From 9b269b1b5612ddb9dd4acf774aeb15b770dca4cd Mon Sep 17 00:00:00 2001
From: Peter Barker <pbarker@barker.dropbear.id.au>
Date: Fri, 9 Mar 2018 13:14:05 -0300
Subject: [PATCH] Rover: use AP_RTC

Rover: AP_GPS now sets the system time directly
---
 APMrover2/APMrover2.cpp |  2 --
 APMrover2/Rover.h       |  4 ----
 APMrover2/commands.cpp  | 22 ----------------------
 3 files changed, 28 deletions(-)

diff --git a/APMrover2/APMrover2.cpp b/APMrover2/APMrover2.cpp
index fa9dbd3797..b887ab39fe 100644
--- a/APMrover2/APMrover2.cpp
+++ b/APMrover2/APMrover2.cpp
@@ -306,8 +306,6 @@ void Rover::update_GPS(void)
     if (gps.last_message_time_ms() != last_gps_msg_ms) {
         last_gps_msg_ms = gps.last_message_time_ms();
 
-        // set system time if necessary
-        set_system_time_from_GPS();
 #if CAMERA == ENABLED
         camera.update();
 #endif
diff --git a/APMrover2/Rover.h b/APMrover2/Rover.h
index f94b27d843..b5f323802b 100644
--- a/APMrover2/Rover.h
+++ b/APMrover2/Rover.h
@@ -317,9 +317,6 @@ private:
     // The home location used for RTL.  The location is set when we first get stable GPS lock
     const struct Location &home;
 
-    // true if the system time has been set from the GPS
-    bool system_time_set;
-
     // true if the compass's initial location has been set
     bool compass_init_location;
 
@@ -427,7 +424,6 @@ private:
     void update_home_from_EKF();
     bool set_home_to_current_location(bool lock);
     bool set_home(const Location& loc, bool lock);
-    void set_system_time_from_GPS();
     void update_home();
 
     // compat.cpp
diff --git a/APMrover2/commands.cpp b/APMrover2/commands.cpp
index 1dc31abbb4..43056083d9 100644
--- a/APMrover2/commands.cpp
+++ b/APMrover2/commands.cpp
@@ -86,28 +86,6 @@ bool Rover::set_home(const Location& loc, bool lock)
     return true;
 }
 
-// checks if we should update ahrs/RTL home position from GPS
-void Rover::set_system_time_from_GPS()
-{
-    // exit immediately if system time already set
-    if (system_time_set) {
-        return;
-    }
-
-    // if we have a 3d lock and valid location
-    if (gps.status() >= AP_GPS::GPS_OK_FIX_3D) {
-        // set system clock for log timestamps
-        const uint64_t gps_timestamp = gps.time_epoch_usec();
-
-        hal.util->set_system_clock(gps_timestamp);
-
-        // update signing timestamp
-        GCS_MAVLINK::update_signing_timestamp(gps_timestamp);
-
-        system_time_set = true;
-    }
-}
-
 /*
   update home location from GPS
   this is called as long as we have 3D lock and the arming switch is