summaryrefslogtreecommitdiffstats
path: root/drivers/mtd/chips/map_rom.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/mtd/chips/map_rom.c')
-rw-r--r--drivers/mtd/chips/map_rom.c13
1 files changed, 12 insertions, 1 deletions
diff --git a/drivers/mtd/chips/map_rom.c b/drivers/mtd/chips/map_rom.c
index 47a43cf7e5c6..e67f73ab44c9 100644
--- a/drivers/mtd/chips/map_rom.c
+++ b/drivers/mtd/chips/map_rom.c
@@ -11,6 +11,7 @@
#include <linux/errno.h>
#include <linux/slab.h>
#include <linux/init.h>
+#include <linux/of.h>
#include <linux/mtd/mtd.h>
#include <linux/mtd/map.h>
@@ -28,6 +29,15 @@ static struct mtd_chip_driver maprom_chipdrv = {
.module = THIS_MODULE
};
+static unsigned int default_erasesize(struct map_info *map)
+{
+ const __be32 *erase_size = NULL;
+
+ erase_size = of_get_property(map->device_node, "erase-size", NULL);
+
+ return !erase_size ? map->size : be32_to_cpu(*erase_size);
+}
+
static struct mtd_info *map_rom_probe(struct map_info *map)
{
struct mtd_info *mtd;
@@ -47,8 +57,9 @@ static struct mtd_info *map_rom_probe(struct map_info *map)
mtd->_sync = maprom_nop;
mtd->_erase = maprom_erase;
mtd->flags = MTD_CAP_ROM;
- mtd->erasesize = map->size;
+ mtd->erasesize = default_erasesize(map);
mtd->writesize = 1;
+ mtd->writebufsize = 1;
__module_get(THIS_MODULE);
return mtd;