers/spi/spi-omap-uwire.c
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@ -99,7 +99,6 @@ struct uwire_spi {
};
struct uwire_state {
unsigned bits_per_word;
unsigned div1_idx;
};
@ -210,9 +209,8 @@ static void uwire_chipselect(struct spi_device *spi, int value)
static int uwire_txrx(struct spi_device *spi, struct spi_transfer *t)
{
struct uwire_state *ust = spi->controller_state;
unsigned len = t->len;
unsigned bits = ust->bits_per_word;
unsigned bits = t->bits_per_word ? : spi->bits_per_word;
unsigned bytes;
u16 val, w;
int status = 0;
@ -322,7 +320,6 @@ static int uwire_setup_transfer(struct spi_device *spi, struct spi_transfer *t)
struct uwire_state *ust = spi->controller_state;
struct uwire_spi *uwire;
unsigned flags = 0;
unsigned bits;
unsigned hz;
unsigned long rate;
int div1_idx;
@ -332,17 +329,6 @@ static int uwire_setup_transfer(struct spi_device *spi, struct spi_transfer *t)
uwire = spi_master_get_devdata(spi->master);
bits = spi->bits_per_word;
if (t != NULL && t->bits_per_word)
bits = t->bits_per_word;
if (bits > 16) {
pr_debug("%s: wordsize %d?\n", dev_name(&spi->dev), bits);
status = -ENODEV;
goto done;
}
ust->bits_per_word = bits;
/* mode 0..3, clock inverted separately;
* standard nCS signaling;
* don't treat DI=high as "not ready"
@ -509,7 +495,7 @@ static int uwire_probe(struct platform_device *pdev)
/* the spi->mode bits understood by this driver: */
master->mode_bits = SPI_CPOL | SPI_CPHA | SPI_CS_HIGH;
master->bits_per_word_mask = SPI_BPW_RANGE_MASK(1, 16);
master->flags = SPI_MASTER_HALF_DUPLEX;
master->bus_num = 2; /* "official" */