rust: qom: change the parent type to an associated type

Avoid duplicated code to retrieve the QOM type strings from the
Rust type.

Reviewed-by: Zhao Liu <zhao1.liu@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

1 files changed, 4 insertions, 2 deletions

diff --git a/rust/hw/char/pl011/src/device.rs b/rust/hw/char/pl011/src/device.rs
index 0ab825b..3e29442 100644
--- a/rust/hw/char/pl011/src/device.rs
+++ b/rust/hw/char/pl011/src/device.rs
@@ -113,7 +113,8 @@ unsafe impl ObjectType for PL011State {
 }
 
 impl ObjectImpl for PL011State {
-    const PARENT_TYPE_NAME: Option<&'static CStr> = Some(<SysBusDevice as ObjectType>::TYPE_NAME);
+    type ParentType = SysBusDevice;
+
     const INSTANCE_INIT: Option<unsafe fn(&mut Self)> = Some(Self::init);
 }
 
@@ -650,7 +651,8 @@ unsafe impl ObjectType for PL011Luminary {
 }
 
 impl ObjectImpl for PL011Luminary {
-    const PARENT_TYPE_NAME: Option<&'static CStr> = Some(<PL011State as ObjectType>::TYPE_NAME);
+    type ParentType = PL011State;
+
     const INSTANCE_INIT: Option<unsafe fn(&mut Self)> = Some(Self::init);
 }