1 // SPDX-License-Identifier: GPL-2.0-or-later
8 #define pr_fmt(fmt)     "opal-powercap: " fmt
22 	struct kobj_attribute attr;  member
30 static ssize_t powercap_show(struct kobject *kobj, struct kobj_attribute *attr,  in powercap_show()  argument
33 	struct powercap_attr *pcap_attr = container_of(attr,  in powercap_show()
34 						struct powercap_attr, attr);  in powercap_show()
49 	ret = opal_get_powercap(pcap_attr->handle, token, (u32 *)__pa(&pcap));  in powercap_show()
55 			ret = -EIO;  in powercap_show()
62 				ret = -EIO;  in powercap_show()
68 			ret = -EIO;  in powercap_show()
82 			      struct kobj_attribute *attr, const char *buf,  in powercap_store()  argument
85 	struct powercap_attr *pcap_attr = container_of(attr,  in powercap_store()
86 						struct powercap_attr, attr);  in powercap_store()
105 	ret = opal_set_powercap(pcap_attr->handle, token, pcap);  in powercap_store()
111 			ret = -EIO;  in powercap_store()
132 static void __init powercap_add_attr(int handle, const char *name,  in powercap_add_attr()  argument
133 			      struct powercap_attr *attr)  in powercap_add_attr()  argument
135 	attr->handle = handle;  in powercap_add_attr()
136 	sysfs_attr_init(&attr->attr.attr);  in powercap_add_attr()
137 	attr->attr.attr.name = name;  in powercap_add_attr()
138 	attr->attr.attr.mode = 0444;  in powercap_add_attr()
139 	attr->attr.show = powercap_show;  in powercap_add_attr()
147 	powercap = of_find_compatible_node(NULL, NULL, "ibm,opal-powercap");  in opal_powercap_init()
166 		u32 cur, min, max;  in opal_powercap_init()  local
170 		if (!of_property_read_u32(node, "powercap-min", &min)) {  in opal_powercap_init()
175 		if (!of_property_read_u32(node, "powercap-max", &max)) {  in opal_powercap_init()
180 		if (!of_property_read_u32(node, "powercap-current", &cur)) {  in opal_powercap_init()
198 		pcaps[i].pg.name = kasprintf(GFP_KERNEL, "%pOFn", node);  in opal_powercap_init()
199 		if (!pcaps[i].pg.name) {  in opal_powercap_init()
206 			powercap_add_attr(min, "powercap-min",  in opal_powercap_init()
208 			pcaps[i].pg.attrs[j] = &pcaps[i].pattrs[j].attr.attr;  in opal_powercap_init()
213 			powercap_add_attr(max, "powercap-max",  in opal_powercap_init()
215 			pcaps[i].pg.attrs[j] = &pcaps[i].pattrs[j].attr.attr;  in opal_powercap_init()
220 			powercap_add_attr(cur, "powercap-current",  in opal_powercap_init()
222 			pcaps[i].pattrs[j].attr.attr.mode |= 0220;  in opal_powercap_init()
223 			pcaps[i].pattrs[j].attr.store = powercap_store;  in opal_powercap_init()
224 			pcaps[i].pg.attrs[j] = &pcaps[i].pattrs[j].attr.attr;  in opal_powercap_init()
230 				pcaps[i].pg.name);  in opal_powercap_init()
240 	while (--i >= 0) {  in opal_powercap_init()
243 		kfree(pcaps[i].pg.name);  in opal_powercap_init()