From: Cliff Cai <cliff.cai@analog.com>
Date: Tue, 17 Nov 2009 09:36:21 +0000 (+0000)
Subject: Blackfin: bfin_spi: let boards control idle value
X-Git-Tag: v2010.03-rc1~152^2~16
X-Git-Url: https://git.sur5r.net/?a=commitdiff_plain;h=17ebd5bf3393144f3ead19384318a6e5b01c4f90;p=u-boot

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>
---

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();