Putting board_nand_init() function inside NAND driver was not appropriate
due to it doesn't allow board vendor to customise their NAND
initialization code such as adding NAND lock/unlock code.

This commit was to move the board_nand_init() function from NAND driver
to board.c file. This allow customization of board_nand_init() function.

Signed-off-by: Wilson Lee <[email protected]>
Cc: Joe Hershberger <[email protected]>
Cc: Keng Soon Cheah <[email protected]>
Cc: Chen Yee Chew <[email protected]>
Cc: Albert Aribaud <[email protected]>
Cc: Michal Simek <[email protected]>
Cc: Siva Durga Prasad Paladugu <[email protected]>
Cc: Scott Wood <[email protected]>
---
 arch/arm/mach-zynq/include/mach/nand.h | 9 +++++++++
 drivers/mtd/nand/zynq_nand.c           | 6 ++++--
 2 files changed, 13 insertions(+), 2 deletions(-)
 create mode 100644 arch/arm/mach-zynq/include/mach/nand.h

diff --git a/arch/arm/mach-zynq/include/mach/nand.h 
b/arch/arm/mach-zynq/include/mach/nand.h
new file mode 100644
index 0000000..61ef45f
--- /dev/null
+++ b/arch/arm/mach-zynq/include/mach/nand.h
@@ -0,0 +1,9 @@
+/*
+ * Copyright (C) 2017 National Instruments Corp.
+ *
+ * SPDX-License-Identifier:    GPL-2.0+
+ */
+
+#include <nand.h>
+
+void zynq_nand_init(void);
diff --git a/drivers/mtd/nand/zynq_nand.c b/drivers/mtd/nand/zynq_nand.c
index dec2c41..076b878 100644
--- a/drivers/mtd/nand/zynq_nand.c
+++ b/drivers/mtd/nand/zynq_nand.c
@@ -1006,7 +1006,7 @@ static int zynq_nand_device_ready(struct mtd_info *mtd)
        return 0;
 }
 
-static int zynq_nand_init(struct nand_chip *nand_chip, int devnum)
+int zynq_nand_init(struct nand_chip *nand_chip, int devnum)
 {
        struct zynq_nand_info *xnand;
        struct mtd_info *mtd;
@@ -1192,12 +1192,14 @@ fail:
        return err;
 }
 
+#ifdef CONFIG_SYS_NAND_SELF_INIT
 static struct nand_chip nand_chip[CONFIG_SYS_MAX_NAND_DEVICE];
 
-void board_nand_init(void)
+void __weak board_nand_init(void)
 {
        struct nand_chip *nand = &nand_chip[0];
 
        if (zynq_nand_init(nand, 0))
                puts("ZYNQ NAND init failed\n");
 }
+#endif
-- 
2.7.4

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