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Commit 2caaf2d8 authored by Nicolas Pitre's avatar Nicolas Pitre Committed by Richard Weinberger
Browse files

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: default avatarNicolas Pitre <nico@linaro.org>
Reviewed-by: default avatarRichard Weinberger <richard@nod.at>
Acked-by: default avatarBoris Brezillon <boris.brezillon@free-electrons.com>
Signed-off-by: default avatarRichard Weinberger <richard@nod.at>
parent 877b58eb

drivers/mtd/chips/map_ram.c

+24 −0
Original line number Diff line number Diff line
@@ -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;