[MTD] [NAND] pxa3xx_nand: allow to define flash types in the platform data

This patch adds 'flash' and 'num_flash' attributes to the platform data.
There was added code in the driver to iterate across these attributes in the
detect-flash routine.  This is done similarly to the existing method
which uses a 'builtin_flash_types' field.

Signed-off-by: Enrico Scholz <enrico.scholz@sigma-chemnitz.de>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>

arch/arm/mach-pxa/include/mach/pxa3xx_nand.h

@@ -58,6 +58,9 @@ struct pxa3xx_nand_platform_data {
 
 	struct mtd_partition *parts;
 	unsigned int	nr_parts;
+
+	struct pxa3xx_nand_flash * const	flash;
+	size_t					num_flash;
 };
 
 extern void pxa3xx_set_nand_info(struct pxa3xx_nand_platform_data *info);

drivers/mtd/nand/pxa3xx_nand.c

@@ -911,12 +911,26 @@ static int pxa3xx_nand_config_flash(struct pxa3xx_nand_info *info,
 	return 0;
 }
 
-static int pxa3xx_nand_detect_flash(struct pxa3xx_nand_info *info)
+static int pxa3xx_nand_detect_flash(struct pxa3xx_nand_info *info,
+				    const struct pxa3xx_nand_platform_data *pdata)
 {
 	struct pxa3xx_nand_flash *f;
 	uint32_t id;
 	int i;
 
+	for (i = 0; i<pdata->num_flash; ++i) {
+		f = pdata->flash + i;
+
+		if (pxa3xx_nand_config_flash(info, f))
+			continue;
+
+		if (__readid(info, &id))
+			continue;
+
+		if (id == f->chip_id)
+			return 0;
+	}
+
 	for (i = 0; i < ARRAY_SIZE(builtin_flash_types); i++) {
 
 		f = builtin_flash_types[i];
@@ -1114,7 +1128,7 @@ static int pxa3xx_nand_probe(struct platform_device *pdev)
 		goto fail_free_buf;
 	}
 
-	ret = pxa3xx_nand_detect_flash(info);
+	ret = pxa3xx_nand_detect_flash(info, pdata);
 	if (ret) {
 		dev_err(&pdev->dev, "failed to detect flash\n");
 		ret = -ENODEV;