Gridpoint patches on top of zephyr 4.3.0 [DO NOT MERGE]

drivers/lora/loramac_node/sx126x.c

@@ -50,8 +50,15 @@
 #if HAVE_GPIO_RX_ENABLE
 	.rx_enable = GPIO_DT_SPEC_INST_GET(0, rx_enable_gpios),
 #endif
+#if HAVE_GPIO_FE_CTRL
+	.fe_ctrl1_enable = GPIO_DT_SPEC_INST_GET(0, fe_ctrl1_enable_gpios),
+	.fe_ctrl2_enable = GPIO_DT_SPEC_INST_GET(0, fe_ctrl2_enable_gpios),
+	.fe_ctrl3_enable = GPIO_DT_SPEC_INST_GET(0, fe_ctrl3_enable_gpios),
+#endif
+
 };
 
+
 static struct sx126x_data dev_data;
 
 void SX126xWaitOnBusy(void);
@@ -253,29 +260,57 @@
 #endif
 }
 
+#if HAVE_GPIO_TX_ENABLE
 static void sx126x_set_tx_enable(int value)
 {
-#if HAVE_GPIO_TX_ENABLE
 	gpio_pin_set_dt(&dev_config.tx_enable, value);
-#endif
 }
+#endif
 
+#if HAVE_GPIO_RX_ENABLE
 static void sx126x_set_rx_enable(int value)
 {
-#if HAVE_GPIO_RX_ENABLE
 	gpio_pin_set_dt(&dev_config.rx_enable, value);
+}
+#endif
+
+
+static void sx126x_set_fe_ctrl(int ctrl1, int ctrl2, int ctrl3)
+{
+#if HAVE_GPIO_FE_CTRL
+	gpio_pin_set_dt(&dev_config.fe_ctrl1_enable, ctrl1);
+	gpio_pin_set_dt(&dev_config.fe_ctrl2_enable, ctrl2);
+	gpio_pin_set_dt(&dev_config.fe_ctrl3_enable, ctrl3);
 #endif
 }
 
+
 RadioOperatingModes_t SX126xGetOperatingMode(void)
 {
 	return dev_data.mode;
 }
 
+#if HAVE_GPIO_FE_CTRL
+static const enum {
+	RFO_LP,
+	RFO_HP,
+} pa_output = DT_INST_STRING_UPPER_TOKEN(0, power_amplifier_output);
+#endif
+
+#define LORA_NODE DT_NODELABEL(lora)
+
+
 void SX126xSetOperatingMode(RadioOperatingModes_t mode)
 {
 	LOG_DBG("SetOperatingMode: %s (%i)", sx126x_mode_name(mode), mode);
 
+#if HAVE_GPIO_FE_CTRL
+	const int off_fe_ctrl_lines[]  = DT_PROP(LORA_NODE, off_fe_ctrl_lines);
+	const int rx_fe_ctrl_lines[]   = DT_PROP(LORA_NODE, rx_fe_ctrl_lines);
+	const int txhp_fe_ctrl_lines[] = DT_PROP(LORA_NODE, txhp_fe_ctrl_lines);
+	const int txlp_fe_ctrl_lines[] = DT_PROP(LORA_NODE, txlp_fe_ctrl_lines);
+#endif
+
 	dev_data.mode = mode;
 
 	/* To avoid inadvertently putting the RF switch in an
@@ -284,24 +319,43 @@
 	 */
 	switch (mode) {
 	case MODE_TX:
+#if HAVE_GPIO_TX_ENABLE
 		sx126x_set_rx_enable(0);
 		sx126x_set_tx_enable(1);
+#endif
+#if HAVE_GPIO_FE_CTRL
+		if (pa_output == RFO_LP) {
+			sx126x_set_fe_ctrl(txlp_fe_ctrl_lines[0], txlp_fe_ctrl_lines[1], txlp_fe_ctrl_lines[2]);
+		} else {
+			sx126x_set_fe_ctrl(txhp_fe_ctrl_lines[0], txhp_fe_ctrl_lines[1], txhp_fe_ctrl_lines[2]);
+		}
+#endif
 		break;
 
