add CONFIG_SPI_IDLE_VAL for cf_spi.c to allow use of spi_mmc
This patch adds CONFIG_SPI_IDLE_VAL to cf_spi.c
The default setting is 0x0 to behave same as current version, in case
CONFIG_SPI_MMC is set, the value is set to 0xFFFF (all ones). In either
case, the value can be overwritten by board configuration.
Signed-off-by: Wolfgang Wegner <w.wegner@astro-kom.de>
Signed-off-by: Andy Fleming <afleming@freescale.com>
diff --git a/drivers/spi/cf_spi.c b/drivers/spi/cf_spi.c
index 722aafc..a883da9 100644
--- a/drivers/spi/cf_spi.c
+++ b/drivers/spi/cf_spi.c
@@ -49,6 +49,14 @@
DECLARE_GLOBAL_DATA_PTR;
+#ifndef CONFIG_SPI_IDLE_VAL
+#if defined(CONFIG_SPI_MMC)
+#define CONFIG_SPI_IDLE_VAL 0xFFFF
+#else
+#define CONFIG_SPI_IDLE_VAL 0x0
+#endif
+#endif
+
#if defined(CONFIG_CF_DSPI)
/* DSPI specific mode */
#define SPI_MODE_MOD 0x00200000
@@ -145,7 +153,7 @@
}
if (din != NULL) {
- cfspi_tx(ctrl, 0);
+ cfspi_tx(ctrl, CONFIG_SPI_IDLE_VAL);
if (cfslave->charbit == 16)
*spi_rd16++ = cfspi_rx();
else
@@ -169,7 +177,7 @@
}
if (din != NULL) {
- cfspi_tx(ctrl, 0);
+ cfspi_tx(ctrl, CONFIG_SPI_IDLE_VAL);
if (cfslave->charbit == 16)
*spi_rd16 = cfspi_rx();
else
@@ -177,7 +185,7 @@
}
} else {
/* dummy read */
- cfspi_tx(ctrl, 0);
+ cfspi_tx(ctrl, CONFIG_SPI_IDLE_VAL);
cfspi_rx();
}