[PULL 08/36] hw/input/ps2.c: Convert TYPE_PS2_{KBD, MOUSE}_DEVICE to 3-phase reset

[Peter Maydell]

Convert the child classes TYPE_PS2_KBD_DEVICE and
TYPE_PS2_MOUSE_DEVICE to the 3-phase reset system.  This allows us to
stop using the old device_class_set_parent_reset() function.

We don't need to register an 'exit' phase function for the
subclasses, because they have no work to do in that phase.  Passing
NULL to resettable_class_set_parent_phases() will result in the
parent class method being called for that phase, so we don't need to
register a function purely to chain to the parent 'exit' phase
function.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-id: 20221109170009.3498451-3-peter.maydell@linaro.org
---
 include/hw/input/ps2.h |  2 +-
 hw/input/ps2.c         | 31 ++++++++++++++++++++-----------
 2 files changed, 21 insertions(+), 12 deletions(-)

diff --git a/include/hw/input/ps2.h b/include/hw/input/ps2.h
index ff777582cd6..cd61a634c39 100644
--- a/include/hw/input/ps2.h
+++ b/include/hw/input/ps2.h
@@ -36,7 +36,7 @@
 struct PS2DeviceClass {
     SysBusDeviceClass parent_class;
 
-    DeviceReset parent_reset;
+    ResettablePhases parent_phases;
 };
 
 /*
diff --git a/hw/input/ps2.c b/hw/input/ps2.c
index 47a5d68e300..3253ab6a92c 100644
--- a/hw/input/ps2.c
+++ b/hw/input/ps2.c
@@ -1042,13 +1042,16 @@ static void ps2_common_post_load(PS2State *s)
     q->cwptr = ccount ? (q->rptr + ccount) & (PS2_BUFFER_SIZE - 1) : -1;
 }
 
-static void ps2_kbd_reset(DeviceState *dev)
+static void ps2_kbd_reset_hold(Object *obj)
 {
-    PS2DeviceClass *ps2dc = PS2_DEVICE_GET_CLASS(dev);
-    PS2KbdState *s = PS2_KBD_DEVICE(dev);
+    PS2DeviceClass *ps2dc = PS2_DEVICE_GET_CLASS(obj);
+    PS2KbdState *s = PS2_KBD_DEVICE(obj);
 
     trace_ps2_kbd_reset(s);
-    ps2dc->parent_reset(dev);
+
+    if (ps2dc->parent_phases.hold) {
+        ps2dc->parent_phases.hold(obj);
+    }
 
     s->scan_enabled = 1;
     s->translate = 0;
@@ -1056,13 +1059,16 @@ static void ps2_kbd_reset(DeviceState *dev)
     s->modifiers = 0;
 }
 
-static void ps2_mouse_reset(DeviceState *dev)
+static void ps2_mouse_reset_hold(Object *obj)
 {
-    PS2DeviceClass *ps2dc = PS2_DEVICE_GET_CLASS(dev);
-    PS2MouseState *s = PS2_MOUSE_DEVICE(dev);
+    PS2DeviceClass *ps2dc = PS2_DEVICE_GET_CLASS(obj);
+    PS2MouseState *s = PS2_MOUSE_DEVICE(obj);
 
     trace_ps2_mouse_reset(s);
-    ps2dc->parent_reset(dev);
+
+    if (ps2dc->parent_phases.hold) {
+        ps2dc->parent_phases.hold(obj);
+    }
 
     s->mouse_status = 0;
     s->mouse_resolution = 0;
@@ -1245,10 +1251,12 @@ static void ps2_mouse_realize(DeviceState *dev, Error 
**errp)
 static void ps2_kbd_class_init(ObjectClass *klass, void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
+    ResettableClass *rc = RESETTABLE_CLASS(klass);
     PS2DeviceClass *ps2dc = PS2_DEVICE_CLASS(klass);
 
     dc->realize = ps2_kbd_realize;
-    device_class_set_parent_reset(dc, ps2_kbd_reset, &ps2dc->parent_reset);
+    resettable_class_set_parent_phases(rc, NULL, ps2_kbd_reset_hold, NULL,
+                                       &ps2dc->parent_phases);
     dc->vmsd = &vmstate_ps2_keyboard;
 }
 
@@ -1262,11 +1270,12 @@ static const TypeInfo ps2_kbd_info = {
 static void ps2_mouse_class_init(ObjectClass *klass, void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
+    ResettableClass *rc = RESETTABLE_CLASS(klass);
     PS2DeviceClass *ps2dc = PS2_DEVICE_CLASS(klass);
 
     dc->realize = ps2_mouse_realize;
-    device_class_set_parent_reset(dc, ps2_mouse_reset,
-                                  &ps2dc->parent_reset);
+    resettable_class_set_parent_phases(rc, NULL, ps2_mouse_reset_hold, NULL,
+                                       &ps2dc->parent_phases);
     dc->vmsd = &vmstate_ps2_mouse;
 }
 
-- 
2.25.1