powerpc: offb: add support for foreign endianness

Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com>
Cc: "Antonino A. Daplas" <adaplas@pol.net>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Paul Mackerras <paulus@samba.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 12 insertions, 3 deletions

diff --git a/drivers/video/offb.c b/drivers/video/offb.c
index 452433d46973..d7b3dcc0dc43 100644
--- a/drivers/video/offb.c
+++ b/drivers/video/offb.c
@@ -248,7 +248,7 @@ static void __iomem *offb_map_reg(struct device_node *np, int index,
 static void __init offb_init_fb(const char *name, const char *full_name,
                                 int width, int height, int depth,
                                 int pitch, unsigned long address,
-                                struct device_node *dp)
+                                int foreign_endian, struct device_node *dp)
 {
         unsigned long res_size = pitch * height * (depth + 7) / 8;
         struct offb_par *par = &default_par;
@@ -397,7 +397,7 @@ static void __init offb_init_fb(const char *name, const char *full_name,
         info->screen_base = ioremap(address, fix->smem_len);
         info->par = par;
         info->pseudo_palette = (void *) (info + 1);
-        info->flags = FBINFO_DEFAULT;
+        info->flags = FBINFO_DEFAULT | foreign_endian;
 
         fb_alloc_cmap(&info->cmap, 256, 0);
 
@@ -424,6 +424,15 @@ static void __init offb_init_nodriver(struct device_node *dp, int no_real_node)
         u64 rstart, address = OF_BAD_ADDR;
         const u32 *pp, *addrp, *up;
         u64 asize;
+        int foreign_endian = 0;
+
+#ifdef __BIG_ENDIAN
+        if (of_get_property(dp, "little-endian", NULL))
+                foreign_endian = FBINFO_FOREIGN_ENDIAN;
+#else
+        if (of_get_property(dp, "big-endian", NULL))
+                foreign_endian = FBINFO_FOREIGN_ENDIAN;
+#endif
 
         pp = of_get_property(dp, "linux,bootx-depth", &len);
         if (pp == NULL)
@@ -509,7 +518,7 @@ static void __init offb_init_nodriver(struct device_node *dp, int no_real_node)
                 offb_init_fb(no_real_node ? "bootx" : dp->name,
                              no_real_node ? "display" : dp->full_name,
                              width, height, depth, pitch, address,
-                             no_real_node ? NULL : dp);
+                             foreign_endian, no_real_node ? NULL : dp);
         }
 }