Nimble: Add support for LE Power Control

nimble/host/include/host/ble_gap.h

@@ -1024,8 +1024,9 @@ struct ble_gap_event {
 	    uint8_t delta;
 	} transmit_power;
 #endif
+
 #if MYNEWT_VAL(BLE_CONN_SUBRATING)
-	/**
+        /**
          * Represents a subrate change event that indicates connection subrate update procedure
          * has completed and some parameters have changed  Valid for
          * the following event types:
@@ -2264,7 +2265,6 @@ ble_gap_subrate_req(uint16_t conn_handle, uint16_t subrate_min, uint16_t subrate
                         uint16_t max_latency, uint16_t cont_num,
                         uint16_t supervision_timeout);
 #endif
-
 /**
  * Event listener structure
  *

nimble/host/src/ble_gap_priv.h

@@ -95,7 +95,6 @@ void ble_gap_rx_rd_rem_sup_feat_complete(const struct ble_hci_ev_le_subev_rd_rem
 #if MYNEWT_VAL(BLE_CONN_SUBRATING)
 void ble_gap_rx_subrate_change(const struct ble_hci_ev_le_subev_subrate_change *ev);
 #endif
-
 #if MYNEWT_VAL(BLE_POWER_CONTROL)
 void ble_gap_rx_transmit_power_report(const struct ble_hci_ev_le_subev_transmit_power_report *ev);
 void ble_gap_rx_le_pathloss_threshold(const struct ble_hci_ev_le_subev_path_loss_threshold *ev);

nimble/host/src/ble_hs_hci_evt.c

@@ -86,8 +86,7 @@ static ble_hs_hci_evt_le_fn ble_hs_hci_evt_le_subrate_change;
 #endif
 
 /* Statistics */
-struct host_hci_stats
-{
+struct host_hci_stats {
     uint32_t events_rxd;
     uint32_t good_acks_rxd;
     uint32_t bad_acks_rxd;

nimble/host/src/ble_hs_startup.c

@@ -247,6 +247,16 @@ ble_hs_startup_le_set_evmask_tx(void)
          * 0x0000000400000000 LE Subrate change event
          */
         mask |= 0x0000000400000000;
+#endif
+
+#if MYNEWT_VAL(BLE_POWER_CONTROL)
+    if (version >= BLE_HCI_VER_BCS_5_2) {
+        /**
+         * Enable the following LE events:
+         * 0x0000000080000000 LE Path Loss Threshold event
+         * 0x0000000100000000 LE Transmit Power Reporting event
+         */
+        mask |= 0x0000000180000000;
     }
 #endif