diff options
Diffstat (limited to 'drivers/spi/spi-fsl-spi.c')
| -rw-r--r-- | drivers/spi/spi-fsl-spi.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/drivers/spi/spi-fsl-spi.c b/drivers/spi/spi-fsl-spi.c index b906443..7eff63a 100644 --- a/drivers/spi/spi-fsl-spi.c +++ b/drivers/spi/spi-fsl-spi.c @@ -213,7 +213,8 @@ static int fsl_spi_setup_transfer(struct spi_device *spi, /* 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 > 16) && (bits_per_word != 32)) + || (bits_per_word > mpc8xxx_spi->max_bits_per_word)) return -EINVAL; if (!hz) @@ -520,6 +521,7 @@ static struct spi_master * fsl_spi_probe(struct device *dev, mpc8xxx_spi = spi_master_get_devdata(master); mpc8xxx_spi->spi_do_one_msg = fsl_spi_do_one_msg; mpc8xxx_spi->spi_remove = fsl_spi_remove; + mpc8xxx_spi->max_bits_per_word = 32; mpc8xxx_spi->type = fsl_spi_get_type(dev); ret = fsl_spi_cpm_init(mpc8xxx_spi); @@ -557,6 +559,10 @@ static struct spi_master * fsl_spi_probe(struct device *dev, /* Enable SPI interface */ regval = pdata->initial_spmode | SPMODE_INIT_VAL | SPMODE_ENABLE; + if (mpc8xxx_spi->max_bits_per_word < 8) { + regval &= ~SPMODE_LEN(0xF); + regval |= SPMODE_LEN(mpc8xxx_spi->max_bits_per_word - 1); + } if (mpc8xxx_spi->flags & SPI_QE_CPU_MODE) regval |= SPMODE_OP; |