soc/ti/ti_sci_pm_domains.c

1 // SPDX-License-Identifier: GPL-2.0-only
3  * TI SCI Generic Power Domain Driver
5  * Copyright (C) 2015-2017 Texas Instruments Incorporated - http://www.ti.com/
6  *	J Keerthy <j-keerthy@ti.com>
7  *	Dave Gerlach <d-gerlach@ti.com>
17 #include <dt-bindings/soc/ti,sci_pm_domain.h>
20  * struct ti_sci_genpd_provider: holds common TI SCI genpd provider data
21  * @ti_sci: handle to TI SCI protocol driver that provides ops to
23  * @dev: pointer to dev for the driver for devm allocs
29 	struct device *dev;  member
42  * @parent: link to the parent TI SCI genpd provider
61 	const struct ti_sci_handle *ti_sci = pd->parent->ti_sci;  in ti_sci_pd_power_off()
63 	return ti_sci->ops.dev_ops.put_device(ti_sci, pd->idx);  in ti_sci_pd_power_off()
73 	const struct ti_sci_handle *ti_sci = pd->parent->ti_sci;  in ti_sci_pd_power_on()
75 	if (pd->exclusive)  in ti_sci_pd_power_on()
76 		return ti_sci->ops.dev_ops.get_device_exclusive(ti_sci,  in ti_sci_pd_power_on()
77 								pd->idx);  in ti_sci_pd_power_on()
79 		return ti_sci->ops.dev_ops.get_device(ti_sci, pd->idx);  in ti_sci_pd_power_on()
83  * ti_sci_pd_xlate(): translation service for TI SCI genpds
92 	unsigned int idx = genpdspec->args[0];  in ti_sci_pd_xlate()
94 	if (genpdspec->args_count != 1 && genpdspec->args_count != 2)  in ti_sci_pd_xlate()
95 		return ERR_PTR(-EINVAL);  in ti_sci_pd_xlate()
97 	if (idx >= genpd_data->num_domains) {  in ti_sci_pd_xlate()
99 		return ERR_PTR(-EINVAL);  in ti_sci_pd_xlate()
102 	if (!genpd_data->domains[idx])  in ti_sci_pd_xlate()
103 		return ERR_PTR(-ENOENT);  in ti_sci_pd_xlate()
105 	genpd_to_ti_sci_pd(genpd_data->domains[idx])->exclusive =  in ti_sci_pd_xlate()
106 		genpdspec->args[1];  in ti_sci_pd_xlate()
108 	return genpd_data->domains[idx];  in ti_sci_pd_xlate()
112 	{ .compatible = "ti,sci-pm-domain", },
119 	struct device *dev = &pdev->dev;  in ti_sci_pm_domain_probe()  local
128 	pd_provider = devm_kzalloc(dev, sizeof(*pd_provider), GFP_KERNEL);  in ti_sci_pm_domain_probe()
130 		return -ENOMEM;  in ti_sci_pm_domain_probe()
132 	pd_provider->ti_sci = devm_ti_sci_get_handle(dev);  in ti_sci_pm_domain_probe()
133 	if (IS_ERR(pd_provider->ti_sci))  in ti_sci_pm_domain_probe()
134 		return PTR_ERR(pd_provider->ti_sci);  in ti_sci_pm_domain_probe()
136 	pd_provider->dev = dev;  in ti_sci_pm_domain_probe()
138 	INIT_LIST_HEAD(&pd_provider->pd_list);  in ti_sci_pm_domain_probe()
140 	/* Find highest device ID used for power domains */  in ti_sci_pm_domain_probe()
142 		np = of_find_node_with_property(np, "power-domains");  in ti_sci_pm_domain_probe()
149 			ret = of_parse_phandle_with_args(np, "power-domains",  in ti_sci_pm_domain_probe()
150 							 "#power-domain-cells",  in ti_sci_pm_domain_probe()
155 			if (args.args_count >= 1 && args.np == dev->of_node) {  in ti_sci_pm_domain_probe()
159 				pd = devm_kzalloc(dev, sizeof(*pd), GFP_KERNEL);  in ti_sci_pm_domain_probe()
161 					return -ENOMEM;  in ti_sci_pm_domain_probe()
163 				pd->pd.name = devm_kasprintf(dev, GFP_KERNEL,  in ti_sci_pm_domain_probe()
166 				if (!pd->pd.name)  in ti_sci_pm_domain_probe()
167 					return -ENOMEM;  in ti_sci_pm_domain_probe()
169 				pd->pd.power_off = ti_sci_pd_power_off;  in ti_sci_pm_domain_probe()
170 				pd->pd.power_on = ti_sci_pd_power_on;  in ti_sci_pm_domain_probe()
171 				pd->idx = args.args[0];  in ti_sci_pm_domain_probe()
172 				pd->parent = pd_provider;  in ti_sci_pm_domain_probe()
174 				pm_genpd_init(&pd->pd, NULL, true);  in ti_sci_pm_domain_probe()
176 				list_add(&pd->node, &pd_provider->pd_list);  in ti_sci_pm_domain_probe()
182 	pd_provider->data.domains =  in ti_sci_pm_domain_probe()
183 		devm_kcalloc(dev, max_id + 1,  in ti_sci_pm_domain_probe()
184 			     sizeof(*pd_provider->data.domains),  in ti_sci_pm_domain_probe()
187 	pd_provider->data.num_domains = max_id + 1;  in ti_sci_pm_domain_probe()
188 	pd_provider->data.xlate = ti_sci_pd_xlate;  in ti_sci_pm_domain_probe()
190 	list_for_each_entry(pd, &pd_provider->pd_list, node)  in ti_sci_pm_domain_probe()
191 		pd_provider->data.domains[pd->idx] = &pd->pd;  in ti_sci_pm_domain_probe()
193 	return of_genpd_add_provider_onecell(dev->of_node, &pd_provider->data);  in ti_sci_pm_domain_probe()
205 MODULE_DESCRIPTION("TI System Control Interface (SCI) Power Domain driver");