Add null backendjellyfish_9.99.4jellyfish/9.99.49.99.4

Changes:
- Add null radio implementation that acts as the fallthrough default
  when the hardware implementations are not detected.
- Tweaked the probing in the tef665x implementation to not return an
  error if the I2C node is not even present. This cleans up the logs
  on start up on most platforms. These changes include some minor
  whitespace consistency clean ups.
- Added the run-by-default widget permission now that the binding
  should always work. This will ease testing, and potentially decrease
  app start up time.

Bug-AGL: SPEC-3570

Signed-off-by: Scott Murray <scott.murray@konsulko.com>
Change-Id: I3c2e60ce7272d248ab87e3b79d6a334e17fe5531

1 files changed, 12 insertions, 8 deletions

diff --git a/binding/radio_impl_tef665x.c b/binding/radio_impl_tef665x.c
index eeac170..17454b8 100644
--- a/binding/radio_impl_tef665x.c
+++ b/binding/radio_impl_tef665x.c
@@ -2144,15 +2144,19 @@ static int tef665x_init()
 {
 	char gst_pipeline_str[GST_PIPELINE_LEN];
 	int rc;
-	int ret = i2c_init(I2C_DEV, _open, &file_desc);
 
 	current_am_frequency = known_am_band_plans[am_bandplan].min;
 	current_fm_frequency = known_fm_band_plans[fm_bandplan].min;
 
+	rc = i2c_init(I2C_DEV, _open, &file_desc);
+	if(rc < 0) {
+		AFB_NOTICE("tef665x not present");
+		return -1;
+	}
 	_debug("file_desc= ", file_desc);
 
-	ret = appl_get_identification(file_desc);
-	if(ret != 1){
+	rc = appl_get_identification(file_desc);
+	if(rc != 1){
 		AFB_ERROR("no tef665x!");
 		return -1;
 	}
@@ -2187,11 +2191,11 @@ static int tef665x_init()
 	}
 
 	// Start pipeline in paused state
-	ret = gst_element_set_state(pipeline, GST_STATE_PAUSED);
-	_debug("gst_element_set_state to pause (at the begining)", ret);
+	rc = gst_element_set_state(pipeline, GST_STATE_PAUSED);
+	_debug("gst_element_set_state to pause (at the begining)", rc);
 
-	ret = gst_bus_add_watch(gst_element_get_bus(pipeline), (GstBusFunc) handle_message, NULL);
-	_debug("gst_bus_add_watch   ret", ret);
+	rc = gst_bus_add_watch(gst_element_get_bus(pipeline), (GstBusFunc) handle_message, NULL);
+	_debug("gst_bus_add_watch   rc", rc);
 
 	present = true;
 
@@ -2200,7 +2204,7 @@ static int tef665x_init()
 	pthread_mutex_init (&RDS_Mutex, NULL);
 
 	tef665x_start();
-    return 0;
+	return 0;
 }
 
 static void tef665x_set_frequency_callback(radio_freq_callback_t callback,