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authorJagannadha Sutradharudu Teki <jaganna@xilinx.com>2014-01-12 21:40:11 +0530
committerJagannadha Sutradharudu Teki <jaganna@xilinx.com>2014-01-12 21:40:11 +0530
commitf77f469117ab3184ac45683a50dc446265be28cc (patch)
tree3f5f0783521f5401251cc4a94503573dc2e91baf /include/spi.h
parentab92224f4550f9677be32dd903e99acf1475dbf7 (diff)
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sf: Add dual memories support - DUAL_STACKED
This patch added support for accessing dual memories in stacked connection with single chipselect line from controller. For more info - see doc/SPI/README.dual-flash Signed-off-by: Jagannadha Sutradharudu Teki <jaganna@xilinx.com>
Diffstat (limited to 'include/spi.h')
-rw-r--r--include/spi.h8
1 files changed, 8 insertions, 0 deletions
diff --git a/include/spi.h b/include/spi.h
index c8a9d87..d214d82 100644
--- a/include/spi.h
+++ b/include/spi.h
@@ -30,6 +30,7 @@
#define SPI_XFER_MMAP 0x08 /* Memory Mapped start */
#define SPI_XFER_MMAP_END 0x10 /* Memory Mapped End */
#define SPI_XFER_ONCE (SPI_XFER_BEGIN | SPI_XFER_END)
+#define SPI_XFER_U_PAGE (1 << 5)
/* SPI TX operation modes */
#define SPI_OPM_TX_QPP 1 << 0
@@ -44,6 +45,9 @@
SPI_OPM_RX_DIO | SPI_OPM_RX_QOF | \
SPI_OPM_RX_QIOF
+/* SPI bus connection options */
+#define SPI_CONN_DUAL_SHARED 1 << 0
+
/* Header byte that marks the start of the message */
#define SPI_PREAMBLE_END_BYTE 0xec
@@ -62,6 +66,8 @@
* @max_write_size: If non-zero, the maximum number of bytes which can
* be written at once, excluding command bytes.
* @memory_map: Address of read-only SPI flash access.
+ * @option: Varies SPI bus options - separate bus.
+ * @flags: Indication of SPI flags.
*/
struct spi_slave {
unsigned int bus;
@@ -71,6 +77,8 @@ struct spi_slave {
unsigned int wordlen;
unsigned int max_write_size;
void *memory_map;
+ u8 option;
+ u8 flags;
};
/**