[riot-notifications] [RIOT-OS/RIOT] cpu/nrf5x: enhance external HF clock source handling to allow for substantial energy savings (#15804)

benpicco notifications at github.com
Wed Jan 20 17:54:33 CET 2021


@benpicco commented on this pull request.



> @@ -401,6 +402,11 @@ static int nrfmin_init(netdev_t *dev)
         my_addr ^= cpuid[i] << (8 * (i & 0x01));
     }
 
+    /* the radio need the external HF clock source to be enabled */
+    /* @todo    add proper handling to release the clock whenever the radio is
+     *          idle */
+    clock_hfxo_request();

You can turn it off in `goto_target_state()` when `target_state == STATE_OFF`

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