hw/i3c: keep _bytes aliases for renamed queue-capacity properties

The command-response/tx-rx/ibi queue-capacity properties were renamed
from "-bytes" to "-words".  The "-bytes" names are user-visible and
shipped in v11.0.0 (reachable via e.g.
-global driver=dw.i3c,property=tx-rx-queue-capacity-bytes,...), so
register them as aliases of the new names to keep existing command
lines working.

object_property_add_alias() forwards both reads and writes to the
target property, so the old names behave exactly as before; introspection
and qom-get/qom-set continue to work under either name.

Signed-off-by: Jithu Joseph <jithu.joseph@oss.qualcomm.com>
Reviewed-by: Jamin Lin <jamin_lin@aspeedtech.com>
Link: https://lore.kernel.org/qemu-devel/20260604142207.2118098-4-jithu.joseph@oss.qualcomm.com
Signed-off-by: Cédric Le Goater <clg@redhat.com>

diff --git a/hw/i3c/dw-i3c.c b/hw/i3c/dw-i3c.c
index 0d32d9ce78a0545148404205e99463b4a23c02d4..6386499dd9fc3493766e0bc365321bd0b373a1c3 100644 (file)
--- a/hw/i3c/dw-i3c.c
+++ b/hw/i3c/dw-i3c.c
@@ -1830,6 +1830,27 @@ static void dw_i3c_realize(DeviceState *dev, Error **errp)
     bc->ibi_finish = dw_i3c_ibi_finish;
 }
 
+/*
+ * The *-queue-capacity-bytes properties shipped in v11.0.0 under names that
+ * implied a byte count, but the values are 32-bit word counts (they are passed
+ * straight to fifo32_create()).  They were renamed to *-queue-capacity-words;
+ * keep the old names working as aliases so existing command lines using e.g.
+ * -global driver=dw.i3c,property=tx-rx-queue-capacity-bytes,... don't break.
+ */
+static void dw_i3c_init(Object *obj)
+{
+    static const char *const alias[][2] = {
+        { "command-response-queue-capacity-bytes",
+          "command-response-queue-capacity-words" },
+        { "tx-rx-queue-capacity-bytes", "tx-rx-queue-capacity-words" },
+        { "ibi-queue-capacity-bytes", "ibi-queue-capacity-words" },
+    };
+
+    for (int i = 0; i < ARRAY_SIZE(alias); i++) {
+        object_property_add_alias(obj, alias[i][0], obj, alias[i][1]);
+    }
+}
+
 static const Property dw_i3c_properties[] = {
     DEFINE_PROP_UINT8("device-id", DWI3C, cfg.id, 0),
     DEFINE_PROP_UINT8("command-response-queue-capacity-words", DWI3C,
@@ -1868,6 +1889,7 @@ static const TypeInfo dw_i3c_types[] = {
         .name = TYPE_DW_I3C,
         .parent = TYPE_SYS_BUS_DEVICE,
         .instance_size = sizeof(DWI3C),
+        .instance_init = dw_i3c_init,
         .class_init = dw_i3c_class_init,
     },
 };