[Qemu-devel] [patch 3/3] mc146818rtc: add "rtc" link to "/machine"

[mtosatti@redhat.com]

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Add a link to rtc under /machine providing a stable 
location for management apps to query "date" field.

{"execute":"qom-get","arguments":{"path":"/machine/rtc","property":"date"} }

Suggested by Paolo Bonzini.

Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>

---
 hw/timer/mc146818rtc.c |    9 +++++++++
 1 file changed, 9 insertions(+)

Index: qemu/hw/timer/mc146818rtc.c
===================================================================
--- qemu.orig/hw/timer/mc146818rtc.c	2014-06-02 23:14:11.707436729 -0300
+++ qemu/hw/timer/mc146818rtc.c	2014-06-02 23:14:15.453424684 -0300
@@ -911,6 +911,9 @@
 
     object_property_add(OBJECT(s), "date", "struct tm",
                         rtc_get_date, NULL, NULL, s, NULL);
+
+    object_property_add_alias(qdev_get_machine(), "rtc", OBJECT(s),
+                              &error_abort);
 }
 
 ISADevice *rtc_init(ISABus *bus, int base_year, qemu_irq intercept_irq)
@@ -954,11 +957,17 @@
     dc->cannot_instantiate_with_device_add_yet = true;
 }
 
+static void rtc_finalize(Object *obj)
+{
+    object_property_del(qdev_get_machine(), "rtc", NULL);
+}
+
 static const TypeInfo mc146818rtc_info = {
     .name          = TYPE_MC146818_RTC,
     .parent        = TYPE_ISA_DEVICE,
     .instance_size = sizeof(RTCState),
     .class_init    = rtc_class_initfn,
+    .instance_finalize = rtc_finalize,
 };
 
 static void mc146818rtc_register_types(void)