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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 | ||
b56daf13 LG |
38 | #include <linux/device.h> |
39 | ||
e2ce4eaa LG |
40 | /* |
41 | * Regulator operating modes. | |
42 | * | |
43 | * Regulators can run in a variety of different operating modes depending on | |
44 | * output load. This allows further system power savings by selecting the | |
45 | * best (and most efficient) regulator mode for a desired load. | |
46 | * | |
47 | * Most drivers will only care about NORMAL. The modes below are generic and | |
48 | * will probably not match the naming convention of your regulator data sheet | |
49 | * but should match the use cases in the datasheet. | |
50 | * | |
51 | * In order of power efficiency (least efficient at top). | |
52 | * | |
53 | * Mode Description | |
54 | * FAST Regulator can handle fast changes in it's load. | |
55 | * e.g. useful in CPU voltage & frequency scaling where | |
56 | * load can quickly increase with CPU frequency increases. | |
57 | * | |
58 | * NORMAL Normal regulator power supply mode. Most drivers will | |
59 | * use this mode. | |
60 | * | |
61 | * IDLE Regulator runs in a more efficient mode for light | |
62 | * loads. Can be used for devices that have a low power | |
63 | * requirement during periods of inactivity. This mode | |
64 | * may be more noisy than NORMAL and may not be able | |
65 | * to handle fast load switching. | |
66 | * | |
67 | * STANDBY Regulator runs in the most efficient mode for very | |
68 | * light loads. Can be used by devices when they are | |
69 | * in a sleep/standby state. This mode is likely to be | |
70 | * the most noisy and may not be able to handle fast load | |
71 | * switching. | |
72 | * | |
73 | * NOTE: Most regulators will only support a subset of these modes. Some | |
74 | * will only just support NORMAL. | |
75 | * | |
76 | * These modes can be OR'ed together to make up a mask of valid register modes. | |
77 | */ | |
78 | ||
79 | #define REGULATOR_MODE_FAST 0x1 | |
80 | #define REGULATOR_MODE_NORMAL 0x2 | |
81 | #define REGULATOR_MODE_IDLE 0x4 | |
82 | #define REGULATOR_MODE_STANDBY 0x8 | |
83 | ||
84 | /* | |
85 | * Regulator notifier events. | |
86 | * | |
87 | * UNDER_VOLTAGE Regulator output is under voltage. | |
88 | * OVER_CURRENT Regulator output current is too high. | |
89 | * REGULATION_OUT Regulator output is out of regulation. | |
90 | * FAIL Regulator output has failed. | |
91 | * OVER_TEMP Regulator over temp. | |
84b68263 | 92 | * FORCE_DISABLE Regulator forcibly shut down by software. |
b136fb44 | 93 | * VOLTAGE_CHANGE Regulator voltage changed. |
84b68263 | 94 | * DISABLE Regulator was disabled. |
e2ce4eaa LG |
95 | * |
96 | * NOTE: These events can be OR'ed together when passed into handler. | |
97 | */ | |
98 | ||
99 | #define REGULATOR_EVENT_UNDER_VOLTAGE 0x01 | |
100 | #define REGULATOR_EVENT_OVER_CURRENT 0x02 | |
101 | #define REGULATOR_EVENT_REGULATION_OUT 0x04 | |
102 | #define REGULATOR_EVENT_FAIL 0x08 | |
103 | #define REGULATOR_EVENT_OVER_TEMP 0x10 | |
104 | #define REGULATOR_EVENT_FORCE_DISABLE 0x20 | |
b136fb44 | 105 | #define REGULATOR_EVENT_VOLTAGE_CHANGE 0x40 |
84b68263 | 106 | #define REGULATOR_EVENT_DISABLE 0x80 |
e2ce4eaa LG |
107 | |
108 | struct regulator; | |
109 | ||
110 | /** | |
111 | * struct regulator_bulk_data - Data used for bulk regulator operations. | |
112 | * | |
69279fb9 MB |
113 | * @supply: The name of the supply. Initialised by the user before |
114 | * using the bulk regulator APIs. | |
115 | * @consumer: The regulator consumer for the supply. This will be managed | |
116 | * by the bulk API. | |
e2ce4eaa LG |
117 | * |
118 | * The regulator APIs provide a series of regulator_bulk_() API calls as | |
119 | * a convenience to consumers which require multiple supplies. This | |
