diff options
Diffstat (limited to 'drivers/spi')
| -rw-r--r-- | drivers/spi/spi-orion.c | 25 |
1 files changed, 24 insertions, 1 deletions
diff --git a/drivers/spi/spi-orion.c b/drivers/spi/spi-orion.c index b17c09cf0a0..011186d570f 100644 --- a/drivers/spi/spi-orion.c +++ b/drivers/spi/spi-orion.c @@ -32,8 +32,12 @@ #define ORION_SPI_DATA_IN_REG 0x0c #define ORION_SPI_INT_CAUSE_REG 0x10 +#define ORION_SPI_MODE_CPOL (1 << 11) +#define ORION_SPI_MODE_CPHA (1 << 12) #define ORION_SPI_IF_8_16_BIT_MODE (1 << 5) #define ORION_SPI_CLK_PRESCALE_MASK 0x1F +#define ORION_SPI_MODE_MASK (ORION_SPI_MODE_CPOL | \ + ORION_SPI_MODE_CPHA) struct orion_spi { struct spi_master *master; @@ -123,6 +127,23 @@ static int orion_spi_baudrate_set(struct spi_device *spi, unsigned int speed) return 0; } +static void +orion_spi_mode_set(struct spi_device *spi) +{ + u32 reg; + struct orion_spi *orion_spi; + + orion_spi = spi_master_get_devdata(spi->master); + + reg = readl(spi_reg(orion_spi, ORION_SPI_IF_CONFIG_REG)); + reg &= ~ORION_SPI_MODE_MASK; + if (spi->mode & SPI_CPOL) + reg |= ORION_SPI_MODE_CPOL; + if (spi->mode & SPI_CPHA) + reg |= ORION_SPI_MODE_CPHA; + writel(reg, spi_reg(orion_spi, ORION_SPI_IF_CONFIG_REG)); +} + /* * called only when no transfer is active on the bus */ @@ -142,6 +163,8 @@ orion_spi_setup_transfer(struct spi_device *spi, struct spi_transfer *t) if ((t != NULL) && t->bits_per_word) bits_per_word = t->bits_per_word; + orion_spi_mode_set(spi); + rc = orion_spi_baudrate_set(spi, speed); if (rc) return rc; @@ -399,7 +422,7 @@ static int __init orion_spi_probe(struct platform_device *pdev) } /* we support only mode 0, and no options */ - master->mode_bits = 0; + master->mode_bits = SPI_CPHA | SPI_CPOL; master->setup = orion_spi_setup; master->transfer_one_message = orion_spi_transfer_one_message; |