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e2ce4eaa LG |
1 | /* |
2 | * consumer.h -- SoC Regulator consumer support. | |
3 | * | |
4 | * Copyright (C) 2007, 2008 Wolfson Microelectronics PLC. | |
5 | * | |
1dd68f01 | 6 | * Author: Liam Girdwood <lrg@slimlogic.co.uk> |
e2ce4eaa LG |
7 | * |
8 | * This program is free software; you can redistribute it and/or modify | |
9 | * it under the terms of the GNU General Public License version 2 as | |
10 | * published by the Free Software Foundation. | |
11 | * | |
12 | * Regulator Consumer Interface. | |
13 | * | |
14 | * A Power Management Regulator framework for SoC based devices. | |
15 | * Features:- | |
16 | * o Voltage and current level control. | |
17 | * o Operating mode control. | |
18 | * o Regulator status. | |
19 | * o sysfs entries for showing client devices and status | |
20 | * | |
21 | * EXPERIMENTAL FEATURES: | |
22 | * Dynamic Regulator operating Mode Switching (DRMS) - allows regulators | |
23 | * to use most efficient operating mode depending upon voltage and load and | |
24 | * is transparent to client drivers. | |
25 | * | |
26 | * e.g. Devices x,y,z share regulator r. Device x and y draw 20mA each during | |
27 | * IO and 1mA at idle. Device z draws 100mA when under load and 5mA when | |
28 | * idling. Regulator r has > 90% efficiency in NORMAL mode at loads > 100mA | |
29 | * but this drops rapidly to 60% when below 100mA. Regulator r has > 90% | |
30 | * efficiency in IDLE mode at loads < 10mA. Thus regulator r will operate | |
31 | * in normal mode for loads > 10mA and in IDLE mode for load <= 10mA. | |
32 | * | |
33 | */ | |
34 | ||
35 | #ifndef __LINUX_REGULATOR_CONSUMER_H_ | |
36 | #define __LINUX_REGULATOR_CONSUMER_H_ | |
37 | ||
313162d0 PG |
38 | struct device; |
39 | struct notifier_block; | |
b56daf13 | 40 | |
e2ce4eaa LG |
41 | /* |
42 | * Regulator operating modes. | |
43 | * | |
44 | * Regulators can run in a variety of different operating modes depending on | |
45 | * output load. This allows further system power savings by selecting the | |
46 | * best (and most efficient) regulator mode for a desired load. | |
47 | * | |
48 | * Most drivers will only care about NORMAL. The modes below are generic and | |
49 | * will probably not match the naming convention of your regulator data sheet | |
50 | * but should match the use cases in the datasheet. | |
51 | * | |
52 | * In order of power efficiency (least efficient at top). | |
53 | * | |
54 | * Mode Description | |
55 | * FAST Regulator can handle fast changes in it's load. | |
56 | * e.g. useful in CPU voltage & frequency scaling where | |
57 | * load can quickly increase with CPU frequency increases. | |
58 | * | |
59 | * NORMAL Normal regulator power supply mode. Most drivers will | |
60 | * use this mode. | |
61 | * | |
62 | * IDLE Regulator runs in a more efficient mode for light | |
63 | * loads. Can be used for devices that have a low power | |
64 | * requirement during periods of inactivity. This mode | |
65 | * may be more noisy than NORMAL and may not be able | |
66 | * to handle fast load switching. | |
67 | * | |
68 | * STANDBY Regulator runs in the most efficient mode for very | |
69 | * light loads. Can be used by devices when they are | |
70 | * in a sleep/standby state. This mode is likely to be | |
71 | * the most noisy and may not be able to handle fast load | |
72 | * switching. | |
73 | * | |
74 | * NOTE: Most regulators will only support a subset of these modes. Some | |
75 | * will only just support NORMAL. | |
76 | * | |
77 | * These modes can be OR'ed together to make up a mask of valid register modes. | |
78 | */ | |
79 | ||
80 | #define REGULATOR_MODE_FAST 0x1 | |
81 | #define REGULATOR_MODE_NORMAL 0x2 | |
82 | #define REGULATOR_MODE_IDLE 0x4 | |
83 | #define REGULATOR_MODE_STANDBY 0x8 | |
84 | ||
85 | /* | |
86 | * Regulator notifier events. | |
87 | * | |
