[nrf fromlist] soc: nordic: Add LRCCONF management

Due to the possibility of simultaneous accesess to LRCCONF registers,
additional management is required.

Upstream PR: zephyrproject-rtos/zephyr#79067

Signed-off-by: Adam Kondraciuk <adam.kondraciuk@nordicsemi.no>

drivers/clock_control/clock_control_nrf2_common.c

@@ -26,9 +26,6 @@ LOG_MODULE_REGISTER(clock_control_nrf2, CONFIG_CLOCK_CONTROL_LOG_LEVEL);
  */
 NRF2_STRUCT_CLOCK_CONFIG(generic, ONOFF_CNT_MAX);
 
-static sys_slist_t poweron_main_list;
-static struct k_spinlock poweron_main_lock;
-
 static void update_config(struct clock_config_generic *cfg)
 {
 	atomic_val_t prev_flags = atomic_or(&cfg->flags, FLAG_UPDATE_NEEDED);
@@ -165,34 +162,3 @@ int api_nosys_on_off(const struct device *dev, clock_control_subsys_t sys)
 
 	return -ENOSYS;
 }
-
-void nrf2_clock_request_lrcconf_poweron_main(struct nrf2_clock_lrcconf_sink *sink)
-{
-	K_SPINLOCK(&poweron_main_lock) {
-		if (sys_slist_len(&poweron_main_list) == 0) {
-			LOG_DBG("%s forced on", "main domain");
-			NRF_LRCCONF010->POWERON &= ~LRCCONF_POWERON_MAIN_Msk;
-			NRF_LRCCONF010->POWERON |= LRCCONF_POWERON_MAIN_AlwaysOn;
-		}
-
-		sys_slist_find_and_remove(&poweron_main_list, &sink->node);
-		sys_slist_append(&poweron_main_list, &sink->node);
-	}
-}
-
-void nrf2_clock_release_lrcconf_poweron_main(struct nrf2_clock_lrcconf_sink *sink)
-{
-	K_SPINLOCK(&poweron_main_lock) {
-		if (!sys_slist_find_and_remove(&poweron_main_list, &sink->node)) {
-			K_SPINLOCK_BREAK;
-		}
-
-		if (sys_slist_len(&poweron_main_list) > 0) {
-			K_SPINLOCK_BREAK;
-		}
-
-		LOG_DBG("%s automatic", "main domain");
-		NRF_LRCCONF010->POWERON &= ~LRCCONF_POWERON_MAIN_Msk;
-		NRF_LRCCONF010->POWERON |= LRCCONF_POWERON_MAIN_Automatic;
-	}
-}

drivers/clock_control/clock_control_nrf2_common.h

@@ -80,10 +80,4 @@ struct nrf2_clock_lrcconf_sink {
 	sys_snode_t node;
 };
 
-/**
- * @brief Request or release lrcconf main power domain
- */
-void nrf2_clock_request_lrcconf_poweron_main(struct nrf2_clock_lrcconf_sink *sink);
-void nrf2_clock_release_lrcconf_poweron_main(struct nrf2_clock_lrcconf_sink *sink);
-
 #endif /* ZEPHYR_DRIVERS_CLOCK_CONTROL_NRF2_COMMON_H_ */

drivers/clock_control/clock_control_nrf2_fll16m.c

@@ -8,7 +8,7 @@
 #include "clock_control_nrf2_common.h"
 #include <zephyr/devicetree.h>
 #include <zephyr/drivers/clock_control/nrf_clock_control.h>
-#include <hal/nrf_lrcconf.h>
+#include <soc/nordic/common/soc_lrcconf.h>
 
 #include <zephyr/logging/log.h>
 LOG_MODULE_DECLARE(clock_control_nrf2, CONFIG_CLOCK_CONTROL_LOG_LEVEL);
@@ -76,13 +76,13 @@ static void activate_fll16m_mode(struct fll16m_dev_data *dev_data, uint8_t mode)
 	/* TODO: change to nrf_lrcconf_* function when such is available. */
 
 	if (mode != FLL16M_MODE_DEFAULT) {
-		nrf2_clock_request_lrcconf_poweron_main(&dev_data->lrcconf_sink);
+		soc_lrcconf_poweron_request(&dev_data->lrcconf_sink.node, NRF_LRCCONF_POWER_MAIN);
 	}
 
