Merge tag 'pmdomain-v6.17' of git://git.kernel.org/pub/scm/linux/kernel/git/ulfh/linux-pm

Pull pmdomain updates from Ulf Hansson:
"pmdomain core:
- Leave powered-on genpds on until ->sync_state() or late_initcall_sync
- Export a common ->sync_state() helper for genpd providers
- Add generic ->sync_state() support
- Add a bus/driver for genpd provider-devices
- Introduce dev_pm_genpd_is_on() for consumers

pmdomain providers:
- cpuidle-psci: Drop redundant ->sync_state() support
- cpuidle-riscv-sbi: Drop redundant ->sync_state() support
- imx: Set ISI panic write for imx8m-blk-ctrl
- qcom: Add support for Glymur and Milos RPMh power-domains
- qcom: Use of_genpd_sync_state() for power-domains
- rockchip: Add support for the RK3528 variant
- samsung: Fix splash-screen handover by enforcing a ->sync_state()
- sunxi: Add support for Allwinner A523's PCK600 power-controller
- tegra: Opt-out from genpd's common ->sync_state() support for pmc
- thead: Instantiate a GPU power sequencer via the auxiliary bus
- renesas: Move init to postcore_initcalls
- xilinx: Move ->sync_state() support to firmware driver
- xilinx: Use of_genpd_sync_state() for power-domains

pmdomain consumers:
- remoteproc: imx_rproc: Fixup the detect/attach procedure for
pre-booted cores"

* tag 'pmdomain-v6.17' of git://git.kernel.org/pub/scm/linux/kernel/git/ulfh/linux-pm: (44 commits)
pmdomain: qcom: rpmhpd: Add Glymur RPMh Power Domains
dt-bindings: power: rpmpd: Add Glymur power domains
remoteproc: imx_rproc: detect and attach to pre-booted remote cores
remoteproc: imx_rproc: skip clock enable when M-core is managed by the SCU
pmdomain: core: introduce dev_pm_genpd_is_on()
pmdomain: ti: Select PM_GENERIC_DOMAINS
pmdomain: sunxi: sun20i-ppu: change to tristate and enable for ARCH_SUNXI
pmdomain: sunxi: add driver for Allwinner A523's PCK-600 power controller
pmdomain: sunxi: sun20i-ppu: add A523 support
pmdomain: samsung: Fix splash-screen handover by enforcing a sync_state
cpuidle: riscv-sbi: Drop redundant sync_state support
cpuidle: psci: Drop redundant sync_state support
pmdomain: core: Leave powered-on genpds on until sync_state
pmdomain: core: Leave powered-on genpds on until late_initcall_sync
pmdomain: core: Default to use of_genpd_sync_state() for genpd providers
driver core: Add dev_set_drv_sync_state()
pmdomain: core: Add common ->sync_state() support for genpd providers
driver core: Export get_dev_from_fwnode()
firmware: xilinx: Use of_genpd_sync_state()
firmware: xilinx: Don't share zynqmp_pm_init_finalize()
...

Documentation/devicetree/bindings/power/qcom,rpmpd.yaml

···
   compatible:
     oneOf:
       - enum:
+          - qcom,glymur-rpmhpd
           - qcom,mdm9607-rpmpd
           - qcom,milos-rpmhpd
           - qcom,msm8226-rpmpd

drivers/base/core.c

···
 	device_links_write_unlock();
 }
 
-#define get_dev_from_fwnode(fwnode)	get_device((fwnode)->dev)
-
 static bool fwnode_init_without_drv(struct fwnode_handle *fwnode)
 {
 	struct device *dev;
···
 	dev->of_node = to_of_node(fwnode);
 }
 EXPORT_SYMBOL_GPL(device_set_node);
+
+struct device *get_dev_from_fwnode(struct fwnode_handle *fwnode)
+{
+	return get_device((fwnode)->dev);
+}
+EXPORT_SYMBOL_GPL(get_dev_from_fwnode);
 
 int device_match_name(struct device *dev, const void *name)
 {

drivers/cpuidle/cpuidle-psci-domain.c

···
 };
 
 static LIST_HEAD(psci_pd_providers);
-static bool psci_pd_allow_domain_state;
 
 static int psci_pd_power_off(struct generic_pm_domain *pd)
 {
···
 
 	if (!state->data)
 		return 0;
-
-	if (!psci_pd_allow_domain_state)
-		return -EBUSY;
 
 	/* OSI mode is enabled, set the corresponding domain state. */
 	pd_state = state->data;
···
 	}
 }
 
-static void psci_cpuidle_domain_sync_state(struct device *dev)
-{
-	/*
-	 * All devices have now been attached/probed to the PM domain topology,
-	 * hence it's fine to allow domain states to be picked.
-	 */
-	psci_pd_allow_domain_state = true;
-}
-
 static const struct of_device_id psci_of_match[] = {
 	{ .compatible = "arm,psci-1.0" },
 	{}
···
 	.driver = {
 		.name = "psci-cpuidle-domain",
 		.of_match_table = psci_of_match,
-		.sync_state = psci_cpuidle_domain_sync_state,
 	},
 };
 

drivers/cpuidle/cpuidle-riscv-sbi.c

···
 static DEFINE_PER_CPU(struct sbi_domain_state, domain_state);
 static bool sbi_cpuidle_use_osi;
 static bool sbi_cpuidle_use_cpuhp;
-static bool sbi_cpuidle_pd_allow_domain_state;
 
 static inline void sbi_set_domain_state(u32 state)
 {
···
 	return ret;
 }
 
-static void sbi_cpuidle_domain_sync_state(struct device *dev)
-{
-	/*
-	 * All devices have now been attached/probed to the PM domain
-	 * topology, hence it's fine to allow domain states to be picked.
-	 */
-	sbi_cpuidle_pd_allow_domain_state = true;
-}
-
 #ifdef CONFIG_DT_IDLE_GENPD
 
 static int sbi_cpuidle_pd_power_off(struct generic_pm_domain *pd)
···
 
 	if (!state->data)
 		return 0;
-
-	if (!sbi_cpuidle_pd_allow_domain_state)
-		return -EBUSY;
 
 	/* OSI mode is enabled, set the corresponding domain state. */
 	pd_state = state->data;
···
 	.probe = sbi_cpuidle_probe,
 	.driver = {
 		.name = "sbi-cpuidle",
-		.sync_state = sbi_cpuidle_domain_sync_state,
 	},
 };
 

drivers/firmware/xilinx/zynqmp.c

···
 #include <linux/of.h>
 #include <linux/of_platform.h>
 #include <linux/platform_device.h>
+#include <linux/pm_domain.h>
 #include <linux/slab.h>
 #include <linux/uaccess.h>
 #include <linux/hashtable.h>
···
  * This API function is to be used for notify the power management controller
  * about the completed power management initialization.
  */
-int zynqmp_pm_init_finalize(void)
+static int zynqmp_pm_init_finalize(void)
 {
 	return zynqmp_pm_invoke_fn(PM_PM_INIT_FINALIZE, NULL, 0);
 }
-EXPORT_SYMBOL_GPL(zynqmp_pm_init_finalize);
 
 /**
  * zynqmp_pm_set_suspend_mode()	- Set system suspend mode
···
 	platform_device_unregister(em_dev);
 }
 
+static void zynqmp_firmware_sync_state(struct device *dev)
+{
+	struct device_node *np = dev->of_node;
+
+	if (!of_device_is_compatible(np, "xlnx,zynqmp-firmware"))
+		return;
+
+	of_genpd_sync_state(np);
+
+	if (zynqmp_pm_init_finalize())
+		dev_warn(dev, "failed to release power management to firmware\n");
+}
+
 static const struct of_device_id zynqmp_firmware_of_match[] = {
 	{.compatible = "xlnx,zynqmp-firmware"},
 	{.compatible = "xlnx,versal-firmware"},
···
 		.name = "zynqmp_firmware",
 		.of_match_table = zynqmp_firmware_of_match,
 		.dev_groups = zynqmp_firmware_groups,
+		.sync_state = zynqmp_firmware_sync_state,
 	},
 	.probe = zynqmp_firmware_probe,
 	.remove = zynqmp_firmware_remove,

drivers/pmdomain/amlogic/meson-secure-pwrc.c

···
 	return of_genpd_add_provider_onecell(pdev->dev.of_node, &pwrc->xlate);
 }
 
-static struct meson_secure_pwrc_domain_data meson_secure_a1_pwrc_data = {
+static const struct meson_secure_pwrc_domain_data meson_secure_a1_pwrc_data = {
 	.domains = a1_pwrc_domains,
 	.count = ARRAY_SIZE(a1_pwrc_domains),
 };
 
-static struct meson_secure_pwrc_domain_data amlogic_secure_a4_pwrc_data = {
+static const struct meson_secure_pwrc_domain_data amlogic_secure_a4_pwrc_data = {
 	.domains = a4_pwrc_domains,
 	.count = ARRAY_SIZE(a4_pwrc_domains),
 };
 