88 | * UNDER_VOLTAGE Regulator output is under voltage. | |
89 | * OVER_CURRENT Regulator output current is too high. | |
90 | * REGULATION_OUT Regulator output is out of regulation. | |
91 | * FAIL Regulator output has failed. | |
92 | * OVER_TEMP Regulator over temp. | |
84b68263 | 93 | * FORCE_DISABLE Regulator forcibly shut down by software. |
b136fb44 | 94 | * VOLTAGE_CHANGE Regulator voltage changed. |
84b68263 | 95 | * DISABLE Regulator was disabled. |
e2ce4eaa LG |
96 | * |
97 | * NOTE: These events can be OR'ed together when passed into handler. | |
98 | */ | |
99 | ||
100 | #define REGULATOR_EVENT_UNDER_VOLTAGE 0x01 | |
101 | #define REGULATOR_EVENT_OVER_CURRENT 0x02 | |
102 | #define REGULATOR_EVENT_REGULATION_OUT 0x04 | |
103 | #define REGULATOR_EVENT_FAIL 0x08 | |
104 | #define REGULATOR_EVENT_OVER_TEMP 0x10 | |
105 | #define REGULATOR_EVENT_FORCE_DISABLE 0x20 | |
b136fb44 | 106 | #define REGULATOR_EVENT_VOLTAGE_CHANGE 0x40 |
84b68263 | 107 | #define REGULATOR_EVENT_DISABLE 0x80 |
e2ce4eaa LG |
108 | |
109 | struct regulator; | |
110 | ||
111 | /** | |
112 | * struct regulator_bulk_data - Data used for bulk regulator operations. | |
113 | * | |
69279fb9 MB |
114 | * @supply: The name of the supply. Initialised by the user before |
115 | * using the bulk regulator APIs. | |
116 | * @consumer: The regulator consumer for the supply. This will be managed | |
117 | * by the bulk API. | |
e2ce4eaa LG |
118 | * |
119 | * The regulator APIs provide a series of regulator_bulk_() API calls as | |
120 | * a convenience to consumers which require multiple supplies. This | |
121 | * structure is used to manage data for these calls. | |
122 | */ | |
123 | struct regulator_bulk_data { | |
124 | const char *supply; | |
125 | struct regulator *consumer; | |
f21e0e81 | 126 | |
bff747c5 | 127 | /* private: Internal use */ |
f21e0e81 | 128 | int ret; |
e2ce4eaa LG |
129 | }; |
130 | ||
131 | #if defined(CONFIG_REGULATOR) | |
132 | ||
133 | /* regulator get and put */ | |
134 | struct regulator *__must_check regulator_get(struct device *dev, | |
135 | const char *id); | |
070b9079 SB |
136 | struct regulator *__must_check devm_regulator_get(struct device *dev, |
137 | const char *id); | |
5ffbd136 MB |
138 | struct regulator *__must_check regulator_get_exclusive(struct device *dev, |
139 | const char *id); | |
e2ce4eaa | 140 | void regulator_put(struct regulator *regulator); |
2950c4bb | 141 | void devm_regulator_put(struct regulator *regulator); |
e2ce4eaa LG |
142 | |
143 | /* regulator output control and status */ | |
c8801a8e | 144 | int __must_check regulator_enable(struct regulator *regulator); |
e2ce4eaa LG |
145 | int regulator_disable(struct regulator *regulator); |
146 | int regulator_force_disable(struct regulator *regulator); | |
147 | int regulator_is_enabled(struct regulator *regulator); | |
da07ecd9 | 148 | int regulator_disable_deferred(struct regulator *regulator, int ms); |
e2ce4eaa | 149 | |
c8801a8e MB |
150 | int __must_check regulator_bulk_get(struct device *dev, int num_consumers, |
151 | struct regulator_bulk_data *consumers); | |
152 | int __must_check devm_regulator_bulk_get(struct device *dev, int num_consumers, | |
153 | struct regulator_bulk_data *consumers); | |
154 | int __must_check regulator_bulk_enable(int num_consumers, | |
155 | struct regulator_bulk_data *consumers); | |
e2ce4eaa LG |
156 | int regulator_bulk_disable(int num_consumers, |
157 | struct regulator_bulk_data *consumers); | |
e1de2f42 DK |
158 | int regulator_bulk_force_disable(int num_consumers, |
159 | struct regulator_bulk_data *consumers); | |
e2ce4eaa LG |
160 | void regulator_bulk_free(int num_consumers, |
161 | struct regulator_bulk_data *consumers); | |
162 | ||
d1e7de30 | 163 | int regulator_can_change_voltage(struct regulator *regulator); |
4367cfdc DB |
164 | int regulator_count_voltages(struct regulator *regulator); |
165 | int regulator_list_voltage(struct regulator *regulator, unsigned selector); | |
