samples: radio_test: Add workaround for MLTPAN-39

Added workaround for MLTPAN-39 on nRF54LM20A SoC.

Ref: NCSDK-34621

Signed-off-by: Marcin Jelinski <[email protected]>

Author: maje-emb

samples/peripheral/radio_test/src/main.c

@@ -17,6 +17,9 @@
 #if NRF54L_ERRATA_20_PRESENT
 #include <hal/nrf_power.h>
 #endif /* NRF54L_ERRATA_20_PRESENT */
+#if defined(NRF54LM20A_ENGA_XXAA)
+#include <hal/nrf_clock.h>
+#endif /* defined(NRF54LM20A_ENGA_XXAA) */
 
 /* Empty trim value */
 #define TRIM_VALUE_EMPTY 0xFFFFFFFF
@@ -57,6 +60,11 @@ static void clock_init(void)
 	}
 #endif /* NRF54L_ERRATA_20_PRESENT */
 
+#if defined(NRF54LM20A_ENGA_XXAA)
+	/* MLTPAN-39 */
+	nrf_clock_task_trigger(NRF_CLOCK, NRF_CLOCK_TASK_PLLSTART);
+#endif /* defined(NRF54LM20A_ENGA_XXAA) */
+
 	printk("Clock has started\n");
 }