[PATCH 11/23] mtd: add mtd_eccpos(), mtd_oobfree() and mtd_eccbytes() helper functions
From: Boris Brezillon <hidden>
Date: 2015-12-07 22:27:18
Also in:
linux-mips, linux-samsung-soc, lkml
Subsystem:
memory technology devices (mtd), the rest · Maintainers:
Miquel Raynal, Richard Weinberger, Vignesh Raghavendra, Linus Torvalds
In order to make the ecclayout definition completely dynamic we need to rework the way these different ECC layouts are defined and iterated. Create the mtd_eccpos(), mtd_oobfree() and mtd_eccbytes() helpers to hide ecclayout definition internals to their users. Signed-off-by: Boris Brezillon <redacted> --- include/linux/mtd/mtd.h | 32 ++++++++++++++++++++++++++++++++ 1 file changed, 32 insertions(+)
diff --git a/include/linux/mtd/mtd.h b/include/linux/mtd/mtd.h
index 9cf13c4..25e3d0f 100644
--- a/include/linux/mtd/mtd.h
+++ b/include/linux/mtd/mtd.h@@ -253,6 +253,38 @@ struct mtd_info { int usecount; }; +static inline int mtd_eccpos(struct mtd_info *mtd, int eccbyte) +{ + if (!mtd->ecclayout) + return -ENOTSUPP; + + if (eccbyte >= mtd->ecclayout->eccbytes) + return -ERANGE; + + return mtd->ecclayout->eccpos[eccbyte]; +} + +static inline int mtd_oobfree(struct mtd_info *mtd, int section, + struct nand_oobfree *oobfree) +{ + memset(oobfree, 0, sizeof(*oobfree)); + + if (!mtd->ecclayout) + return -ENOTSUPP; + + if (section >= MTD_MAX_OOBFREE_ENTRIES_LARGE) + return -ERANGE; + + *oobfree = mtd->ecclayout->oobfree[section]; + + return 0; +} + +static inline int mtd_eccbytes(struct mtd_info *mtd) +{ + return mtd->ecclayout ? mtd->ecclayout->eccbytes : 0; +} + static inline void mtd_set_of_node(struct mtd_info *mtd, struct device_node *np) {
--
2.1.4