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Blackfin: bfin_spi: let boards control idle value

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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>
This commit is contained in:
Cliff Cai 2009-11-17 09:36:21 +00:00 committed by Mike Frysinger
parent ea693f22d8
commit 17ebd5bf33
1 changed files with 5 additions and 1 deletions
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6
drivers/spi/bfin_spi.c
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@ -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();