-static struct meson_secure_pwrc_domain_data amlogic_secure_a5_pwrc_data = {
+static const struct meson_secure_pwrc_domain_data amlogic_secure_a5_pwrc_data = {
 	.domains = a5_pwrc_domains,
 	.count = ARRAY_SIZE(a5_pwrc_domains),
 };
 
-static struct meson_secure_pwrc_domain_data amlogic_secure_c3_pwrc_data = {
+static const struct meson_secure_pwrc_domain_data amlogic_secure_c3_pwrc_data = {
 	.domains = c3_pwrc_domains,
 	.count = ARRAY_SIZE(c3_pwrc_domains),
 };
 
-static struct meson_secure_pwrc_domain_data meson_secure_s4_pwrc_data = {
+static const struct meson_secure_pwrc_domain_data meson_secure_s4_pwrc_data = {
 	.domains = s4_pwrc_domains,
 	.count = ARRAY_SIZE(s4_pwrc_domains),
 };
 
-static struct meson_secure_pwrc_domain_data amlogic_secure_t7_pwrc_data = {
+static const struct meson_secure_pwrc_domain_data amlogic_secure_t7_pwrc_data = {
 	.domains = t7_pwrc_domains,
 	.count = ARRAY_SIZE(t7_pwrc_domains),
 };

drivers/pmdomain/apple/Kconfig

···
 	select MFD_SYSCON
 	select PM_GENERIC_DOMAINS
 	select RESET_CONTROLLER
-	default ARCH_APPLE
 	help
 	  The PMGR block in Apple SoCs provides high-level power state
 	  controls for SoC devices. This driver manages them through the

drivers/pmdomain/arm/scmi_pm_domain.c

···
 
 #define to_scmi_pd(gpd) container_of(gpd, struct scmi_pm_domain, genpd)
 
-static int scmi_pd_power(struct generic_pm_domain *domain, bool power_on)
+static int scmi_pd_power(struct generic_pm_domain *domain, u32 state)
 {
-	u32 state;
 	struct scmi_pm_domain *pd = to_scmi_pd(domain);
-
-	if (power_on)
-		state = SCMI_POWER_STATE_GENERIC_ON;
-	else
-		state = SCMI_POWER_STATE_GENERIC_OFF;
 
 	return power_ops->state_set(pd->ph, pd->domain, state);
 }
 
 static int scmi_pd_power_on(struct generic_pm_domain *domain)
 {
-	return scmi_pd_power(domain, true);
+	return scmi_pd_power(domain, SCMI_POWER_STATE_GENERIC_ON);
 }
 
 static int scmi_pd_power_off(struct generic_pm_domain *domain)
 {
-	return scmi_pd_power(domain, false);
+	return scmi_pd_power(domain, SCMI_POWER_STATE_GENERIC_OFF);
 }
 
 static int scmi_pm_domain_probe(struct scmi_device *sdev)

drivers/pmdomain/core.c

···
 /* Provides a unique ID for each genpd device */
 static DEFINE_IDA(genpd_ida);
 
+/* The bus for genpd_providers. */
+static const struct bus_type genpd_provider_bus_type = {
+	.name		= "genpd_provider",
+};
+
+/* The parent for genpd_provider devices. */
+static struct device genpd_provider_bus = {
+	.init_name = "genpd_provider",
+};
+
 #define GENPD_RETRY_MAX_MS	250		/* Approximate */
 
 #define GENPD_DEV_CALLBACK(genpd, type, callback, dev)		\
···
 #define genpd_is_rpm_always_on(genpd)	(genpd->flags & GENPD_FLAG_RPM_ALWAYS_ON)
 #define genpd_is_opp_table_fw(genpd)	(genpd->flags & GENPD_FLAG_OPP_TABLE_FW)
 #define genpd_is_dev_name_fw(genpd)	(genpd->flags & GENPD_FLAG_DEV_NAME_FW)
+#define genpd_is_no_sync_state(genpd)	(genpd->flags & GENPD_FLAG_NO_SYNC_STATE)
 
 static inline bool irq_safe_dev_in_sleep_domain(struct device *dev,
 		const struct generic_pm_domain *genpd)
···
 EXPORT_SYMBOL_GPL(dev_pm_genpd_rpm_always_on);
 
 /**
+ * dev_pm_genpd_is_on() - Get device's current power domain status
+ *
+ * @dev: Device to get the current power status
+ *
+ * This function checks whether the generic power domain associated with the
+ * given device is on or not by verifying if genpd_status_on equals
+ * GENPD_STATE_ON.
+ *
+ * Note: this function returns the power status of the genpd at the time of the
+ * call. The power status may change after due to activity from other devices
+ * sharing the same genpd. Therefore, this information should not be relied for
+ * long-term decisions about the device power state.
+ *
+ * Return: 'true' if the device's power domain is on, 'false' otherwise.
+ */
+bool dev_pm_genpd_is_on(struct device *dev)
+{
+	struct generic_pm_domain *genpd;
+	bool is_on;
+
+	genpd = dev_to_genpd_safe(dev);
+	if (!genpd)
+		return false;
+
+	genpd_lock(genpd);
+	is_on = genpd_status_on(genpd);
+	genpd_unlock(genpd);
+
+	return is_on;
+}
+EXPORT_SYMBOL_GPL(dev_pm_genpd_is_on);
+
+/**
  * pm_genpd_inc_rejected() - Adjust the rejected/usage counts for an idle-state.
  *
  * @genpd: The PM domain the idle-state belongs to.
···
 	 * The domain is already in the "power off" state.
 	 * System suspend is in progress.
 	 * The domain is configured as always on.
+	 * The domain was on at boot and still need to stay on.
 	 * The domain has a subdomain being powered on.
 	 */
 	if (!genpd_status_on(genpd) || genpd->prepared_count > 0 ||
 	    genpd_is_always_on(genpd) || genpd_is_rpm_always_on(genpd) ||
-	    atomic_read(&genpd->sd_count) > 0)
+	    genpd->stay_on || atomic_read(&genpd->sd_count) > 0)
 		return;
 
 	/*
···
 	return ret;
 }
 
+#ifndef CONFIG_PM_GENERIC_DOMAINS_OF
 static bool pd_ignore_unused;
 static int __init pd_ignore_unused_setup(char *__unused)
 {
···
 	pr_info("genpd: Disabling unused power domains\n");
 	mutex_lock(&gpd_list_lock);
 
-	list_for_each_entry(genpd, &gpd_list, gpd_list_node)
+	list_for_each_entry(genpd, &gpd_list, gpd_list_node) {
+		genpd_lock(genpd);
+		genpd->stay_on = false;
+		genpd_unlock(genpd);
 		genpd_queue_power_off_work(genpd);
+	}
 
 	mutex_unlock(&gpd_list_lock);
 
 	return 0;
 }
 late_initcall_sync(genpd_power_off_unused);
+#endif
 
 #ifdef CONFIG_PM_SLEEP
 
···
 	genpd->gd = gd;
 	device_initialize(&genpd->dev);
 	genpd->dev.release = genpd_provider_release;
+	genpd->dev.bus = &genpd_provider_bus_type;
+	genpd->dev.parent = &genpd_provider_bus;
 
 	if (!genpd_is_dev_name_fw(genpd)) {
 		dev_set_name(&genpd->dev, "%s", genpd->name);
···
 	INIT_WORK(&genpd->power_off_work, genpd_power_off_work_fn);
 	atomic_set(&genpd->sd_count, 0);
 	genpd->status = is_off ? GENPD_STATE_OFF : GENPD_STATE_ON;
+	genpd->stay_on = !is_off;
+	genpd->sync_state = GENPD_SYNC_STATE_OFF;
 	genpd->device_count = 0;
 	genpd->provider = NULL;
 	genpd->device_id = -ENXIO;
···
 static LIST_HEAD(of_genpd_providers);
 /* Mutex to protect the list above. */
 static DEFINE_MUTEX(of_genpd_mutex);
+/* Used to prevent registering devices before the bus. */
+static bool genpd_bus_registered;
 
 /**
  * genpd_xlate_simple() - Xlate function for direct node-domain mapping
···
 	cp->node = of_node_get(np);
 	cp->data = data;
 	cp->xlate = xlate;
-	fwnode_dev_initialized(&np->fwnode, true);
+	fwnode_dev_initialized(of_fwnode_handle(np), true);
 
 	mutex_lock(&of_genpd_mutex);
 	list_add(&cp->link, &of_genpd_providers);
···
 	return ret;
 }
 
+static void genpd_sync_state(struct device *dev)
+{
+	return of_genpd_sync_state(dev->of_node);
+}
+
 /**
  * of_genpd_add_provider_simple() - Register a simple PM domain provider
  * @np: Device node pointer associated with the PM domain provider.
···
 int of_genpd_add_provider_simple(struct device_node *np,
 				 struct generic_pm_domain *genpd)
 {
+	struct fwnode_handle *fwnode;
+	struct device *dev;
 	int ret;
 
 	if (!np || !genpd)
 		return -EINVAL;
+
+	if (!genpd_bus_registered)
+		return -ENODEV;
 
 	if (!genpd_present(genpd))
 		return -EINVAL;
 
 	genpd->dev.of_node = np;
 
