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1 | /* | |
2 | * Generic OPP Interface | |
3 | * | |
4 | * Copyright (C) 2009-2010 Texas Instruments Incorporated. | |
5 | * Nishanth Menon | |
6 | * Romit Dasgupta | |
7 | * Kevin Hilman | |
8 | * | |
9 | * This program is free software; you can redistribute it and/or modify | |
10 | * it under the terms of the GNU General Public License version 2 as | |
11 | * published by the Free Software Foundation. | |
12 | */ | |
13 | ||
14 | #ifndef __LINUX_OPP_H__ | |
15 | #define __LINUX_OPP_H__ | |
16 | ||
17 | #include <linux/err.h> | |
18 | #include <linux/notifier.h> | |
19 | ||
20 | struct clk; | |
21 | struct regulator; | |
22 | struct dev_pm_opp; | |
23 | struct device; | |
24 | struct opp_table; | |
25 | ||
26 | enum dev_pm_opp_event { | |
27 | OPP_EVENT_ADD, OPP_EVENT_REMOVE, OPP_EVENT_ENABLE, OPP_EVENT_DISABLE, | |
28 | OPP_EVENT_ADJUST_VOLTAGE, | |
29 | }; | |
30 | ||
31 | /** | |
32 | * struct dev_pm_opp_supply - Power supply voltage/current values | |
33 | * @u_volt: Target voltage in microvolts corresponding to this OPP | |
34 | * @u_volt_min: Minimum voltage in microvolts corresponding to this OPP | |
35 | * @u_volt_max: Maximum voltage in microvolts corresponding to this OPP | |
36 | * @u_amp: Maximum current drawn by the device in microamperes | |
37 | * | |
38 | * This structure stores the voltage/current values for a single power supply. | |
39 | */ | |
40 | struct dev_pm_opp_supply { | |
41 | unsigned long u_volt; | |
42 | unsigned long u_volt_min; | |
43 | unsigned long u_volt_max; | |
44 | unsigned long u_amp; | |
45 | }; | |
46 | ||
47 | /** | |
48 | * struct dev_pm_opp_info - OPP freq/voltage/current values | |
49 | * @rate: Target clk rate in hz | |
50 | * @supplies: Array of voltage/current values for all power supplies | |
51 | * | |
52 | * This structure stores the freq/voltage/current values for a single OPP. | |
53 | */ | |
54 | struct dev_pm_opp_info { | |
55 | unsigned long rate; | |
56 | struct dev_pm_opp_supply *supplies; | |
57 | }; | |
58 | ||
59 | /** | |
60 | * struct dev_pm_set_opp_data - Set OPP data | |
61 | * @old_opp: Old OPP info | |
62 | * @new_opp: New OPP info | |
63 | * @regulators: Array of regulator pointers | |
64 | * @regulator_count: Number of regulators | |
65 | * @clk: Pointer to clk | |
66 | * @dev: Pointer to the struct device | |
67 | * | |
68 | * This structure contains all information required for setting an OPP. | |
69 | */ | |
70 | struct dev_pm_set_opp_data { | |
71 | struct dev_pm_opp_info old_opp; | |
72 | struct dev_pm_opp_info new_opp; | |
73 | ||
74 | struct regulator **regulators; | |
75 | unsigned int regulator_count; | |
76 | struct clk *clk; | |
77 | struct device *dev; | |
78 | }; | |
79 | ||
80 | #if defined(CONFIG_PM_OPP) | |
81 | ||
82 | struct opp_table *dev_pm_opp_get_opp_table(struct device *dev); | |
83 | void dev_pm_opp_put_opp_table(struct opp_table *opp_table); | |
84 | ||
85 | unsigned long dev_pm_opp_get_voltage(struct dev_pm_opp *opp); | |
86 | ||
87 | unsigned long dev_pm_opp_get_freq(struct dev_pm_opp *opp); | |
88 | struct regulator *dev_pm_opp_get_regulator(struct device *dev); | |
89 | ||
90 | bool dev_pm_opp_is_turbo(struct dev_pm_opp *opp); | |
91 | ||
92 | int dev_pm_opp_get_opp_count(struct device *dev); | |
93 | unsigned long dev_pm_opp_get_max_clock_latency(struct device *dev); | |
