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authorArtem B. Bityutskiy <dedekind@sauron.oktetlabs.ru>2006-06-14 19:53:44 +0400
committerArtem B. Bityutskiy <dedekind@sauron.oktetlabs.ru>2006-06-14 19:53:44 +0400
commit783ed81ff39d3f938a6b2efd09fbad96e41e5c1f (patch)
tree31cdfd9c39c9451ba37866dcb6e82e68c770216c /include/linux
parentf9068876f5ef583f8e9ebf4acd2ef5b35b113db9 (diff)
[MTD] assume mtd->writesize is 1 for NOR flashes
Signed-off-by: Artem B. Bityitskiy
Diffstat (limited to 'include/linux')
-rw-r--r--include/linux/mtd/mtd.h9
1 files changed, 6 insertions, 3 deletions
diff --git a/include/linux/mtd/mtd.h b/include/linux/mtd/mtd.h
index 9536567d041..e1d2a3d5654 100644
--- a/include/linux/mtd/mtd.h
+++ b/include/linux/mtd/mtd.h
@@ -110,9 +110,12 @@ struct mtd_info {
* information below if they desire
*/
u_int32_t erasesize;
- /* Smallest availlable size for writing to the device. For NAND,
- * this is the page size, for some NOR chips, the size of ECC
- * covered blocks.
+ /* Minimal writable flash unit size. In case of NOR flash it is 1 (even
+ * though individual bits can be cleared), in case of NAND flash it is
+ * one NAND page (or half, or one-fourths of it), in case of ECC-ed NOR
+ * it is of ECC block size, etc. It is illegal to have writesize = 0.
+ * Any driver registering a struct mtd_info must ensure a writesize of
+ * 1 or larger.
*/
u_int32_t writesize;