1 // SPDX-License-Identifier: GPL-2.0-only
3  * Match running platform with pre-defined OPP values for CPUFreq
11 #include <linux/cpu.h>
13 #include <linux/mfd/syscon.h>
43  * struct sti_cpufreq_ddata - ST CPUFreq Driver Data
45  * @cpu:		CPU's OF node
46  * @syscfg_eng:		Engineering Syscon register map
47  * @syscfg:		Syscon register map
50 	struct device *cpu;  member
56 	struct device_node *np = ddata.cpu->of_node;  in sti_cpufreq_fetch_major()
57 	struct device *dev = ddata.cpu;  in sti_cpufreq_fetch_major()
72 		dev_err(dev, "Failed to read major number from syscon [%d]\n",  in sti_cpufreq_fetch_major()
82 	struct device *dev = ddata.cpu;  in sti_cpufreq_fetch_minor()
83 	struct device_node *np = dev->of_node;  in sti_cpufreq_fetch_minor()
88 	ret = of_property_read_u32_index(np, "st,syscfg-eng",  in sti_cpufreq_fetch_minor()
100 			"Failed to read the minor number from syscon [%d]\n",  in sti_cpufreq_fetch_minor()
113 	struct device *dev = ddata.cpu;  in sti_cpufreq_fetch_regmap_field()
153 	struct device *dev = ddata.cpu;  in sti_cpufreq_set_opp_info()
154 	struct device_node *np = dev->of_node;  in sti_cpufreq_set_opp_info()
170 		return -ENODEV;  in sti_cpufreq_set_opp_info()
173 	ret = of_property_read_u32_index(np, "st,syscfg-eng",  in sti_cpufreq_set_opp_info()
237 	struct device *dev = ddata.cpu;  in sti_cpufreq_fetch_syscon_registers()
238 	struct device_node *np = dev->of_node;  in sti_cpufreq_fetch_syscon_registers()
246 	ddata.syscfg_eng = syscon_regmap_lookup_by_phandle(np, "st,syscfg-eng");  in sti_cpufreq_fetch_syscon_registers()
248 		dev_err(dev, "\"st,syscfg-eng\" not supplied\n");  in sti_cpufreq_fetch_syscon_registers()
262 		return -ENODEV;  in sti_cpufreq_init()
264 	ddata.cpu = get_cpu_device(0);  in sti_cpufreq_init()
265 	if (!ddata.cpu) {  in sti_cpufreq_init()
266 		dev_err(ddata.cpu, "Failed to get device for CPU0\n");  in sti_cpufreq_init()
270 	if (!of_get_property(ddata.cpu->of_node, "operating-points-v2", NULL)) {  in sti_cpufreq_init()
271 		dev_err(ddata.cpu, "OPP-v2 not supported\n");  in sti_cpufreq_init()
284 	dev_err(ddata.cpu, "Not doing voltage scaling\n");  in sti_cpufreq_init()
287 	platform_device_register_simple("cpufreq-dt", -1, NULL, 0);  in sti_cpufreq_init()