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| author | Esben Haabendal <eha@deif.com> | 2018-06-20 09:34:42 +0200 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2018-06-20 14:48:27 +0100 |
| commit | 3e7cc6252dc81100bd2803b3148a1e59b3dfae6a (patch) | |
| tree | 6a7986a4f992525cb5b5cbaca6fd1aff6233325b /drivers/spi | |
| parent | 35c9d461a436101a31d4ece7e5de5f4df6b59a5e (diff) | |
| download | linux-3e7cc6252dc81100bd2803b3148a1e59b3dfae6a.tar.gz linux-3e7cc6252dc81100bd2803b3148a1e59b3dfae6a.tar.bz2 linux-3e7cc6252dc81100bd2803b3148a1e59b3dfae6a.zip | |
spi: spi-fsl-dspi: Enable extended SPI mode
Set the XSPI bit for devices configured for XSPI mode (currently LS1021A),
and thereby switch to extended SPI mode, allowing for SPI transfers using
from 4 to 32 bits per word instead of 4 to 16 bits per word.
Signed-off-by: Esben Haabendal <eha@deif.com>
Acked-by: Martin Hundebøll <martin@geanix.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'drivers/spi')
| -rw-r--r-- | drivers/spi/spi-fsl-dspi.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/drivers/spi/spi-fsl-dspi.c b/drivers/spi/spi-fsl-dspi.c index eed55491b2c9..1f85dcdb2203 100644 --- a/drivers/spi/spi-fsl-dspi.c +++ b/drivers/spi/spi-fsl-dspi.c @@ -46,6 +46,7 @@ #define SPI_MCR_PCSIS (0x3F << 16) #define SPI_MCR_CLR_TXF (1 << 11) #define SPI_MCR_CLR_RXF (1 << 10) +#define SPI_MCR_XSPI (1 << 3) #define SPI_TCR 0x08 #define SPI_TCR_GET_TCNT(x) (((x) & 0xffff0000) >> 16) @@ -968,7 +969,8 @@ static const struct regmap_config dspi_xspi_regmap_config[] = { static void dspi_init(struct fsl_dspi *dspi) { - regmap_write(dspi->regmap, SPI_MCR, SPI_MCR_MASTER | SPI_MCR_PCSIS); + regmap_write(dspi->regmap, SPI_MCR, SPI_MCR_MASTER | SPI_MCR_PCSIS | + (dspi->devtype_data->xspi_mode ? SPI_MCR_XSPI : 0)); regmap_write(dspi->regmap, SPI_SR, SPI_SR_CLEAR); if (dspi->devtype_data->xspi_mode) regmap_write(dspi->regmap, SPI_CTARE(0), |