[Blackfin] arch: take DDR DEVWD into consideration as well for BF548

Pointed-out-by: Michael Hennerich <michael.hennerich@analog.com>
Signed-off-by: Mike Frysinger <vapier.adi@gmail.com>
Signed-off-by: Bryan Wu <cooloney@kernel.org>

1 files changed, 13 insertions, 6 deletions

diff --git a/arch/blackfin/kernel/setup.c b/arch/blackfin/kernel/setup.c
index b0ae5cd44203..8efea004aecb 100644
--- a/arch/blackfin/kernel/setup.c
+++ b/arch/blackfin/kernel/setup.c
@@ -680,13 +680,20 @@ static inline int __init get_mem_size(void)
         return EBSZ_TO_MEG(bfin_read_EBIU_SDBCTL());
 #  endif
 # elif defined(EBIU_DDRCTL1)
-        switch (bfin_read_EBIU_DDRCTL1() & 0xc0000) {
-                case DEVSZ_64:  return 64 / 8;
-                case DEVSZ_128: return 128 / 8;
-                case DEVSZ_256: return 256 / 8;
-                case DEVSZ_512: return 512 / 8;
-                default:        return 0;
+        u32 ddrctl = bfin_read_EBIU_DDRCTL1();
+        int ret = 0;
+        switch (ddrctl & 0xc0000) {
+                case DEVSZ_64:  ret = 64 / 8;
+                case DEVSZ_128: ret = 128 / 8;
+                case DEVSZ_256: ret = 256 / 8;
+                case DEVSZ_512: ret = 512 / 8;
+        }
+        switch (ddrctl & 0x30000) {
+                case DEVWD_4:  ret *= 2;
+                case DEVWD_8:  ret *= 2;
+                case DEVWD_16: break;
         }
+        return ret;
 # endif
 #endif
         BUG();