120 | * structure is used to manage data for these calls. | |
121 | */ | |
122 | struct regulator_bulk_data { | |
123 | const char *supply; | |
124 | struct regulator *consumer; | |
f21e0e81 | 125 | |
bff747c5 | 126 | /* private: Internal use */ |
f21e0e81 | 127 | int ret; |
e2ce4eaa LG |
128 | }; |
129 | ||
130 | #if defined(CONFIG_REGULATOR) | |
131 | ||
132 | /* regulator get and put */ | |
133 | struct regulator *__must_check regulator_get(struct device *dev, | |
134 | const char *id); | |
5ffbd136 MB |
135 | struct regulator *__must_check regulator_get_exclusive(struct device *dev, |
136 | const char *id); | |
e2ce4eaa LG |
137 | void regulator_put(struct regulator *regulator); |
138 | ||
139 | /* regulator output control and status */ | |
140 | int regulator_enable(struct regulator *regulator); | |
141 | int regulator_disable(struct regulator *regulator); | |
142 | int regulator_force_disable(struct regulator *regulator); | |
143 | int regulator_is_enabled(struct regulator *regulator); | |
da07ecd9 | 144 | int regulator_disable_deferred(struct regulator *regulator, int ms); |
e2ce4eaa LG |
145 | |
146 | int regulator_bulk_get(struct device *dev, int num_consumers, | |
147 | struct regulator_bulk_data *consumers); | |
148 | int regulator_bulk_enable(int num_consumers, | |
149 | struct regulator_bulk_data *consumers); | |
150 | int regulator_bulk_disable(int num_consumers, | |
151 | struct regulator_bulk_data *consumers); | |
e1de2f42 DK |
152 | int regulator_bulk_force_disable(int num_consumers, |
153 | struct regulator_bulk_data *consumers); | |
e2ce4eaa LG |
154 | void regulator_bulk_free(int num_consumers, |
155 | struct regulator_bulk_data *consumers); | |
156 | ||
4367cfdc DB |
157 | int regulator_count_voltages(struct regulator *regulator); |
158 | int regulator_list_voltage(struct regulator *regulator, unsigned selector); | |
a7a1ad90 MB |
159 | int regulator_is_supported_voltage(struct regulator *regulator, |
160 | int min_uV, int max_uV); | |
e2ce4eaa | 161 | int regulator_set_voltage(struct regulator *regulator, int min_uV, int max_uV); |
88cd222b LW |
162 | int regulator_set_voltage_time(struct regulator *regulator, |
163 | int old_uV, int new_uV); | |
e2ce4eaa | 164 | int regulator_get_voltage(struct regulator *regulator); |
606a2562 | 165 | int regulator_sync_voltage(struct regulator *regulator); |
e2ce4eaa LG |
166 | int regulator_set_current_limit(struct regulator *regulator, |
167 | int min_uA, int max_uA); | |
168 | int regulator_get_current_limit(struct regulator *regulator); | |
169 | ||
170 | int regulator_set_mode(struct regulator *regulator, unsigned int mode); | |
171 | unsigned int regulator_get_mode(struct regulator *regulator); | |
172 | int regulator_set_optimum_mode(struct regulator *regulator, int load_uA); | |
173 | ||
174 | /* regulator notifier block */ | |
175 | int regulator_register_notifier(struct regulator *regulator, | |
176 | struct notifier_block *nb); | |
177 | int regulator_unregister_notifier(struct regulator *regulator, | |
178 | struct notifier_block *nb); | |
179 | ||
180 | /* driver data - core doesn't touch */ | |
181 | void *regulator_get_drvdata(struct regulator *regulator); | |
182 | void regulator_set_drvdata(struct regulator *regulator, void *data); | |
183 | ||
184 | #else | |
185 | ||
186 | /* | |
187 | * Make sure client drivers will still build on systems with no software | |
188 | * controllable voltage or current regulators. | |
189 | */ | |
190 | static inline struct regulator *__must_check regulator_get(struct device *dev, | |
191 | const char *id) | |
192 | { | |
193 | /* Nothing except the stubbed out regulator API should be | |
194 | * looking at the value except to check if it is an error | |
be1a50d4 JD |
195 | * value. Drivers are free to handle NULL specifically by |