 	case MODE_RX:
 	case MODE_RX_DC:
 	case MODE_CAD:
+#if HAVE_GPIO_TX_ENABLE
 		sx126x_set_tx_enable(0);
 		sx126x_set_rx_enable(1);
+#endif
+#if HAVE_GPIO_FE_CTRL
+		sx126x_set_fe_ctrl(rx_fe_ctrl_lines[0], rx_fe_ctrl_lines[1], rx_fe_ctrl_lines[2]);
+#endif
 		break;
 
 	case MODE_SLEEP:
 		/* Additionally disable the DIO1 interrupt to save power */
 		sx126x_dio1_irq_disable(&dev_data);
 		__fallthrough;
 	default:
+#if HAVE_GPIO_TX_ENABLE
 		sx126x_set_rx_enable(0);
 		sx126x_set_tx_enable(0);
+#endif
+#if HAVE_GPIO_FE_CTRL
+		sx126x_set_fe_ctrl(off_fe_ctrl_lines[0], off_fe_ctrl_lines[1], off_fe_ctrl_lines[2]);
+#endif
 		break;
 	}
 }
@@ -435,9 +489,16 @@
 
 	LOG_DBG("Initializing sx126x");
 
 	if (sx12xx_configure_pin(antenna_enable, GPIO_OUTPUT_INACTIVE) ||
 	    sx12xx_configure_pin(rx_enable, GPIO_OUTPUT_INACTIVE) ||
-	    sx12xx_configure_pin(tx_enable, GPIO_OUTPUT_INACTIVE)) {
+	    sx12xx_configure_pin(tx_enable, GPIO_OUTPUT_INACTIVE)
+#if HAVE_GPIO_FE_CTRL
+		|| sx12xx_configure_pin(fe_ctrl1_enable, GPIO_OUTPUT_INACTIVE)
+		|| sx12xx_configure_pin(fe_ctrl2_enable, GPIO_OUTPUT_INACTIVE)
+		|| sx12xx_configure_pin(fe_ctrl3_enable, GPIO_OUTPUT_INACTIVE)
+#endif
+	)
+	{
 		return -EIO;
 	}
 

drivers/lora/loramac_node/sx126x_common.h

@@ -34,6 +34,7 @@
 	DT_INST_NODE_HAS_PROP(0, antenna_enable_gpios)
 #define HAVE_GPIO_TX_ENABLE	DT_INST_NODE_HAS_PROP(0, tx_enable_gpios)
 #define HAVE_GPIO_RX_ENABLE	DT_INST_NODE_HAS_PROP(0, rx_enable_gpios)
+#define HAVE_GPIO_FE_CTRL  (DT_INST_NODE_HAS_PROP(0, fe_ctrl1_enable_gpios) && !DT_INST_NODE_HAS_PROP(0, tx_enable_gpios))
 
 struct sx126x_config {
 	struct spi_dt_spec bus;
@@ -46,6 +47,12 @@
 #if HAVE_GPIO_RX_ENABLE
 	struct gpio_dt_spec rx_enable;
 #endif
+#if HAVE_GPIO_FE_CTRL
+	struct gpio_dt_spec fe_ctrl3_enable;
+	struct gpio_dt_spec fe_ctrl2_enable;
+	struct gpio_dt_spec fe_ctrl1_enable;
+#endif
+
 };
 
 struct sx126x_data {

drivers/lora/loramac_node/sx127x.c

@@ -7,6 +7,7 @@
 
 #include <zephyr/drivers/gpio.h>
 #include <zephyr/drivers/lora.h>
+#include <zephyr/drivers/lora_rssi.h>
 #include <zephyr/drivers/spi.h>
 #include <zephyr/kernel.h>
 
@@ -88,6 +89,7 @@ LOG_MODULE_REGISTER(sx127x, CONFIG_LORA_LOG_LEVEL);
 #define SX127xSetPublicNetwork SX1276SetPublicNetwork
 #define SX127xGetWakeupTime SX1276GetWakeupTime
 #define SX127xSetTxContinuousWave SX1276SetTxContinuousWave
+#define SX127xReadRssi SX1276ReadRssi
 
