[PATCH] driver: mtd: update struct map_info's swap as per map requirement.

Prabhakar Kushwaha prabhakar.kushwaha at nxp.com
Thu May 4 00:20:37 PDT 2017

It is not necessary for all device's maps to be CFI_HOST_ENDIAN. Maps device
can be Bigendian or little endian.

Currently it is being taken care using CONFIG_MTD_CFI_LE_BYTE_SWAP or
CONFIG_MTD_CFI_BE_BYTE_SWAP i.e. compile time.

Now update struct map_info's swap field based on device characteristics
defined in device tree.

Signed-off-by: Prabhakar Kushwaha <prabhakar.kushwaha at nxp.com>
 drivers/mtd/maps/physmap_of.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/mtd/maps/physmap_of.c b/drivers/mtd/maps/physmap_of.c
index 14e8909..f39607d 100644
--- a/drivers/mtd/maps/physmap_of.c
+++ b/drivers/mtd/maps/physmap_of.c
@@ -20,6 +20,7 @@
 #include <linux/mtd/map.h>
 #include <linux/mtd/partitions.h>
 #include <linux/mtd/concat.h>
+#include <linux/mtd/cfi_endian.h>
 #include <linux/of.h>
 #include <linux/of_address.h>
 #include <linux/of_platform.h>
@@ -243,6 +244,9 @@ static int of_flash_probe(struct platform_device *dev)
 		info->list[i].map.bankwidth = be32_to_cpup(width);
 		info->list[i].map.device_node = dp;
+		if (of_property_read_bool(dp->parent, "big-endian"))
+			info->list[i].map.swap = CFI_BIG_ENDIAN;
 		err = of_flash_probe_gemini(dev, dp, &info->list[i].map);
 		if (err)
 			return err;

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