[Qemu-devel] [PATCH RFC 06/15] timer/arm_mptimer: QOM cast cleanup

["Andreas Färber" <afaerber@suse.de>]

From: Andreas Färber <andreas.faerber@web.de>

Introduce type constant and cast macro and rename
ARMMPTimerState::busdev to enforce its use.

Signed-off-by: Andreas Färber <andreas.faerber@web.de>
---
 hw/timer/arm_mptimer.c | 18 +++++++++++++-----
 1 file changed, 13 insertions(+), 5 deletions(-)

diff --git a/hw/timer/arm_mptimer.c b/hw/timer/arm_mptimer.c
index 317f5e4..588e34b 100644
--- a/hw/timer/arm_mptimer.c
+++ b/hw/timer/arm_mptimer.c
@@ -40,8 +40,15 @@ typedef struct {
     MemoryRegion iomem;
 } TimerBlock;
 
+#define TYPE_ARM_MP_TIMER "arm_mptimer"
+#define ARM_MP_TIMER(obj) \
+    OBJECT_CHECK(ARMMPTimerState, (obj), TYPE_ARM_MP_TIMER)
+
 typedef struct {
-    SysBusDevice busdev;
+    /*< private >*/
+    SysBusDevice parent_obj;
+    /*< public >*/
+
     uint32_t num_cpu;
     TimerBlock timerblock[MAX_CPUS];
     MemoryRegion iomem;
@@ -211,9 +218,9 @@ static void timerblock_reset(TimerBlock *tb)
 
 static void arm_mptimer_reset(DeviceState *dev)
 {
-    ARMMPTimerState *s =
-        FROM_SYSBUS(ARMMPTimerState, SYS_BUS_DEVICE(dev));
+    ARMMPTimerState *s = ARM_MP_TIMER(dev);
     int i;
+
     for (i = 0; i < ARRAY_SIZE(s->timerblock); i++) {
         timerblock_reset(&s->timerblock[i]);
     }
@@ -221,8 +228,9 @@ static void arm_mptimer_reset(DeviceState *dev)
 
 static int arm_mptimer_init(SysBusDevice *dev)
 {
-    ARMMPTimerState *s = FROM_SYSBUS(ARMMPTimerState, dev);
+    ARMMPTimerState *s = ARM_MP_TIMER(dev);
     int i;
+
     if (s->num_cpu < 1 || s->num_cpu > MAX_CPUS) {
         hw_error("%s: num-cpu must be between 1 and %d\n", __func__, MAX_CPUS);
     }
@@ -295,7 +303,7 @@ static void arm_mptimer_class_init(ObjectClass *klass, void *data)
 }
 
 static const TypeInfo arm_mptimer_info = {
-    .name          = "arm_mptimer",
+    .name          = TYPE_ARM_MP_TIMER,
     .parent        = TYPE_SYS_BUS_DEVICE,
     .instance_size = sizeof(ARMMPTimerState),
     .class_init    = arm_mptimer_class_init,
-- 
1.8.1.4