1 // SPDX-License-Identifier: GPL-2.0
7  * of_get_cpu_hwid - Get the hardware ID from a CPU device node
9  * @cpun: CPU number(logical index) for which device node is required
16 	const __be32 *cell;  in of_get_cpu_hwid()  local
20 	cell = of_get_property(cpun, "reg", &len);  in of_get_cpu_hwid()
21 	if (!cell || !ac || ((sizeof(*cell) * ac * (thread + 1)) > len))  in of_get_cpu_hwid()
24 	cell += ac * thread;  in of_get_cpu_hwid()
25 	return of_read_number(cell, ac);  in of_get_cpu_hwid()
29  * arch_match_cpu_phys_id - Match the given logical CPU and physical id
31  * @cpu: logical cpu index of a core/thread
34  * CPU logical to physical index mapping is architecture specific.
36  * id to logical cpu index. phys_id provided here is usually values read
39  * Returns true if the physical identifier and the logical cpu index
55 	const __be32 *cell;  in __of_find_n_match_cpu_property()  local
60 	cell = of_get_property(cpun, prop_name, &prop_len);  in __of_find_n_match_cpu_property()
61 	if (!cell && !ac && arch_match_cpu_phys_id(cpu, 0))  in __of_find_n_match_cpu_property()
63 	if (!cell || !ac)  in __of_find_n_match_cpu_property()
65 	prop_len /= sizeof(*cell) * ac;  in __of_find_n_match_cpu_property()
67 		hwid = of_read_number(cell, ac);  in __of_find_n_match_cpu_property()
73 		cell += ac;  in __of_find_n_match_cpu_property()
79  * arch_find_n_match_cpu_physical_id - See if the given device node is
81  * else false.  If 'thread' is non-NULL, the local thread number within the
87 	/* Check for non-standard "ibm,ppc-interrupt-server#s" property  in arch_find_n_match_cpu_physical_id()
93 					   "ibm,ppc-interrupt-server#s",  in arch_find_n_match_cpu_physical_id()
101  * of_get_cpu_node - Get device node associated with the given logical CPU
103  * @cpu: CPU number(logical index) for which device node is required
108  * given logical CPU index. It should be used to initialize the of_node in
112  * CPU logical to physical index mapping is architecture specific and is built
146 	return of_node_get(cpu_dev->of_node);  in of_cpu_device_node_get()
155  * Return: The logical CPU number of the given CPU device_node or -ENODEV if the
172 	return -ENODEV;  in of_cpu_node_to_id()
177  * of_get_cpu_state_node - Get CPU's idle state node at the given index
180  * @index: The index in the list of the idle states
183  * a flattened description through the "cpu-idle-states" binding or via the
184  * hierarchical layout, using the "power-domains" and the "domain-idle-states"
186  * the requested index.
188  * Return: An idle state node if found at @index. The refcount is incremented
192 					  int index)  in of_get_cpu_state_node()  argument
197 	err = of_parse_phandle_with_args(cpu_node, "power-domains",  in of_get_cpu_state_node()
198 					"#power-domain-cells", 0, &args);  in of_get_cpu_state_node()
201 			of_parse_phandle(args.np, "domain-idle-states", index);  in of_get_cpu_state_node()
208 	return of_parse_phandle(cpu_node, "cpu-idle-states", index);  in of_get_cpu_state_node()