1 // SPDX-License-Identifier: GPL-2.0-or-later
44 	void __iomem *base;  in of_syscon_register()  local
56 		return ERR_PTR(-ENOMEM);  in of_syscon_register()
59 		return ERR_PTR(-ENOMEM);  in of_syscon_register()
61 	base = of_iomap(np, 0);  in of_syscon_register()
62 	if (!base)  in of_syscon_register()
63 		return ERR_PTR(-ENOMEM);  in of_syscon_register()
65 	/* Parse the device's DT node for an endianness specification */  in of_syscon_register()
66 	if (of_property_read_bool(np, "big-endian"))  in of_syscon_register()
68 	else if (of_property_read_bool(np, "little-endian"))  in of_syscon_register()
70 	else if (of_property_read_bool(np, "native-endian"))  in of_syscon_register()
74 	 * search for reg-io-width property in DT. If it is not provided,  in of_syscon_register()
76 	 * are invalid so there is no need to check them here.  in of_syscon_register()
78 	ret = of_property_read_u32(np, "reg-io-width", &reg_io_width);  in of_syscon_register()
89 		case -ENOENT:  in of_syscon_register()
95 		case -EPROBE_DEFER:  in of_syscon_register()
102 		ret = -EFAULT;  in of_syscon_register()
108 		ret = -ENOMEM;  in of_syscon_register()
113 	syscon_config.max_register = res_size - reg_io_width;  in of_syscon_register()
117 	regmap = regmap_init_mmio(NULL, base, &syscon_config);  in of_syscon_register()
130 			if (ret != -ENOENT)  in of_syscon_register()
149 	syscon->regmap = regmap;  in of_syscon_register()
150 	syscon->np = np;  in of_syscon_register()
152 	list_add_tail(&syscon->list, &syscon_list);  in of_syscon_register()
164 	iounmap(base);  in of_syscon_register()
177 		if (entry->np == np) {  in device_node_get_regmap()
186 			syscon = ERR_PTR(-EINVAL);  in device_node_get_regmap()
193 	return syscon->regmap;  in device_node_get_regmap()
197  * of_syscon_register_regmap() - Register regmap for specified device node
213 		return -EINVAL;  in of_syscon_register_regmap()
217 		return -ENOMEM;  in of_syscon_register_regmap()
219 	/* check if syscon entry already exists */  in of_syscon_register_regmap()
223 		if (entry->np == np) {  in of_syscon_register_regmap()
224 			ret = -EEXIST;  in of_syscon_register_regmap()
228 	syscon->regmap = regmap;  in of_syscon_register_regmap()
229 	syscon->np = np;  in of_syscon_register_regmap()
232 	list_add_tail(&syscon->list, &syscon_list);  in of_syscon_register_regmap()
245  * device_node_to_regmap() - Get or create a regmap for specified device node
262  * syscon_node_to_regmap() - Get or create a regmap for specified syscon device node
285 		return ERR_PTR(-ENODEV);  in syscon_regmap_lookup_by_compatible()
306 		return ERR_PTR(-ENODEV);  in syscon_regmap_lookup_by_phandle()
335 		return ERR_PTR(-ENODEV);  in syscon_regmap_lookup_by_phandle_args()
348  * there is no regmap phandle. In this case, instead of returning -ENODEV,
357 	if (IS_ERR(regmap) && PTR_ERR(regmap) == -ENODEV)  in syscon_regmap_lookup_by_phandle_optional()