1 /* SPDX-License-Identifier: GPL-2.0-only */
3 * consumer.h -- SoC Regulator consumer support.
5 * Copyright (C) 2007, 2008 Wolfson Microelectronics PLC.
7 * Author: Liam Girdwood <lrg@slimlogic.co.uk>
9 * Regulator Consumer Interface.
11 * A Power Management Regulator framework for SoC based devices.
13 * o Voltage and current level control.
14 * o Operating mode control.
16 * o sysfs entries for showing client devices and status
18 * EXPERIMENTAL FEATURES:
19 * Dynamic Regulator operating Mode Switching (DRMS) - allows regulators
20 * to use most efficient operating mode depending upon voltage and load and
21 * is transparent to client drivers.
23 * e.g. Devices x,y,z share regulator r. Device x and y draw 20mA each during
24 * IO and 1mA at idle. Device z draws 100mA when under load and 5mA when
25 * idling. Regulator r has > 90% efficiency in NORMAL mode at loads > 100mA
26 * but this drops rapidly to 60% when below 100mA. Regulator r has > 90%
27 * efficiency in IDLE mode at loads < 10mA. Thus regulator r will operate
28 * in normal mode for loads > 10mA and in IDLE mode for load <= 10mA.
31 #ifndef __LINUX_REGULATOR_CONSUMER_H_
32 #define __LINUX_REGULATOR_CONSUMER_H_
34 #include <linux/err.h>
35 #include <linux/suspend.h>
36 #include <regulator/regulator.h>
39 struct notifier_block;
44 * Regulator operating modes.
46 * Regulators can run in a variety of different operating modes depending on
47 * output load. This allows further system power savings by selecting the
48 * best (and most efficient) regulator mode for a desired load.
50 * Most drivers will only care about NORMAL. The modes below are generic and
51 * will probably not match the naming convention of your regulator data sheet
52 * but should match the use cases in the datasheet.
54 * In order of power efficiency (least efficient at top).
57 * FAST Regulator can handle fast changes in it's load.
58 * e.g. useful in CPU voltage & frequency scaling where
59 * load can quickly increase with CPU frequency increases.
61 * NORMAL Normal regulator power supply mode. Most drivers will
64 * IDLE Regulator runs in a more efficient mode for light
65 * loads. Can be used for devices that have a low power
66 * requirement during periods of inactivity. This mode
67 * may be more noisy than NORMAL and may not be able
68 * to handle fast load switching.
70 * STANDBY Regulator runs in the most efficient mode for very
71 * light loads. Can be used by devices when they are
72 * in a sleep/standby state. This mode is likely to be
73 * the most noisy and may not be able to handle fast load
76 * NOTE: Most regulators will only support a subset of these modes. Some
77 * will only just support NORMAL.
79 * These modes can be OR'ed together to make up a mask of valid register modes.
82 #define REGULATOR_MODE_INVALID 0x0
83 #define REGULATOR_MODE_FAST 0x1
84 #define REGULATOR_MODE_NORMAL 0x2
85 #define REGULATOR_MODE_IDLE 0x4
86 #define REGULATOR_MODE_STANDBY 0x8
89 * Regulator errors that can be queried using regulator_get_error_flags
91 * UNDER_VOLTAGE Regulator output is under voltage.
92 * OVER_CURRENT Regulator output current is too high.
93 * REGULATION_OUT Regulator output is out of regulation.
94 * FAIL Regulator output has failed.
95 * OVER_TEMP Regulator over temp.
97 * NOTE: These errors can be OR'ed together.
100 #define REGULATOR_ERROR_UNDER_VOLTAGE BIT(1)
101 #define REGULATOR_ERROR_OVER_CURRENT BIT(2)
102 #define REGULATOR_ERROR_REGULATION_OUT BIT(3)
103 #define REGULATOR_ERROR_FAIL BIT(4)
104 #define REGULATOR_ERROR_OVER_TEMP BIT(5)
106 #define REGULATOR_ERROR_UNDER_VOLTAGE_WARN BIT(6)
107 #define REGULATOR_ERROR_OVER_CURRENT_WARN BIT(7)
108 #define REGULATOR_ERROR_OVER_VOLTAGE_WARN BIT(8)
109 #define REGULATOR_ERROR_OVER_TEMP_WARN BIT(9)
112 * struct pre_voltage_change_data - Data sent with PRE_VOLTAGE_CHANGE event
114 * @old_uV: Current voltage before change.
115 * @min_uV: Min voltage we'll change to.
