mtd: chips/map_ram.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>
Reviewed-by: Richard Weinberger <richard@nod.at>
Acked-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Signed-off-by: Richard Weinberger <richard@nod.at>

diff --git a/drivers/mtd/chips/map_ram.c b/drivers/mtd/chips/map_ram.c
index afb43d5..c3939dd 100644 (file)
--- a/drivers/mtd/chips/map_ram.c
+++ b/drivers/mtd/chips/map_ram.c
@@ -22,6 +22,9 @@ static void mapram_nop (struct mtd_info *);
 static struct mtd_info *map_ram_probe(struct map_info *map);
 static unsigned long mapram_unmapped_area(struct mtd_info *, unsigned long,
                                          unsigned long, unsigned long);
+static int mapram_point (struct mtd_info *mtd, loff_t from, size_t len,
+                        size_t *retlen, void **virt, resource_size_t *phys);
+static int mapram_unpoint(struct mtd_info *mtd, loff_t from, size_t len);
 
 
 static struct mtd_chip_driver mapram_chipdrv = {
@@ -69,7 +72,9 @@ static struct mtd_info *map_ram_probe(struct map_info *map)
        mtd->_read = mapram_read;
        mtd->_write = mapram_write;
        mtd->_panic_write = mapram_write;
+       mtd->_point = mapram_point;
        mtd->_sync = mapram_nop;
+       mtd->_unpoint = mapram_unpoint;
        mtd->flags = MTD_CAP_RAM;
        mtd->writesize = 1;
 
@@ -96,6 +101,25 @@ static unsigned long mapram_unmapped_area(struct mtd_info *mtd,
        return (unsigned long) map->virt + offset;
 }
 
+static int mapram_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 mapram_unpoint(struct mtd_info *mtd, loff_t from, size_t len)
+{
+       return 0;
+}
+
 static int mapram_read (struct mtd_info *mtd, loff_t from, size_t len, size_t *retlen, u_char *buf)
 {
        struct map_info *map = mtd->priv;