From: Jagannadha Sutradharudu Teki <jaganna@xilinx.com>
Date: Mon, 13 Aug 2012 06:40:58 +0000 (+0530)
Subject: Xilinx: ARM: sf: stmicro: Add support to program using dual qspi
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=d47f7326e529aa41a525862931cfd37180238016;p=thirdparty%2Fu-boot.git

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

This patch enables programming of stmicro flash devices
using dual qspi. stmicro 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/stmicro.c b/drivers/mtd/spi/stmicro.c
index 3b8bed23299..2b86dd5f8fd 100644
--- a/drivers/mtd/spi/stmicro.c
+++ b/drivers/mtd/spi/stmicro.c
@@ -181,6 +181,13 @@ struct spi_flash *spi_flash_probe_stmicro(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;
 
@@ -189,7 +196,13 @@ struct spi_flash *spi_flash_probe_stmicro(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;
 }