+	fwnode = of_fwnode_handle(np);
+	dev = get_dev_from_fwnode(fwnode);
+	if (!dev && !genpd_is_no_sync_state(genpd)) {
+		genpd->sync_state = GENPD_SYNC_STATE_SIMPLE;
+		device_set_node(&genpd->dev, fwnode);
+	} else {
+		dev_set_drv_sync_state(dev, genpd_sync_state);
+	}
+
+	put_device(dev);
+
+	ret = device_add(&genpd->dev);
+	if (ret)
+		return ret;
+
 	/* Parse genpd OPP table */
 	if (!genpd_is_opp_table_fw(genpd) && genpd->set_performance_state) {
 		ret = dev_pm_opp_of_add_table(&genpd->dev);
-		if (ret)
-			return dev_err_probe(&genpd->dev, ret, "Failed to add OPP table\n");
+		if (ret) {
+			dev_err_probe(&genpd->dev, ret, "Failed to add OPP table\n");
+			goto err_del;
+		}
 
 		/*
 		 * Save table for faster processing while setting performance
···
 	}
 
 	ret = genpd_add_provider(np, genpd_xlate_simple, genpd);
-	if (ret) {
-		if (genpd->opp_table) {
-			dev_pm_opp_put_opp_table(genpd->opp_table);
-			dev_pm_opp_of_remove_table(&genpd->dev);
-		}
+	if (ret)
+		goto err_opp;
 
-		return ret;
-	}
-
-	genpd->provider = &np->fwnode;
+	genpd->provider = fwnode;
 	genpd->has_provider = true;
 
 	return 0;
+
+err_opp:
+	if (genpd->opp_table) {
+		dev_pm_opp_put_opp_table(genpd->opp_table);
+		dev_pm_opp_of_remove_table(&genpd->dev);
+	}
+err_del:
+	device_del(&genpd->dev);
+	return ret;
 }
 EXPORT_SYMBOL_GPL(of_genpd_add_provider_simple);
 
···
 				  struct genpd_onecell_data *data)
 {
 	struct generic_pm_domain *genpd;
+	struct fwnode_handle *fwnode;
+	struct device *dev;
 	unsigned int i;
 	int ret = -EINVAL;
+	bool sync_state = false;
 
 	if (!np || !data)
 		return -EINVAL;
 
+	if (!genpd_bus_registered)
+		return -ENODEV;
+
 	if (!data->xlate)
 		data->xlate = genpd_xlate_onecell;
+
+	fwnode = of_fwnode_handle(np);
+	dev = get_dev_from_fwnode(fwnode);
+	if (!dev)
+		sync_state = true;
+	else
+		dev_set_drv_sync_state(dev, genpd_sync_state);
+
+	put_device(dev);
 
 	for (i = 0; i < data->num_domains; i++) {
 		genpd = data->domains[i];
···
 
 		genpd->dev.of_node = np;
 
+		if (sync_state && !genpd_is_no_sync_state(genpd)) {
+			genpd->sync_state = GENPD_SYNC_STATE_ONECELL;
+			device_set_node(&genpd->dev, fwnode);
+			sync_state = false;
+		}
+
+		ret = device_add(&genpd->dev);
+		if (ret)
+			goto error;
+
 		/* Parse genpd OPP table */
 		if (!genpd_is_opp_table_fw(genpd) && genpd->set_performance_state) {
 			ret = dev_pm_opp_of_add_table_indexed(&genpd->dev, i);
 			if (ret) {
 				dev_err_probe(&genpd->dev, ret,
 					      "Failed to add OPP table for index %d\n", i);
+				device_del(&genpd->dev);
 				goto error;
 			}
 
···
 			WARN_ON(IS_ERR(genpd->opp_table));
 		}
 
-		genpd->provider = &np->fwnode;
+		genpd->provider = fwnode;
 		genpd->has_provider = true;
 	}
 
···
 			dev_pm_opp_put_opp_table(genpd->opp_table);
 			dev_pm_opp_of_remove_table(&genpd->dev);
 		}
+
+		device_del(&genpd->dev);
 	}
 
 	return ret;
···
 			 * so that the PM domain can be safely removed.
 			 */
 			list_for_each_entry(gpd, &gpd_list, gpd_list_node) {
-				if (gpd->provider == &np->fwnode) {
+				if (gpd->provider == of_fwnode_handle(np)) {
 					gpd->has_provider = false;
 
 					if (gpd->opp_table) {
 						dev_pm_opp_put_opp_table(gpd->opp_table);
 						dev_pm_opp_of_remove_table(&gpd->dev);
 					}
+
+					device_del(&gpd->dev);
 				}
 			}
 
-			fwnode_dev_initialized(&cp->node->fwnode, false);
+			fwnode_dev_initialized(of_fwnode_handle(cp->node), false);
 			list_del(&cp->link);
 			of_node_put(cp->node);
 			kfree(cp);
···
 
 	mutex_lock(&gpd_list_lock);
 	list_for_each_entry_safe(gpd, tmp, &gpd_list, gpd_list_node) {
-		if (gpd->provider == &np->fwnode) {
+		if (gpd->provider == of_fwnode_handle(np)) {
 			ret = genpd_remove(gpd);
 			genpd = ret ? ERR_PTR(ret) : gpd;
 			break;
···
 	if (num_domains < 0 || index >= num_domains)
 		return NULL;
 
+	if (!genpd_bus_registered)
+		return ERR_PTR(-ENODEV);
+
 	/* Allocate and register device on the genpd bus. */
 	virt_dev = kzalloc(sizeof(*virt_dev), GFP_KERNEL);
 	if (!virt_dev)
···
 
 	genpd_state->power_on_latency_ns = 1000LL * exit_latency;
 	genpd_state->power_off_latency_ns = 1000LL * entry_latency;
-	genpd_state->fwnode = &state_node->fwnode;
+	genpd_state->fwnode = of_fwnode_handle(state_node);
 
 	return 0;
 }
···
 }
 EXPORT_SYMBOL_GPL(of_genpd_parse_idle_states);
 
+/**
+ * of_genpd_sync_state() - A common sync_state function for genpd providers
+ * @np: The device node the genpd provider is associated with.
+ *
+ * The @np that corresponds to a genpd provider may provide one or multiple
+ * genpds. This function makes use @np to find the genpds that belongs to the
+ * provider. For each genpd we try a power-off.
+ */
+void of_genpd_sync_state(struct device_node *np)
+{
+	struct generic_pm_domain *genpd;
+
+	if (!np)
+		return;
+
+	mutex_lock(&gpd_list_lock);
+	list_for_each_entry(genpd, &gpd_list, gpd_list_node) {
+		if (genpd->provider == of_fwnode_handle(np)) {
+			genpd_lock(genpd);
+			genpd->stay_on = false;
+			genpd_power_off(genpd, false, 0);
+			genpd_unlock(genpd);
+		}
+	}
+	mutex_unlock(&gpd_list_lock);
+}
+EXPORT_SYMBOL_GPL(of_genpd_sync_state);
+
+static int genpd_provider_probe(struct device *dev)
+{
+	return 0;
+}
+
+static void genpd_provider_sync_state(struct device *dev)
+{
+	struct generic_pm_domain *genpd = container_of(dev, struct generic_pm_domain, dev);
+
+	switch (genpd->sync_state) {
+	case GENPD_SYNC_STATE_OFF:
+		break;
+
+	case GENPD_SYNC_STATE_ONECELL:
+		of_genpd_sync_state(dev->of_node);
+		break;
+
+	case GENPD_SYNC_STATE_SIMPLE:
+		genpd_lock(genpd);
+		genpd->stay_on = false;
+		genpd_power_off(genpd, false, 0);
+		genpd_unlock(genpd);
+		break;
+
+	default:
+		break;
+	}
+}
+
+static struct device_driver genpd_provider_drv = {
+	.name = "genpd_provider",
+	.bus = &genpd_provider_bus_type,
+	.probe = genpd_provider_probe,
+	.sync_state = genpd_provider_sync_state,
+	.suppress_bind_attrs = true,
+};
+
 static int __init genpd_bus_init(void)
 {
-	return bus_register(&genpd_bus_type);
+	int ret;
+
+	ret = device_register(&genpd_provider_bus);
+	if (ret) {
+		put_device(&genpd_provider_bus);
+		return ret;
+	}
+
+	ret = bus_register(&genpd_provider_bus_type);
+	if (ret)
+		goto err_dev;
+
+	ret = bus_register(&genpd_bus_type);
+	if (ret)
+		goto err_prov_bus;
+
+	ret = driver_register(&genpd_provider_drv);
+	if (ret)
+		goto err_bus;
+
+	genpd_bus_registered = true;
+	return 0;
+
+err_bus:
+	bus_unregister(&genpd_bus_type);
+err_prov_bus:
+	bus_unregister(&genpd_provider_bus_type);
+err_dev:
+	device_unregister(&genpd_provider_bus);
+	return ret;
 }
 core_initcall(genpd_bus_init);
 

drivers/pmdomain/imx/imx8m-blk-ctrl.c

···
 #define  LCDIF_1_RD_HURRY	GENMASK(15, 13)
 #define  LCDIF_0_RD_HURRY	GENMASK(12, 10)
 
