[spinel] allow registering callback to restore vendor properties (#9773)

urrently the `RadioSpinel::RestoreProperties` only restores some
properties defined in `spinel.h`.  But if
`OPENTHREAD_SPINEL_CONFIG_VENDOR_HOOK_ENABLE` is selected, users may
set some properties of RCP via vendor command. So the radio spinel
should allow users to register a callback to restore the vendor
properties of RCP.

src/lib/spinel/radio_spinel.cpp

@@ -122,6 +122,10 @@ RadioSpinel::RadioSpinel(void)
     , mTxRadioEndUs(UINT64_MAX)
     , mRadioTimeRecalcStart(UINT64_MAX)
     , mRadioTimeOffset(UINT64_MAX)
+#if OPENTHREAD_SPINEL_CONFIG_VENDOR_HOOK_ENABLE
+    , mVendorRestorePropertiesCallback(nullptr)
+    , mVendorRestorePropertiesContext(nullptr)
+#endif
 {
     memset(mIidList, SPINEL_HEADER_INVALID_IID, sizeof(mIidList));
     memset(&mRadioSpinelMetrics, 0, sizeof(mRadioSpinelMetrics));
@@ -759,6 +763,15 @@ exit:
     LogIfFail("Failed to handle ValueIs", error);
 }
 
+#if OPENTHREAD_SPINEL_CONFIG_VENDOR_HOOK_ENABLE
+void RadioSpinel::SetVendorRestorePropertiesCallback(otRadioSpinelVendorRestorePropertiesCallback aCallback,
+                                                     void                                        *aContext)
+{
+    mVendorRestorePropertiesCallback = aCallback;
+    mVendorRestorePropertiesContext  = aContext;
+}
+#endif
+
 otError RadioSpinel::ParseRadioFrame(otRadioFrame   &aFrame,
                                      const uint8_t  *aBuffer,
                                      uint16_t        aLength,
@@ -2267,6 +2280,13 @@ void RadioSpinel::RestoreProperties(void)
         SuccessOrDie(Set(SPINEL_PROP_MAC_RX_ON_WHEN_IDLE_MODE, SPINEL_DATATYPE_BOOL_S, mRxOnWhenIdle));
     }
 
+#if OPENTHREAD_SPINEL_CONFIG_VENDOR_HOOK_ENABLE
+    if (mVendorRestorePropertiesCallback)
+    {
+        mVendorRestorePropertiesCallback(mVendorRestorePropertiesContext);
+    }
+#endif
+
     CalcRcpTimeOffset();
 }
 #endif // OPENTHREAD_SPINEL_CONFIG_RCP_RESTORATION_MAX_COUNT > 0

src/lib/spinel/radio_spinel.hpp

@@ -1084,6 +1084,24 @@ public:
      *
      */
     otError VendorHandleValueIs(spinel_prop_key_t aPropKey);
+
+    /**
+     *  A callback type for restoring vendor properties.
+     *
+     */
+    typedef void (*otRadioSpinelVendorRestorePropertiesCallback)(void *context);
+
+    /**
+     * Registers a callback to restore vendor properties.
+     *
+     * This function is used to register a callback for vendor properties recovery. When an event which needs to restore
+     * properties occurs (such as an unexpected RCP reset), the user can restore the vendor properties via the callback.
+     *
+     * @param[in] aCallback The callback.
+     * @param[in] aContext  The context.
+     *
+     */
+    void SetVendorRestorePropertiesCallback(otRadioSpinelVendorRestorePropertiesCallback aCallback, void *aContext);
 #endif
 
 private:
@@ -1331,6 +1349,11 @@ private:
     MaxPowerTable mMaxPowerTable;
 
     otRadioSpinelMetrics mRadioSpinelMetrics;
+
+#if OPENTHREAD_SPINEL_CONFIG_VENDOR_HOOK_ENABLE
+    otRadioSpinelVendorRestorePropertiesCallback mVendorRestorePropertiesCallback;
+    void                                        *mVendorRestorePropertiesContext;
+#endif
 };
 
 } // namespace Spinel