1 // SPDX-License-Identifier: GPL-2.0-only
9 #include <linux/io.h>
23  * These device power state values are not well-defined in the specification.
44 	ret = pd->ops->device_set_power_state(pd->domain, state);  in scpi_pd_power()
48 	return !(state == pd->ops->device_get_power_state(pd->domain));  in scpi_pd_power()
67 	struct device *dev = &pdev->dev;  in scpi_pm_domain_probe()
68 	struct device_node *np = dev->of_node;  in scpi_pm_domain_probe()
71 	struct generic_pm_domain **domains;  in scpi_pm_domain_probe()  local
77 		return -EPROBE_DEFER;  in scpi_pm_domain_probe()
81 		return -ENODEV;  in scpi_pm_domain_probe()
84 	if (!scpi_ops->device_set_power_state ||  in scpi_pm_domain_probe()
85 	    !scpi_ops->device_get_power_state) {  in scpi_pm_domain_probe()
86 		dev_err(dev, "power domains not supported in the firmware\n");  in scpi_pm_domain_probe()
87 		return -ENODEV;  in scpi_pm_domain_probe()
90 	ret = of_property_read_u32(np, "num-domains", &num_domains);  in scpi_pm_domain_probe()
92 		dev_err(dev, "number of domains not found\n");  in scpi_pm_domain_probe()
93 		return -EINVAL;  in scpi_pm_domain_probe()
98 		return -ENOMEM;  in scpi_pm_domain_probe()
102 		return -ENOMEM;  in scpi_pm_domain_probe()
104 	domains = devm_kcalloc(dev, num_domains, sizeof(*domains), GFP_KERNEL);  in scpi_pm_domain_probe()
105 	if (!domains)  in scpi_pm_domain_probe()
106 		return -ENOMEM;  in scpi_pm_domain_probe()
109 		domains[i] = &scpi_pd->genpd;  in scpi_pm_domain_probe()
111 		scpi_pd->domain = i;  in scpi_pm_domain_probe()
112 		scpi_pd->ops = scpi_ops;  in scpi_pm_domain_probe()
113 		scpi_pd->genpd.name = devm_kasprintf(dev, GFP_KERNEL,  in scpi_pm_domain_probe()
115 		if (!scpi_pd->genpd.name) {  in scpi_pm_domain_probe()
120 		scpi_pd->genpd.power_off = scpi_pd_power_off;  in scpi_pm_domain_probe()
121 		scpi_pd->genpd.power_on = scpi_pd_power_on;  in scpi_pm_domain_probe()
124 		 * Treat all power domains as off at boot.  in scpi_pm_domain_probe()
126 		 * The SCP firmware itself may have switched on some domains,  in scpi_pm_domain_probe()
129 		pm_genpd_init(&scpi_pd->genpd, NULL, true);  in scpi_pm_domain_probe()
132 	scpi_pd_data->domains = domains;  in scpi_pm_domain_probe()
133 	scpi_pd_data->num_domains = num_domains;  in scpi_pm_domain_probe()
141 	{ .compatible = "arm,scpi-power-domains", },