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spi: rspi: Add support for specifying CPHA/CPOL 

Add support for specifying the SPI clock phase and polarity, based on the
SDK reference code.

Signed-off-by: Geert Uytterhoeven <geert+renesas@linux-m68k.org>
Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Mark Brown <broonie@linaro.org>
This commit is contained in:
Geert Uytterhoeven 2014-01-12 11:27:43 +01:00 committed by Mark Brown
parent fbe5072bbe
commit 348e5153bc
1 changed files with 10 additions and 2 deletions
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12
drivers/spi/spi-rspi.c
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@ -187,6 +187,7 @@ struct rspi_data {
spinlock_t lock;
struct clk *clk;
u8 spsr;
u16 spcmd;
const struct spi_ops *ops;
/* for dmaengine */
@ -261,7 +262,7 @@ static int rspi_set_config_register(const struct rspi_data *rspi,
rspi_write8(rspi, 0x00, RSPI_SPCR2);
/* Sets SPCMD */
rspi_write16(rspi, SPCMD_SPB_8_TO_16(access_size) | SPCMD_SSLKP,
rspi_write16(rspi, SPCMD_SPB_8_TO_16(access_size) | rspi->spcmd,
RSPI_SPCMD0);
/* Sets RSPI mode */
@ -302,7 +303,7 @@ static int qspi_set_config_register(const struct rspi_data *rspi,
else if (access_size == 32)
spcmd = SPCMD_SPB_32BIT;
spcmd |= SPCMD_SCKDEN | SPCMD_SLNDEN | SPCMD_SSLKP | SPCMD_SPNDEN;
spcmd |= SPCMD_SCKDEN | SPCMD_SLNDEN | rspi->spcmd | SPCMD_SPNDEN;
/* Resets transfer data length */
rspi_write32(rspi, 0, QSPI_SPBMUL0);
@ -805,6 +806,12 @@ static int rspi_setup(struct spi_device *spi)
spi->bits_per_word = 8;
rspi->max_speed_hz = spi->max_speed_hz;
rspi->spcmd = SPCMD_SSLKP;
if (spi->mode & SPI_CPOL)
rspi->spcmd |= SPCMD_CPOL;
if (spi->mode & SPI_CPHA)
rspi->spcmd |= SPCMD_CPHA;
set_config_register(rspi, 8);
return 0;
@ -996,6 +1003,7 @@ static int rspi_probe(struct platform_device *pdev)
master->setup = rspi_setup;
master->transfer = rspi_transfer;
master->cleanup = rspi_cleanup;
master->mode_bits = SPI_CPHA | SPI_CPOL;
ret = request_irq(irq, rspi_irq, 0, dev_name(&pdev->dev), rspi);
if (ret < 0) {