Merge "contexthub: Expose CHRE version information"

import IContexthubCallback;

/*

 * The Context Hub HAL provides an interface to a separate low-power processing

 * domain that has direct access to contextual information, such as sensors.

 * Native applications that run within a context hub are known as nanoapps, and

 * they execute within the Context Hub Runtime Environment (CHRE), which is

 * standardized via the CHRE API, defined elsewhere.

 */

interface IContexthub {

    /*

     * Enumerate all available context hubs on the system.

    uint32_t maxSupportedMsgLen;// This is the maximum size of the message that can

                                // be sent to the hub in one chunk (in bytes)

    // Machine-readable CHRE platform ID, returned to nanoapps in the CHRE API

    // function call chreGetPlatformId(). The most significant 5 bytes of this

    // value identify the vendor, while the remaining bytes are set by the

    // vendor to uniquely identify each different CHRE implementation/hardware

    // that the vendor supplies. This field pairs with the patch version part of

    // chreVersion to fully specify the CHRE implementation version. See also

    // the CHRE API header file chre/version.h.

    uint64_t chrePlatformId;

    // CHRE implementation version, returned to nanoApps in the CHRE API

    // function call chreGetVersion(). This value consists of the implemented

    // CHRE API version (major version in most significant byte, followed by

    // minor version), and the platform-specific implementation patch version

    // in the lower two bytes. See also the CHRE API header file chre/version.h.

    uint32_t chreVersion;

};

struct ContextHubMsg {