94 | unsigned long dev_pm_opp_get_max_volt_latency(struct device *dev); | |
95 | unsigned long dev_pm_opp_get_max_transition_latency(struct device *dev); | |
96 | unsigned long dev_pm_opp_get_suspend_opp_freq(struct device *dev); | |
97 | ||
98 | struct dev_pm_opp *dev_pm_opp_find_freq_exact(struct device *dev, | |
99 | unsigned long freq, | |
100 | bool available); | |
101 | ||
102 | struct dev_pm_opp *dev_pm_opp_find_freq_floor(struct device *dev, | |
103 | unsigned long *freq); | |
104 | ||
105 | struct dev_pm_opp *dev_pm_opp_find_freq_ceil(struct device *dev, | |
106 | unsigned long *freq); | |
107 | void dev_pm_opp_put(struct dev_pm_opp *opp); | |
108 | ||
109 | int dev_pm_opp_add(struct device *dev, unsigned long freq, | |
110 | unsigned long u_volt); | |
111 | void dev_pm_opp_remove(struct device *dev, unsigned long freq); | |
112 | ||
113 | int dev_pm_opp_adjust_voltage(struct device *dev, unsigned long freq, | |
114 | unsigned long u_volt); | |
115 | ||
116 | int dev_pm_opp_enable(struct device *dev, unsigned long freq); | |
117 | ||
118 | int dev_pm_opp_disable(struct device *dev, unsigned long freq); | |
119 | ||
120 | int dev_pm_opp_register_notifier(struct device *dev, struct notifier_block *nb); | |
121 | int dev_pm_opp_unregister_notifier(struct device *dev, struct notifier_block *nb); | |
122 | ||
123 | struct opp_table *dev_pm_opp_set_supported_hw(struct device *dev, const u32 *versions, unsigned int count); | |
124 | void dev_pm_opp_put_supported_hw(struct opp_table *opp_table); | |
125 | struct opp_table *dev_pm_opp_set_prop_name(struct device *dev, const char *name); | |
126 | void dev_pm_opp_put_prop_name(struct opp_table *opp_table); | |
127 | struct opp_table *dev_pm_opp_set_regulators(struct device *dev, const char * const names[], unsigned int count); | |
128 | void dev_pm_opp_put_regulators(struct opp_table *opp_table); | |
129 | struct opp_table *dev_pm_opp_set_clkname(struct device *dev, const char * name); | |
130 | void dev_pm_opp_put_clkname(struct opp_table *opp_table); | |
131 | struct opp_table *dev_pm_opp_register_set_opp_helper(struct device *dev, int (*set_opp)(struct dev_pm_set_opp_data *data)); | |
132 | void dev_pm_opp_unregister_set_opp_helper(struct opp_table *opp_table); | |
133 | struct opp_table *dev_pm_opp_register_get_pstate_helper(struct device *dev, int (*get_pstate)(struct device *dev, unsigned long rate)); | |
134 | void dev_pm_opp_unregister_get_pstate_helper(struct opp_table *opp_table); | |
135 | int dev_pm_opp_set_rate(struct device *dev, unsigned long target_freq); | |
136 | int dev_pm_opp_set_sharing_cpus(struct device *cpu_dev, const struct cpumask *cpumask); | |
137 | int dev_pm_opp_get_sharing_cpus(struct device *cpu_dev, struct cpumask *cpumask); | |
138 | void dev_pm_opp_remove_table(struct device *dev); | |
139 | void dev_pm_opp_cpumask_remove_table(const struct cpumask *cpumask); | |
140 | #else | |
141 | static inline struct opp_table *dev_pm_opp_get_opp_table(struct device *dev) | |
142 | { | |
143 | return ERR_PTR(-ENOTSUPP); | |
144 | } | |
145 | ||
146 | static inline void dev_pm_opp_put_opp_table(struct opp_table *opp_table) {} | |
147 | ||
148 | static inline unsigned long dev_pm_opp_get_voltage(struct dev_pm_opp *opp) | |
149 | { | |
150 | return 0; | |
151 | } | |
152 | ||
153 | static inline unsigned long dev_pm_opp_get_freq(struct dev_pm_opp *opp) | |
