Commit e79265ba authored by Josh Wu's avatar Josh Wu Committed by David Woodhouse

mtd: ofpart: add compatible check for child nodes

In case that the nand device will support some features like Nand Flash
Controller, we want to make the sub feature as a sub node of nand device.

Use such organization it is easy to enable/disable feature, also it is back
compatible and more readable.

If the sub-node has a compatible property then it is a driver not partition.
Signed-off-by: default avatarJosh Wu <josh.wu@atmel.com>
Acked-by: default avatarBrian Norris <computersforpeace@gmail.com>
Acked-by: default avatarJean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Signed-off-by: default avatarArtem Bityutskiy <artem.bityutskiy@linux.intel.com>
[ added a missing newline -Brian ]
Signed-off-by: default avatarBrian Norris <computersforpeace@gmail.com>
Signed-off-by: default avatarDavid Woodhouse <David.Woodhouse@intel.com>
parent 6054d4d5
......@@ -4,6 +4,7 @@ Partitions can be represented by sub-nodes of an mtd device. This can be used
on platforms which have strong conventions about which portions of a flash are
used for what purposes, but which don't use an on-flash partition table such
as RedBoot.
NOTE: if the sub-node has a compatible string, then it is not a partition.
#address-cells & #size-cells must both be present in the mtd device. There are
two valid values for both:
......
......@@ -20,6 +20,11 @@
#include <linux/slab.h>
#include <linux/mtd/partitions.h>
static bool node_has_compatible(struct device_node *pp)
{
return of_get_property(pp, "compatible", NULL);
}
static int parse_ofpart_partitions(struct mtd_info *master,
struct mtd_partition **pparts,
struct mtd_part_parser_data *data)
......@@ -40,8 +45,12 @@ static int parse_ofpart_partitions(struct mtd_info *master,
/* First count the subnodes */
pp = NULL;
nr_parts = 0;
while ((pp = of_get_next_child(node, pp)))
while ((pp = of_get_next_child(node, pp))) {
if (node_has_compatible(pp))
continue;
nr_parts++;
}
if (nr_parts == 0)
return 0;
......@@ -57,6 +66,9 @@ static int parse_ofpart_partitions(struct mtd_info *master,
int len;
int a_cells, s_cells;
if (node_has_compatible(pp))
continue;
reg = of_get_property(pp, "reg", &len);
if (!reg) {
nr_parts--;
......
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