1 // SPDX-License-Identifier: GPL-2.0
5  *  Copyright (C) 2014-2019 Xilinx, Inc.
18 #include <linux/firmware/xlnx-zynqmp.h>
19 #include <linux/firmware/xlnx-event-manager.h>
20 #include <linux/mailbox/zynqmp-ipi-message.h>
23  * struct zynqmp_pm_work_struct - Wrapper for struct work_struct
46 	[PM_SUSPEND_MODE_POWER_OFF] = "power-off",
58 	/* First element is callback API ID, others are callback arguments */  in suspend_event_callback()
59 	if (work_pending(&zynqmp_pm_init_suspend_work->callback_work))  in suspend_event_callback()
63 	memcpy(zynqmp_pm_init_suspend_work->args, &payload[1],  in suspend_event_callback()
64 	       sizeof(zynqmp_pm_init_suspend_work->args));  in suspend_event_callback()
66 	queue_work(system_unbound_wq, &zynqmp_pm_init_suspend_work->callback_work);  in suspend_event_callback()
75 	/* First element is callback API ID, others are callback arguments */  in zynqmp_pm_isr()
99 	memcpy(payload, msg->data, sizeof(msg->len));  in ipi_receive_callback()
100 	/* First element is callback API ID, others are callback arguments */  in ipi_receive_callback()
102 		if (work_pending(&zynqmp_pm_init_suspend_work->callback_work))  in ipi_receive_callback()
106 		memcpy(zynqmp_pm_init_suspend_work->args, &payload[1],  in ipi_receive_callback()
107 		       sizeof(zynqmp_pm_init_suspend_work->args));  in ipi_receive_callback()
110 			   &zynqmp_pm_init_suspend_work->callback_work);  in ipi_receive_callback()
120  * zynqmp_pm_init_suspend_work_fn - Initialize suspend
123  * Bottom-half of PM callback IRQ handler.
130 	if (pm_work->args[0] == SUSPEND_SYSTEM_SHUTDOWN) {  in zynqmp_pm_init_suspend_work_fn()
132 	} else if (pm_work->args[0] == SUSPEND_POWER_REQUEST) {  in zynqmp_pm_init_suspend_work_fn()
136 		       __func__, pm_work->args[0]);  in zynqmp_pm_init_suspend_work_fn()
156 		*(s - 1) = '\n';  in suspend_mode_show()
157 	return (s - buf);  in suspend_mode_show()
164 	int md, ret = -EINVAL;  in suspend_mode_store()
192 	/* Check PM API version number */  in zynqmp_pm_probe()
194 		return -ENODEV;  in zynqmp_pm_probe()
199 	 * If xlnx_register_event() returns -EACCES (Xilinx Event Manager  in zynqmp_pm_probe()
200 	 * is not available to use) or -ENODEV(Xilinx Event Manager not compiled),  in zynqmp_pm_probe()
201 	 * then use ipi-mailbox or interrupt method.  in zynqmp_pm_probe()
206 		zynqmp_pm_init_suspend_work = devm_kzalloc(&pdev->dev,  in zynqmp_pm_probe()
212 			return -ENOMEM;  in zynqmp_pm_probe()
216 		INIT_WORK(&zynqmp_pm_init_suspend_work->callback_work,  in zynqmp_pm_probe()
218 	} else if (ret != -EACCES && ret != -ENODEV) {  in zynqmp_pm_probe()
219 		dev_err(&pdev->dev, "Failed to Register with Xilinx Event manager %d\n", ret);  in zynqmp_pm_probe()
221 	} else if (of_find_property(pdev->dev.of_node, "mboxes", NULL)) {  in zynqmp_pm_probe()
223 			devm_kzalloc(&pdev->dev,  in zynqmp_pm_probe()
227 			return -ENOMEM;  in zynqmp_pm_probe()
229 		INIT_WORK(&zynqmp_pm_init_suspend_work->callback_work,  in zynqmp_pm_probe()
231 		client = devm_kzalloc(&pdev->dev, sizeof(*client), GFP_KERNEL);  in zynqmp_pm_probe()
233 			return -ENOMEM;  in zynqmp_pm_probe()
235 		client->dev = &pdev->dev;  in zynqmp_pm_probe()
236 		client->rx_callback = ipi_receive_callback;  in zynqmp_pm_probe()
240 			dev_err(&pdev->dev, "Failed to request rx channel\n");  in zynqmp_pm_probe()
243 	} else if (of_find_property(pdev->dev.of_node, "interrupts", NULL)) {  in zynqmp_pm_probe()
246 			return -ENXIO;  in zynqmp_pm_probe()
248 		ret = devm_request_threaded_irq(&pdev->dev, irq, NULL,  in zynqmp_pm_probe()
251 						dev_name(&pdev->dev),  in zynqmp_pm_probe()
252 						&pdev->dev);  in zynqmp_pm_probe()
254 			dev_err(&pdev->dev, "devm_request_threaded_irq '%d' "  in zynqmp_pm_probe()
259 		dev_err(&pdev->dev, "Required property not found in DT node\n");  in zynqmp_pm_probe()
260 		return -ENOENT;  in zynqmp_pm_probe()
263 	ret = sysfs_create_file(&pdev->dev.kobj, &dev_attr_suspend_mode.attr);  in zynqmp_pm_probe()
270 		dev_err(&pdev->dev, "unable to create sysfs interface\n");  in zynqmp_pm_probe()
279 	sysfs_remove_file(&pdev->dev.kobj, &dev_attr_suspend_mode.attr);  in zynqmp_pm_remove()
290 	{ .compatible = "xlnx,zynqmp-power", },