154 | { | |
155 | return 0; | |
156 | } | |
157 | ||
158 | static inline bool dev_pm_opp_is_turbo(struct dev_pm_opp *opp) | |
159 | { | |
160 | return false; | |
161 | } | |
162 | ||
163 | static inline int dev_pm_opp_get_opp_count(struct device *dev) | |
164 | { | |
165 | return 0; | |
166 | } | |
167 | ||
168 | static inline unsigned long dev_pm_opp_get_max_clock_latency(struct device *dev) | |
169 | { | |
170 | return 0; | |
171 | } | |
172 | ||
173 | static inline unsigned long dev_pm_opp_get_max_volt_latency(struct device *dev) | |
174 | { | |
175 | return 0; | |
176 | } | |
177 | ||
178 | static inline unsigned long dev_pm_opp_get_max_transition_latency(struct device *dev) | |
179 | { | |
180 | return 0; | |
181 | } | |
182 | ||
183 | static inline unsigned long dev_pm_opp_get_suspend_opp_freq(struct device *dev) | |
184 | { | |
185 | return 0; | |
186 | } | |
187 | ||
188 | static inline struct dev_pm_opp *dev_pm_opp_find_freq_exact(struct device *dev, | |
189 | unsigned long freq, bool available) | |
190 | { | |
191 | return ERR_PTR(-ENOTSUPP); | |
192 | } | |
193 | ||
194 | static inline struct dev_pm_opp *dev_pm_opp_find_freq_floor(struct device *dev, | |
195 | unsigned long *freq) | |
196 | { | |
197 | return ERR_PTR(-ENOTSUPP); | |
198 | } | |
199 | ||
200 | static inline struct dev_pm_opp *dev_pm_opp_find_freq_ceil(struct device *dev, | |
201 | unsigned long *freq) | |
202 | { | |
203 | return ERR_PTR(-ENOTSUPP); | |
204 | } | |
205 | ||
206 | static inline void dev_pm_opp_put(struct dev_pm_opp *opp) {} | |
207 | ||
208 | static inline int dev_pm_opp_add(struct device *dev, unsigned long freq, | |
209 | unsigned long u_volt) | |
210 | { | |
211 | return -ENOTSUPP; | |
212 | } | |
213 | ||
214 | static inline void dev_pm_opp_remove(struct device *dev, unsigned long freq) | |
215 | { | |
216 | } | |
217 | ||
218 | static inline int | |
219 | dev_pm_opp_adjust_voltage(struct device *dev, unsigned long freq, | |
220 | unsigned long u_volt) | |
221 | { | |
222 | return 0; | |
223 | } | |
224 | ||
225 | static inline int dev_pm_opp_enable(struct device *dev, unsigned long freq) | |
226 | { | |
227 | return 0; | |
228 | } | |
229 | ||
230 | static inline int dev_pm_opp_disable(struct device *dev, unsigned long freq) | |
231 | { | |
232 | return 0; | |
233 | } | |
234 | ||
235 | static inline int dev_pm_opp_register_notifier(struct device *dev, struct notifier_block *nb) | |
236 | { | |
237 | return -ENOTSUPP; | |
238 | } | |
239 | ||
240 | static inline int dev_pm_opp_unregister_notifier(struct device *dev, struct notifier_block *nb) | |
241 | { | |
242 | return -ENOTSUPP; | |
243 | } | |
244 | ||
245 | static inline struct opp_table *dev_pm_opp_set_supported_hw(struct device *dev, | |
246 | const u32 *versions, | |
247 | unsigned int count) | |
248 | { | |
249 | return ERR_PTR(-ENOTSUPP); | |
250 | } | |
251 | ||
252 | static inline void dev_pm_opp_put_supported_hw(struct opp_table *opp_table) {} | |
253 | ||
254 | static inline struct opp_table *dev_pm_opp_register_set_opp_helper(struct device *dev, | |
255 | int (*set_opp)(struct dev_pm_set_opp_data *data)) | |
256 | { | |
257 | return ERR_PTR(-ENOTSUPP); | |
258 | } | |
259 | ||
260 | static inline void dev_pm_opp_unregister_set_opp_helper(struct opp_table *opp_table) {} | |
261 | ||
