5dba0a237e
The current code only allows to automatically set root device on MTD partitions. Move the code to MTD core to allow to use it with all MTD devices. Signed-off-by: Gabor Juhos <juhosg@openwrt.org> SVN-Revision: 38643
83 lines
2.7 KiB
Diff
83 lines
2.7 KiB
Diff
--- a/drivers/mtd/mtdpart.c
|
|
+++ b/drivers/mtd/mtdpart.c
|
|
@@ -434,14 +434,12 @@ static struct mtd_part *allocate_partiti
|
|
if (slave->offset == MTDPART_OFS_APPEND)
|
|
slave->offset = cur_offset;
|
|
if (slave->offset == MTDPART_OFS_NXTBLK) {
|
|
- slave->offset = cur_offset;
|
|
- if (mtd_mod_by_eb(cur_offset, master) != 0) {
|
|
- /* Round up to next erasesize */
|
|
- slave->offset = (mtd_div_by_eb(cur_offset, master) + 1) * master->erasesize;
|
|
+ /* Round up to next erasesize */
|
|
+ slave->offset = mtd_roundup_to_eb(cur_offset, master);
|
|
+ if (slave->offset != cur_offset)
|
|
printk(KERN_NOTICE "Moving partition %d: "
|
|
"0x%012llx -> 0x%012llx\n", partno,
|
|
(unsigned long long)cur_offset, (unsigned long long)slave->offset);
|
|
- }
|
|
}
|
|
if (slave->offset == MTDPART_OFS_RETAIN) {
|
|
slave->offset = cur_offset;
|
|
@@ -987,6 +985,24 @@ 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 PART(mtd)->master;
|
|
+}
|
|
+EXPORT_SYMBOL_GPL(mtdpart_get_master);
|
|
+
|
|
+uint64_t mtdpart_get_offset(const struct mtd_info *mtd)
|
|
+{
|
|
+ if (!mtd_is_partition(mtd))
|
|
+ return 0;
|
|
+
|
|
+ return 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/partitions.h
|
|
+++ b/include/linux/mtd/partitions.h
|
|
@@ -90,6 +90,8 @@ int mtd_is_partition(const struct mtd_in
|
|
int mtd_add_partition(struct mtd_info *master, 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);
|
|
extern void __weak arch_split_mtd_part(struct mtd_info *master,
|
|
const char *name, int offset, int size);
|
|
--- a/include/linux/mtd/mtd.h
|
|
+++ b/include/linux/mtd/mtd.h
|
|
@@ -331,6 +331,24 @@ static inline uint32_t mtd_mod_by_eb(uin
|
|
return do_div(sz, mtd->erasesize);
|
|
}
|
|
|
|
+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)
|