 	NRF_LRCCONF010->CLKCTRL[0].SRC = mode;
 
 	if (mode == FLL16M_MODE_DEFAULT) {
-		nrf2_clock_release_lrcconf_poweron_main(&dev_data->lrcconf_sink);
+		soc_lrcconf_poweron_release(&dev_data->lrcconf_sink.node, NRF_LRCCONF_POWER_MAIN);
 	}
 
 	nrf_lrcconf_task_trigger(NRF_LRCCONF010, NRF_LRCCONF_TASK_CLKSTART_0);

drivers/clock_control/clock_control_nrf2_hfxo.c

@@ -11,7 +11,7 @@
 #include <zephyr/logging/log.h>
 LOG_MODULE_DECLARE(clock_control_nrf2, CONFIG_CLOCK_CONTROL_LOG_LEVEL);
 
-#include <hal/nrf_lrcconf.h>
+#include <soc/nordic/common/soc_lrcconf.h>
 
 BUILD_ASSERT(DT_NUM_INST_STATUS_OKAY(DT_DRV_COMPAT) == 1,
 	     "multiple instances not supported");
@@ -58,7 +58,7 @@ static void onoff_start_hfxo(struct onoff_manager *mgr, onoff_notify_fn notify)
 	dev_data->notify = notify;
 
 	nrf_lrcconf_event_clear(NRF_LRCCONF010, NRF_LRCCONF_EVENT_HFXOSTARTED);
-	nrf2_clock_request_lrcconf_poweron_main(&dev_data->lrcconf_sink);
+	soc_lrcconf_poweron_request(&dev_data->lrcconf_sink.node, NRF_LRCCONF_POWER_MAIN);
 	nrf_lrcconf_task_trigger(NRF_LRCCONF010, NRF_LRCCONF_TASK_REQHFXO);
 
 	/* Due to a hardware issue, the HFXOSTARTED event is currently
@@ -74,7 +74,7 @@ static void onoff_stop_hfxo(struct onoff_manager *mgr, onoff_notify_fn notify)
 		CONTAINER_OF(mgr, struct dev_data_hfxo, mgr);
 
 	nrf_lrcconf_task_trigger(NRF_LRCCONF010, NRF_LRCCONF_TASK_STOPREQHFXO);
-	nrf2_clock_release_lrcconf_poweron_main(&dev_data->lrcconf_sink);
+	soc_lrcconf_poweron_release(&dev_data->lrcconf_sink.node, NRF_LRCCONF_POWER_MAIN);
 	notify(mgr, 0);
 }
 

soc/nordic/common/soc_lrcconf.c

@@ -0,0 +1,63 @@
+/*
+ * Copyright (c) 2024 Nordic Semiconductor ASA
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#include <soc_lrcconf.h>
+#include <zephyr/kernel.h>
+
+static struct k_spinlock lock;
+sys_slist_t poweron_main_list;
+sys_slist_t poweron_active_list;
+
+void soc_lrcconf_poweron_request(sys_snode_t *node, nrf_lrcconf_power_domain_mask_t domain)
+{
+	__ASSERT(is_power_of_two(domain),
+		 "Only one bit can be set for the domain parameter");
+
+	sys_slist_t *poweron_list;
+
+	if (domain == NRF_LRCCONF_POWER_MAIN) {
+		poweron_list = &poweron_main_list;
+	} else if (domain == NRF_LRCCONF_POWER_DOMAIN_0) {
+		poweron_list = &poweron_active_list;
+	} else {
+		return;
+	}
+	K_SPINLOCK(&lock) {
+		if (sys_slist_len(poweron_list) == 0) {
+			nrf_lrcconf_poweron_force_set(NRF_LRCCONF010, domain, true);
+		}
+
+		sys_slist_find_and_remove(poweron_list, node);
+		sys_slist_append(poweron_list, node);
+	}
+}
+
+void soc_lrcconf_poweron_release(sys_snode_t *node, nrf_lrcconf_power_domain_mask_t domain)
+{
+	__ASSERT(is_power_of_two(domain),
+		 "Only one bit can be set for the domain parameter");
+
+	sys_slist_t *poweron_list;
+
+	if (domain == NRF_LRCCONF_POWER_MAIN) {
+		poweron_list = &poweron_main_list;
+	} else if (domain == NRF_LRCCONF_POWER_DOMAIN_0) {
+		poweron_list = &poweron_active_list;
+	} else {
+		return;
+	}
+
+	K_SPINLOCK(&lock) {
+		if (!sys_slist_find_and_remove(poweron_list, node)) {
+			K_SPINLOCK_BREAK;
+		}
+
+		if (sys_slist_len(poweron_list) > 0) {
+			K_SPINLOCK_BREAK;
+		}
+		nrf_lrcconf_poweron_force_set(NRF_LRCCONF010, domain, false);
+	}
+}