+#define ISI_CACHE_CTRL		0x50
+#define  ISI_V_WR_HURRY		GENMASK(28, 26)
+#define  ISI_U_WR_HURRY		GENMASK(25, 23)
+#define  ISI_Y_WR_HURRY		GENMASK(22, 20)
+
 static int imx8mp_media_power_notifier(struct notifier_block *nb,
 				unsigned long action, void *data)
 {
···
 		regmap_set_bits(bc->regmap, LCDIF_ARCACHE_CTRL,
 				FIELD_PREP(LCDIF_1_RD_HURRY, 7) |
 				FIELD_PREP(LCDIF_0_RD_HURRY, 7));
+		/* Same here for ISI */
+		regmap_set_bits(bc->regmap, ISI_CACHE_CTRL,
+				FIELD_PREP(ISI_V_WR_HURRY, 7) |
+				FIELD_PREP(ISI_U_WR_HURRY, 7) |
+				FIELD_PREP(ISI_Y_WR_HURRY, 7));
 	}
 
 	return NOTIFY_OK;

drivers/pmdomain/qcom/rpmhpd.c

···
 	.res_name = "gmxc.lvl",
 };
 
+/* Milos RPMH powerdomains */
+static struct rpmhpd *milos_rpmhpds[] = {
+	[RPMHPD_CX] = &cx,
+	[RPMHPD_CX_AO] = &cx_ao,
+	[RPMHPD_EBI] = &ebi,
+	[RPMHPD_GFX] = &gfx,
+	[RPMHPD_LCX] = &lcx,
+	[RPMHPD_LMX] = &lmx,
+	[RPMHPD_MSS] = &mss,
+	[RPMHPD_MX] = &mx,
+	[RPMHPD_MX_AO] = &mx_ao,
+};
+
+static const struct rpmhpd_desc milos_desc = {
+	.rpmhpds = milos_rpmhpds,
+	.num_pds = ARRAY_SIZE(milos_rpmhpds),
+};
+
 /* SA8540P RPMH powerdomains */
 static struct rpmhpd *sa8540p_rpmhpds[] = {
 	[SC8280XP_CX] = &cx,
···
 	.num_pds = ARRAY_SIZE(sc8280xp_rpmhpds),
 };
 
+/* Glymur RPMH powerdomains */
+static struct rpmhpd *glymur_rpmhpds[] = {
+	[RPMHPD_CX] = &cx,
+	[RPMHPD_CX_AO] = &cx_ao,
+	[RPMHPD_EBI] = &ebi,
+	[RPMHPD_GFX] = &gfx,
+	[RPMHPD_LCX] = &lcx,
+	[RPMHPD_LMX] = &lmx,
+	[RPMHPD_MMCX] = &mmcx,
+	[RPMHPD_MMCX_AO] = &mmcx_ao,
+	[RPMHPD_MX] = &mx,
+	[RPMHPD_MX_AO] = &mx_ao,
+	[RPMHPD_MXC] = &mxc,
+	[RPMHPD_MXC_AO] = &mxc_ao,
+	[RPMHPD_MSS] = &mss,
+	[RPMHPD_NSP] = &nsp,
+	[RPMHPD_NSP2] = &nsp2,
+	[RPMHPD_GMXC] = &gmxc,
+};
+
+static const struct rpmhpd_desc glymur_desc = {
+	.rpmhpds = glymur_rpmhpds,
+	.num_pds = ARRAY_SIZE(glymur_rpmhpds),
+};
+
 /* X1E80100 RPMH powerdomains */
 static struct rpmhpd *x1e80100_rpmhpds[] = {
 	[RPMHPD_CX] = &cx,
···
 };
 
 static const struct of_device_id rpmhpd_match_table[] = {
+	{ .compatible = "qcom,glymur-rpmhpd", .data = &glymur_desc },
+	{ .compatible = "qcom,milos-rpmhpd", .data = &milos_desc },
 	{ .compatible = "qcom,qcs615-rpmhpd", .data = &qcs615_desc },
 	{ .compatible = "qcom,qcs8300-rpmhpd", .data = &qcs8300_desc },
 	{ .compatible = "qcom,qdu1000-rpmhpd", .data = &qdu1000_desc },
···
 	struct rpmhpd *pd;
 	unsigned int i;
 	int ret;
+
+	of_genpd_sync_state(dev->of_node);
 
 	mutex_lock(&rpmhpd_lock);
 	for (i = 0; i < desc->num_pds; i++) {

drivers/pmdomain/qcom/rpmpd.c

···
 	unsigned int i;
 	int ret;
 
+	of_genpd_sync_state(dev->of_node);
+
 	mutex_lock(&rpmpd_lock);
 	for (i = 0; i < desc->num_pds; i++) {
 		pd = rpmpds[i];

drivers/pmdomain/renesas/Kconfig

···
 # SPDX-License-Identifier: GPL-2.0
 if SOC_RENESAS
+menu "Renesas PM Domains"
 
+# SoC Family
 config SYSC_RCAR
 	bool "System Controller support for R-Car" if COMPILE_TEST
 
 config SYSC_RCAR_GEN4
 	bool "System Controller support for R-Car Gen4" if COMPILE_TEST
 
-config SYSC_R8A77995
-	bool "System Controller support for R-Car D3" if COMPILE_TEST
-	select SYSC_RCAR
-
-config SYSC_R8A7794
-	bool "System Controller support for R-Car E2" if COMPILE_TEST
-	select SYSC_RCAR
-
-config SYSC_R8A77990
-	bool "System Controller support for R-Car E3" if COMPILE_TEST
-	select SYSC_RCAR
-
-config SYSC_R8A7779
-	bool "System Controller support for R-Car H1" if COMPILE_TEST
-	select SYSC_RCAR
-
-config SYSC_R8A7790
-	bool "System Controller support for R-Car H2" if COMPILE_TEST
-	select SYSC_RCAR
-
-config SYSC_R8A7795
-	bool "System Controller support for R-Car H3" if COMPILE_TEST
-	select SYSC_RCAR
-
-config SYSC_R8A7791
-	bool "System Controller support for R-Car M2-W/N" if COMPILE_TEST
-	select SYSC_RCAR
-
-config SYSC_R8A77965
-	bool "System Controller support for R-Car M3-N" if COMPILE_TEST
-	select SYSC_RCAR
-
-config SYSC_R8A77960
-	bool "System Controller support for R-Car M3-W" if COMPILE_TEST
-	select SYSC_RCAR
-
-config SYSC_R8A77961
-	bool "System Controller support for R-Car M3-W+" if COMPILE_TEST
-	select SYSC_RCAR
-
-config SYSC_R8A779F0
-	bool "System Controller support for R-Car S4-8" if COMPILE_TEST
-	select SYSC_RCAR_GEN4
-
-config SYSC_R8A7792
-	bool "System Controller support for R-Car V2H" if COMPILE_TEST
-	select SYSC_RCAR
-
-config SYSC_R8A77980
-	bool "System Controller support for R-Car V3H" if COMPILE_TEST
-	select SYSC_RCAR
-
-config SYSC_R8A77970
-	bool "System Controller support for R-Car V3M" if COMPILE_TEST
-	select SYSC_RCAR
-
-config SYSC_R8A779A0
-	bool "System Controller support for R-Car V3U" if COMPILE_TEST
-	select SYSC_RCAR_GEN4
-
-config SYSC_R8A779G0
-	bool "System Controller support for R-Car V4H" if COMPILE_TEST
-	select SYSC_RCAR_GEN4
-
-config SYSC_R8A779H0
-	bool "System Controller support for R-Car V4M" if COMPILE_TEST
-	select SYSC_RCAR_GEN4
-
 config SYSC_RMOBILE
 	bool "System Controller support for R-Mobile" if COMPILE_TEST
 
-config SYSC_R8A77470
-	bool "System Controller support for RZ/G1C" if COMPILE_TEST
-	select SYSC_RCAR
-
-config SYSC_R8A7745
-	bool "System Controller support for RZ/G1E" if COMPILE_TEST
-	select SYSC_RCAR
-
+# SoC
 config SYSC_R8A7742
-	bool "System Controller support for RZ/G1H" if COMPILE_TEST
+	bool "System Controller support for R8A7742 (RZ/G1H)" if COMPILE_TEST
 	select SYSC_RCAR
 
 config SYSC_R8A7743
-	bool "System Controller support for RZ/G1M" if COMPILE_TEST
+	bool "System Controller support for R8A7743 (RZ/G1M)" if COMPILE_TEST
 	select SYSC_RCAR
 
