1 // SPDX-License-Identifier: GPL-2.0
3  * ZynqMP Generic PM domain support
5  *  Copyright (C) 2015-2019 Xilinx, Inc.
20 #include <linux/firmware/xlnx-zynqmp.h>
29  * struct zynqmp_pm_domain - Wrapper around struct generic_pm_domain
32  * @flags:		ZynqMP PM domain flags
41  * zynqmp_gpd_is_active_wakeup_path() - Check if device is in wakeup source
64  * zynqmp_gpd_power_on() - Power on PM domain
78 	ret = zynqmp_pm_set_requirement(pd->node_id,  in zynqmp_gpd_power_on()
84 		       __func__, domain->name, pd->node_id, ret);  in zynqmp_gpd_power_on()
88 	pr_debug("%s() Powered on %s domain\n", __func__, domain->name);  in zynqmp_gpd_power_on()
93  * zynqmp_gpd_power_off() - Power off PM domain
112 	if (!(pd->flags & ZYNQMP_PM_DOMAIN_REQUESTED)) {  in zynqmp_gpd_power_off()
114 			 __func__, domain->name);  in zynqmp_gpd_power_off()
118 	list_for_each_entry_safe(pdd, tmp, &domain->dev_list, list_node) {  in zynqmp_gpd_power_off()
120 		may_wakeup = zynqmp_gpd_is_active_wakeup_path(pdd->dev, NULL);  in zynqmp_gpd_power_off()
122 			dev_dbg(pdd->dev, "device is in wakeup path in %s\n",  in zynqmp_gpd_power_off()
123 				domain->name);  in zynqmp_gpd_power_off()
129 	ret = zynqmp_pm_set_requirement(pd->node_id, capabilities, 0,  in zynqmp_gpd_power_off()
137 		       __func__, domain->name, pd->node_id, ret);  in zynqmp_gpd_power_off()
141 	pr_debug("%s() Powered off %s domain\n", __func__, domain->name);  in zynqmp_gpd_power_off()
146  * zynqmp_gpd_attach_dev() - Attach device to the PM domain
161 	if (domain->device_count)  in zynqmp_gpd_attach_dev()
164 	ret = zynqmp_pm_request_node(pd->node_id, 0, 0,  in zynqmp_gpd_attach_dev()
169 		       __func__, domain->name, pd->node_id, ret);  in zynqmp_gpd_attach_dev()
173 	pd->flags |= ZYNQMP_PM_DOMAIN_REQUESTED;  in zynqmp_gpd_attach_dev()
176 		 dev_name(dev), domain->name);  in zynqmp_gpd_attach_dev()
181  * zynqmp_gpd_detach_dev() - Detach device from the PM domain
194 	if (domain->device_count)  in zynqmp_gpd_detach_dev()
197 	ret = zynqmp_pm_release_node(pd->node_id);  in zynqmp_gpd_detach_dev()
201 		       __func__, domain->name, pd->node_id, ret);  in zynqmp_gpd_detach_dev()
205 	pd->flags &= ~ZYNQMP_PM_DOMAIN_REQUESTED;  in zynqmp_gpd_detach_dev()
208 		 dev_name(dev), domain->name);  in zynqmp_gpd_detach_dev()
215 	unsigned int i, idx = genpdspec->args[0];  in zynqmp_gpd_xlate()
218 	pd = container_of(genpd_data->domains[0], struct zynqmp_pm_domain, gpd);  in zynqmp_gpd_xlate()
220 	if (genpdspec->args_count != 1)  in zynqmp_gpd_xlate()
221 		return ERR_PTR(-EINVAL);  in zynqmp_gpd_xlate()
241 	if (!genpd_data->domains[i] || i == ZYNQMP_NUM_DOMAINS)  in zynqmp_gpd_xlate()
242 		return ERR_PTR(-ENOENT);  in zynqmp_gpd_xlate()
244 	return genpd_data->domains[i];  in zynqmp_gpd_xlate()
253 	struct device *dev = &pdev->dev;  in zynqmp_gpd_probe()
257 		return -ENOMEM;  in zynqmp_gpd_probe()
261 		return -ENOMEM;  in zynqmp_gpd_probe()
263 	zynqmp_pd_data->xlate = zynqmp_gpd_xlate;  in zynqmp_gpd_probe()
268 		return -ENOMEM;  in zynqmp_gpd_probe()
270 	if (!of_device_is_compatible(dev->parent->of_node,  in zynqmp_gpd_probe()
271 				     "xlnx,zynqmp-firmware"))  in zynqmp_gpd_probe()
275 		pd->node_id = 0;  in zynqmp_gpd_probe()
276 		pd->gpd.name = kasprintf(GFP_KERNEL, "domain%d", i);  in zynqmp_gpd_probe()
277 		pd->gpd.power_off = zynqmp_gpd_power_off;  in zynqmp_gpd_probe()
278 		pd->gpd.power_on = zynqmp_gpd_power_on;  in zynqmp_gpd_probe()
279 		pd->gpd.attach_dev = zynqmp_gpd_attach_dev;  in zynqmp_gpd_probe()
280 		pd->gpd.detach_dev = zynqmp_gpd_detach_dev;  in zynqmp_gpd_probe()
282 		domains[i] = &pd->gpd;  in zynqmp_gpd_probe()
285 		pm_genpd_init(&pd->gpd, NULL, true);  in zynqmp_gpd_probe()
288 	zynqmp_pd_data->domains = domains;  in zynqmp_gpd_probe()
289 	zynqmp_pd_data->num_domains = ZYNQMP_NUM_DOMAINS;  in zynqmp_gpd_probe()
290 	of_genpd_add_provider_onecell(dev->parent->of_node, zynqmp_pd_data);  in zynqmp_gpd_probe()
297 	of_genpd_del_provider(pdev->dev.parent->of_node);  in zynqmp_gpd_remove()