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authorRafał Miłecki <rafal@milecki.pl>2022-05-10 16:12:59 +0300
committerMiquel Raynal <miquel.raynal@bootlin.com>2022-05-16 19:37:48 +0300
commitbcdf0315a61a29eb753a607d3a85a4032de72d94 (patch)
treef021207fad662a6ff6ddc70fd9c9d6cb3b268fc5 /drivers/mtd
parent43823c5c56f247cfc028bf90299f675dd29abf88 (diff)
downloadlinux-bcdf0315a61a29eb753a607d3a85a4032de72d94.tar.xz
mtd: call of_platform_populate() for MTD partitions
Until this change MTD subsystem supported handling partitions only with MTD partitions parsers. That's a specific / limited API designed around partitions. Some MTD partitions may however require different handling. They may contain specific data that needs to be parsed and somehow extracted. For that purpose MTD subsystem should allow binding of standard platform drivers. An example can be U-Boot (sub)partition with environment variables. There exist a "u-boot,env" DT binding for MTD (sub)partition that requires an NVMEM driver. Ref: 5db1c2dbc04c ("dt-bindings: nvmem: add U-Boot environment variables binding") Signed-off-by: Rafał Miłecki <rafal@milecki.pl> Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com> Link: https://lore.kernel.org/linux-mtd/20220510131259.555-1-zajec5@gmail.com
Diffstat (limited to 'drivers/mtd')
-rw-r--r--drivers/mtd/mtdpart.c9
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/mtd/mtdpart.c b/drivers/mtd/mtdpart.c
index 357661b62c94..d442fa94c872 100644
--- a/drivers/mtd/mtdpart.c
+++ b/drivers/mtd/mtdpart.c
@@ -17,6 +17,7 @@
#include <linux/mtd/partitions.h>
#include <linux/err.h>
#include <linux/of.h>
+#include <linux/of_platform.h>
#include "mtdcore.h"
@@ -577,10 +578,16 @@ static int mtd_part_of_parse(struct mtd_info *master,
struct mtd_part_parser *parser;
struct device_node *np;
struct property *prop;
+ struct device *dev;
const char *compat;
const char *fixed = "fixed-partitions";
int ret, err = 0;
+ dev = &master->dev;
+ /* Use parent device (controller) if the top level MTD is not registered */
+ if (!IS_ENABLED(CONFIG_MTD_PARTITIONED_MASTER) && !mtd_is_partition(master))
+ dev = master->dev.parent;
+
np = mtd_get_of_node(master);
if (mtd_is_partition(master))
of_node_get(np);
@@ -593,6 +600,7 @@ static int mtd_part_of_parse(struct mtd_info *master,
continue;
ret = mtd_part_do_parse(parser, master, pparts, NULL);
if (ret > 0) {
+ of_platform_populate(np, NULL, NULL, dev);
of_node_put(np);
return ret;
}
@@ -600,6 +608,7 @@ static int mtd_part_of_parse(struct mtd_info *master,
if (ret < 0 && !err)
err = ret;
}
+ of_platform_populate(np, NULL, NULL, dev);
of_node_put(np);
/*