[MIPS] add cpu_wait() to machine_halt()

Added cpu_wait() to machine_halt().
For the power reduction in halt.

Signed-off-by: Yoichi Yuasa <yoichi_yuasa@tripeaks.co.jp>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

1 files changed, 6 insertions, 1 deletions

diff --git a/arch/mips/cobalt/reset.c b/arch/mips/cobalt/reset.c
index c3d1baa5bcf1..516b4428df4e 100644
--- a/arch/mips/cobalt/reset.c
+++ b/arch/mips/cobalt/reset.c
@@ -12,6 +12,8 @@
 #include <linux/io.h>
 #include <linux/leds.h>
 
+#include <asm/processor.h>
+
 #include <cobalt.h>
 
 #define RESET_PORT      ((void __iomem *)CKSEG1ADDR(0x1c000000))
@@ -34,7 +36,10 @@ void cobalt_machine_halt(void)
         led_trigger_event(power_off_led_trigger, LED_FULL);
 
         local_irq_disable();
-        while (1) ;
+        while (1) {
+                if (cpu_wait)
+                        cpu_wait();
+        }
 }
 
 void cobalt_machine_restart(char *command)