soc/nordic/common/soc_lrcconf.h

@@ -0,0 +1,34 @@
+/*
+ * Copyright (c) 2024 Nordic Semiconductor ASA
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+/**
+ * @file nRF SoC specific helpers for lrcconf management
+ */
+
+#ifndef ZEPHYR_SOC_NORDIC_COMMON_LRCCONF_H_
+#define ZEPHYR_SOC_NORDIC_COMMON_LRCCONF_H_
+
+#include <hal/nrf_lrcconf.h>
+
+/**
+ * @brief Request lrcconf power domain
+ *
+ * @param node	 Pointer to the @ref sys_snode_t structure which is the ID of the
+ *		 requesting module.
+ * @param domain The mask that represents the power domain ID.
+ */
+void soc_lrcconf_poweron_request(sys_snode_t *node, nrf_lrcconf_power_domain_mask_t domain);
+
+/**
+ * @brief Release lrcconf power domain
+ *
+ * @param node	 Pointer to the @ref sys_snode_t structure which is the ID of the
+ *		 requesting module.
+ * @param domain The mask that represents the power domain ID.
+ */
+void soc_lrcconf_poweron_release(sys_snode_t *node, nrf_lrcconf_power_domain_mask_t domain);
+
+#endif /* ZEPHYR_SOC_NORDIC_COMMON_LRCCONF_H_ */

soc/nordic/nrf54h/CMakeLists.txt

@@ -3,6 +3,7 @@
 
 if(CONFIG_ARM)
   zephyr_library_sources(soc.c)
+  zephyr_library_sources(../common/soc_lrcconf.c)
   if(CONFIG_PM OR CONFIG_POWEROFF)
     zephyr_library_sources(power.c)
   endif()

soc/nordic/nrf54h/Kconfig

@@ -28,6 +28,7 @@ config SOC_NRF54H20_CPUAPP
 	select NRFS_HAS_VBUS_DETECTOR_SERVICE
 	select HAS_PM
 	select HAS_POWEROFF
+	select ARM_ON_ENTER_CPU_IDLE_HOOK
 
 config SOC_NRF54H20_CPURAD
 	select ARM

soc/nordic/nrf54h/power.c

@@ -9,12 +9,16 @@
 #include <zephyr/pm/policy.h>
 #include <zephyr/arch/common/pm_s2ram.h>
 #include <hal/nrf_resetinfo.h>
-#include <hal/nrf_lrcconf.h>
 #include <hal/nrf_memconf.h>
 #include <zephyr/cache.h>
 #include <power.h>
+#include <soc_lrcconf.h>
 #include "pm_s2ram.h"
 
+#if !IS_ENABLED(CONFIG_SOC_NRF54H20_CPURAD)
+static sys_snode_t pm_node;
+#endif
+
 static void suspend_common(void)
 {
 
@@ -31,21 +35,20 @@ static void suspend_common(void)
 						RAMBLOCK_CONTROL_BIT_ICACHE, false);
 	}
 
+#if !IS_ENABLED(CONFIG_SOC_NRF54H20_CPURAD)
 	/* Disable retention */
 	nrf_lrcconf_retain_set(NRF_LRCCONF010, NRF_LRCCONF_POWER_DOMAIN_0, false);
-	nrf_lrcconf_poweron_force_set(NRF_LRCCONF010, NRF_LRCCONF_POWER_DOMAIN_0, false);
+#endif
 }
 
 void nrf_poweroff(void)
 {
 	nrf_resetinfo_resetreas_local_set(NRF_RESETINFO, 0);
 	nrf_resetinfo_restore_valid_set(NRF_RESETINFO, false);
 
