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From 62b613003aa4cef3f8bf9a2ec4c7709daf4dde8a Mon Sep 17 00:00:00 2001
From: Brian Norris <computersforpeace@gmail.com>
Date: Fri, 30 Oct 2015 20:33:21 -0700
Subject: [PATCH 28/33] mtd: ofpart: grab device tree node directly from master
device node
It seems more logical to use a device node directly associated with the
MTD master device (i.e., mtd->dev.of_node field) rather than requiring
auxiliary partition parser information to be passed in by the driver in
a separate struct.
This patch supports the mtd->dev.of_node field and deprecates the parser
data 'of_node' field
Driver conversions may now follow.
Additional side benefit to assigning mtd->dev.of_node rather than using
parser data: the driver core will automatically create a device -> node
symlink for us.
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Reviewed-by: Boris Brezillon <boris.brezillon@free-electrons.com>
---
drivers/mtd/ofpart.c | 18 ++++++++++--------
include/linux/mtd/partitions.h | 4 +++-
2 files changed, 13 insertions(+), 9 deletions(-)
diff --git a/drivers/mtd/ofpart.c b/drivers/mtd/ofpart.c
index 9ed6038..cf4780c 100644
--- a/drivers/mtd/ofpart.c
+++ b/drivers/mtd/ofpart.c
@@ -37,10 +37,11 @@ static int parse_ofpart_partitions(struct mtd_info *master,
bool dedicated = true;
- if (!data)
- return 0;
-
- mtd_node = data->of_node;
+ /*
+ * of_node can be provided through auxiliary parser data or (preferred)
+ * by assigning the master device node
+ */
+ mtd_node = data && data->of_node ? data->of_node : mtd_get_of_node(master);
if (!mtd_node)
return 0;
@@ -157,10 +158,11 @@ static int parse_ofoldpart_partitions(struct mtd_info *master,
} *part;
const char *names;
- if (!data)
- return 0;
-
- dp = data->of_node;
+ /*
+ * of_node can be provided through auxiliary parser data or (preferred)
+ * by assigning the master device node
+ */
+ dp = data && data->of_node ? data->of_node : mtd_get_of_node(master);
if (!dp)
return 0;
diff --git a/include/linux/mtd/partitions.h b/include/linux/mtd/partitions.h
index 6a35e6d..e742f34 100644
--- a/include/linux/mtd/partitions.h
+++ b/include/linux/mtd/partitions.h
@@ -56,7 +56,9 @@ struct device_node;
/**
* struct mtd_part_parser_data - used to pass data to MTD partition parsers.
* @origin: for RedBoot, start address of MTD device
- * @of_node: for OF parsers, device node containing partitioning information
+ * @of_node: for OF parsers, device node containing partitioning information.
+ * This field is deprecated, as the device node should simply be
+ * assigned to the master struct device.
*/
struct mtd_part_parser_data {
unsigned long origin;
--
2.8.1
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