-config SYSC_R8A774C0
-	bool "System Controller support for RZ/G2E" if COMPILE_TEST
+config SYSC_R8A7745
+	bool "System Controller support for R8A7745 (RZ/G1E)" if COMPILE_TEST
 	select SYSC_RCAR
 
-config SYSC_R8A774E1
-	bool "System Controller support for RZ/G2H" if COMPILE_TEST
+config SYSC_R8A77470
+	bool "System Controller support for R8A77470 (RZ/G1C)" if COMPILE_TEST
 	select SYSC_RCAR
 
 config SYSC_R8A774A1
-	bool "System Controller support for RZ/G2M" if COMPILE_TEST
+	bool "System Controller support for R8A774A1 (RZ/G2M)" if COMPILE_TEST
 	select SYSC_RCAR
 
 config SYSC_R8A774B1
-	bool "System Controller support for RZ/G2N" if COMPILE_TEST
+	bool "System Controller support for R8A774B1 (RZ/G2N)" if COMPILE_TEST
 	select SYSC_RCAR
 
+config SYSC_R8A774C0
+	bool "System Controller support for R8A774C0 (RZ/G2E)" if COMPILE_TEST
+	select SYSC_RCAR
+
+config SYSC_R8A774E1
+	bool "System Controller support for R8A774E1 (RZ/G2H)" if COMPILE_TEST
+	select SYSC_RCAR
+
+config SYSC_R8A7779
+	bool "System Controller support for R8A7779 (R-Car H1)" if COMPILE_TEST
+	select SYSC_RCAR
+
+config SYSC_R8A7790
+	bool "System Controller support for R8A7790 (R-Car H2)" if COMPILE_TEST
+	select SYSC_RCAR
+
+config SYSC_R8A7791
+	bool "System Controller support for R8A7791/R8A7793 (R-Car M2-W/N)" if COMPILE_TEST
+	select SYSC_RCAR
+
+config SYSC_R8A7792
+	bool "System Controller support for R8A7792 (R-Car V2H)" if COMPILE_TEST
+	select SYSC_RCAR
+
+config SYSC_R8A7794
+	bool "System Controller support for R8A7794 (R-Car E2)" if COMPILE_TEST
+	select SYSC_RCAR
+
+config SYSC_R8A7795
+	bool "System Controller support for R8A7795 (R-Car H3)" if COMPILE_TEST
+	select SYSC_RCAR
+
+config SYSC_R8A77960
+	bool "System Controller support for R8A77960 (R-Car M3-W)" if COMPILE_TEST
+	select SYSC_RCAR
+
+config SYSC_R8A77961
+	bool "System Controller support for R8A77961 (R-Car M3-W+)" if COMPILE_TEST
+	select SYSC_RCAR
+
+config SYSC_R8A77965
+	bool "System Controller support for R8A77965 (R-Car M3-N)" if COMPILE_TEST
+	select SYSC_RCAR
+
+config SYSC_R8A77970
+	bool "System Controller support for R8A77970 (R-Car V3M)" if COMPILE_TEST
+	select SYSC_RCAR
+
+config SYSC_R8A77980
+	bool "System Controller support for R8A77980 (R-Car V3H)" if COMPILE_TEST
+	select SYSC_RCAR
+
+config SYSC_R8A77990
+	bool "System Controller support for R8A77990 (R-Car E3)" if COMPILE_TEST
+	select SYSC_RCAR
+
+config SYSC_R8A77995
+	bool "System Controller support for R8A77995 (R-Car D3)" if COMPILE_TEST
+	select SYSC_RCAR
+
+config SYSC_R8A779A0
+	bool "System Controller support for R8A779A0 (R-Car V3U)" if COMPILE_TEST
+	select SYSC_RCAR_GEN4
+
+config SYSC_R8A779F0
+	bool "System Controller support for R8A779F0 (R-Car S4-8)" if COMPILE_TEST
+	select SYSC_RCAR_GEN4
+
+config SYSC_R8A779G0
+	bool "System Controller support for R8A779G0 (R-Car V4H)" if COMPILE_TEST
+	select SYSC_RCAR_GEN4
+
+config SYSC_R8A779H0
+	bool "System Controller support for R8A779H0 (R-Car V4M)" if COMPILE_TEST
+	select SYSC_RCAR_GEN4
+
+endmenu
 endif

drivers/pmdomain/renesas/rcar-gen4-sysc.c

···
 	of_node_put(np);
 	return error;
 }
-early_initcall(rcar_gen4_sysc_pd_init);
+postcore_initcall(rcar_gen4_sysc_pd_init);

drivers/pmdomain/renesas/rcar-sysc.c

···
 };
 
 static struct genpd_onecell_data *rcar_sysc_onecell_data;
+static struct device_node *rcar_sysc_onecell_np;
 
 static int __init rcar_sysc_pd_init(void)
 {
···
 		}
 	}
 
-	error = of_genpd_add_provider_onecell(np, &domains->onecell_data);
+	rcar_sysc_onecell_np = np;
+	return 0;
 
 out_put:
 	of_node_put(np);
 	return error;
 }
 early_initcall(rcar_sysc_pd_init);
+
+static int __init rcar_sysc_pd_init_provider(void)
+{
+	int error;
+
+	if (!rcar_sysc_onecell_np)
+		return -ENODEV;
+
+	error = of_genpd_add_provider_onecell(rcar_sysc_onecell_np,
+					      rcar_sysc_onecell_data);
+
+	of_node_put(rcar_sysc_onecell_np);
+	return error;
+}
+postcore_initcall(rcar_sysc_pd_init_provider);
 
 #ifdef CONFIG_ARCH_R8A7779
 static int rcar_sysc_power_cpu(unsigned int idx, bool on)

drivers/pmdomain/renesas/rmobile-sysc.c

···
 
 	return ret;
 }
-
-core_initcall(rmobile_init_pm_domains);
+postcore_initcall(rmobile_init_pm_domains);

drivers/pmdomain/rockchip/pm-domains.c

···
 #include <dt-bindings/power/rk3366-power.h>
 #include <dt-bindings/power/rk3368-power.h>
 #include <dt-bindings/power/rk3399-power.h>
+#include <dt-bindings/power/rockchip,rk3528-power.h>
 #include <dt-bindings/power/rockchip,rk3562-power.h>
 #include <dt-bindings/power/rk3568-power.h>
 #include <dt-bindings/power/rockchip,rk3576-power.h>
···
 
 #define DOMAIN_RK3399(name, pwr, status, req, wakeup)		\
 	DOMAIN(name, pwr, status, req, req, req, wakeup)
+
+#define DOMAIN_RK3528(name, pwr, req)		\
+	DOMAIN_M(name, pwr, pwr, req, req, req, false)
 
 #define DOMAIN_RK3562(name, pwr, req, g_mask, mem, wakeup)		\
 	DOMAIN_M_G_SD(name, pwr, pwr, req, req, req, g_mask, mem, wakeup, false)
···
 	[RK3399_PD_SDIOAUDIO]	= DOMAIN_RK3399("sdioaudio", BIT(31), BIT(31), BIT(29), true),
 };
 
+static const struct rockchip_domain_info rk3528_pm_domains[] = {
+	[RK3528_PD_GPU]		= DOMAIN_RK3528("gpu",  BIT(0), BIT(4)),
+	[RK3528_PD_RKVDEC]	= DOMAIN_RK3528("vdec",      0, BIT(5)),
+	[RK3528_PD_RKVENC]	= DOMAIN_RK3528("venc",      0, BIT(6)),
+	[RK3528_PD_VO]		= DOMAIN_RK3528("vo",        0, BIT(7)),
+	[RK3528_PD_VPU]		= DOMAIN_RK3528("vpu",       0, BIT(8)),
+};
+
 static const struct rockchip_domain_info rk3562_pm_domains[] = {
 					     /* name           pwr     req     g_mask  mem wakeup */
 	[RK3562_PD_GPU]		= DOMAIN_RK3562("gpu",         BIT(0), BIT(1), BIT(1), 0, false),
···
 	.domain_info = rk3399_pm_domains,
 };
 
