1 // SPDX-License-Identifier: GPL-2.0
3  * PM domains for CPUs via genpd - managed by cpuidle-psci.
22 #include "cpuidle-psci.h"
27 	struct device_node *node;  member
33 static int psci_pd_power_off(struct generic_pm_domain *pd)  in psci_pd_power_off()  argument
35 	struct genpd_power_state *state = &pd->states[pd->state_idx];  in psci_pd_power_off()
38 	if (!state->data)  in psci_pd_power_off()
42 		return -EBUSY;  in psci_pd_power_off()
45 	pd_state = state->data;  in psci_pd_power_off()
53 	struct generic_pm_domain *pd;  in psci_pd_init()  local
56 	int ret = -ENOMEM;  in psci_pd_init()
58 	pd = dt_idle_pd_alloc(np, psci_dt_parse_state_node);  in psci_pd_init()
59 	if (!pd)  in psci_pd_init()
66 	pd->flags |= GENPD_FLAG_IRQ_SAFE | GENPD_FLAG_CPU_DOMAIN;  in psci_pd_init()
71 	 * supported, but only during system-wide suspend.  in psci_pd_init()
74 		pd->power_off = psci_pd_power_off;  in psci_pd_init()
75 		pd->flags |= GENPD_FLAG_ACTIVE_WAKEUP;  in psci_pd_init()
77 			pd->flags |= GENPD_FLAG_RPM_ALWAYS_ON;  in psci_pd_init()
79 		pd->flags |= GENPD_FLAG_ALWAYS_ON;  in psci_pd_init()
83 	pd_gov = pd->states ? &pm_domain_cpu_gov : NULL;  in psci_pd_init()
85 	ret = pm_genpd_init(pd, pd_gov, false);  in psci_pd_init()
89 	ret = of_genpd_add_provider_simple(np, pd);  in psci_pd_init()
93 	pd_provider->node = of_node_get(np);  in psci_pd_init()
94 	list_add(&pd_provider->link, &psci_pd_providers);  in psci_pd_init()
96 	pr_debug("init PM domain %s\n", pd->name);  in psci_pd_init()
100 	pm_genpd_remove(pd);  in psci_pd_init()
104 	dt_idle_pd_free(pd);  in psci_pd_init()
117 		of_genpd_del_provider(pd_provider->node);  in psci_pd_remove()
119 		genpd = of_genpd_remove_last(pd_provider->node);  in psci_pd_remove()
123 		of_node_put(pd_provider->node);  in psci_pd_remove()
124 		list_del(&pd_provider->link);  in psci_pd_remove()
139 	{ .compatible = "arm,psci-1.0" },
145 	struct device_node *np = pdev->dev.of_node;  in psci_cpuidle_domain_probe()
150 		return -ENODEV;  in psci_cpuidle_domain_probe()
153 	 * Parse child nodes for the "#power-domain-cells" property and  in psci_cpuidle_domain_probe()
154 	 * initialize a genpd/genpd-of-provider pair when it's found.  in psci_cpuidle_domain_probe()
156 	for_each_child_of_node_scoped(np, node) {  in psci_cpuidle_domain_probe()
157 		if (!of_property_present(node, "#power-domain-cells"))  in psci_cpuidle_domain_probe()
160 		ret = psci_pd_init(node, use_osi);  in psci_cpuidle_domain_probe()
196 		.name = "psci-cpuidle-domain",