diff options
| author | Andreas Larsson <andreas@gaisler.com> | 2013-02-15 19:52:23 +0400 |
|---|---|---|
| committer | Grant Likely <grant.likely@secretlab.ca> | 2013-04-07 13:07:55 +0400 |
| commit | b48c4e3c944e8c52dcb0f477e9d80da045c7cab4 (patch) | |
| tree | eff07b425dbacd77730328b7ca8cdd69670ea052 /drivers/spi | |
| parent | f482cd0ff506cd74c75edceec4b737c46c60cb12 (diff) | |
| download | linux-b48c4e3c944e8c52dcb0f477e9d80da045c7cab4.tar.xz | |
spi/spi-fsl-spi: Move setting non-zero tx and rx shifts to a function accessed by a function pointer
Acked-by: Anton Vorontsov <anton@enomsg.org>
Signed-off-by: Andreas Larsson <andreas@gaisler.com>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Diffstat (limited to 'drivers/spi')
| -rw-r--r-- | drivers/spi/spi-fsl-lib.h | 5 | ||||
| -rw-r--r-- | drivers/spi/spi-fsl-spi.c | 51 |
2 files changed, 36 insertions, 20 deletions
diff --git a/drivers/spi/spi-fsl-lib.h b/drivers/spi/spi-fsl-lib.h index d785595c206e..eae54b666907 100644 --- a/drivers/spi/spi-fsl-lib.h +++ b/drivers/spi/spi-fsl-lib.h @@ -69,6 +69,11 @@ struct mpc8xxx_spi { unsigned int flags; +#ifdef CONFIG_SPI_FSL_SPI + void (*set_shifts)(u32 *rx_shift, u32 *tx_shift, + int bits_per_word, int msb_first); +#endif + struct workqueue_struct *workqueue; struct work_struct work; diff --git a/drivers/spi/spi-fsl-spi.c b/drivers/spi/spi-fsl-spi.c index 1569f7defc73..aba00fd0791f 100644 --- a/drivers/spi/spi-fsl-spi.c +++ b/drivers/spi/spi-fsl-spi.c @@ -91,6 +91,25 @@ static void fsl_spi_chipselect(struct spi_device *spi, int value) } } +static void fsl_spi_qe_cpu_set_shifts(u32 *rx_shift, u32 *tx_shift, + int bits_per_word, int msb_first) +{ + *rx_shift = 0; + *tx_shift = 0; + if (msb_first) { + if (bits_per_word <= 8) { + *rx_shift = 16; + *tx_shift = 24; + } else if (bits_per_word <= 16) { + *rx_shift = 16; + *tx_shift = 16; + } + } else { + if (bits_per_word <= 8) + *rx_shift = 8; + } +} + static int mspi_apply_cpu_mode_quirks(struct spi_mpc8xxx_cs *cs, struct spi_device *spi, struct mpc8xxx_spi *mpc8xxx_spi, @@ -101,31 +120,20 @@ static int mspi_apply_cpu_mode_quirks(struct spi_mpc8xxx_cs *cs, if (bits_per_word <= 8) { cs->get_rx = mpc8xxx_spi_rx_buf_u8; cs->get_tx = mpc8xxx_spi_tx_buf_u8; - if (mpc8xxx_spi->flags & SPI_QE_CPU_MODE) { - cs->rx_shift = 16; - cs->tx_shift = 24; - } } else if (bits_per_word <= 16) { cs->get_rx = mpc8xxx_spi_rx_buf_u16; cs->get_tx = mpc8xxx_spi_tx_buf_u16; - if (mpc8xxx_spi->flags & SPI_QE_CPU_MODE) { - cs->rx_shift = 16; - cs->tx_shift = 16; - } } else if (bits_per_word <= 32) { cs->get_rx = mpc8xxx_spi_rx_buf_u32; cs->get_tx = mpc8xxx_spi_tx_buf_u32; } else return -EINVAL; - if (mpc8xxx_spi->flags & SPI_QE_CPU_MODE && - spi->mode & SPI_LSB_FIRST) { - cs->tx_shift = 0; - if (bits_per_word <= 8) - cs->rx_shift = 8; - else - cs->rx_shift = 0; - } + if (mpc8xxx_spi->set_shifts) + mpc8xxx_spi->set_shifts(&cs->rx_shift, &cs->tx_shift, + bits_per_word, + !(spi->mode & SPI_LSB_FIRST)); + mpc8xxx_spi->rx_shift = cs->rx_shift; mpc8xxx_spi->tx_shift = cs->tx_shift; mpc8xxx_spi->get_rx = cs->get_rx; @@ -487,10 +495,13 @@ static struct spi_master * fsl_spi_probe(struct device *dev, if (ret) goto err_cpm_init; - if (mpc8xxx_spi->flags & SPI_QE_CPU_MODE) { - mpc8xxx_spi->rx_shift = 16; - mpc8xxx_spi->tx_shift = 24; - } + if (mpc8xxx_spi->flags & SPI_QE_CPU_MODE) + mpc8xxx_spi->set_shifts = fsl_spi_qe_cpu_set_shifts; + + if (mpc8xxx_spi->set_shifts) + /* 8 bits per word and MSB first */ + mpc8xxx_spi->set_shifts(&mpc8xxx_spi->rx_shift, + &mpc8xxx_spi->tx_shift, 8, 1); mpc8xxx_spi->reg_base = ioremap(mem->start, resource_size(mem)); if (mpc8xxx_spi->reg_base == NULL) { |