mediatek: v5.15: backport spi-mem ecc support

Signed-off-by: Chuanhong Guo <gch981213@gmail.com>

1 files changed, 36 insertions, 0 deletions

diff --git a/target/linux/mediatek/patches-5.15/120-02-v5.18-mtd-nand-Add-a-new-helper-to-retrieve-the-ECC-contex.patch b/target/linux/mediatek/patches-5.15/120-02-v5.18-mtd-nand-Add-a-new-helper-to-retrieve-the-ECC-contex.patch
new file mode 100644
index 0000000000..6522507786
--- /dev/null
+++ b/target/linux/mediatek/patches-5.15/120-02-v5.18-mtd-nand-Add-a-new-helper-to-retrieve-the-ECC-contex.patch
@@ -0,0 +1,36 @@
+From 840b2f8dd2d0579e517140e1f9bbc482eaf4ed07 Mon Sep 17 00:00:00 2001
+From: Miquel Raynal <miquel.raynal@bootlin.com>
+Date: Thu, 16 Dec 2021 12:16:39 +0100
+Subject: [PATCH 02/15] mtd: nand: Add a new helper to retrieve the ECC context
+
+Introduce nand_to_ecc_ctx() which will allow to easily jump to the
+private pointer of an ECC context given a NAND device. This is very
+handy, from the prepare or finish ECC hook, to get the internal context
+out of the NAND device object.
+
+Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
+Link: https://lore.kernel.org/linux-mtd/20211216111654.238086-14-miquel.raynal@bootlin.com
+(cherry picked from commit cda32a618debd3fad8e42757b198719ae180f8f4)
+---
+ include/linux/mtd/nand.h | 5 +++++
+ 1 file changed, 5 insertions(+)
+
+diff --git a/include/linux/mtd/nand.h b/include/linux/mtd/nand.h
+index 4ddd20fe9c9e..b617efa0a881 100644
+--- a/include/linux/mtd/nand.h
++++ b/include/linux/mtd/nand.h
+@@ -990,6 +990,11 @@ int nanddev_markbad(struct nand_device *nand, const struct nand_pos *pos);
+ int nanddev_ecc_engine_init(struct nand_device *nand);
+ void nanddev_ecc_engine_cleanup(struct nand_device *nand);
+ 
++static inline void *nand_to_ecc_ctx(struct nand_device *nand)
++{
++	return nand->ecc.ctx.priv;
++}
++
+ /* BBT related functions */
+ enum nand_bbt_block_status {
+ 	NAND_BBT_BLOCK_STATUS_UNKNOWN,
+-- 
+2.35.1
+