 #else
 #error No SX127x instance in device tree.
@@ -548,6 +550,7 @@ const struct Radio_s Radio = {
 	.RxBoosted = NULL,
 	.SetRxDutyCycle = NULL,
 	.SetTxContinuousWave = SX127xSetTxContinuousWave,
+	.Rssi = SX127xReadRssi,
 };
 
 static int sx127x_antenna_configure(void)

drivers/lora/loramac_node/sx12xx_common.c

@@ -7,6 +7,7 @@
 
 #include <zephyr/drivers/gpio.h>
 #include <zephyr/drivers/lora.h>
+#include <zephyr/drivers/lora_rssi.h>
 #include <zephyr/logging/log.h>
 #include <zephyr/sys/atomic.h>
 #include <zephyr/kernel.h>
@@ -379,6 +380,76 @@
 	return 0;
 }
 
+/**
+ * @brief Get RF noise floor measurement
+ *
+ * @param dev Device pointer
+ * @return int16_t Noise floor value in dBm
+ */
+int16_t sx12xx_lora_get_noise_floor(const struct device *dev)
+{
+	int16_t noise_floor = NOISE_FLOOR_DEFAULT_VALUE;
+	int32_t noise_floor_sum = 0;
+	int valid_measurements = 0;
+
+	/* Ensure available, released after measurement */
+	if (!modem_acquire(&dev_data)) {
+		LOG_ERR("Radio is busy");
+		return NOISE_FLOOR_DEFAULT_VALUE;
+	}
+
+	LOG_DBG("Starting noise floor measurement using Radio.Rssi()");
+
+	/* Configure radio for optimal noise floor measurement */
+	Radio.SetModem(MODEM_FSK);
+
+	/* Set radio to continuous reception */
+	Radio.Rx(0);
+
+	/* Take multiple measurements to get a stable reading */
+	for (int i = 0; i < 5; i++) {
+		/* Give radio time to settle before each measurement */
+		k_sleep(K_MSEC(20));
+
+		/* Get noise floor directly from the radio API */
+		int16_t current_noise_floor = Radio.Rssi(MODEM_FSK);
+		LOG_DBG("Noise floor measurement %d: %d dBm", i, current_noise_floor);
+
+		/* Filter out clearly invalid measurements */
+		if (current_noise_floor < 0) {  /* Only accept negative values as valid */
+			noise_floor_sum += current_noise_floor;
+			valid_measurements++;
+		} else {
+			LOG_WRN("Ignoring invalid noise floor: %d dBm", current_noise_floor);
+		}
+	}
+
+	/* Calculate average */
+	if (valid_measurements > 0) {
+		noise_floor = noise_floor_sum / valid_measurements;
+		LOG_DBG("Average noise floor: %d dBm from %d readings", noise_floor, valid_measurements);
+	} else {
+		LOG_WRN("No valid noise floor measurements obtained");
+	}
+
+	/* Restore original radio state - no need to sleep before this */
+	Radio.Sleep();
+
+	/* Release modem when done */
+	modem_release(&dev_data);
+
+	return noise_floor;
+}
+
+int16_t lora_get_noise_floor(const struct device *dev)
+{
+	if (!dev) {
+		return NOISE_FLOOR_DEFAULT_VALUE;
+	}
+
+	return sx12xx_lora_get_noise_floor(dev);
+}
+
 int sx12xx_init(const struct device *dev)
 {
 	atomic_set(&dev_data.modem_usage, 0);

drivers/lora/loramac_node/sx12xx_common.h

@@ -38,6 +38,8 @@ int sx12xx_lora_test_cw(const struct device *dev, uint32_t frequency,
 			int8_t tx_power,
 			uint16_t duration);
 
+int16_t sx12xx_lora_get_noise_floor(const struct device *dev);
+
 int sx12xx_init(const struct device *dev);
 
 #endif /* ZEPHYR_DRIVERS_SX12XX_COMMON_H_ */