Add config macros for device-variant, freq-support and xtal config

connectivity/drivers/lora/COMPONENT_SX126X/SX126X_LoRaRadio.cpp

@@ -431,7 +431,11 @@ void SX126X_LoRaRadio::cold_start_wakeup()
     write_opmode_command(RADIO_SET_REGULATORMODE, &regulator_mode, 1);
     set_buffer_base_addr(0x00, 0x00);
 
+#if MBED_CONF_SX126X_LORA_DRIVER_XTAL == -1
     if (_crystal_select.is_connected() && _crystal_select == 0) {
+#else
+    if (MBED_CONF_SX126X_LORA_DRIVER_XTAL == 0) {
+#endif
         caliberation_params_t calib_param;
         set_dio3_as_tcxo_ctrl(TCXO_CTRL_1_7V, 320); //5 ms
         calib_param.value = 0x7F;
@@ -690,6 +694,7 @@ void SX126X_LoRaRadio::read_fifo(uint8_t *buffer, uint8_t size, uint8_t offset)
     _chip_select = 1;
 }
 
+#if MBED_CONF_SX126X_LORA_DRIVER_DEVICE_VARIANT == -1
 uint8_t SX126X_LoRaRadio::get_device_variant(void)
 {
     uint16_t val = 0;
@@ -703,7 +708,14 @@ uint8_t SX126X_LoRaRadio::get_device_variant(void)
         return SX1261;
     }
 }
+#else
+uint8_t SX126X_LoRaRadio::get_device_variant(void)
+{
+    return MBED_CONF_SX126X_LORA_DRIVER_DEVICE_VARIANT;
+}
+#endif
 
+#if MBED_CONF_SX126X_LORA_DRIVER_FREQ_SUPPORT == -1
 uint8_t SX126X_LoRaRadio::get_frequency_support(void)
 {
     uint16_t val = 0;
@@ -725,6 +737,12 @@ uint8_t SX126X_LoRaRadio::get_frequency_support(void)
         return (MATCHING_FREQ_868);
     }
 }
+#else
+uint8_t SX126X_LoRaRadio::get_frequency_support(void)
+{
+    return MBED_CONF_SX126X_LORA_DRIVER_FREQ_SUPPORT;
+}
+#endif
 
 uint8_t SX126X_LoRaRadio::get_fsk_bw_reg_val(uint32_t bandwidth)
 {

connectivity/drivers/lora/COMPONENT_SX126X/SX126X_LoRaRadio.h

@@ -306,11 +306,19 @@ private:
     // module busy control
     mbed::DigitalIn _busy;
 
-    // module frequency selection
+// module frequency selection
+#if MBED_CONF_SX126X_LORA_DRIVER_FREQ_SUPPORT == -1
     mbed::AnalogIn _freq_select;
+#else
+    mbed::DigitalIn _freq_select; // AnalogIn errors if NC
+#endif
 
-    // module device variant selection
+// module device variant selection
+#if MBED_CONF_SX126X_LORA_DRIVER_DEVICE_VARIANT == -1
     mbed::AnalogIn _dev_select;
+#else
+    mbed::DigitalIn _dev_select;  // AnalogIn errors if NC
+#endif
 
     // module TCXO/XTAL control
     mbed::DigitalIn _crystal_select;

connectivity/drivers/lora/COMPONENT_SX126X/mbed_lib.json

@@ -25,6 +25,18 @@
         	"help": "Default: STDBY_RC = 0, STDBY_XOSC = 1",
         	"value": 0
         },
+        "device-variant": {
+            "help": "Default: -1 = use device-select, SX1261, SX1262, SX1268",
+            "value": -1
+        },
+        "freq-support": {
+            "help": "Default: -1 = use freq-select, MATCHING_FREQ_169, MATCHING_FREQ_280, MATCHING_FREQ_434, MATCHING_FREQ_490, MATCHING_FREQ_780, MATCHING_FREQ_868, MATCHING_FREQ_915",
+            "value": -1
+        },
+        "xtal": {
+            "help": "Default: -1 = use crystal-select, TXCO = 0, XTAL = 1",
+            "value": -1
+        },
         "spi-mosi": {
             "value": "NC"
         },