From: Brian Norris <computersforpeace@xxxxxxxxx> Partition parsers can now provide an of_match_table to enable flash<-->parser matching via device tree. This support is currently limited to built-in parsers as it uses request_module() and friends. This should be sufficient for most cases though as compiling parsers as modules isn't a common choice. Signed-off-by: Brian Norris <computersforpeace@xxxxxxxxx> Signed-off-by: Rafał Miłecki <rafal@xxxxxxxxxx> --- drivers/mtd/mtdpart.c | 47 ++++++++++++++++++++++++++++++++++++++++++ include/linux/mtd/partitions.h | 1 + 2 files changed, 48 insertions(+) diff --git a/drivers/mtd/mtdpart.c b/drivers/mtd/mtdpart.c index 73c52f1a2e4c..d0cb1a892ed2 100644 --- a/drivers/mtd/mtdpart.c +++ b/drivers/mtd/mtdpart.c @@ -861,6 +861,41 @@ static int mtd_part_do_parse(struct mtd_part_parser *parser, return ret; } +static bool of_mtd_match_mtd_parser(struct mtd_info *mtd, + struct mtd_part_parser *parser) +{ + struct device_node *np; + bool ret; + + np = mtd_get_of_node(mtd); + np = of_get_child_by_name(np, "partitions"); + + ret = !!of_match_node(parser->of_match_table, np); + + of_node_put(np); + + return ret; +} + +static struct mtd_part_parser *mtd_part_get_parser_by_of(struct mtd_info *mtd) +{ + struct mtd_part_parser *p, *ret = NULL; + + spin_lock(&part_parser_lock); + + list_for_each_entry(p, &part_parsers, list) { + if (of_mtd_match_mtd_parser(mtd, p) && + try_module_get(p->owner)) { + ret = p; + break; + } + } + + spin_unlock(&part_parser_lock); + + return ret; +} + /** * parse_mtd_partitions - parse MTD partitions * @master: the master partition (describes whole MTD device) @@ -913,6 +948,18 @@ int parse_mtd_partitions(struct mtd_info *master, const char *const *types, if (ret < 0 && !err) err = ret; } + + parser = mtd_part_get_parser_by_of(master); + if (!parser) + return err; + + ret = mtd_part_do_parse(parser, master, pparts, data); + if (ret > 0) + return 0; + mtd_part_parser_put(parser); + if (ret < 0 && !err) + err = ret; + return err; } diff --git a/include/linux/mtd/partitions.h b/include/linux/mtd/partitions.h index 2787e76c030f..073e1d8d5d17 100644 --- a/include/linux/mtd/partitions.h +++ b/include/linux/mtd/partitions.h @@ -77,6 +77,7 @@ struct mtd_part_parser { struct list_head list; struct module *owner; const char *name; + const struct of_device_id *of_match_table; int (*parse_fn)(struct mtd_info *, const struct mtd_partition **, struct mtd_part_parser_data *); void (*cleanup)(const struct mtd_partition *pparts, int nr_parts); -- 2.11.0 -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html