+static const struct rockchip_pmu_info rk3528_pmu = {
+	.pwr_offset = 0x1210,
+	.status_offset = 0x1230,
+	.req_offset = 0x1110,
+	.idle_offset = 0x1128,
+	.ack_offset = 0x1120,
+
+	.num_domains = ARRAY_SIZE(rk3528_pm_domains),
+	.domain_info = rk3528_pm_domains,
+};
+
 static const struct rockchip_pmu_info rk3562_pmu = {
 	.pwr_offset = 0x210,
 	.status_offset = 0x230,
···
 	{
 		.compatible = "rockchip,rk3399-power-controller",
 		.data = (void *)&rk3399_pmu,
+	},
+	{
+		.compatible = "rockchip,rk3528-power-controller",
+		.data = (void *)&rk3528_pmu,
 	},
 	{
 		.compatible = "rockchip,rk3562-power-controller",

drivers/pmdomain/samsung/exynos-pm-domains.c

···
 				parent.np, child.np);
 	}
 
+	/*
+	 * Some Samsung platforms with bootloaders turning on the splash-screen
+	 * and handing it over to the kernel, requires the power-domains to be
+	 * reset during boot. As a temporary hack to manage this, let's enforce
+	 * a sync_state.
+	 */
+	if (!ret)
+		of_genpd_sync_state(np);
+
 	pm_runtime_enable(dev);
 	return ret;
 }

drivers/pmdomain/sunxi/Kconfig

···
 # SPDX-License-Identifier: GPL-2.0-only
 
 config SUN20I_PPU
-	bool "Allwinner D1 PPU power domain driver"
+	tristate "Allwinner D1 PPU power domain driver"
 	depends on ARCH_SUNXI || COMPILE_TEST
 	depends on PM
+	default ARCH_SUNXI
 	select PM_GENERIC_DOMAINS
 	help
-	  Say y to enable the PPU power domain driver. This saves power
-	  when certain peripherals, such as the video engine, are idle.
+	  Say y to enable the PPU power domain driver. This is required
+	  to enable power to certain peripherals, such as the display
+	  engine.
 
 config SUN50I_H6_PRCM_PPU
 	tristate "Allwinner H6 PRCM power domain driver"
···
 	  Say y to enable the Allwinner H6/H616 PRCM power domain driver.
 	  This is required to enable the Mali GPU in the H616 SoC, it is
 	  optional for the H6.
+
+config SUN55I_PCK600
+	tristate "Allwinner A523 PCK-600 power domain driver"
+	depends on ARCH_SUNXI || COMPILE_TEST
+	depends on PM
+	default ARCH_SUNXI
+	select PM_GENERIC_DOMAINS
+	help
+	  Say y to enable the PCK-600 power domain driver. This is required
+	  to enable power to certain peripherals, such as the display and
+	  video engines.

drivers/pmdomain/sunxi/Makefile

···
 # SPDX-License-Identifier: GPL-2.0-only
 obj-$(CONFIG_SUN20I_PPU)		+= sun20i-ppu.o
 obj-$(CONFIG_SUN50I_H6_PRCM_PPU)	+= sun50i-h6-prcm-ppu.o
+obj-$(CONFIG_SUN55I_PCK600)		+= sun55i-pck600.o

drivers/pmdomain/sunxi/sun20i-ppu.c

···
 	.num_domains	= ARRAY_SIZE(sun8i_v853_ppu_pd_names),
 };
 
+static const char *const sun55i_a523_ppu_pd_names[] = {
+	"DSP",
+	"NPU",
+	"AUDIO",
+	"SRAM",
+	"RISCV",
+};
+
+static const struct sun20i_ppu_desc sun55i_a523_ppu_desc = {
+	.names		= sun55i_a523_ppu_pd_names,
+	.num_domains	= ARRAY_SIZE(sun55i_a523_ppu_pd_names),
+};
+
 static const struct of_device_id sun20i_ppu_of_match[] = {
 	{
 		.compatible	= "allwinner,sun20i-d1-ppu",
···
 	{
 		.compatible	= "allwinner,sun8i-v853-ppu",
 		.data		= &sun8i_v853_ppu_desc,
+	},
+	{
+		.compatible	= "allwinner,sun55i-a523-ppu",
+		.data		= &sun55i_a523_ppu_desc,
 	},
 	{ }
 };

drivers/pmdomain/sunxi/sun55i-pck600.c

···
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Allwinner PCK-600 power domain support
+ *
+ * Copyright (c) 2025 Chen-Yu Tsai <[e-mail]>
+ *
+ * The hardware is likely based on the Arm PCK-600 IP, since some of
+ * the registers match Arm's documents, with additional delay controls
+ * that are in registers listed as reserved.
+ *
+ * Documents include:
+ * - "Arm CoreLink PCK-600 Power Control Kit" TRM
+ * - "Arm Power Policy Unit" architecture specification (DEN0051E)
+ */
+
+#include <linux/bitfield.h>
+#include <linux/clk.h>
+#include <linux/container_of.h>
+#include <linux/device.h>
+#include <linux/dev_printk.h>
+#include <linux/err.h>
+#include <linux/io.h>
+#include <linux/iopoll.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/platform_device.h>
+#include <linux/pm_domain.h>
+#include <linux/reset.h>
+#include <linux/slab.h>
+#include <linux/string_choices.h>
+
+#define PPU_PWPR    0x0
+#define PPU_PWSR    0x8
+#define PPU_DCDR0   0x170
+#define PPU_DCDR1   0x174
+
+/* shared definition for PPU_PWPR and PPU_PWSR */
+#define PPU_PWR_STATUS	GENMASK(3, 0)
+#define PPU_POWER_MODE_ON	0x8
+#define PPU_POWER_MODE_OFF	0x0
+
+#define PPU_REG_SIZE	0x1000
+
+struct sunxi_pck600_desc {
+	const char * const *pd_names;
+	unsigned int num_domains;
+	u32 logic_power_switch0_delay_offset;
+	u32 logic_power_switch1_delay_offset;
+	u32 off2on_delay_offset;
+	u32 device_ctrl0_delay;
+	u32 device_ctrl1_delay;
+	u32 logic_power_switch0_delay;
+	u32 logic_power_switch1_delay;
+	u32 off2on_delay;
+};
+
+struct sunxi_pck600_pd {
+	struct generic_pm_domain genpd;
+	struct sunxi_pck600 *pck;
+	void __iomem *base;
+};
+
+struct sunxi_pck600 {
+	struct device *dev;
+	struct genpd_onecell_data genpd_data;
+	struct sunxi_pck600_pd pds[];
+};
+
+#define to_sunxi_pd(gpd) container_of(gpd, struct sunxi_pck600_pd, genpd)
+
+static int sunxi_pck600_pd_set_power(struct sunxi_pck600_pd *pd, bool on)
+{
+	struct sunxi_pck600 *pck = pd->pck;
+	struct generic_pm_domain *genpd = &pd->genpd;
+	int ret;
+	u32 val, reg;
+
+	val = on ? PPU_POWER_MODE_ON : PPU_POWER_MODE_OFF;
+
+	reg = readl(pd->base + PPU_PWPR);
+	FIELD_MODIFY(PPU_PWR_STATUS, &reg, val);
+	writel(reg, pd->base + PPU_PWPR);
+
+	/* push write out to hardware */
+	reg = readl(pd->base + PPU_PWPR);
+
+	ret = readl_poll_timeout_atomic(pd->base + PPU_PWSR, reg,
+					FIELD_GET(PPU_PWR_STATUS, reg) == val,
+					0, 10000);
+	if (ret)
+		dev_err(pck->dev, "failed to turn domain \"%s\" %s: %d\n",
+			genpd->name, str_on_off(on), ret);
+
+	return ret;
+}
+
+static int sunxi_pck600_power_on(struct generic_pm_domain *domain)
+{
+	struct sunxi_pck600_pd *pd = to_sunxi_pd(domain);
+
+	return sunxi_pck600_pd_set_power(pd, true);
+}
+
+static int sunxi_pck600_power_off(struct generic_pm_domain *domain)
+{
+	struct sunxi_pck600_pd *pd = to_sunxi_pd(domain);
+
+	return sunxi_pck600_pd_set_power(pd, false);
+}
+
+static void sunxi_pck600_pd_setup(struct sunxi_pck600_pd *pd,
+				  const struct sunxi_pck600_desc *desc)
+{
+	writel(desc->device_ctrl0_delay, pd->base + PPU_DCDR0);
+	writel(desc->device_ctrl1_delay, pd->base + PPU_DCDR1);
+	writel(desc->logic_power_switch0_delay,
+	       pd->base + desc->logic_power_switch0_delay_offset);
+	writel(desc->logic_power_switch1_delay,
+	       pd->base + desc->logic_power_switch1_delay_offset);
+	writel(desc->off2on_delay, pd->base + desc->off2on_delay_offset);
+}
+
+static int sunxi_pck600_probe(struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+	const struct sunxi_pck600_desc *desc;
+	struct genpd_onecell_data *genpds;
+	struct sunxi_pck600 *pck;
+	struct reset_control *rst;
+	struct clk *clk;
+	void __iomem *base;
+	int i, ret;
+
+	desc = of_device_get_match_data(dev);
+
+	pck = devm_kzalloc(dev, struct_size(pck, pds, desc->num_domains), GFP_KERNEL);
+	if (!pck)
+		return -ENOMEM;
+
+	pck->dev = &pdev->dev;
+	platform_set_drvdata(pdev, pck);
+
+	genpds = &pck->genpd_data;
+	genpds->num_domains = desc->num_domains;
+	genpds->domains = devm_kcalloc(dev, desc->num_domains,
+				       sizeof(*genpds->domains), GFP_KERNEL);
+	if (!genpds->domains)
+		return -ENOMEM;
+
+	base = devm_platform_ioremap_resource(pdev, 0);
+	if (IS_ERR(base))
+		return PTR_ERR(base);
+
+	rst = devm_reset_control_get_exclusive_released(dev, NULL);
+	if (IS_ERR(rst))
+		return dev_err_probe(dev, PTR_ERR(rst), "failed to get reset control\n");
+
+	clk = devm_clk_get_enabled(dev, NULL);
+	if (IS_ERR(clk))
+		return dev_err_probe(dev, PTR_ERR(clk), "failed to get clock\n");
+
+	for (i = 0; i < desc->num_domains; i++) {
+		struct sunxi_pck600_pd *pd = &pck->pds[i];
+
+		pd->genpd.name = desc->pd_names[i];
+		pd->genpd.power_off = sunxi_pck600_power_off;
+		pd->genpd.power_on = sunxi_pck600_power_on;
+		pd->base = base + PPU_REG_SIZE * i;
+
+		sunxi_pck600_pd_setup(pd, desc);
+		ret = pm_genpd_init(&pd->genpd, NULL, false);
+		if (ret) {
+			dev_err_probe(dev, ret, "failed to initialize power domain\n");
+			goto err_remove_pds;
+		}
+
+		genpds->domains[i] = &pd->genpd;
+	}
+
+	ret = of_genpd_add_provider_onecell(dev_of_node(dev), genpds);
+	if (ret) {
+		dev_err_probe(dev, ret, "failed to add PD provider\n");
+		goto err_remove_pds;
+	}
+
+	return 0;
+
+err_remove_pds:
+	for (i--; i >= 0; i--)
+		pm_genpd_remove(genpds->domains[i]);
+
+	return ret;
+}
+
+static const char * const sun55i_a523_pck600_pd_names[] = {
+	"VE", "GPU", "VI", "VO0", "VO1", "DE", "NAND", "PCIE"
+};
+
+static const struct sunxi_pck600_desc sun55i_a523_pck600_desc = {
+	.pd_names = sun55i_a523_pck600_pd_names,
+	.num_domains = ARRAY_SIZE(sun55i_a523_pck600_pd_names),
+	.logic_power_switch0_delay_offset = 0xc00,
+	.logic_power_switch1_delay_offset = 0xc04,
+	.off2on_delay_offset = 0xc10,
+	.device_ctrl0_delay = 0xffffff,
+	.device_ctrl1_delay = 0xffff,
+	.logic_power_switch0_delay = 0x8080808,
+	.logic_power_switch1_delay = 0x808,
+	.off2on_delay = 0x8
+};
+
+static const struct of_device_id sunxi_pck600_of_match[] = {
+	{
+		.compatible	= "allwinner,sun55i-a523-pck-600",
+		.data		= &sun55i_a523_pck600_desc,
+	},
+	{}
+};
+MODULE_DEVICE_TABLE(of, sunxi_pck600_of_match);
+
+static struct platform_driver sunxi_pck600_driver = {
+	.probe = sunxi_pck600_probe,
+	.driver = {
+		.name   = "sunxi-pck-600",
+		.of_match_table = sunxi_pck600_of_match,
+		/* Power domains cannot be removed if in use. */
+		.suppress_bind_attrs = true,
+	},
+};
+module_platform_driver(sunxi_pck600_driver);
+
+MODULE_DESCRIPTION("Allwinner PCK-600 power domain driver");
+MODULE_AUTHOR("Chen-Yu Tsai <[e-mail]>");
+MODULE_LICENSE("GPL");

