Make SerialMM a regular sysbus device, by registering the irq, and the
mmio region. Reexport the internal serial properties.

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
---
 hw/char/serial.c | 35 ++++++++++++++++++++++++-----------
 1 file changed, 24 insertions(+), 11 deletions(-)

diff --git a/hw/char/serial.c b/hw/char/serial.c
index 1c16fed4d1..e0f1a99e8b 100644
--- a/hw/char/serial.c
+++ b/hw/char/serial.c
@@ -1073,21 +1073,18 @@ SerialMM *serial_mm_init(MemoryRegion *address_space,
                             Chardev *chr, enum device_endian end)
 {
     SerialMM *smm = SERIAL_MM(qdev_create(NULL, TYPE_SERIAL_MM));
-    SerialState *s = &smm->serial;
+    MemoryRegion *mr;
 
     qdev_prop_set_uint8(DEVICE(smm), "regshift", regshift);
-    s->irq = irq;
-    qdev_prop_set_uint32(DEVICE(s), "baudbase", baudbase);
-    qdev_prop_set_chr(DEVICE(s), "chardev", chr);
-    qdev_set_legacy_instance_id(DEVICE(s), base, 2);
-    qdev_prop_set_uint8(DEVICE(self), "endianness", end);
-
-    qdev_init_nofail(DEVICE(s));
+    qdev_prop_set_uint32(DEVICE(smm), "baudbase", baudbase);
+    qdev_prop_set_chr(DEVICE(smm), "chardev", chr);
+    qdev_set_legacy_instance_id(DEVICE(smm), base, 2);
+    qdev_prop_set_uint8(DEVICE(smm), "endianness", end);
     qdev_init_nofail(DEVICE(smm));
 
-    memory_region_init_io(&s->io, NULL, &serial_mm_ops[end], smm,
-                          "serial", 8 << regshift);
-    memory_region_add_subregion(address_space, base, &s->io);
+    sysbus_connect_irq(SYS_BUS_DEVICE(smm), 0, irq);
+    mr = sysbus_mmio_get_region(SYS_BUS_DEVICE(smm), 0);
+    memory_region_add_subregion(address_space, base, mr);
 
     return smm;
 }
@@ -1098,6 +1095,8 @@ static void serial_mm_instance_init(Object *o)
 
     object_initialize_child(o, "serial", &smm->serial, sizeof(smm->serial),
                             TYPE_SERIAL, &error_abort, NULL);
+
+    qdev_alias_all_properties(DEVICE(&smm->serial), o);
 }
 
 static Property serial_mm_properties[] = {
@@ -1111,11 +1110,25 @@ static Property serial_mm_properties[] = {
     DEFINE_PROP_END_OF_LIST(),
 };
 
+static void serial_mm_realize(DeviceState *dev, Error **errp)
+{
+    SerialMM *smm = SERIAL_MM(dev);
+    SerialState *s = &smm->serial;
+
+    qdev_init_nofail(DEVICE(s));
+
+    memory_region_init_io(&s->io, NULL, &serial_mm_ops[smm->endianness], smm,
+                          "serial", 8 << smm->regshift);
+    sysbus_init_mmio(SYS_BUS_DEVICE(smm), &s->io);
+    sysbus_init_irq(SYS_BUS_DEVICE(smm), &smm->serial.irq);
+}
+
 static void serial_mm_class_init(ObjectClass *klass, void* data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
     dc->props = serial_mm_properties;
+    dc->realize = serial_mm_realize;
 }
 
 static const TypeInfo serial_mm_info = {
-- 
2.24.0