[PATCH 3/3] mtd: nand: make interleaved placement optional

[Sascha Hauer <s.hauer@pengutronix.de>]

Currently only one driver in the tree (denali.c) needs interleaved
layout support. Make support for it optional to safe a few bytes
of binary space when interleaved support is not needed.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
---
 drivers/mtd/nand/raw/Kconfig     | 4 ++++
 drivers/mtd/nand/raw/nand_base.c | 2 ++
 2 files changed, 6 insertions(+)

diff --git a/drivers/mtd/nand/raw/Kconfig b/drivers/mtd/nand/raw/Kconfig
index e9d1b83706..b6c6e62731 100644
--- a/drivers/mtd/nand/raw/Kconfig
+++ b/drivers/mtd/nand/raw/Kconfig
@@ -35,6 +35,9 @@ config NAND_ALLOW_ERASE_BAD
 config NAND_NEED_EXEC_OP
 	bool
 
+config NAND_NEED_ECC_PLACEMENT_INTERLEAVED
+	bool
+
 comment "Raw/parallel NAND flash controllers"
 
 config NAND_IMX
@@ -156,6 +159,7 @@ config MTD_NAND_DENALI
 	tristate "Support Denali NAND controller"
 	depends on HAS_DMA
 	select NAND_NEED_EXEC_OP
+	select NAND_NEED_ECC_PLACEMENT_INTERLEAVED
 	help
 	  Enable support for the Denali NAND controller.  This should be
 	  combined with either the PCI or platform drivers to provide device
diff --git a/drivers/mtd/nand/raw/nand_base.c b/drivers/mtd/nand/raw/nand_base.c
index cf4d510211..5ab5e9e03a 100644
--- a/drivers/mtd/nand/raw/nand_base.c
+++ b/drivers/mtd/nand/raw/nand_base.c
@@ -5671,6 +5671,8 @@ static int nand_set_ecc_on_host_ops(struct nand_chip *chip)
 		fallthrough;
 
 	case NAND_ECC_PLACEMENT_INTERLEAVED:
+		if (!IS_ENABLED(CONFIG_NAND_NEED_ECC_PLACEMENT_INTERLEAVED))
+			break;
 		if ((!ecc->calculate || !ecc->correct || !ecc->hwctl) &&
 		    (!ecc->read_page ||
 		     ecc->read_page == nand_read_page_hwecc ||
-- 
2.39.2