Sensors: MultiHal: add support for HIDL
Add get_multi_hal_module_info() to support using multi-hal
functionality within the HIDL sensor implementation.
Move externally relevant constants and prototypes to new multihal.h
file.
Add new Android.bp for Treble to build multi-hal into a static
library that is now included by the HIDL sensor implementation.
Bug: 32022308
Change-Id: I2b3afa9ff1e0a2e5a098e643dde99ec86bb88206
diff --git a/modules/sensors/multihal.h b/modules/sensors/multihal.h
new file mode 100644
index 0000000..210c7cc
--- /dev/null
+++ b/modules/sensors/multihal.h
@@ -0,0 +1,26 @@
+/*
+ * Copyright (C) 2016 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+#ifndef HARDWARE_LIBHARDWARE_MODULES_SENSORS_MULTIHAL_H_
+#define HARDWARE_LIBHARDWARE_MODULES_SENSORS_MULTIHAL_H_
+
+#include <hardware/sensors.h>
+#include <hardware/hardware.h>
+
+static const char* MULTI_HAL_CONFIG_FILE_PATH = "/system/etc/sensors/hals.conf";
+
+struct sensors_module_t *get_multi_hal_module_info(void);
+
+#endif // HARDWARE_LIBHARDWARE_MODULES_SENSORS_MULTIHAL_H_