diff options
| author |   Geert Uytterhoeven <geert+renesas@linux-m68k.org> | 2014-01-12 11:27:43 +0100 |
|---|---|---|
| committer |   Mark Brown <broonie@linaro.org> | 2014-01-13 17:24:04 +0000 |
| commit | 348e5153bcf6c6a0a735eeb6f65e1aba8ffe2780 (patch) | |
| tree | a61802a8d43b1b2654061d3fafb3a546a168f028 /drivers/spi | |
| parent | spi: rspi: Add more QSPI register documentation (diff) | |
| download | linux-dev-348e5153bcf6c6a0a735eeb6f65e1aba8ffe2780.tar.xz linux-dev-348e5153bcf6c6a0a735eeb6f65e1aba8ffe2780.zip | |
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>
Diffstat (limited to 'drivers/spi')
| -rw-r--r-- | drivers/spi/spi-rspi.c | 12 |
1 files changed, 10 insertions, 2 deletions
diff --git a/drivers/spi/spi-rspi.c b/drivers/spi/spi-rspi.c index 4a2c7592b5eb..c3227fb44b03 100644 --- a/drivers/spi/spi-rspi.c +++ b/drivers/spi/spi-rspi.c @@ -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) { |