From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-pa0-x236.google.com ([2607:f8b0:400e:c03::236]) by bombadil.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1b0YEu-0006tZ-JT for linux-mtd@lists.infradead.org; Wed, 11 May 2016 17:48:05 +0000 Received: by mail-pa0-x236.google.com with SMTP id xk12so20159459pac.0 for ; Wed, 11 May 2016 10:47:43 -0700 (PDT) From: Moritz Fischer To: dwmw2@infradead.org Cc: computersforpeace@gmail.com, linux-mtd@lists.infradead.org, linux-kernel@vger.kernel.org, moritz.fischer.private@gmail.com, Moritz Fischer Subject: [PATCH] mtd: Adding of_mtd_info_get to get mtd_info from devicetree Date: Wed, 11 May 2016 10:47:39 -0700 Message-Id: <1462988859-32240-1-git-send-email-moritz.fischer@ettus.com> List-Id: Linux MTD discussion mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , 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 --- 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