This patch adds a struct device_node pointer to struct mtd_partition.
Partitions parsed via ofpart can now be referenced via devicetree.
Cc: David Woodhouse <dw...@infradead.org>
Cc: Brian Norris <computersforpe...@gmail.com>
Signed-off-by: Moritz Fischer <moritz.fisc...@ettus.com>
---
Hi all,
during my work on another patch series for supporting
otp regions as nvmem providers via dt (follow up series),
I realized we don't actually assign node pointers.
While not used for ofpart atm, I can see cases where having
the pointer is useful to reference raw mtd partitions.
I can also (re)submit this as part of my upcoming series for
nvmem / otp support
Cheers,
Moritz
---
drivers/mtd/mtdpart.c | 1 +
drivers/mtd/ofpart.c | 1 +
include/linux/mtd/partitions.h | 4 ++++
3 files changed, 6 insertions(+)
diff --git a/drivers/mtd/mtdpart.c b/drivers/mtd/mtdpart.c
index 6778ba2..3af9cf5 100644
--- a/drivers/mtd/mtdpart.c
+++ b/drivers/mtd/mtdpart.c
@@ -439,6 +439,7 @@ static struct mtd_part *allocate_partition(struct mtd_info
*master,
slave->mtd.name = name;
slave->mtd.owner = master->owner;
+ slave->mtd.dev.of_node = part->node;
/* NOTE: Historically, we didn't arrange MTDs as a tree out of
* concern for showing the same data in multiple partitions.
diff --git a/drivers/mtd/ofpart.c b/drivers/mtd/ofpart.c
index 6127ee6..caeaef0 100644
--- a/drivers/mtd/ofpart.c
+++ b/drivers/mtd/ofpart.c
@@ -108,6 +108,7 @@ static int parse_ofpart_partitions(struct mtd_info *master,
parts[i].offset = of_read_number(reg, a_cells);
parts[i].size = of_read_number(reg + a_cells, s_cells);
+ parts[i].node = pp;
partname = of_get_property(pp, "label", &len);
if (!partname)
diff --git a/include/linux/mtd/partitions.h b/include/linux/mtd/partitions.h
index 70736e1..51d36ac 100644
--- a/include/linux/mtd/partitions.h
+++ b/include/linux/mtd/partitions.h
@@ -31,6 +31,9 @@
* master MTD flag set for the corresponding MTD partition.
* For example, to force a read-only partition, simply adding
* MTD_WRITEABLE to the mask_flags will do the trick.
+ * node: contains device node pointer, necessary to reference device using
+ * devicetree.
+
*
* Note: writeable partitions require their size and offset be
* erasesize aligned (e.g. use MTDPART_OFS_NEXTBLK).
@@ -41,6 +44,7 @@ struct mtd_partition {
uint64_t size; /* partition size */
uint64_t offset; /* offset within the master MTD space */
uint32_t mask_flags; /* master MTD flags to mask out for
this partition */
+ struct device_node *node; /* pointer to the device node */
};
#define MTDPART_OFS_RETAIN (-3)
--
2.5.5
