[MIPS] Save write-only Config.OD from being clobbered

    
Save the Config.OD bit from being clobbered by coherency_setup(). This
bit, when set, fixes various errata in the early steppings of Au1x00
SOCs.  Unfortunately, the bit was write-only on the most early of them.
In addition, also restore the bit after a wakeup from sleep.
    
Signed-off-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

1 files changed, 5 insertions, 0 deletions

diff --git a/arch/mips/au1000/common/sleeper.S b/arch/mips/au1000/common/sleeper.S
index 44dac3b0df3b..683d9da84b66 100644
--- a/arch/mips/au1000/common/sleeper.S
+++ b/arch/mips/au1000/common/sleeper.S
@@ -112,6 +112,11 @@ sdsleep:
         mtc0    k0, CP0_PAGEMASK
         lw      k0, 0x14(sp)
         mtc0    k0, CP0_CONFIG
+
+        /* We need to catch the ealry Alchemy SOCs with
+         * the write-only Config[OD] bit and set it back to one...
+         */
+        jal     au1x00_fixup_config_od
         lw      $1, PT_R1(sp)
         lw      $2, PT_R2(sp)
         lw      $3, PT_R3(sp)