1 // SPDX-License-Identifier: GPL-2.0-or-later
12 #include <linux/reboot-mode.h>
14 #define PREFIX "mode-"
17 	const char *mode;  member
25 	const char *normal = "normal";  in get_reboot_mode_magic()  local
30 		cmd = normal;  in get_reboot_mode_magic()
32 	list_for_each_entry(info, &reboot->head, list) {  in get_reboot_mode_magic()
33 		if (!strcmp(info->mode, cmd)) {  in get_reboot_mode_magic()
34 			magic = info->magic;  in get_reboot_mode_magic()
43 			      unsigned long mode, void *cmd)  in reboot_mode_notify()  argument
51 		reboot->write(reboot, magic);  in reboot_mode_notify()
57  * reboot_mode_register - register a reboot mode driver
58  * @reboot: reboot mode driver
66 	struct device_node *np = reboot->dev->of_node;  in reboot_mode_register()
70 	INIT_LIST_HEAD(&reboot->head);  in reboot_mode_register()
73 		if (strncmp(prop->name, PREFIX, len))  in reboot_mode_register()
76 		info = devm_kzalloc(reboot->dev, sizeof(*info), GFP_KERNEL);  in reboot_mode_register()
78 			ret = -ENOMEM;  in reboot_mode_register()
82 		if (of_property_read_u32(np, prop->name, &info->magic)) {  in reboot_mode_register()
83 			dev_err(reboot->dev, "reboot mode %s without magic number\n",  in reboot_mode_register()
84 				info->mode);  in reboot_mode_register()
85 			devm_kfree(reboot->dev, info);  in reboot_mode_register()
89 		info->mode = kstrdup_const(prop->name + len, GFP_KERNEL);  in reboot_mode_register()
90 		if (!info->mode) {  in reboot_mode_register()
91 			ret =  -ENOMEM;  in reboot_mode_register()
93 		} else if (info->mode[0] == '\0') {  in reboot_mode_register()
94 			kfree_const(info->mode);  in reboot_mode_register()
95 			ret = -EINVAL;  in reboot_mode_register()
96 			dev_err(reboot->dev, "invalid mode name(%s): too short!\n",  in reboot_mode_register()
97 				prop->name);  in reboot_mode_register()
101 		list_add_tail(&info->list, &reboot->head);  in reboot_mode_register()
104 	reboot->reboot_notifier.notifier_call = reboot_mode_notify;  in reboot_mode_register()
105 	register_reboot_notifier(&reboot->reboot_notifier);  in reboot_mode_register()
110 	list_for_each_entry(info, &reboot->head, list)  in reboot_mode_register()
111 		kfree_const(info->mode);  in reboot_mode_register()
118  * reboot_mode_unregister - unregister a reboot mode driver
119  * @reboot: reboot mode driver
125 	unregister_reboot_notifier(&reboot->reboot_notifier);  in reboot_mode_unregister()
127 	list_for_each_entry(info, &reboot->head, list)  in reboot_mode_unregister()
128 		kfree_const(info->mode);  in reboot_mode_unregister()
140  * devm_reboot_mode_register() - resource managed reboot_mode_register()
142  * @reboot: reboot mode driver
154 		return -ENOMEM;  in devm_reboot_mode_register()
180  * devm_reboot_mode_unregister() - resource managed reboot_mode_unregister()
182  * @reboot: reboot mode driver
193 MODULE_AUTHOR("Andy Yan <andy.yan@rock-chips.com>");
194 MODULE_DESCRIPTION("System reboot mode core library");