diff options
Diffstat (limited to 'drivers/spi/bfin_spi.c')
| -rw-r--r-- | drivers/spi/bfin_spi.c | 13 |
1 files changed, 11 insertions, 2 deletions
diff --git a/drivers/spi/bfin_spi.c b/drivers/spi/bfin_spi.c index 2a72f99..f28d42b 100644 --- a/drivers/spi/bfin_spi.c +++ b/drivers/spi/bfin_spi.c @@ -85,6 +85,7 @@ struct spi_slave *spi_setup_slave(unsigned int bus, unsigned int cs, unsigned int max_hz, unsigned int mode) { struct bfin_spi_slave *bss; + ulong sclk; u32 mmr_base; u32 baud; @@ -105,7 +106,11 @@ struct spi_slave *spi_setup_slave(unsigned int bus, unsigned int cs, default: return NULL; } - baud = get_sclk() / (2 * max_hz); + sclk = get_sclk(); + baud = sclk / (2 * max_hz); + /* baud should be rounded up */ + if (sclk % (2 * max_hz)) + baud += 1; if (baud < 2) baud = 2; else if (baud > (u16)-1) @@ -314,6 +319,10 @@ void spi_release_bus(struct spi_slave *slave) SSYNC(); } +#ifndef CONFIG_BFIN_SPI_IDLE_VAL +# define CONFIG_BFIN_SPI_IDLE_VAL 0xff +#endif + int spi_xfer(struct spi_slave *slave, unsigned int bitlen, const void *dout, void *din, unsigned long flags) { @@ -340,7 +349,7 @@ int spi_xfer(struct spi_slave *slave, unsigned int bitlen, const void *dout, /* todo: take advantage of hardware fifos and setup RX dma */ while (bytes--) { - u8 value = (tx ? *tx++ : 0); + u8 value = (tx ? *tx++ : CONFIG_BFIN_SPI_IDLE_VAL); debug("%s: tx:%x ", __func__, value); write_SPI_TDBR(bss, value); SSYNC(); |