+#if !IS_ENABLED(CONFIG_SOC_NRF54H20_CPURAD)
 	nrf_lrcconf_retain_set(NRF_LRCCONF010, NRF_LRCCONF_POWER_MAIN, false);
-
-	/* TODO: Move it around k_cpu_idle() implementation. */
-	nrf_lrcconf_poweron_force_set(NRF_LRCCONF010, NRF_LRCCONF_POWER_MAIN, false);
-	nrf_lrcconf_poweron_force_set(NRF_LRCCONF010, NRF_LRCCONF_POWER_DOMAIN_0, false);
+#endif
 
 	suspend_common();
 
@@ -77,12 +80,10 @@ static void sys_resume(void)
 		sys_cache_data_enable();
 	}
 
+#if !IS_ENABLED(CONFIG_SOC_NRF54H20_CPURAD)
 	/* Re-enable domain retention. */
 	nrf_lrcconf_retain_set(NRF_LRCCONF010, NRF_LRCCONF_POWER_DOMAIN_0, true);
-
-	/* TODO: Move it around k_cpu_idle() implementation. */
-	nrf_lrcconf_poweron_force_set(NRF_LRCCONF010, NRF_LRCCONF_POWER_MAIN,
-			!IS_ENABLED(CONFIG_SOC_NRF54H20_CPURAD));
+#endif
 }
 
 /* Function called during local domain suspend to RAM. */
@@ -94,8 +95,6 @@ static int sys_suspend_to_ram(void)
 	nrf_resetinfo_resetreas_local_set(NRF_RESETINFO,
 					  NRF_RESETINFO_RESETREAS_LOCAL_UNRETAINED_MASK);
 	nrf_resetinfo_restore_valid_set(NRF_RESETINFO, true);
-	nrf_lrcconf_poweron_force_set(NRF_LRCCONF010, NRF_LRCCONF_POWER_DOMAIN_0, false);
-	nrf_lrcconf_poweron_force_set(NRF_LRCCONF010, NRF_LRCCONF_POWER_MAIN, false);
 
 	suspend_common();
 
@@ -141,5 +140,22 @@ void pm_state_set(enum pm_state state, uint8_t substate_id)
 
 void pm_state_exit_post_ops(enum pm_state state, uint8_t substate_id)
 {
+#if !IS_ENABLED(CONFIG_SOC_NRF54H20_CPURAD)
+	if (state == PM_STATE_SUSPEND_TO_IDLE) {
+		soc_lrcconf_poweron_release(&pm_node, NRF_LRCCONF_POWER_DOMAIN_0);
+	}
+#endif
 	irq_unlock(0);
 }
+
+#if !IS_ENABLED(CONFIG_SOC_NRF54H20_CPURAD)
+void pm_state_enter_idle_prepare(void)
+{
+	soc_lrcconf_poweron_request(&pm_node, NRF_LRCCONF_POWER_DOMAIN_0);
+}
+
+sys_snode_t *pm_sys_node_id_get(void)
+{
+	return &pm_node;
+}
+#endif

soc/nordic/nrf54h/power.h

@@ -10,11 +10,29 @@
 #ifndef _ZEPHYR_SOC_ARM_NORDIC_NRF_POWER_H_
 #define _ZEPHYR_SOC_ARM_NORDIC_NRF_POWER_H_
 
+#include <zephyr/sys/slist.h>
+
 /**
  * @brief Perform a power off.
  *
  * This function performs a power off of the core.
  */
 void nrf_poweroff(void);
 
+/**
+ * @brief Pepare to the idle state.
+ *
+ * This function applies required PM configuration must be performed before the idle state.
+ */
+void pm_state_enter_idle_prepare(void);
+
+/**
+ * @brief Get the ID of the node used by PM module.
+ *
+ * This function returns the node ID to be shared with other dependent modules.
+ *
+ * @return The pointer to the node assigned to PM module.
+ */
+sys_snode_t *pm_sys_node_id_get(void);
+
 #endif /* _ZEPHYR_SOC_ARM_NORDIC_NRF_POWER_H_ */