[MTD][NOR] Add physical address to point() method

Adding the ability to get a physical address from point() in addition
to virtual address.  This physical address is required for XIP of
userspace code from flash.

Signed-off-by: Jared Hulbert <jaredeh@gmail.com>
Reviewed-by: Jörn Engel <joern@logfs.org>
Acked-by: Nicolas Pitre <nico@cam.org>
Acked-by: Greg Ungerer <gerg@uclinux.org>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>

1 files changed, 7 insertions, 6 deletions

diff --git a/drivers/mtd/devices/phram.c b/drivers/mtd/devices/phram.c
index 5f960182da95..c7987b1c5e01 100644
--- a/drivers/mtd/devices/phram.c
+++ b/drivers/mtd/devices/phram.c
@@ -57,20 +57,21 @@ static int phram_erase(struct mtd_info *mtd, struct erase_info *instr)
 }
 
 static int phram_point(struct mtd_info *mtd, loff_t from, size_t len,
-                size_t *retlen, u_char **mtdbuf)
+                size_t *retlen, void **virt, resource_size_t *phys)
 {
-        u_char *start = mtd->priv;
-
         if (from + len > mtd->size)
                 return -EINVAL;
 
-        *mtdbuf = start + from;
+        /* can we return a physical address with this driver? */
+        if (phys)
+                return -EINVAL;
+
+        *virt = mtd->priv + from;
         *retlen = len;
         return 0;
 }
 
-static void phram_unpoint(struct mtd_info *mtd, u_char *addr, loff_t from,
-                size_t len)
+static void phram_unpoint(struct mtd_info *mtd, loff_t from, size_t len)
 {
 }