3 files changed, 13 insertions, 2 deletions
diff --git a/host/lib/usrp/x300/x300_impl.cpp b/host/lib/usrp/x300/x300_impl.cpp
index 1e424414e..ebb9bf3a6 100644
--- a/host/lib/usrp/x300/x300_impl.cpp
+++ b/host/lib/usrp/x300/x300_impl.cpp
@@ -764,8 +764,8 @@ void x300_impl::setup_mb(const size_t mb_i, const uhd::device_addr_t &dev_addr)
     ////////////////////////////////////////////////////////////////////
     _tree->create<time_spec_t>(mb_path / "time" / "now")
         .publish(boost::bind(&time_core_3000::get_time_now, mb.radio_perifs[0].time64))
-        .subscribe(boost::bind(&time_core_3000::set_time_now, mb.radio_perifs[0].time64, _1))
-        .subscribe(boost::bind(&time_core_3000::set_time_now, mb.radio_perifs[1].time64, _1));
+        .subscribe(boost::bind(&x300_impl::sync_times, this, mb, _1))
+        .set(0.0);
     _tree->create<time_spec_t>(mb_path / "time" / "pps")
         .publish(boost::bind(&time_core_3000::get_time_last_pps, mb.radio_perifs[0].time64))
         .subscribe(boost::bind(&time_core_3000::set_time_next_pps, mb.radio_perifs[0].time64, _1))
@@ -1457,6 +1457,14 @@ void x300_impl::update_time_source(mboard_members_t &mb, const std::string &sour
     */
 }
 
+void x300_impl::sync_times(mboard_members_t &mb, const uhd::time_spec_t& t)
+{
+    BOOST_FOREACH(radio_perifs_t &perif, mb.radio_perifs)
+        perif.time64->set_time_sync(t);
+    mb.fw_regmap->clock_ctrl_reg.write(fw_regmap_t::clk_ctrl_reg_t::TIME_SYNC, 1);
+    mb.fw_regmap->clock_ctrl_reg.write(fw_regmap_t::clk_ctrl_reg_t::TIME_SYNC, 0);
+}
+
 bool x300_impl::wait_for_clk_locked(mboard_members_t& mb, boost::uint32_t which, double timeout)
 {
     boost::system_time timeout_time = boost::get_system_time() + boost::posix_time::milliseconds(timeout * 1000.0);
diff --git a/host/lib/usrp/x300/x300_impl.hpp b/host/lib/usrp/x300/x300_impl.hpp
index 1630047af..67afa77ee 100644
--- a/host/lib/usrp/x300/x300_impl.hpp
+++ b/host/lib/usrp/x300/x300_impl.hpp
@@ -354,6 +354,7 @@ private:
     void set_time_source_out(mboard_members_t&, const bool);
     void update_clock_source(mboard_members_t&, const std::string &);
     void update_time_source(mboard_members_t&, const std::string &);
+    void sync_times(mboard_members_t&, const uhd::time_spec_t&);
 
     uhd::sensor_value_t get_ref_locked(mboard_members_t& mb);
     bool wait_for_clk_locked(mboard_members_t& mb, boost::uint32_t which, double timeout);
diff --git a/host/lib/usrp/x300/x300_regs.hpp b/host/lib/usrp/x300/x300_regs.hpp
index eba30abb5..3e0966c83 100644
--- a/host/lib/usrp/x300/x300_regs.hpp
+++ b/host/lib/usrp/x300/x300_regs.hpp
@@ -209,6 +209,7 @@ namespace uhd { namespace usrp { namespace x300 {
             UHD_DEFINE_SOFT_REG_FIELD(PPS_OUT_EN,   /*width*/ 1, /*shift*/ 4);  //[4]
             UHD_DEFINE_SOFT_REG_FIELD(TCXO_EN,      /*width*/ 1, /*shift*/ 5);  //[5]
             UHD_DEFINE_SOFT_REG_FIELD(GPSDO_PWR_EN, /*width*/ 1, /*shift*/ 6);  //[6]
+            UHD_DEFINE_SOFT_REG_FIELD(TIME_SYNC,    /*width*/ 1, /*shift*/ 7);  //[7]
 
             static const boost::uint32_t SRC_EXTERNAL = 0x0;
             static const boost::uint32_t SRC_INTERNAL = 0x2;
@@ -221,6 +222,7 @@ namespace uhd { namespace usrp { namespace x300 {
                 set(PPS_OUT_EN, 0);
                 set(TCXO_EN, 1);
                 set(GPSDO_PWR_EN, 1);   //GPSDO power always ON
+                set(TIME_SYNC, 0);
             }
         } clock_ctrl_reg;