mtd: chips/map_rom.c: implement point and unpoint methods

This will allow for the removal of the get_unmapped_area method later.

Signed-off-by: Nicolas Pitre <nico@linaro.org>
Acked-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Tested-by: Chris Brandt <chris.brandt@renesas.com>
[rw: fixed build]
Signed-off-by: Richard Weinberger <richard@nod.at>

1 files changed, 25 insertions, 0 deletions

diff --git a/drivers/mtd/chips/map_rom.c b/drivers/mtd/chips/map_rom.c
index e67f73ab44c9..72934c1fbbe0 100644
--- a/drivers/mtd/chips/map_rom.c
+++ b/drivers/mtd/chips/map_rom.c
@@ -22,6 +22,10 @@ static struct mtd_info *map_rom_probe(struct map_info *map);
 static int maprom_erase (struct mtd_info *mtd, struct erase_info *info);
 static unsigned long maprom_unmapped_area(struct mtd_info *, unsigned long,
                                           unsigned long, unsigned long);
+static int maprom_point (struct mtd_info *mtd, loff_t from, size_t len,
+                         size_t *retlen, void **virt, resource_size_t *phys);
+static int maprom_unpoint(struct mtd_info *mtd, loff_t from, size_t len);
+
 
 static struct mtd_chip_driver maprom_chipdrv = {
         .probe  = map_rom_probe,
@@ -52,6 +56,8 @@ static struct mtd_info *map_rom_probe(struct map_info *map)
         mtd->type = MTD_ROM;
         mtd->size = map->size;
         mtd->_get_unmapped_area = maprom_unmapped_area;
+        mtd->_point = maprom_point;
+        mtd->_unpoint = maprom_unpoint;
         mtd->_read = maprom_read;
         mtd->_write = maprom_write;
         mtd->_sync = maprom_nop;
@@ -80,6 +86,25 @@ static unsigned long maprom_unmapped_area(struct mtd_info *mtd,
         return (unsigned long) map->virt + offset;
 }
 
+static int maprom_point(struct mtd_info *mtd, loff_t from, size_t len,
+                        size_t *retlen, void **virt, resource_size_t *phys)
+{
+        struct map_info *map = mtd->priv;
+
+        if (!map->virt)
+                return -EINVAL;
+        *virt = map->virt + from;
+        if (phys)
+                *phys = map->phys + from;
+        *retlen = len;
+        return 0;
+}
+
+static int maprom_unpoint(struct mtd_info *mtd, loff_t from, size_t len)
+{
+        return 0;
+}
+
 static int maprom_read (struct mtd_info *mtd, loff_t from, size_t len, size_t *retlen, u_char *buf)
 {
         struct map_info *map = mtd->priv;