From 1a920bce8160ad3389c8ba7940cff7f07317f7cf Mon Sep 17 00:00:00 2001
From: Josh Blum <josh@joshknows.com>
Date: Thu, 8 Nov 2012 18:46:24 -0800
Subject: uhd: added args member to tune_request object

---
 host/include/uhd/types/tune_request.hpp | 15 ++++++++++++++-
 1 file changed, 14 insertions(+), 1 deletion(-)

diff --git a/host/include/uhd/types/tune_request.hpp b/host/include/uhd/types/tune_request.hpp
index 9c498bfe9..dd6123a9f 100644
--- a/host/include/uhd/types/tune_request.hpp
+++ b/host/include/uhd/types/tune_request.hpp
@@ -1,5 +1,5 @@
 //
-// Copyright 2010 Ettus Research LLC
+// Copyright 2010-2012 Ettus Research LLC
 //
 // This program is free software: you can redistribute it and/or modify
 // it under the terms of the GNU General Public License as published by
@@ -19,6 +19,7 @@
 #define INCLUDED_UHD_TYPES_TUNE_REQUEST_HPP
 
 #include <uhd/config.hpp>
+#include <uhd/types/device_addr.hpp>
 
 namespace uhd{
 
@@ -88,6 +89,18 @@ namespace uhd{
          */
         double dsp_freq;
 
+        /*!
+         * The args parameter is used to pass arbitrary key/value pairs.
+         * Possible keys used by args (depends on implementation):
+         *
+         * - mode_n: Allows the user to tell the daughterboard tune code
+         * to choose between an integer N diviver or fractional N divider.
+         * Default is fractional N on boards that support fractional N tuning.
+         * Fractional N provides greater tuning acuracy at the expense of spurs.
+         * Possible options for this key: "integer" or "fractional".
+         */
+        device_addr_t args;
+
     };
 
 } //namespace uhd
-- 
cgit v1.2.3


From 43e0bd799e5f3dbee8429b16b61b88d25ae2f957 Mon Sep 17 00:00:00 2001
From: Josh Blum <josh@joshknows.com>
Date: Thu, 8 Nov 2012 18:46:57 -0800
Subject: usrp: poke tune args into dboards that support it

---
 host/lib/usrp/multi_usrp.cpp | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/host/lib/usrp/multi_usrp.cpp b/host/lib/usrp/multi_usrp.cpp
index 0331cf93a..46dd8b670 100644
--- a/host/lib/usrp/multi_usrp.cpp
+++ b/host/lib/usrp/multi_usrp.cpp
@@ -139,6 +139,14 @@ static tune_result_t tune_xx_subdev_and_dsp(
         if (bw > rate) lo_offset = std::min((bw - rate)/2, rate/2);
     }
 
+    //------------------------------------------------------------------
+    //-- poke the tune request args into the dboard
+    //------------------------------------------------------------------
+    if (rf_fe_subtree->exists("tune_args"))
+    {
+        rf_fe_subtree->access<device_addr_t>("tune_args").set(tune_request.args);
+    }
+
     //------------------------------------------------------------------
     //-- set the RF frequency depending upon the policy
     //------------------------------------------------------------------
-- 
cgit v1.2.3