[nrf fromlist] modules: hal_nordic: implement hfclk start/stop for cases when clock_control is not available.

Upstream PR: zephyrproject-rtos/zephyr#73156

Clock_control is currently not supported on nRF54H20.
This commit adds new way of handling the hfclk targeted for nRF54H20.

This solution shall be replaced once the clock_control is supported for nRF54H20.

Signed-off-by: Piotr Koziar <piotr.koziar@nordicsemi.no>

Author: piotrkoziar

modules/hal_nordic/nrf_802154/sl_opensource/platform/nrf_802154_clock_zephyr.c

@@ -4,18 +4,21 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
+#include <nrf_802154_config.h>
 #include <platform/nrf_802154_clock.h>
 
 #include <stddef.h>
 
 #include <compiler_abstraction.h>
+#include <zephyr/kernel.h>
+#if defined(CONFIG_CLOCK_CONTROL_NRF)
 #include <zephyr/drivers/clock_control/nrf_clock_control.h>
 #include <zephyr/drivers/clock_control.h>
+#elif !defined(NRF54H_SERIES)
+#error No implementation to start or stop HFCLK due to missing clock_control.
+#endif
 
 static bool hfclk_is_running;
-static bool lfclk_is_running;
-static struct onoff_client hfclk_cli;
-static struct onoff_client lfclk_cli;
 
 void nrf_802154_clock_init(void)
 {
@@ -27,6 +30,15 @@ void nrf_802154_clock_deinit(void)
 	/* Intentionally empty. */
 }
 
+bool nrf_802154_clock_hfclk_is_running(void)
+{
+	return hfclk_is_running;
+}
+
+#if defined(CONFIG_CLOCK_CONTROL_NRF)
+
+static struct onoff_client hfclk_cli;
+
 static void hfclk_on_callback(struct onoff_manager *mgr,
 			      struct onoff_client  *cli,
 			      uint32_t state,
@@ -63,53 +75,39 @@ void nrf_802154_clock_hfclk_stop(void)
 	hfclk_is_running = false;
 }
 
-bool nrf_802154_clock_hfclk_is_running(void)
-{
-	return hfclk_is_running;
-}
+#elif defined(NRF54H_SERIES)
 
-static void lfclk_on_callback(struct onoff_manager *mgr,
-			      struct onoff_client  *cli,
-			      uint32_t state,
-			      int res)
-{
-	lfclk_is_running = true;
-	nrf_802154_clock_lfclk_ready();
-}
+#define NRF_LRCCONF_RADIO_PD NRF_LRCCONF010
+#define MAX_HFXO_RAMP_UP_TIME_US 1000
 
-void nrf_802154_clock_lfclk_start(void)
+static void hfclk_started_timer_handler(struct k_timer *dummy)
 {
-	int ret;
-	struct onoff_manager *mgr =
-		z_nrf_clock_control_get_onoff(CLOCK_CONTROL_NRF_SUBSYS_LF);
-
-	__ASSERT_NO_MSG(mgr != NULL);
-
-	sys_notify_init_callback(&lfclk_cli.notify, lfclk_on_callback);
-
-	ret = onoff_request(mgr, &lfclk_cli);
-	__ASSERT_NO_MSG(ret >= 0);
+	hfclk_is_running = true;
+	nrf_802154_clock_hfclk_ready();
 }
 
-void nrf_802154_clock_lfclk_stop(void)
-{
-	int ret;
-	struct onoff_manager *mgr =
-		z_nrf_clock_control_get_onoff(CLOCK_CONTROL_NRF_SUBSYS_LF);
+K_TIMER_DEFINE(hfclk_started_timer, hfclk_started_timer_handler, NULL);
 
-	__ASSERT_NO_MSG(mgr != NULL);
+void nrf_802154_clock_hfclk_start(void)
+{
+	/* Use register directly, there is no support for that task in nrf_lrcconf_task_trigger.
+	 * This code might cause troubles if there are other HFXO users in this CPU.
+	 */
+	NRF_LRCCONF_RADIO_PD->EVENTS_HFXOSTARTED = 0x0;
+	NRF_LRCCONF_RADIO_PD->TASKS_REQHFXO = 0x1;
 
-	ret = onoff_cancel_or_release(mgr, &lfclk_cli);
-	__ASSERT_NO_MSG(ret >= 0);
-	lfclk_is_running = false;
+	k_timer_start(&hfclk_started_timer, K_USEC(MAX_HFXO_RAMP_UP_TIME_US), K_NO_WAIT);
 }
 
-bool nrf_802154_clock_lfclk_is_running(void)
+void nrf_802154_clock_hfclk_stop(void)
 {
-	return lfclk_is_running;
-}
+	/* Use register directly, there is no support for that task in nrf_lrcconf_task_trigger.
+	 * This code might cause troubles if there are other HFXO users in this CPU.
+	 */
+	NRF_LRCCONF_RADIO_PD->TASKS_STOPREQHFXO = 0x1;
+	NRF_LRCCONF_RADIO_PD->EVENTS_HFXOSTARTED = 0x0;
 
-__WEAK void nrf_802154_clock_lfclk_ready(void)
-{
-	/* Intentionally empty. */
+	hfclk_is_running = false;
 }
+
+#endif