[PATCH v2 3/4] powerpc/mpic: create mpic subsystem object

[Wang Dongsheng]

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

Signed-off-by: Wang Dongsheng <dongsheng.wang at freescale.com>
---
 arch/powerpc/include/asm/mpic.h | 2 ++
 arch/powerpc/sysdev/mpic.c      | 8 ++++++++
 2 files changed, 10 insertions(+)

diff --git a/arch/powerpc/include/asm/mpic.h b/arch/powerpc/include/asm/mpic.h
index c0f9ef9..fa70e9b 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 50d1ee1..f07cfe0 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);
@@ -1989,6 +1995,8 @@ 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;
 }
 
-- 
1.8.0