This allows for getting a struct mtd_info from a node pointer, allowing mtd devices to e.g. store serial numbers or MAC addresses.
Signed-off-by: Moritz Fischer <moritz.fisc...@ettus.com> --- drivers/mtd/mtdcore.c | 21 +++++++++++++++++++++ include/linux/mtd/mtd.h | 2 ++ 2 files changed, 23 insertions(+) diff --git a/drivers/mtd/mtdcore.c b/drivers/mtd/mtdcore.c index 3096251..3d0ae65 100644 --- a/drivers/mtd/mtdcore.c +++ b/drivers/mtd/mtdcore.c @@ -363,6 +363,27 @@ unsigned mtd_mmap_capabilities(struct mtd_info *mtd) EXPORT_SYMBOL_GPL(mtd_mmap_capabilities); #endif +static int mtd_of_node_match(struct device *dev, const void *data) +{ + return dev->of_node == data; +} + +struct mtd_info *of_mtd_info_get(struct device_node *node) +{ + struct mtd_info *mtd; + struct device *d; + int ret = -ENODEV; + + d = class_find_device(&mtd_class, NULL, node, mtd_of_node_match); + if (!d) + return ERR_PTR(-ENODEV); + + mtd = container_of(d, struct mtd_info, dev); + + return mtd; +} +EXPORT_SYMBOL_GPL(of_mtd_info_get); + static int mtd_reboot_notifier(struct notifier_block *n, unsigned long state, void *cmd) { diff --git a/include/linux/mtd/mtd.h b/include/linux/mtd/mtd.h index 7712721..cce6cc7 100644 --- a/include/linux/mtd/mtd.h +++ b/include/linux/mtd/mtd.h @@ -264,6 +264,8 @@ static inline struct device_node *mtd_get_of_node(struct mtd_info *mtd) return mtd->dev.of_node; } +struct mtd_info *of_mtd_info_get(struct device_node *node); + static inline int mtd_oobavail(struct mtd_info *mtd, struct mtd_oob_ops *ops) { return ops->mode == MTD_OPS_AUTO_OOB ? mtd->oobavail : mtd->oobsize; -- 2.5.5