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Subject[PATCH 11/23] mtd: add mtd_eccpos(), mtd_oobfree() and mtd_eccbytes() helper functions
Date
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 <boris.brezillon@free-electrons.com>
---
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


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