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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>
This commit is contained in:
Esben Haabendal 2018-06-20 09:34:42 +02:00 committed by Mark Brown
parent 35c9d461a4
commit 3e7cc6252d
No known key found for this signature in database
GPG Key ID: 24D68B725D5487D0
1 changed files with 3 additions and 1 deletions
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4
drivers/spi/spi-fsl-dspi.c
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@ -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),