1 files changed, 76 insertions, 0 deletions
diff --git a/target/linux/generic/pending-5.4/404-mtd-add-more-helper-functions.patch b/target/linux/generic/pending-5.4/404-mtd-add-more-helper-functions.patch
new file mode 100644
index 0000000000..e404ec1fb2
--- /dev/null
+++ b/target/linux/generic/pending-5.4/404-mtd-add-more-helper-functions.patch
@@ -0,0 +1,76 @@
+From: Gabor Juhos <juhosg@openwrt.org>
+Subject: kernel/3.10: add separate rootfs partition parser
+
+lede-commit: daec7ad7688415156e2730e401503d09bd3acf91
+Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
+---
+ drivers/mtd/mtdpart.c          | 29 +++++++++++++++++++++++++++++
+ include/linux/mtd/mtd.h        | 18 ++++++++++++++++++
+ include/linux/mtd/partitions.h |  2 ++
+ 3 files changed, 49 insertions(+)
+
+--- a/drivers/mtd/mtdpart.c
++++ b/drivers/mtd/mtdpart.c
+@@ -1179,6 +1179,24 @@ int mtd_is_partition(const struct mtd_in
+ }
+ EXPORT_SYMBOL_GPL(mtd_is_partition);
+ 
++struct mtd_info *mtdpart_get_master(const struct mtd_info *mtd)
++{
++	if (!mtd_is_partition(mtd))
++		return (struct mtd_info *)mtd;
++
++	return mtd_to_part(mtd)->parent;
++}
++EXPORT_SYMBOL_GPL(mtdpart_get_master);
++
++uint64_t mtdpart_get_offset(const struct mtd_info *mtd)
++{
++	if (!mtd_is_partition(mtd))
++		return 0;
++
++	return mtd_to_part(mtd)->offset;
++}
++EXPORT_SYMBOL_GPL(mtdpart_get_offset);
++
+ /* Returns the size of the entire flash chip */
+ uint64_t mtd_get_device_size(const struct mtd_info *mtd)
+ {
+--- a/include/linux/mtd/mtd.h
++++ b/include/linux/mtd/mtd.h
+@@ -507,6 +507,24 @@ static inline void mtd_align_erase_req(s
+ 		req->len += mtd->erasesize - mod;
+ }
+ 
++static inline uint64_t mtd_roundup_to_eb(uint64_t sz, struct mtd_info *mtd)
++{
++	if (mtd_mod_by_eb(sz, mtd) == 0)
++		return sz;
++
++	/* Round up to next erase block */
++	return (mtd_div_by_eb(sz, mtd) + 1) * mtd->erasesize;
++}
++
++static inline uint64_t mtd_rounddown_to_eb(uint64_t sz, struct mtd_info *mtd)
++{
++	if (mtd_mod_by_eb(sz, mtd) == 0)
++		return sz;
++
++	/* Round down to the start of the current erase block */
++	return (mtd_div_by_eb(sz, mtd)) * mtd->erasesize;
++}
++
+ static inline uint32_t mtd_div_by_ws(uint64_t sz, struct mtd_info *mtd)
+ {
+ 	if (mtd->writesize_shift)
+--- a/include/linux/mtd/partitions.h
++++ b/include/linux/mtd/partitions.h
+@@ -116,6 +116,8 @@ int mtd_is_partition(const struct mtd_in
+ int mtd_add_partition(struct mtd_info *master, const char *name,
+ 		      long long offset, long long length);
+ int mtd_del_partition(struct mtd_info *master, int partno);
++struct mtd_info *mtdpart_get_master(const struct mtd_info *mtd);
++uint64_t mtdpart_get_offset(const struct mtd_info *mtd);
+ uint64_t mtd_get_device_size(const struct mtd_info *mtd);
+ 
+ #endif