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

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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>
This commit is contained in:
Nicolas Pitre 2017-10-30 14:48:31 -04:00 committed by Richard Weinberger
parent 2caaf2d83a
commit 55100cfa33
1 changed files with 25 additions and 0 deletions
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25
drivers/mtd/chips/map_rom.c
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@ -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;