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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>
This commit is contained in:
Nicolas Pitre 2017-10-30 14:48:30 -04:00 committed by Richard Weinberger
parent 877b58ebc0
commit 2caaf2d83a
1 changed files with 24 additions and 0 deletions
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24
drivers/mtd/chips/map_ram.c
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@ -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;