[PATCH v2 1/2] mtd: nand: Add a helper to retrieve the number of ECC steps

[Miquel Raynal]

This operation is very common and deserves a helper. It of course only
works after the ECC engine initialization.

Signed-off-by: Miquel Raynal <miquel.raynal at bootlin.com>
---
 include/linux/mtd/nand.h | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/include/linux/mtd/nand.h b/include/linux/mtd/nand.h
index 414f8a4d2853..27e87c02971c 100644
--- a/include/linux/mtd/nand.h
+++ b/include/linux/mtd/nand.h
@@ -585,6 +585,18 @@ nanddev_get_ecc_conf(struct nand_device *nand)
 	return &nand->ecc.ctx.conf;
 }
 
+/**
+ * nanddev_get_ecc_nsteps() - Extract the actual number of ECC steps
+ * @nand: NAND device
+ */
+static inline unsigned int
+nanddev_get_ecc_nsteps(struct nand_device *nand)
+{
+	const struct nand_ecc_props *conf = nanddev_get_ecc_conf(nand);
+
+	return nanddev_page_size(nand) / conf->step_size;
+}
+
 /**
  * nanddev_get_ecc_requirements() - Extract the ECC requirements from a NAND
  *                                  device
-- 
2.20.1