spi: Remove dual flash options/flags

Dual flash code in spi are usually take the spi controller
to work with dual connected flash devices. Usually these
dual connection operation's are referred to flash controller
protocol rather with spi controller protocol, these are still
present in flash side for the usage of spi-nor controllers.

So, this patch remove the dual_flash options or flags in sf
which are triggered from spi controller side.

Cc: Bin Meng <bmeng.cn@gmail.com>
Cc: York Sun <york.sun@nxp.com>
Cc: Vignesh R <vigneshr@ti.com>
Cc: Mugunthan V N <mugunthanvnm@ti.com>
Cc: Michal Simek <michal.simek@xilinx.com>
Cc: Siva Durga Prasad Paladugu <sivadur@xilinx.com>
Signed-off-by: Jagan Teki <jagan@openedev.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Jagan Teki <jagan@openedev.com>

drivers/mtd/spi/sf.c

@@ -18,10 +18,6 @@ static int spi_flash_read_write(struct spi_slave *spi,
 	unsigned long flags = SPI_XFER_BEGIN;
 	int ret;
 
-#ifdef CONFIG_SF_DUAL_FLASH
-	if (spi->flags & SPI_XFER_U_PAGE)
-		flags |= SPI_XFER_U_PAGE;
-#endif
 	if (data_len == 0)
 		flags |= SPI_XFER_END;
 

drivers/mtd/spi/sf_internal.h

@@ -23,6 +23,7 @@ enum spi_dual_flash {
 enum spi_nor_option_flags {
 	SNOR_F_SST_WR		= BIT(0),
 	SNOR_F_USE_FSR		= BIT(1),
+	SNOR_F_USE_UPAGE	= BIT(3),
 };
 
 #define SPI_FLASH_3B_ADDR_LEN		3

drivers/mtd/spi/spi_flash.c

@@ -199,15 +199,13 @@ bar_end:
 #ifdef CONFIG_SF_DUAL_FLASH
 static void spi_flash_dual(struct spi_flash *flash, u32 *addr)
 {
-	struct spi_slave *spi = flash->spi;
-
 	switch (flash->dual_flash) {
 	case SF_DUAL_STACKED_FLASH:
 		if (*addr >= (flash->size >> 1)) {
 			*addr -= flash->size >> 1;
-			spi->flags |= SPI_XFER_U_PAGE;
+			flash->flags |= SNOR_F_USE_UPAGE;
 		} else {
-			spi->flags &= ~SPI_XFER_U_PAGE;
+			flash->flags &= ~SNOR_F_USE_UPAGE;
 		}
 		break;
 	case SF_DUAL_PARALLEL_FLASH:
@@ -1016,7 +1014,6 @@ int spi_flash_scan(struct spi_flash *flash)
 
 	flash->name = info->name;
 	flash->memory_map = spi->memory_map;
-	flash->dual_flash = spi->option;
 
 	if (info->flags & SST_WR)
 		flash->flags |= SNOR_F_SST_WR;

include/spi.h

@@ -30,10 +30,6 @@
 #define SPI_RX_DUAL	BIT(12)			/* receive with 2 wires */
 #define SPI_RX_QUAD	BIT(13)			/* receive with 4 wires */
 
-/* SPI bus connection options - see enum spi_dual_flash */
-#define SPI_CONN_DUAL_SHARED		(1 << 0)
-#define SPI_CONN_DUAL_SEPARATED	(1 << 1)
-
 /* Header byte that marks the start of the message */
 #define SPI_PREAMBLE_END_BYTE	0xec
 
@@ -93,7 +89,6 @@ struct dm_spi_slave_platdata {
  * @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, shared bus.
  * @flags:		Indication of SPI flags.
  */
 struct spi_slave {
@@ -117,7 +112,6 @@ struct spi_slave {
 #define SPI_XFER_ONCE		(SPI_XFER_BEGIN | SPI_XFER_END)
 #define SPI_XFER_MMAP		BIT(2)	/* Memory Mapped start */
 #define SPI_XFER_MMAP_END	BIT(3)	/* Memory Mapped End */
-#define SPI_XFER_U_PAGE		BIT(4)
 };
 
 /**