From 8e30e81c4268103d502587de565842b9632a7965 Mon Sep 17 00:00:00 2001
From: Jinhao Gao <gaojinhao@huawei.com>
Date: Tue, 15 Feb 2022 17:02:08 +0800
Subject: [PATCH] pl031: support rtc-timer property for pl031

This patch adds the rtc-timer property for pl031, we can get the
rtc time (UTC) through qmp command "qom-get date" with this property.

Signed-off-by: Haibin Wang <wanghaibin.wang@huawei.com>
Reviewed-by: Shannon Zhao <shanon.Zhaosl@gmail.com>
Reviewed-by: Ying Fang <fangying1@huawei.com>
Signed-off-by: Keqian Zhu <zhukeqian1@huawei.com>
Signed-off-by: Jinhao Gao <gaojinhao@huawei.com>
Signed-off-by: Yuan Zhang <zhangyuan162@huawei.com>
---
 hw/rtc/pl031.c | 25 +++++++++++++++++++++++++
 1 file changed, 25 insertions(+)

diff --git a/hw/rtc/pl031.c b/hw/rtc/pl031.c
index f2e6baebba..57e9a35616 100644
--- a/hw/rtc/pl031.c
+++ b/hw/rtc/pl031.c
@@ -63,6 +63,15 @@ static uint32_t pl031_get_count(PL031State *s)
     return s->tick_offset + now / NANOSECONDS_PER_SECOND;
 }
 
+static void pl031_get_date(Object *obj, struct tm *current_tm, Error **errp)
+{
+    PL031State *s = PL031(obj);
+    time_t ti = pl031_get_count(s);
+
+    /* Changed to UTC time */
+    gmtime_r(&ti, current_tm);
+}
+
 static void pl031_set_alarm(PL031State *s)
 {
     uint32_t ticks;
@@ -202,6 +211,20 @@ static void pl031_init(Object *obj)
         qemu_clock_get_ns(rtc_clock) / NANOSECONDS_PER_SECOND;
 
     s->timer = timer_new_ns(rtc_clock, pl031_interrupt, s);
+    object_property_add_tm(OBJECT(s), "date", pl031_get_date);
+}
+
+static void pl031_realize(DeviceState *d, Error **errp)
+{
+    object_property_add_alias(qdev_get_machine(), "rtc-time",
+                              OBJECT(d), "date");
+}
+
+static void pl031_unrealize(DeviceState *d)
+{
+    if (object_property_find(qdev_get_machine(), "rtc-time")) {
+        object_property_del(qdev_get_machine(), "rtc-time");
+    }
 }
 
 static void pl031_finalize(Object *obj)
@@ -338,6 +361,8 @@ static void pl031_class_init(ObjectClass *klass, void *data)
     DeviceClass *dc = DEVICE_CLASS(klass);
 
     dc->vmsd = &vmstate_pl031;
+    dc->realize = pl031_realize;
+    dc->unrealize = pl031_unrealize;
     device_class_set_props(dc, pl031_properties);
 }
 
-- 
2.27.0