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

This patch enables programming of winbond flash devices
using dual qspi. winbond 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/winbond.c b/drivers/mtd/spi/winbond.c
index 4719aca070d74f8e5148f4fef03eedd699162694..ffa2142c2211b137e52ee23968f61d920452533a 100755 (executable)
--- a/drivers/mtd/spi/winbond.c
+++ b/drivers/mtd/spi/winbond.c
@@ -139,6 +139,13 @@ struct spi_flash *spi_flash_probe_winbond(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;
 
@@ -150,9 +157,16 @@ struct spi_flash *spi_flash_probe_winbond(struct spi_slave *spi, u8 *idcode)
        flash->read = spi_flash_cmd_read_fast;
        flash->page_size = page_size;
        flash->sector_size = page_size * params->pages_per_sector;
-       flash->size = page_size * params->pages_per_sector
+       if (flash->addr_width == 3)
+               flash->size = page_size * params->pages_per_sector
                                * params->sectors_per_block
                                * params->nr_blocks;
+       else if (flash->addr_width == 4) {
+               printf("Dual Flash\n");
+               flash->size = page_size * params->pages_per_sector
+                               * params->sectors_per_block
+                               * (2 * params->nr_blocks);
+       }
 
        return flash;
 }