x86: mrst: Add Moorestown specific reboot/shutdown support

Moorestowns needs to use a special IPC command to reboot or shutdown the
platform.

Signed-off-by: Alek Du <alek.du@intel.com>
Signed-off-by: Alan Cox <alan@linux.intel.com>
LKML-Reference: <20101110164928.6365.94243.stgit@localhost.localdomain>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

1 files changed, 16 insertions, 0 deletions

diff --git a/arch/x86/platform/mrst/mrst.c b/arch/x86/platform/mrst/mrst.c
index e6f4473fc05..c727d97f7f3 100644
--- a/arch/x86/platform/mrst/mrst.c
+++ b/arch/x86/platform/mrst/mrst.c
@@ -35,6 +35,7 @@
 #include <asm/i8259.h>
 #include <asm/intel_scu_ipc.h>
 #include <asm/apb_timer.h>
+#include <asm/reboot.h>
 
 
 /*
@@ -268,6 +269,17 @@ static int mrst_i8042_detect(void)
         return 0;
 }
 
+/* Reboot and power off are handled by the SCU on a MID device */
+static void mrst_power_off(void)
+{
+        intel_scu_ipc_simple_command(0xf1, 1);
+}
+
+static void mrst_reboot(void)
+{
+        intel_scu_ipc_simple_command(0xf1, 0);
+}
+
 /*
  * Moorestown specific x86_init function overrides and early setup
  * calls.
@@ -293,6 +305,10 @@ void __init x86_mrst_early_setup(void)
 
         legacy_pic = &null_legacy_pic;
 
+        /* Moorestown specific power_off/restart method */
+        pm_power_off = mrst_power_off;
+        machine_ops.emergency_restart  = mrst_reboot;
+
         /* Avoid searching for BIOS MP tables */
         x86_init.mpparse.find_smp_config = x86_init_noop;
         x86_init.mpparse.get_smp_config = x86_init_uint_noop;