a7a1ad90 MB |
166 | int regulator_is_supported_voltage(struct regulator *regulator, |
167 | int min_uV, int max_uV); | |
2a668a8b | 168 | unsigned int regulator_get_linear_step(struct regulator *regulator); |
e2ce4eaa | 169 | int regulator_set_voltage(struct regulator *regulator, int min_uV, int max_uV); |
88cd222b LW |
170 | int regulator_set_voltage_time(struct regulator *regulator, |
171 | int old_uV, int new_uV); | |
e2ce4eaa | 172 | int regulator_get_voltage(struct regulator *regulator); |
606a2562 | 173 | int regulator_sync_voltage(struct regulator *regulator); |
e2ce4eaa LG |
174 | int regulator_set_current_limit(struct regulator *regulator, |
175 | int min_uA, int max_uA); | |
176 | int regulator_get_current_limit(struct regulator *regulator); | |
177 | ||
178 | int regulator_set_mode(struct regulator *regulator, unsigned int mode); | |
179 | unsigned int regulator_get_mode(struct regulator *regulator); | |
180 | int regulator_set_optimum_mode(struct regulator *regulator, int load_uA); | |
181 | ||
f59c8f9f MB |
182 | int regulator_allow_bypass(struct regulator *regulator, bool allow); |
183 | ||
e2ce4eaa LG |
184 | /* regulator notifier block */ |
185 | int regulator_register_notifier(struct regulator *regulator, | |
186 | struct notifier_block *nb); | |
187 | int regulator_unregister_notifier(struct regulator *regulator, | |
188 | struct notifier_block *nb); | |
189 | ||
190 | /* driver data - core doesn't touch */ | |
191 | void *regulator_get_drvdata(struct regulator *regulator); | |
192 | void regulator_set_drvdata(struct regulator *regulator, void *data); | |
193 | ||
194 | #else | |
195 | ||
196 | /* | |
197 | * Make sure client drivers will still build on systems with no software | |
198 | * controllable voltage or current regulators. | |
199 | */ | |
200 | static inline struct regulator *__must_check regulator_get(struct device *dev, | |
201 | const char *id) | |
202 | { | |
203 | /* Nothing except the stubbed out regulator API should be | |
204 | * looking at the value except to check if it is an error | |
be1a50d4 JD |
205 | * value. Drivers are free to handle NULL specifically by |
206 | * skipping all regulator API calls, but they don't have to. | |
207 | * Drivers which don't, should make sure they properly handle | |
208 | * corner cases of the API, such as regulator_get_voltage() | |
209 | * returning 0. | |
e2ce4eaa | 210 | */ |
be1a50d4 | 211 | return NULL; |
e2ce4eaa | 212 | } |
070b9079 | 213 | |
4bdfb272 MB |
214 | static inline struct regulator *__must_check |
215 | regulator_get_exclusive(struct device *dev, const char *id) | |
216 | { | |
217 | return NULL; | |
218 | } | |
219 | ||
220 | ||
070b9079 SB |
221 | static inline struct regulator *__must_check |
222 | devm_regulator_get(struct device *dev, const char *id) | |
223 | { | |
224 | return NULL; | |
225 | } | |
226 | ||
e2ce4eaa LG |
227 | static inline void regulator_put(struct regulator *regulator) |
228 | { | |
229 | } | |
230 | ||
2950c4bb AL |
231 | static inline void devm_regulator_put(struct regulator *regulator) |
232 | { | |
233 | } | |
234 | ||
e2ce4eaa LG |
235 | static inline int regulator_enable(struct regulator *regulator) |
236 | { | |
237 | return 0; | |
238 | } | |
239 | ||
240 | static inline int regulator_disable(struct regulator *regulator) | |
241 | { | |
242 | return 0; | |
243 | } | |
244 | ||
935a5210 MH |
245 | static inline int regulator_force_disable(struct regulator *regulator) |
246 | { | |
247 | return 0; | |
248 | } | |
249 | ||
da07ecd9 MB |
250 | static inline int regulator_disable_deferred(struct regulator *regulator, |
251 | int ms) | |
252 | { | |
253 | return 0; | |
254 | } | |
255 | ||
e2ce4eaa LG |
256 | static inline int regulator_is_enabled(struct regulator *regulator) |
257 | { | |
258 | return 1; | |
259 | } | |
260 | ||
261 | static inline int regulator_bulk_get(struct device *dev, | |
