[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>
diff --git a/arch/mips/au1000/common/sleeper.S b/arch/mips/au1000/common/sleeper.S
index 44dac3b..683d9da 100644
--- a/arch/mips/au1000/common/sleeper.S
+++ b/arch/mips/au1000/common/sleeper.S
@@ -112,6 +112,11 @@
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)