diff -ur libhardware/include/hardware/gps.h libhardware_mtk/include/hardware/gps.h
--- libhardware/include/hardware/gps.h	2016-01-22 15:47:44.063878000 -0800
+++ libhardware_mtk/include/hardware/gps.h	2016-01-23 05:25:12.364466000 -0800
@@ -37,6 +37,9 @@
 /** Milliseconds since January 1, 1970 */
 typedef int64_t GpsUtcTime;
 
+/** Maximum number of GNSS SVs for gps_sv_status_callback(). */
+#define GNSS_MAX_SVS 256
+
 /** Maximum number of SVs for gps_sv_status_callback(). */
 #define GPS_MAX_SVS 32
 
@@ -482,6 +485,33 @@
     float   azimuth;
 } GpsSvInfo;
 
+
+/** Represents GNSS SV information. */
+typedef struct {
+    /** set to sizeof(GnssSvInfo) */
+    size_t          size;
+    /** Pseudo-random number for the SV. */
+    int     prn;
+    /** Signal to noise ratio. */
+    float   snr;
+    /** Elevation of SV in degrees. */
+    float   elevation;
+    /** Azimuth of SV in degrees. */
+    float   azimuth;
+    /**
+     * SVs have ephemeris data.
+     */
+    bool has_ephemeris;
+    /**
+     * SVs have almanac data.
+     */
+    bool has_almanac;
+    /**
+     * SVs were used for computing the most recent position fix.
+     */
+    bool used_in_fix;
+} GnssSvInfo;
+
 /** Represents SV status. */
 typedef struct {
     /** set to sizeof(GpsSvStatus) */
@@ -511,6 +541,18 @@
 } GpsSvStatus;
 
 
+/** Represents GNSS SV status. */
+typedef struct {
+    /** set to sizeof(GnssSvStatus) */
+    size_t          size;
+
+    /** Number of SVs currently visible. */
+    int         num_svs;
+
+    /** Contains an array of GNSS SV information. */
+    GnssSvInfo   sv_list[GNSS_MAX_SVS];
+} GnssSvStatus;
+
 /* 2G and 3G */
 /* In 3G lac is discarded */
 typedef struct {
@@ -550,6 +592,12 @@
  */
 typedef void (* gps_sv_status_callback)(GpsSvStatus* sv_info);
 
+/**
+ * Callback with GNSS SV status information.
+ * Can only be called from a thread created by create_thread_cb.
+ */
+typedef void (* gnss_sv_status_callback)(GnssSvStatus* sv_info);
+
 /** Callback for reporting NMEA sentences.
  *  Can only be called from a thread created by create_thread_cb.
  */
@@ -583,6 +631,7 @@
     gps_location_callback location_cb;
     gps_status_callback status_cb;
     gps_sv_status_callback sv_status_cb;
+    gnss_sv_status_callback gnss_sv_status_cb;
     gps_nmea_callback nmea_cb;
     gps_set_capabilities set_capabilities_cb;
     gps_acquire_wakelock acquire_wakelock_cb;