262 | int num_consumers, | |
263 | struct regulator_bulk_data *consumers) | |
264 | { | |
265 | return 0; | |
266 | } | |
267 | ||
e24abd6e AL |
268 | static inline int devm_regulator_bulk_get(struct device *dev, int num_consumers, |
269 | struct regulator_bulk_data *consumers) | |
270 | { | |
271 | return 0; | |
272 | } | |
273 | ||
e2ce4eaa LG |
274 | static inline int regulator_bulk_enable(int num_consumers, |
275 | struct regulator_bulk_data *consumers) | |
276 | { | |
277 | return 0; | |
278 | } | |
279 | ||
280 | static inline int regulator_bulk_disable(int num_consumers, | |
281 | struct regulator_bulk_data *consumers) | |
282 | { | |
283 | return 0; | |
284 | } | |
285 | ||
e1de2f42 DK |
286 | static inline int regulator_bulk_force_disable(int num_consumers, |
287 | struct regulator_bulk_data *consumers) | |
288 | { | |
289 | return 0; | |
290 | } | |
291 | ||
e2ce4eaa LG |
292 | static inline void regulator_bulk_free(int num_consumers, |
293 | struct regulator_bulk_data *consumers) | |
294 | { | |
295 | } | |
296 | ||
297 | static inline int regulator_set_voltage(struct regulator *regulator, | |
298 | int min_uV, int max_uV) | |
299 | { | |
300 | return 0; | |
301 | } | |
302 | ||
303 | static inline int regulator_get_voltage(struct regulator *regulator) | |
304 | { | |
08aed2f6 | 305 | return -EINVAL; |
e2ce4eaa LG |
306 | } |
307 | ||
4fe23791 PR |
308 | static inline int regulator_is_supported_voltage(struct regulator *regulator, |
309 | int min_uV, int max_uV) | |
310 | { | |
311 | return 0; | |
312 | } | |
313 | ||
e2ce4eaa LG |
314 | static inline int regulator_set_current_limit(struct regulator *regulator, |
315 | int min_uA, int max_uA) | |
316 | { | |
317 | return 0; | |
318 | } | |
319 | ||
320 | static inline int regulator_get_current_limit(struct regulator *regulator) | |
321 | { | |
322 | return 0; | |
323 | } | |
324 | ||
325 | static inline int regulator_set_mode(struct regulator *regulator, | |
326 | unsigned int mode) | |
327 | { | |
328 | return 0; | |
329 | } | |
330 | ||
331 | static inline unsigned int regulator_get_mode(struct regulator *regulator) | |
332 | { | |
333 | return REGULATOR_MODE_NORMAL; | |
334 | } | |
335 | ||
336 | static inline int regulator_set_optimum_mode(struct regulator *regulator, | |
337 | int load_uA) | |
338 | { | |
339 | return REGULATOR_MODE_NORMAL; | |
340 | } | |
341 | ||
f59c8f9f MB |
342 | static inline int regulator_allow_bypass(struct regulator *regulator, |
343 | bool allow) | |
344 | { | |
345 | return 0; | |
346 | } | |
347 | ||
e2ce4eaa LG |
348 | static inline int regulator_register_notifier(struct regulator *regulator, |
349 | struct notifier_block *nb) | |
350 | { | |
351 | return 0; | |
352 | } | |
353 | ||
354 | static inline int regulator_unregister_notifier(struct regulator *regulator, | |
355 | struct notifier_block *nb) | |
356 | { | |
357 | return 0; | |
358 | } | |
359 | ||
360 | static inline void *regulator_get_drvdata(struct regulator *regulator) | |
361 | { | |
362 | return NULL; | |
363 | } | |
364 | ||
365 | static inline void regulator_set_drvdata(struct regulator *regulator, | |
366 | void *data) | |
367 | { | |
368 | } | |
369 | ||
1a8f85d4 PR |
370 | static inline int regulator_count_voltages(struct regulator *regulator) |
371 | { | |
372 | return 0; | |
373 | } | |
e2ce4eaa LG |
374 | #endif |
375 | ||
3f196577 SG |
376 | static inline int regulator_set_voltage_tol(struct regulator *regulator, |
377 | int new_uV, int tol_uV) | |
378 | { | |
379 | return regulator_set_voltage(regulator, | |
380 | new_uV - tol_uV, new_uV + tol_uV); | |
381 | } | |
382 | ||
fe1e43f7 MB |
383 | static inline int regulator_is_supported_voltage_tol(struct regulator *regulator, |
384 | int target_uV, int tol_uV) | |
385 | { | |
386 | return regulator_is_supported_voltage(regulator, | |
387 | target_uV - tol_uV, | |
388 | target_uV + tol_uV); | |
389 | } | |
390 | ||
e2ce4eaa | 391 | #endif |