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Unverified Commit 3e7cc625 authored by Esben Haabendal's avatar Esben Haabendal Committed by Mark Brown
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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: default avatarEsben Haabendal <eha@deif.com>
Acked-by: default avatarMartin Hundebøll <martin@geanix.com>
Signed-off-by: default avatarMark Brown <broonie@kernel.org>
parent 35c9d461

drivers/spi/spi-fsl-dspi.c

+3 −1
Original line number Diff line number Diff line
@@ -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),