[ARM] 4470/2: OSIRIS: large page NAND support

Add support for the partition layout on the revision B
modules which have large page NAND fitted.

The new partition table accounts for the use of the
128KiB block parts, which means the second partition
on the device is moved to the new boundary.
Signed-off-by: NBen Dooks <ben-linux@fluff.org>
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>

arch/arm/mach-s3c2440/mach-osiris.c

@@ -166,6 +166,29 @@ static struct mtd_partition osiris_default_nand_part[] = {
 	}
 };
 
+static struct mtd_partition osiris_default_nand_part_large[] = {
+	[0] = {
+		.name	= "Boot Agent",
+		.size	= SZ_128K,
+		.offset	= 0,
+	},
+	[1] = {
+		.name	= "/boot",
+		.size	= SZ_4M - SZ_128K,
+		.offset	= SZ_128K,
+	},
+	[2] = {
+		.name	= "user1",
+		.offset	= SZ_4M,
+		.size	= SZ_32M - SZ_4M,
+	},
+	[3] = {
+		.name	= "user2",
+		.offset	= SZ_32M,
+		.size	= MTDPART_SIZ_FULL,
+	}
+};
+
 /* the Osiris has 3 selectable slots for nand-flash, the two
  * on-board chip areas, as well as the external slot.
  *
@@ -322,14 +345,23 @@ static void __init osiris_map_io(void)
 	s3c24xx_init_clocks(0);
 	s3c24xx_init_uarts(osiris_uartcfgs, ARRAY_SIZE(osiris_uartcfgs));
 
+	/* check for the newer revision boards with large page nand */
+
+	if ((__raw_readb(OSIRIS_VA_IDREG) & OSIRIS_ID_REVMASK) >= 4) {
+		printk(KERN_INFO "OSIRIS-B detected (revision %d)\n",
+		       __raw_readb(OSIRIS_VA_IDREG) & OSIRIS_ID_REVMASK);
+		osiris_nand_sets[0].partitions = osiris_default_nand_part_large;
+		osiris_nand_sets[0].nr_partitions = ARRAY_SIZE(osiris_default_nand_part_large);
+	} else {
+		/* write-protect line to the NAND */
+		s3c2410_gpio_setpin(S3C2410_GPA0, 1);
+	}
+
 	/* fix bus configuration (nBE settings wrong on ABLE pre v2.20) */
 
 	local_irq_save(flags);
 	__raw_writel(__raw_readl(S3C2410_BWSCON) | S3C2410_BWSCON_ST1 | S3C2410_BWSCON_ST2 | S3C2410_BWSCON_ST3 | S3C2410_BWSCON_ST4 | S3C2410_BWSCON_ST5, S3C2410_BWSCON);
 	local_irq_restore(flags);
-
-	/* write-protect line to the NAND */
-	s3c2410_gpio_setpin(S3C2410_GPA0, 1);
 }
 
 static void __init osiris_init(void)