Xilinx: ARM: sf: spansion: Add support to program using dual qspi

This patch enables programming of spansion flash devices
using dual qspi. spansion flash driver is updated to detect
the size of the flash based on the board header macro.

Signed-off-by: Jagannadha Sutradharudu Teki <jaganna@xilinx.com>

diff --git a/drivers/mtd/spi/spansion.c b/drivers/mtd/spi/spansion.c
index 6301d871237d0b6c1d139cb086bb04b5a9282c15..250aa4e7f452e3858f1f790069b74f78023bc9c4 100755 (executable)
--- a/drivers/mtd/spi/spansion.c
+++ b/drivers/mtd/spi/spansion.c
@@ -165,6 +165,13 @@ struct spi_flash *spi_flash_probe_spansion(struct spi_slave *spi, u8 *idcode)
                return NULL;
        }
 
+       /* address width is 4 for dual and 3 for single qspi */
+#ifdef CONFIG_XILINX_PSS_QSPI_USE_DUAL_FLASH
+       flash->addr_width = 4;
+#else
+       flash->addr_width = 3;
+#endif
+
        flash->spi = spi;
        flash->name = params->name;
 
@@ -173,7 +180,13 @@ struct spi_flash *spi_flash_probe_spansion(struct spi_slave *spi, u8 *idcode)
        flash->read = spi_flash_cmd_read_fast;
        flash->page_size = params->page_size;
        flash->sector_size = params->page_size * params->pages_per_sector;
-       flash->size = flash->sector_size * params->nr_sectors;
+
+       if (flash->addr_width == 3)
+               flash->size = flash->sector_size * params->nr_sectors;
+       else if (flash->addr_width == 4) {
+               printf("Dual Flash\n");
+               flash->size = flash->sector_size * (2 * params->nr_sectors);
+       }
 
        return flash;
 }