diff --git a/drivers/mtd/devices/phram.c b/drivers/mtd/devices/phram.c
index 67823de..5eee2a6 100644
--- a/drivers/mtd/devices/phram.c
+++ b/drivers/mtd/devices/phram.c
@@ -5,14 +5,15 @@
  * Usage:
  *
  * one commend line parameter per device, each in the form:
- *   phram=<name>,<start>,<len>
+ *   phram=<name>,<start>,<len>[,<erasesize>]
  * <name> may be up to 63 characters.
- * <start> and <len> can be octal, decimal or hexadecimal.  If followed
- * by "ki", "Mi" or "Gi", the numbers will be interpreted as kilo, mega or
- * gigabytes.
+ * <start>, <len>, and <erasesize> can be octal, decimal or
+ * hexadecimal.  If followed by "ki", "Mi" or "Gi", the numbers
+ * will be interpreted as kilo, mega or gigabytes.  <erasesize>
+ * is optional and defaults to PAGE_SIZE.
  *
  * Example:
- * phram=swap,64Mi,128Mi phram=test,900Mi,1Mi
+ * phram=swap,64Mi,128Mi phram=test,900Mi,1Mi,64Ki
  */

 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
@@ -94,7 +95,8 @@ static void unregister_devices(void)
    }
 }

-static int register_device(char *name, unsigned long start, unsigned long len)
+static int register_device(char *name, unsigned long start,
+       unsigned long len, unsigned long erasesize)
 {
    struct phram_mtd_list *new;
    int ret = -ENOMEM;
@@ -121,7 +123,7 @@ static int register_device(char *name, unsigned
long start, unsigned long len)
    new->mtd._write = phram_write;
    new->mtd.owner = THIS_MODULE;
    new->mtd.type = MTD_RAM;
-   new->mtd.erasesize = PAGE_SIZE;
+   new->mtd.erasesize = erasesize;
    new->mtd.writesize = 1;