drivers/gps: add new GPS_SAT_INFO parameter to enable satelitte_info

- this replaces the command line argument -s

src/drivers/gps/gps.cpp

@@ -117,7 +117,7 @@ public:
 		Count
 	};
 
-	GPS(const char *path, gps_driver_mode_t mode, GPSHelper::Interface interface, bool enable_sat_info, Instance instance,
+	GPS(const char *path, gps_driver_mode_t mode, GPSHelper::Interface interface, Instance instance,
 	    unsigned configured_baudrate);
 	~GPS() override;
 
@@ -279,8 +279,8 @@ px4::atomic<GPS *> GPS::_secondary_instance{nullptr};
 extern "C" __EXPORT int gps_main(int argc, char *argv[]);
 
 
-GPS::GPS(const char *path, gps_driver_mode_t mode, GPSHelper::Interface interface, bool enable_sat_info,
-	 Instance instance, unsigned configured_baudrate) :
+GPS::GPS(const char *path, gps_driver_mode_t mode, GPSHelper::Interface interface, Instance instance,
+	 unsigned configured_baudrate) :
 	Device(MODULE_NAME),
 	_configured_baudrate(configured_baudrate),
 	_mode(mode),
@@ -295,6 +295,9 @@ GPS::GPS(const char *path, gps_driver_mode_t mode, GPSHelper::Interface interfac
 	_report_gps_pos.heading = NAN;
 	_report_gps_pos.heading_offset = NAN;
 
+	int32_t enable_sat_info = 0;
+	param_get(param_find("GPS_SAT_INFO"), &enable_sat_info);
+
 	/* create satellite info data object if requested */
 	if (enable_sat_info) {
 		_sat_info = new GPS_Sat_Info();
@@ -1254,8 +1257,6 @@ $ gps reset warm
 	PRINT_MODULE_USAGE_PARAM_STRING('e', nullptr, "<file:dev>", "Optional secondary GPS device", true);
 	PRINT_MODULE_USAGE_PARAM_INT('g', 0, 0, 3000000, "Baudrate (secondary GPS, can also be p:<param_name>)", true);
 
-	PRINT_MODULE_USAGE_PARAM_FLAG('s', "Enable publication of satellite info", true);
-
 	PRINT_MODULE_USAGE_PARAM_STRING('i', "uart", "spi|uart", "GPS interface", true);
 	PRINT_MODULE_USAGE_PARAM_STRING('j', "uart", "spi|uart", "secondary GPS interface", true);
 	PRINT_MODULE_USAGE_PARAM_STRING('p', nullptr, "ubx|mtk|ash|eml|fem|nmea", "GPS Protocol (default=auto select)", true);
@@ -1324,7 +1325,6 @@ GPS *GPS::instantiate(int argc, char *argv[], Instance instance)
 	const char *device_name_secondary = nullptr;
 	int baudrate_main = 0;
 	int baudrate_secondary = 0;
-	bool enable_sat_info = false;
 	GPSHelper::Interface interface = GPSHelper::Interface::UART;
 	GPSHelper::Interface interface_secondary = GPSHelper::Interface::UART;
 	gps_driver_mode_t mode = gps_driver_mode_t::None;
@@ -1334,7 +1334,7 @@ GPS *GPS::instantiate(int argc, char *argv[], Instance instance)
 	int ch;
 	const char *myoptarg = nullptr;
 
-	while ((ch = px4_getopt(argc, argv, "b:d:e:g:si:j:p:", &myoptind, &myoptarg)) != EOF) {
+	while ((ch = px4_getopt(argc, argv, "b:d:e:g:i:j:p:", &myoptind, &myoptarg)) != EOF) {
 		switch (ch) {
 		case 'b':
 			if (px4_get_parameter_value(myoptarg, baudrate_main) != 0) {
@@ -1357,10 +1357,6 @@ GPS *GPS::instantiate(int argc, char *argv[], Instance instance)
 			device_name_secondary = myoptarg;
 			break;
 
-		case 's':
-			enable_sat_info = true;
-			break;
-
 		case 'i':
 			if (!strcmp(myoptarg, "spi")) {
 				interface = GPSHelper::Interface::SPI;
@@ -1430,7 +1426,7 @@ GPS *GPS::instantiate(int argc, char *argv[], Instance instance)
 	GPS *gps = nullptr;
 	if (instance == Instance::Main) {
 		if (device_name && (access(device_name, R_OK|W_OK) == 0)) {
-			gps = new GPS(device_name, mode, interface, enable_sat_info, instance, baudrate_main);
+			gps = new GPS(device_name, mode, interface, instance, baudrate_main);
 
 		} else {
 			PX4_ERR("invalid device (-d) %s", device_name ? device_name  : "");
@@ -1453,7 +1449,7 @@ GPS *GPS::instantiate(int argc, char *argv[], Instance instance)
 		}
 	} else { // secondary instance
 		if (device_name_secondary && (access(device_name_secondary, R_OK|W_OK) == 0)) {
-			gps = new GPS(device_name_secondary, mode, interface_secondary, enable_sat_info, instance, baudrate_secondary);
+			gps = new GPS(device_name_secondary, mode, interface_secondary, instance, baudrate_secondary);
 
 		} else {
 			PX4_ERR("invalid secondary device (-g) %s", device_name_secondary ? device_name_secondary : "");

src/drivers/gps/params.c

@@ -69,6 +69,18 @@ PARAM_DEFINE_INT32(GPS_DUMP_COMM, 0);
  */
 PARAM_DEFINE_INT32(GPS_UBX_DYNMODEL, 7);
 
+/**
+ * Enable sat info (if available)
+ *
+ * Enable publication of satellite info (ORB_ID(satellite_info)) if possible.
+ * Not available on MTK.
+ *
+ * @boolean
+ * @reboot_required true
+ * @group GPS
+ */
+PARAM_DEFINE_INT32(GPS_SAT_INFO, 0);
+
 /**
  * u-blox GPS Mode
  *