powerpc/mpic: create mpic subsystem object

Register a mpic subsystem at /sys/devices/system/

Signed-off-by: Wang Dongsheng <dongsheng.wang@freescale.com>
Signed-off-by: Scott Wood <scottwood@freescale.com>

2 files changed, 10 insertions, 0 deletions

diff --git a/arch/powerpc/include/asm/mpic.h b/arch/powerpc/include/asm/mpic.h
index ea6bf7220da9..4a1ac9fbf186 100644
--- a/arch/powerpc/include/asm/mpic.h
+++ b/arch/powerpc/include/asm/mpic.h
@@ -339,6 +339,8 @@ struct mpic
 #endif
 };
 
+extern struct bus_type mpic_subsys;
+
 /*
  * MPIC flags (passed to mpic_alloc)
  *
diff --git a/arch/powerpc/sysdev/mpic.c b/arch/powerpc/sysdev/mpic.c
index 4635d11f2dc2..1be54faf60dd 100644
--- a/arch/powerpc/sysdev/mpic.c
+++ b/arch/powerpc/sysdev/mpic.c
@@ -48,6 +48,12 @@
 #define DBG(fmt...)
 #endif
 
+struct bus_type mpic_subsys = {
+        .name = "mpic",
+        .dev_name = "mpic",
+};
+EXPORT_SYMBOL_GPL(mpic_subsys);
+
 static struct mpic *mpics;
 static struct mpic *mpic_primary;
 static DEFINE_RAW_SPINLOCK(mpic_lock);
@@ -2035,6 +2041,8 @@ static struct syscore_ops mpic_syscore_ops = {
 static int mpic_init_sys(void)
 {
         register_syscore_ops(&mpic_syscore_ops);
+        subsys_system_register(&mpic_subsys, NULL);
+
         return 0;
 }