drivers: clock_control: nordic: Enable calibration from LFRC peripheral

For some nordic devices the LFRC peripheral is used to calibrate
the LFCLK clock instead of NRFX_CLOCK peripheral. This commit
adds support for the changes already made in nrfx drivers.

Signed-off-by: Robert Robinson <[email protected]>

Author: rob-robinson-14

drivers/clock_control/clock_control_nrf.c

@@ -751,7 +751,7 @@ static void clock_event_handler(nrfx_clock_evt_type_t event)
 		}
 		clkstarted_handle(dev, CLOCK_CONTROL_NRF_TYPE_LFCLK);
 		break;
-#if NRF_CLOCK_HAS_CALIBRATION
+#if NRF_CLOCK_HAS_CALIBRATION || NRF_LFRC_HAS_CALIBRATION
 	case NRFX_CLOCK_EVT_CAL_DONE:
 		if (IS_ENABLED(CONFIG_CLOCK_CONTROL_NRF_DRIVER_CALIBRATION)) {
 			z_nrf_clock_calibration_done_handler();
@@ -801,6 +801,10 @@ static int clk_init(const struct device *dev)
 		.stop = onoff_stop
 	};
 
+#if NRF_LFRC_HAS_CALIBRATION
+	IRQ_CONNECT(LFRC_IRQn, DT_INST_IRQ(0, priority), nrfx_isr, nrfx_power_clock_irq_handler, 0);
+#endif
+
 	IRQ_CONNECT(DT_INST_IRQN(0), DT_INST_IRQ(0, priority),
 		    nrfx_isr, nrfx_power_clock_irq_handler, 0);
 

modules/hal_nordic/nrfx/Kconfig

@@ -19,6 +19,9 @@ config NRFX_CLOCK
 
 if NRFX_CLOCK
 
+config NRFX_CLOCK_USE_LFRC_CALIBRATION
+	bool "Extend NRFX_CLOCK to use LFRC peripheral"
+
 config NRFX_CLOCK_LFXO_TWO_STAGE_ENABLED
 	bool "Two stage start sequence of the low frequency clock"
 

modules/hal_nordic/nrfx/nrfx_kconfig.h

@@ -27,6 +27,9 @@
 #ifdef CONFIG_NRFX_CLOCK_LOG
 #define NRFX_CLOCK_CONFIG_LOG_ENABLED 1
 #endif
+#ifdef CONFIG_NRFX_CLOCK_USE_LFRC_CALIBRATION
+#define NRFX_CLOCK_CONFIG_USE_LFRC_CALIBRATION 1
+#endif
 
 #ifdef CONFIG_NRFX_CLOCK_LF_SRC_RC
 #if defined(CONFIG_SOC_SERIES_NRF91X) || defined(CONFIG_SOC_COMPATIBLE_NRF53X)