[MTD] [NAND] at91_nand.c: CMDLINE_PARTS support

This patch allows you to specify at91_nand partitions on the
kernel command line using the mtdparts variable, if
CONFIG_MTD_CMDLINE_PARTS is set.

Signed-off-by: Frank Mandarino <fmandarino@endrelia.com>
Signed-off-by: Andrew Victor <andrew@sanpeople.com>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>

1 files changed, 10 insertions, 0 deletions

diff --git a/drivers/mtd/nand/at91_nand.c b/drivers/mtd/nand/at91_nand.c
index 14b80cc90a7b..512e999177f7 100644
--- a/drivers/mtd/nand/at91_nand.c
+++ b/drivers/mtd/nand/at91_nand.c
@@ -82,6 +82,10 @@ static void at91_nand_disable(struct at91_nand_host *host)
                 at91_set_gpio_value(host->board->enable_pin, 1);
 }
 
+#ifdef CONFIG_MTD_PARTITIONS
+const char *part_probes[] = { "cmdlinepart", NULL };
+#endif
+
 /*
  * Probe for the NAND device.
  */
@@ -151,6 +155,12 @@ static int __init at91_nand_probe(struct platform_device *pdev)
 #ifdef CONFIG_MTD_PARTITIONS
         if (host->board->partition_info)
                 partitions = host->board->partition_info(mtd->size, &num_partitions);
+#ifdef CONFIG_MTD_CMDLINE_PARTS
+        else {
+                mtd->name = "at91_nand";
+                num_partitions = parse_mtd_partitions(mtd, part_probes, &partitions, 0);
+        }
+#endif
 
         if ((!partitions) || (num_partitions == 0)) {
                 printk(KERN_ERR "at91_nand: No parititions defined, or unsupported device.\n");