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| author | Cliff Cai <cliff.cai@analog.com> | 2009-11-17 09:36:21 +0000 |
|---|---|---|
| committer | Mike Frysinger <vapier@gentoo.org> | 2010-01-17 09:17:27 -0500 |
| commit | 17ebd5bf3393144f3ead19384318a6e5b01c4f90 (patch) | |
| tree | 55e7b046751cd5c190d971112ca89c3e53cf8655 /drivers/spi/bfin_spi.c | |
| parent | ea693f22d8dbd8a65867a60a7f3faac30f85d65b (diff) | |
| download | talos-obmc-uboot-17ebd5bf3393144f3ead19384318a6e5b01c4f90.tar.gz talos-obmc-uboot-17ebd5bf3393144f3ead19384318a6e5b01c4f90.zip | |
Blackfin: bfin_spi: let boards control idle value
Some SPI devices like to see high idle values rather than low.
Signed-off-by: Cliff Cai <cliff.cai@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Diffstat (limited to 'drivers/spi/bfin_spi.c')
| -rw-r--r-- | drivers/spi/bfin_spi.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/drivers/spi/bfin_spi.c b/drivers/spi/bfin_spi.c index 2a72f99b24..093166efed 100644 --- a/drivers/spi/bfin_spi.c +++ b/drivers/spi/bfin_spi.c @@ -314,6 +314,10 @@ 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 +344,7 @@ 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(); |
