[UBOOT PATCH v3] mtd: nand: arasan: Print warning for unsupported ecc modes

[Venkatesh Yadav Abbarapu]

Currently only hw ecc is supported in U-Boot. If any other ecc mode is
given in DT, it simply ignores and switches to hw ecc. So better print
what is being done.

Revert this patch once soft ecc support is fixed in future.

Signed-off-by: Ashok Reddy Soma <ashok.reddy.soma at amd.com>
Signed-off-by: Venkatesh Yadav Abbarapu <venkatesh.abbarapu at amd.com>
---
Changes in v2:
- Added the ecc mode check in the arasan driver itself.
Changes in v3:
- Skip the driver probe when sw-ecc mode is present in the device tree.
---
 drivers/mtd/nand/raw/arasan_nfc.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/drivers/mtd/nand/raw/arasan_nfc.c b/drivers/mtd/nand/raw/arasan_nfc.c
index 14766401bf..426160c384 100644
--- a/drivers/mtd/nand/raw/arasan_nfc.c
+++ b/drivers/mtd/nand/raw/arasan_nfc.c
@@ -1233,6 +1233,7 @@ static int arasan_probe(struct udevice *dev)
 	struct mtd_info *mtd;
 	ofnode child;
 	int err = -1;
+	const char *str;
 
 	info->reg = dev_read_addr_ptr(dev);
 	mtd = nand_to_mtd(nand_chip);
@@ -1263,6 +1264,12 @@ static int arasan_probe(struct udevice *dev)
 		goto fail;
 	}
 
+	str = ofnode_read_string(nand_chip->flash_node, "nand-ecc-mode");
+	if (strcmp(str, "hw")) {
+		printf("%s ecc is not supported, switch to hw ecc\n", str);
+		return -EINVAL;
+	}
+
 	nand_chip->ecc.mode = NAND_ECC_HW;
 	nand_chip->ecc.hwctl = NULL;
 	nand_chip->ecc.read_page = arasan_nand_read_page_hwecc;
-- 
2.25.1