196 | * skipping all regulator API calls, but they don't have to. | |
197 | * Drivers which don't, should make sure they properly handle | |
198 | * corner cases of the API, such as regulator_get_voltage() | |
199 | * returning 0. | |
e2ce4eaa | 200 | */ |
be1a50d4 | 201 | return NULL; |
e2ce4eaa LG |
202 | } |
203 | static inline void regulator_put(struct regulator *regulator) | |
204 | { | |
205 | } | |
206 | ||
207 | static inline int regulator_enable(struct regulator *regulator) | |
208 | { | |
209 | return 0; | |
210 | } | |
211 | ||
212 | static inline int regulator_disable(struct regulator *regulator) | |
213 | { | |
214 | return 0; | |
215 | } | |
216 | ||
935a5210 MH |
217 | static inline int regulator_force_disable(struct regulator *regulator) |
218 | { | |
219 | return 0; | |
220 | } | |
221 | ||
da07ecd9 MB |
222 | static inline int regulator_disable_deferred(struct regulator *regulator, |
223 | int ms) | |
224 | { | |
225 | return 0; | |
226 | } | |
227 | ||
e2ce4eaa LG |
228 | static inline int regulator_is_enabled(struct regulator *regulator) |
229 | { | |
230 | return 1; | |
231 | } | |
232 | ||
233 | static inline int regulator_bulk_get(struct device *dev, | |
234 | int num_consumers, | |
235 | struct regulator_bulk_data *consumers) | |
236 | { | |
237 | return 0; | |
238 | } | |
239 | ||
240 | static inline int regulator_bulk_enable(int num_consumers, | |
241 | struct regulator_bulk_data *consumers) | |
242 | { | |
243 | return 0; | |
244 | } | |
245 | ||
246 | static inline int regulator_bulk_disable(int num_consumers, | |
247 | struct regulator_bulk_data *consumers) | |
248 | { | |
249 | return 0; | |
250 | } | |
251 | ||
e1de2f42 DK |
252 | static inline int regulator_bulk_force_disable(int num_consumers, |
253 | struct regulator_bulk_data *consumers) | |
254 | { | |
255 | return 0; | |
256 | } | |
257 | ||
e2ce4eaa LG |
258 | static inline void regulator_bulk_free(int num_consumers, |
259 | struct regulator_bulk_data *consumers) | |
260 | { | |
261 | } | |
262 | ||
263 | static inline int regulator_set_voltage(struct regulator *regulator, | |
264 | int min_uV, int max_uV) | |
265 | { | |
266 | return 0; | |
267 | } | |
268 | ||
269 | static inline int regulator_get_voltage(struct regulator *regulator) | |
270 | { | |
271 | return 0; | |
272 | } | |
273 | ||
274 | static inline int regulator_set_current_limit(struct regulator *regulator, | |
275 | int min_uA, int max_uA) | |
276 | { | |
277 | return 0; | |
278 | } | |
279 | ||
280 | static inline int regulator_get_current_limit(struct regulator *regulator) | |
281 | { | |
282 | return 0; | |
283 | } | |
284 | ||
285 | static inline int regulator_set_mode(struct regulator *regulator, | |
286 | unsigned int mode) | |
287 | { | |
288 | return 0; | |
289 | } | |
290 | ||
291 | static inline unsigned int regulator_get_mode(struct regulator *regulator) | |
292 | { | |
293 | return REGULATOR_MODE_NORMAL; | |
294 | } | |
295 | ||
296 | static inline int regulator_set_optimum_mode(struct regulator *regulator, | |
297 | int load_uA) | |
298 | { | |
299 | return REGULATOR_MODE_NORMAL; | |
300 | } | |
301 | ||
302 | static inline int regulator_register_notifier(struct regulator *regulator, | |
303 | struct notifier_block *nb) | |
304 | { | |
305 | return 0; | |
306 | } | |
307 | ||
308 | static inline int regulator_unregister_notifier(struct regulator *regulator, | |
309 | struct notifier_block *nb) | |
310 | { | |
311 | return 0; | |
312 | } | |
313 | ||
314 | static inline void *regulator_get_drvdata(struct regulator *regulator) | |
315 | { | |
316 | return NULL; | |
317 | } | |
318 | ||
319 | static inline void regulator_set_drvdata(struct regulator *regulator, | |
320 | void *data) | |
321 | { | |
322 | } | |
323 | ||
324 | #endif | |
325 | ||
326 | #endif |