iface-modem: add hook to load hardware revision

src/mm-iface-modem.c

@@ -3831,6 +3831,7 @@ typedef enum {
     INITIALIZATION_STEP_MANUFACTURER,
     INITIALIZATION_STEP_MODEL,
     INITIALIZATION_STEP_REVISION,
+    INITIALIZATION_STEP_HARDWARE_REVISION,
     INITIALIZATION_STEP_EQUIPMENT_ID,
     INITIALIZATION_STEP_DEVICE_ID,
     INITIALIZATION_STEP_SUPPORTED_MODES,
@@ -4050,6 +4051,7 @@ load_supported_capabilities_ready (MMIfaceModem *self,
 STR_REPLY_READY_FN (manufacturer, "Manufacturer")
 STR_REPLY_READY_FN (model, "Model")
 STR_REPLY_READY_FN (revision, "Revision")
+STR_REPLY_READY_FN (hardware_revision, "HardwareRevision")
 STR_REPLY_READY_FN (equipment_identifier, "Equipment Identifier")
 STR_REPLY_READY_FN (device_identifier, "Device Identifier")
 
@@ -4587,6 +4589,22 @@ interface_initialization_step (GTask *task)
         /* Fall down to next step */
         ctx->step++;
 
+    case INITIALIZATION_STEP_HARDWARE_REVISION:
+        /* HardwareRevision is meant to be loaded only once during the whole
+         * lifetime of the modem. Therefore, if we already have them loaded,
+         * don't try to load them again. */
+        if (mm_gdbus_modem_get_hardware_revision (ctx->skeleton) == NULL &&
+            MM_IFACE_MODEM_GET_INTERFACE (self)->load_hardware_revision &&
+            MM_IFACE_MODEM_GET_INTERFACE (self)->load_hardware_revision_finish) {
+            MM_IFACE_MODEM_GET_INTERFACE (self)->load_hardware_revision (
+                self,
+                (GAsyncReadyCallback)load_hardware_revision_ready,
+                task);
+            return;
+        }
+        /* Fall down to next step */
+        ctx->step++;
+
     case INITIALIZATION_STEP_EQUIPMENT_ID:
         /* Equipment ID is meant to be loaded only once during the whole
          * lifetime of the modem. Therefore, if we already have them loaded,

src/mm-iface-modem.h

@@ -84,6 +84,14 @@ struct _MMIfaceModem {
                                      GAsyncResult *res,
                                      GError **error);
 
+    /* Loading of the HardwareRevision property */
+    void (*load_hardware_revision) (MMIfaceModem *self,
+                                    GAsyncReadyCallback callback,
+                                    gpointer user_data);
+    gchar * (*load_hardware_revision_finish) (MMIfaceModem *self,
+                                              GAsyncResult *res,
+                                              GError **error);
+
     /* Loading of the EquipmentIdentifier property */
     void (*load_equipment_identifier) (MMIfaceModem *self,
                                        GAsyncReadyCallback callback,