drivers/pmdomain/thead/Kconfig

···
 	tristate "Support TH1520 Power Domains"
 	depends on TH1520_AON_PROTOCOL
 	select REGMAP_MMIO
+	select AUXILIARY_BUS
 	help
 	  This driver enables power domain management for the T-HEAD
 	  TH-1520 SoC. On this SoC there are number of power domains,

drivers/pmdomain/thead/th1520-pm-domains.c

···
  * Author: Michal Wilczynski <[e-mail]>
  */
 
+#include <linux/auxiliary_bus.h>
 #include <linux/firmware/thead/thead,th1520-aon.h>
 #include <linux/slab.h>
 #include <linux/platform_device.h>
···
 	}
 }
 
+static void th1520_pd_pwrseq_unregister_adev(void *adev)
+{
+	auxiliary_device_delete(adev);
+	auxiliary_device_uninit(adev);
+}
+
+static int th1520_pd_pwrseq_gpu_init(struct device *dev)
+{
+	struct auxiliary_device *adev;
+	int ret;
+
+	/*
+	 * Correctly check only for the property's existence in the DT node.
+	 * We don't need to get/claim the reset here; that is the job of
+	 * the auxiliary driver that we are about to spawn.
+	 */
+	if (device_property_match_string(dev, "reset-names", "gpu-clkgen") < 0)
+		/*
+		 * This is not an error. It simply means the optional sequencer
+		 * is not described in the device tree.
+		 */
+		return 0;
+
+	adev = devm_kzalloc(dev, sizeof(*adev), GFP_KERNEL);
+	if (!adev)
+		return -ENOMEM;
+
+	adev->name = "pwrseq-gpu";
+	adev->dev.parent = dev;
+
+	ret = auxiliary_device_init(adev);
+	if (ret)
+		return ret;
+
+	ret = auxiliary_device_add(adev);
+	if (ret) {
+		auxiliary_device_uninit(adev);
+		return ret;
+	}
+
+	return devm_add_action_or_reset(dev, th1520_pd_pwrseq_unregister_adev,
+					adev);
+}
+
 static int th1520_pd_probe(struct platform_device *pdev)
 {
 	struct generic_pm_domain **domains;
···
 	if (ret)
 		goto err_clean_genpd;
 
+	ret = th1520_pd_pwrseq_gpu_init(dev);
+	if (ret)
+		goto err_clean_provider;
+
 	return 0;
 
+err_clean_provider:
+	of_genpd_del_provider(dev->of_node);
 err_clean_genpd:
 	for (i--; i >= 0; i--)
 		pm_genpd_remove(domains[i]);

drivers/pmdomain/ti/Kconfig

···
 config TI_SCI_PM_DOMAINS
 	tristate "TI SCI PM Domains Driver"
 	depends on TI_SCI_PROTOCOL
-	depends on PM_GENERIC_DOMAINS
+	select PM_GENERIC_DOMAINS if PM
 	help
 	  Generic power domain implementation for TI device implementing
 	  the TI SCI protocol.

drivers/pmdomain/xilinx/zynqmp-pm-domains.c

···
 				 struct device *dev)
 {
 	struct zynqmp_pm_domain *pd = to_zynqmp_pm_domain(domain);
-	struct device_link *link;
 	int ret;
-
-	link = device_link_add(dev, &domain->dev, DL_FLAG_SYNC_STATE_ONLY);
-	if (!link)
-		dev_dbg(&domain->dev, "failed to create device link for %s\n",
-			dev_name(dev));
 
 	/* If this is not the first device to attach there is nothing to do */
 	if (domain->device_count)
···
 	of_genpd_del_provider(pdev->dev.parent->of_node);
 }
 
-static void zynqmp_gpd_sync_state(struct device *dev)
-{
-	int ret;
-
-	ret = zynqmp_pm_init_finalize();
-	if (ret)
-		dev_warn(dev, "failed to release power management to firmware\n");
-}
-
 static struct platform_driver zynqmp_power_domain_driver = {
 	.driver	= {
 		.name = "zynqmp_power_controller",
-		.sync_state = zynqmp_gpd_sync_state,
 	},
 	.probe = zynqmp_gpd_probe,
 	.remove = zynqmp_gpd_remove,

drivers/remoteproc/imx_rproc.c

···
 #include <linux/of_reserved_mem.h>
 #include <linux/platform_device.h>
 #include <linux/pm_domain.h>
+#include <linux/pm_runtime.h>
 #include <linux/reboot.h>
 #include <linux/regmap.h>
 #include <linux/remoteproc.h>
···
 static int imx_rproc_attach_pd(struct imx_rproc *priv)
 {
 	struct device *dev = priv->dev;
-	int ret;
-	struct dev_pm_domain_attach_data pd_data = {
-		.pd_flags = PD_FLAG_DEV_LINK_ON,
-	};
+	int ret, i;
+	bool detached = true;
 
 	/*
 	 * If there is only one power-domain entry, the platform driver framework
···
 	if (dev->pm_domain)
 		return 0;
 
-	ret = dev_pm_domain_attach_list(dev, &pd_data, &priv->pd_list);
-	return ret < 0 ? ret : 0;
+	ret = dev_pm_domain_attach_list(dev, NULL, &priv->pd_list);
+	if (ret < 0)
+		return ret;
+	/*
+	 * If all the power domain devices are already turned on, the remote
+	 * core is already powered up and running when the kernel booted (e.g.,
+	 * started by U-Boot's bootaux command). In this case attach to it.
+	 */
+	for (i = 0; i < ret; i++) {
+		if (!dev_pm_genpd_is_on(priv->pd_list->pd_devs[i])) {
+			detached = false;
+			break;
+		}
+	}
+
+	if (detached)
+		priv->rproc->state = RPROC_DETACHED;
+
+	return 0;
 }
 
 static int imx_rproc_detect_mode(struct imx_rproc *priv)
···
 	struct device *dev = priv->dev;
 	int ret;
 
