From 17ebd5bf3393144f3ead19384318a6e5b01c4f90 Mon Sep 17 00:00:00 2001 From: Cliff Cai Date: Tue, 17 Nov 2009 09:36:21 +0000 Subject: [PATCH] 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 Signed-off-by: Mike Frysinger --- drivers/spi/bfin_spi.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) 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();