Merge pull request #14960 from benpicco/driver/at86rf215-rpc

drivers/at86rf215: implement Reduced Power Consumption

drivers/at86rf215/Kconfig

@@ -27,6 +27,11 @@ config AT86RF215_TRIM_VAL_EN
     help
         Enable crystal oscillator trimming.
 
+config AT86RF215_RPC_EN
+    bool "Enable Reduced Power Consumption"
+    help
+        Reduce Power Consumption in RX IDLE by duty-cycling the RF circuitry.
+
 config AT86RF215_TRIM_VAL
     int "Trim value for the crystal oscillator"
     range 0 15

drivers/at86rf215/at86rf215.c

@@ -81,7 +81,11 @@ void at86rf215_reset_and_cfg(at86rf215_t *dev)
     dev->csma_minbe       = AT86RF215_CSMA_MIN_BE_DEFAULT;
 
     dev->flags |= AT86RF215_OPT_AUTOACK
-               |  AT86RF215_OPT_CSMA;
+               |  AT86RF215_OPT_CSMA
+#if CONFIG_AT86RF215_RPC
+               |  AT86RF215_OPT_RPC
+#endif
+               ;
 
     /* apply the configuration */
     at86rf215_reset(dev);
@@ -337,6 +341,8 @@ bool at86rf215_cca(at86rf215_t *dev)
     at86rf215_reg_and(dev, dev->RF->RG_IRQM, ~(RF_IRQ_EDC | RF_IRQ_TRXRDY));
     at86rf215_reg_and(dev, dev->BBC->RG_PC, ~PC_BBEN_MASK);
 
+    at86rf215_disable_rpc(dev);
+
     /* start energy detect */
     at86rf215_reg_write(dev, dev->RF->RG_EDC, RF_EDSINGLE);
     while (!(at86rf215_reg_read(dev, dev->RF->RG_IRQS) & RF_IRQ_EDC)) {}
@@ -347,6 +353,7 @@ bool at86rf215_cca(at86rf215_t *dev)
     at86rf215_reg_or(dev, dev->RF->RG_IRQM, RF_IRQ_EDC | RF_IRQ_TRXRDY);
     at86rf215_reg_or(dev, dev->BBC->RG_PC, PC_BBEN_MASK);
 
+    at86rf215_enable_rpc(dev);
     at86rf215_set_idle_from_rx(dev, old_state);
 
     return clear;

drivers/at86rf215/at86rf215_getset.c

@@ -204,6 +204,38 @@ int8_t at86rf215_get_ed_level(at86rf215_t *dev)
     return at86rf215_reg_read(dev, dev->RF->RG_EDV);
 }
 
+void at86rf215_enable_rpc(at86rf215_t *dev)
+{
+    if (!(dev->flags & AT86RF215_OPT_RPC) || !CONFIG_AT86RF215_RPC_EN) {
+        return;
+    }
+
+    /* no Reduced Power mode available for OFDM */
+
+#ifdef MODULE_NETDEV_IEEE802154_MR_OQPSK
+    {
+        /* MR-O-QPSK */
+        at86rf215_reg_or(dev, dev->BBC->RG_OQPSKC2, OQPSKC2_RPC_MASK);
+    }
+#endif
+}
+
+void at86rf215_disable_rpc(at86rf215_t *dev)
+{
+    if (!(dev->flags & AT86RF215_OPT_RPC) || !CONFIG_AT86RF215_RPC_EN) {
+        return;
+    }
+
+    /* no Reduced Power mode available for OFDM */
+
+#ifdef MODULE_NETDEV_IEEE802154_MR_OQPSK
+    {
+        /* MR-O-QPSK */
+        at86rf215_reg_and(dev, dev->BBC->RG_OQPSKC2, ~OQPSKC2_RPC_MASK);
+    }
+#endif
+}
+
 void at86rf215_set_option(at86rf215_t *dev, uint16_t option, bool state)
 {
     /* set option field */
@@ -243,7 +275,14 @@ void at86rf215_set_option(at86rf215_t *dev, uint16_t option, bool state)
             }
 
             break;
+        case AT86RF215_OPT_RPC:
+            if (state) {
+                at86rf215_enable_rpc(dev);
+            } else {
+                at86rf215_disable_rpc(dev);
+            }
 
+            break;
         default:
             /* do nothing */
             break;

drivers/at86rf215/at86rf215_netdev.c

@@ -863,6 +863,7 @@ static void _handle_edc(at86rf215_t *dev)
         dev->state = AT86RF215_STATE_IDLE;
 
         at86rf215_enable_baseband(dev);
+        at86rf215_enable_rpc(dev);
         at86rf215_tx_done(dev);
 
         netdev->event_callback(netdev, NETDEV_EVENT_TX_MEDIUM_BUSY);
@@ -944,6 +945,7 @@ static void _isr(netdev_t *netdev)
         } else if (rf_irq_mask & RF_IRQ_TRXRDY) {
             /* disable baseband for energy detection */
             at86rf215_disable_baseband(dev);
+            at86rf215_disable_rpc(dev);
             /* switch to state RX for energy detection */
             at86rf215_rf_cmd(dev, CMD_RF_RX);
             /* start energy measurement */

drivers/include/at86rf215.h

@@ -114,6 +114,15 @@ enum {
 #endif
 /** @} */
 
+/**
+ * @name    Enable Reduced Power Consumption
+ * @{
+ */
+#ifndef CONFIG_AT86RF215_RPC_EN
+#define CONFIG_AT86RF215_RPC_EN                 (0)
+#endif
+/** @} */
+
 /**
  * @name    Default PHY Mode
  * @{