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authorNicolas Pitre <nicolas.pitre@linaro.org>2017-10-30 14:48:30 -0400
committerRichard Weinberger <richard@nod.at>2017-11-13 21:39:17 +0100
commit2caaf2d83a76bc35b4694f48d62ff2cab2d1105d (patch)
treea276e5c6a48db729831104218e16eff0617029d0 /drivers/mtd
parent877b58ebc038f5e3f0afc5674fc35db75eaaa117 (diff)
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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>
Diffstat (limited to 'drivers/mtd')
-rw-r--r--drivers/mtd/chips/map_ram.c24
1 files changed, 24 insertions, 0 deletions
diff --git a/drivers/mtd/chips/map_ram.c b/drivers/mtd/chips/map_ram.c
index afb43d5e1782..c3939dd230c6 100644
--- 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;