[U-Boot] [PATCH 5/6] SPL:Defines function required to env read for IFC & env_nand

[Prabhakar Kushwaha]

fsl_ifs_spl.c reads data from NAND and store at a memory location in raw mode.
It does not used MTD layer.
To read env variable from NAND MTD layer read/write required.

Hence, add mtd_block_isbad & nand_read_skip_bad function required during
env variable read.

Also, avoid nand_info during env read for SPL

Signed-off-by: Prabhakar Kushwaha <prabhakar at freescale.com>
---
 Based upon  git://git.denx.de/u-boot-mpc85xx.git branch next

 common/env_nand.c              |    4 ++++
 drivers/mtd/nand/fsl_ifc_spl.c |   22 ++++++++++++++++++++++
 2 files changed, 26 insertions(+)

diff --git a/common/env_nand.c b/common/env_nand.c
index 7530962..8a33552 100644
--- a/common/env_nand.c
+++ b/common/env_nand.c
@@ -245,7 +245,11 @@ int readenv(size_t offset, u_char *buf)
 	size_t blocksize, len;
 	u_char *char_ptr;
 
+#ifdef CONFIG_SPL_BUILD
+	blocksize = CONFIG_ENV_SIZE;;
+#else
 	blocksize = nand_info[0].erasesize;
+#endif
 	if (!blocksize)
 		return 1;
 
diff --git a/drivers/mtd/nand/fsl_ifc_spl.c b/drivers/mtd/nand/fsl_ifc_spl.c
index d462265..0db7142 100644
--- a/drivers/mtd/nand/fsl_ifc_spl.c
+++ b/drivers/mtd/nand/fsl_ifc_spl.c
@@ -11,6 +11,28 @@
 #include <asm/io.h>
 #include <asm/fsl_ifc.h>
 #include <linux/mtd/nand.h>
+#ifndef CONFIG_SPL_INIT_MINIMAL
+#include <linux/mtd/mtd.h>
+#endif
+
+static void nand_load(unsigned int offs, int uboot_size, uchar *dst);
+
+#ifdef CONFIG_ENV_IS_IN_NAND
+struct mtd_info nand_info[CONFIG_SYS_MAX_NAND_DEVICE];
+
+int mtd_block_isbad(struct mtd_info *mtd, loff_t ofs)
+{
+	return 0;
+}
+
+int nand_read_skip_bad(struct mtd_info *nand, loff_t offset, size_t *length,
+		size_t *actual, loff_t lim, u_char *buffer)
+{
+	nand_load(offset, *length, buffer);
+	return 0;
+}
+#endif
+
 
 static inline int is_blank(uchar *addr, int page_size)
 {
-- 
1.7.9.5