-	/* Remote core is not under control of Linux */
-	if (dcfg->method == IMX_RPROC_NONE)
+	/* Remote core is not under control of Linux or it is managed by SCU API */
+	if (dcfg->method == IMX_RPROC_NONE || dcfg->method == IMX_RPROC_SCU_API)
 		return 0;
 
 	priv->clk = devm_clk_get(dev, NULL);
···
 		}
 	}
 
+	if (dcfg->method == IMX_RPROC_SCU_API) {
+		pm_runtime_enable(dev);
+		ret = pm_runtime_resume_and_get(dev);
+		if (ret) {
+			dev_err(dev, "pm_runtime get failed: %d\n", ret);
+			goto err_put_clk;
+		}
+	}
+
 	ret = rproc_add(rproc);
 	if (ret) {
 		dev_err(dev, "rproc_add failed\n");
···
 	struct rproc *rproc = platform_get_drvdata(pdev);
 	struct imx_rproc *priv = rproc->priv;
 
+	if (priv->dcfg->method == IMX_RPROC_SCU_API) {
+		pm_runtime_disable(priv->dev);
+		pm_runtime_put(priv->dev);
+	}
 	clk_disable_unprepare(priv->clk);
 	rproc_del(rproc);
 	imx_rproc_put_scu(rproc);

drivers/soc/tegra/pmc.c

···
  * @irq: chip implementation for the IRQ domain
  * @clk_nb: pclk clock changes handler
  * @core_domain_state_synced: flag marking the core domain's state as synced
- * @core_domain_registered: flag marking the core domain as registered
  * @wake_type_level_map: Bitmap indicating level type for non-dual edge wakes
  * @wake_type_dual_edge_map: Bitmap indicating if a wake is dual-edge or not
  * @wake_sw_status_map: Bitmap to hold raw status of wakes without mask
···
 	struct notifier_block clk_nb;
 
 	bool core_domain_state_synced;
-	bool core_domain_registered;
 
 	unsigned long *wake_type_level_map;
 	unsigned long *wake_type_dual_edge_map;
···
 
 	pg->id = id;
 	pg->genpd.name = np->name;
+	pg->genpd.flags = GENPD_FLAG_NO_SYNC_STATE;
 	pg->genpd.power_off = tegra_genpd_power_off;
 	pg->genpd.power_on = tegra_genpd_power_on;
 	pg->pmc = pmc;
···
 		return -ENOMEM;
 
 	genpd->name = "core";
+	genpd->flags = GENPD_FLAG_NO_SYNC_STATE;
 	genpd->set_performance_state = tegra_pmc_core_pd_set_performance_state;
 
 	err = devm_pm_opp_set_regulators(pmc->dev, rname);
···
 		dev_err(pmc->dev, "failed to add core genpd: %d\n", err);
 		goto remove_genpd;
 	}
-
-	pmc->core_domain_registered = true;
 
 	return 0;
 
···
 
 static void tegra_pmc_sync_state(struct device *dev)
 {
+	struct device_node *np, *child;
 	int err;
+
+	np = of_get_child_by_name(dev->of_node, "powergates");
+	if (!np)
+		return;
+
+	for_each_child_of_node(np, child)
+		of_genpd_sync_state(child);
+
+	of_node_put(np);
+
+	np = of_get_child_by_name(dev->of_node, "core-domain");
+	if (!np)
+		return;
+
+	of_genpd_sync_state(np);
+	of_node_put(np);
 
 	/*
 	 * Newer device-trees have power domains, but we need to prepare all
···
 	 * no dependencies that will block the state syncing. We shouldn't
 	 * mark the domain as synced in this case.
 	 */
-	if (!pmc->core_domain_registered)
-		return;
-
 	pmc->core_domain_state_synced = true;
 
 	/* this is a no-op if core regulator isn't used */

include/linux/device.h

···
 	return false;
 }
 
+static inline int dev_set_drv_sync_state(struct device *dev,
+					 void (*fn)(struct device *dev))
+{
+	if (!dev || !dev->driver)
+		return 0;
+	if (dev->driver->sync_state && dev->driver->sync_state != fn)
+		return -EBUSY;
+	if (!dev->driver->sync_state)
+		dev->driver->sync_state = fn;
+	return 0;
+}
+
 static inline void dev_set_removable(struct device *dev,
 				     enum device_removable removable)
 {
···
 int device_add_of_node(struct device *dev, struct device_node *of_node);
 void device_remove_of_node(struct device *dev);
 void device_set_of_node_from_dev(struct device *dev, const struct device *dev2);
+struct device *get_dev_from_fwnode(struct fwnode_handle *fwnode);
 
 static inline struct device_node *dev_of_node(struct device *dev)
 {

include/linux/firmware/xlnx-zynqmp.h

···
 int zynqmp_pm_reset_get_status(const u32 reset, u32 *status);
 unsigned int zynqmp_pm_bootmode_read(u32 *ps_mode);
 int zynqmp_pm_bootmode_write(u32 ps_mode);
-int zynqmp_pm_init_finalize(void);
 int zynqmp_pm_set_suspend_mode(u32 mode);
 int zynqmp_pm_request_node(const u32 node, const u32 capabilities,
 			   const u32 qos, const enum zynqmp_pm_request_ack ack);
···
 }
 
 static inline int zynqmp_pm_bootmode_write(u32 ps_mode)
-{
-	return -ENODEV;
-}
-
-static inline int zynqmp_pm_init_finalize(void)
 {
 	return -ENODEV;
 }

include/linux/pm_domain.h

···
  * GENPD_FLAG_DEV_NAME_FW:	Instructs genpd to generate an unique device name
  *				using ida. It is used by genpd providers which
  *				get their genpd-names directly from FW.
+ *
+ * GENPD_FLAG_NO_SYNC_STATE:	The ->sync_state() support is implemented in a
+ *				genpd provider specific way, likely through a
+ *				parent device node. This flag makes genpd to
+ *				skip its internal support for this.
  */
 #define GENPD_FLAG_PM_CLK	 (1U << 0)
 #define GENPD_FLAG_IRQ_SAFE	 (1U << 1)
···
 #define GENPD_FLAG_MIN_RESIDENCY (1U << 6)
 #define GENPD_FLAG_OPP_TABLE_FW	 (1U << 7)
 #define GENPD_FLAG_DEV_NAME_FW	 (1U << 8)
+#define GENPD_FLAG_NO_SYNC_STATE (1U << 9)
 
 enum gpd_status {
 	GENPD_STATE_ON = 0,	/* PM domain is on */
···
 	GENPD_NOTIFY_OFF,
 	GENPD_NOTIFY_PRE_ON,
 	GENPD_NOTIFY_ON,
+};
+
+enum genpd_sync_state {
+	GENPD_SYNC_STATE_OFF = 0,
+	GENPD_SYNC_STATE_SIMPLE,
+	GENPD_SYNC_STATE_ONECELL,
 };
 
 struct dev_power_governor {
···
 	unsigned int performance_state;	/* Aggregated max performance state */
 	cpumask_var_t cpus;		/* A cpumask of the attached CPUs */
 	bool synced_poweroff;		/* A consumer needs a synced poweroff */
+	bool stay_on;			/* Stay powered-on during boot. */
+	enum genpd_sync_state sync_state; /* How sync_state is managed. */
 	int (*power_off)(struct generic_pm_domain *domain);
 	int (*power_on)(struct generic_pm_domain *domain);
 	struct raw_notifier_head power_notifiers; /* Power on/off notifiers */
···
 int dev_pm_genpd_set_hwmode(struct device *dev, bool enable);
 bool dev_pm_genpd_get_hwmode(struct device *dev);
 int dev_pm_genpd_rpm_always_on(struct device *dev, bool on);
+bool dev_pm_genpd_is_on(struct device *dev);
 
 extern struct dev_power_governor simple_qos_governor;
 extern struct dev_power_governor pm_domain_always_on_gov;
···
 	return -EOPNOTSUPP;
 }
 
+static inline bool dev_pm_genpd_is_on(struct device *dev)
+{
+	return false;
+}
+
 #define simple_qos_governor		(*(struct dev_power_governor *)(NULL))
 #define pm_domain_always_on_gov		(*(struct dev_power_governor *)(NULL))
 #endif
···
 struct generic_pm_domain *of_genpd_remove_last(struct device_node *np);
 int of_genpd_parse_idle_states(struct device_node *dn,
 			       struct genpd_power_state **states, int *n);
+void of_genpd_sync_state(struct device_node *np);
 
 int genpd_dev_pm_attach(struct device *dev);
 struct device *genpd_dev_pm_attach_by_id(struct device *dev,
···
 {
 	return -ENODEV;
 }
+
+static inline void of_genpd_sync_state(struct device_node *np) {}
 
 static inline int genpd_dev_pm_attach(struct device *dev)
 {