262 | static inline struct opp_table *dev_pm_opp_register_get_pstate_helper(struct device *dev, | |
263 | int (*get_pstate)(struct device *dev, unsigned long rate)) | |
264 | { | |
265 | return ERR_PTR(-ENOTSUPP); | |
266 | } | |
267 | ||
268 | static inline void dev_pm_opp_unregister_get_pstate_helper(struct opp_table *opp_table) {} | |
269 | ||
270 | static inline struct opp_table *dev_pm_opp_set_prop_name(struct device *dev, const char *name) | |
271 | { | |
272 | return ERR_PTR(-ENOTSUPP); | |
273 | } | |
274 | ||
275 | static inline void dev_pm_opp_put_prop_name(struct opp_table *opp_table) {} | |
276 | ||
277 | static inline struct opp_table *dev_pm_opp_set_regulators(struct device *dev, const char * const names[], unsigned int count) | |
278 | { | |
279 | return ERR_PTR(-ENOTSUPP); | |
280 | } | |
281 | ||
282 | static inline void dev_pm_opp_put_regulators(struct opp_table *opp_table) {} | |
283 | ||
284 | static inline struct opp_table *dev_pm_opp_set_clkname(struct device *dev, const char * name) | |
285 | { | |
286 | return ERR_PTR(-ENOTSUPP); | |
287 | } | |
288 | ||
289 | static inline void dev_pm_opp_put_clkname(struct opp_table *opp_table) {} | |
290 | ||
291 | static inline int dev_pm_opp_set_rate(struct device *dev, unsigned long target_freq) | |
292 | { | |
293 | return -ENOTSUPP; | |
294 | } | |
295 | ||
296 | static inline int dev_pm_opp_set_sharing_cpus(struct device *cpu_dev, const struct cpumask *cpumask) | |
297 | { | |
298 | return -ENOTSUPP; | |
299 | } | |
300 | ||
301 | static inline int dev_pm_opp_get_sharing_cpus(struct device *cpu_dev, struct cpumask *cpumask) | |
302 | { | |
303 | return -EINVAL; | |
304 | } | |
305 | ||
306 | static inline void dev_pm_opp_remove_table(struct device *dev) | |
307 | { | |
308 | } | |
309 | ||
310 | static inline void dev_pm_opp_cpumask_remove_table(const struct cpumask *cpumask) | |
311 | { | |
312 | } | |
313 | ||
314 | #endif /* CONFIG_PM_OPP */ | |
315 | ||
316 | #if defined(CONFIG_PM_OPP) && defined(CONFIG_OF) | |
317 | int dev_pm_opp_of_add_table(struct device *dev); | |
318 | void dev_pm_opp_of_remove_table(struct device *dev); | |
319 | int dev_pm_opp_of_cpumask_add_table(const struct cpumask *cpumask); | |
320 | void dev_pm_opp_of_cpumask_remove_table(const struct cpumask *cpumask); | |
321 | int dev_pm_opp_of_get_sharing_cpus(struct device *cpu_dev, struct cpumask *cpumask); | |
322 | struct device_node *dev_pm_opp_of_get_opp_desc_node(struct device *dev); | |
323 | #else | |
324 | static inline int dev_pm_opp_of_add_table(struct device *dev) | |
325 | { | |
326 | return -ENOTSUPP; | |
327 | } | |
328 | ||
329 | static inline void dev_pm_opp_of_remove_table(struct device *dev) | |
330 | { | |
331 | } | |
332 | ||
333 | static inline int dev_pm_opp_of_cpumask_add_table(const struct cpumask *cpumask) | |
334 | { | |
335 | return -ENOTSUPP; | |
336 | } | |
337 | ||
338 | static inline void dev_pm_opp_of_cpumask_remove_table(const struct cpumask *cpumask) | |
339 | { | |
340 | } | |
341 | ||
342 | static inline int dev_pm_opp_of_get_sharing_cpus(struct device *cpu_dev, struct cpumask *cpumask) | |
343 | { | |
344 | return -ENOTSUPP; | |
345 | } | |
346 | ||
347 | static inline struct device_node *dev_pm_opp_of_get_opp_desc_node(struct device *dev) | |
348 | { | |
349 | return NULL; | |
350 | } | |
351 | #endif | |
352 | ||
353 | #endif /* __LINUX_OPP_H__ */ |