116 * @max_uV: Max voltage we'll change to.
118 struct pre_voltage_change_data {
119 unsigned long old_uV;
120 unsigned long min_uV;
121 unsigned long max_uV;
127 * struct regulator_bulk_data - Data used for bulk regulator operations.
129 * @supply: The name of the supply. Initialised by the user before
130 * using the bulk regulator APIs.
131 * @init_load_uA: After getting the regulator, regulator_set_load() will be
132 * called with this load. Initialised by the user before
133 * using the bulk regulator APIs.
134 * @consumer: The regulator consumer for the supply. This will be managed
137 * The regulator APIs provide a series of regulator_bulk_() API calls as
138 * a convenience to consumers which require multiple supplies. This
139 * structure is used to manage data for these calls.
141 struct regulator_bulk_data {
144 struct regulator *consumer;
146 /* private: Internal use */
150 #if defined(CONFIG_REGULATOR)
152 /* regulator get and put */
153 struct regulator *__must_check regulator_get(struct device *dev,
155 struct regulator *__must_check devm_regulator_get(struct device *dev,
157 struct regulator *__must_check regulator_get_exclusive(struct device *dev,
159 struct regulator *__must_check devm_regulator_get_exclusive(struct device *dev,
161 struct regulator *__must_check regulator_get_optional(struct device *dev,
163 struct regulator *__must_check devm_regulator_get_optional(struct device *dev,
165 int devm_regulator_get_enable(struct device *dev, const char *id);
166 int devm_regulator_get_enable_optional(struct device *dev, const char *id);
167 int devm_regulator_get_enable_read_voltage(struct device *dev, const char *id);
168 void regulator_put(struct regulator *regulator);
169 void devm_regulator_put(struct regulator *regulator);
171 int regulator_register_supply_alias(struct device *dev, const char *id,
172 struct device *alias_dev,
173 const char *alias_id);
174 void regulator_unregister_supply_alias(struct device *dev, const char *id);
176 int regulator_bulk_register_supply_alias(struct device *dev,
177 const char *const *id,
178 struct device *alias_dev,
179 const char *const *alias_id,
181 void regulator_bulk_unregister_supply_alias(struct device *dev,
182 const char * const *id, int num_id);
184 int devm_regulator_register_supply_alias(struct device *dev, const char *id,
185 struct device *alias_dev,
186 const char *alias_id);
188 int devm_regulator_bulk_register_supply_alias(struct device *dev,
189 const char *const *id,
190 struct device *alias_dev,
191 const char *const *alias_id,
194 /* regulator output control and status */
195 int __must_check regulator_enable(struct regulator *regulator);
196 int regulator_disable(struct regulator *regulator);
197 int regulator_force_disable(struct regulator *regulator);
198 int regulator_is_enabled(struct regulator *regulator);
199 int regulator_disable_deferred(struct regulator *regulator, int ms);
201 int __must_check regulator_bulk_get(struct device *dev, int num_consumers,
202 struct regulator_bulk_data *consumers);
203 int __must_check of_regulator_bulk_get_all(struct device *dev, struct device_node *np,
204 struct regulator_bulk_data **consumers);
205 int __must_check devm_regulator_bulk_get(struct device *dev, int num_consumers,
206 struct regulator_bulk_data *consumers);
207 void devm_regulator_bulk_put(struct regulator_bulk_data *consumers);
208 int __must_check devm_regulator_bulk_get_exclusive(struct device *dev, int num_consumers,
209 struct regulator_bulk_data *consumers);
210 int __must_check devm_regulator_bulk_get_const(
211 struct device *dev, int num_consumers,
212 const struct regulator_bulk_data *in_consumers,
213 struct regulator_bulk_data **out_consumers);
214 int __must_check regulator_bulk_enable(int num_consumers,
215 struct regulator_bulk_data *consumers);
216 int devm_regulator_bulk_get_enable(struct device *dev, int num_consumers,
217 const char * const *id);
218 int regulator_bulk_disable(int num_consumers,
219 struct regulator_bulk_data *consumers);
220 int regulator_bulk_force_disable(int num_consumers,
221 struct regulator_bulk_data *consumers);
222 void regulator_bulk_free(int num_consumers,
223 struct regulator_bulk_data *consumers);
225 int regulator_count_voltages(struct regulator *regulator);
226 int regulator_list_voltage(struct regulator *regulator, unsigned selector);
227 int regulator_is_supported_voltage(struct regulator *regulator,
228 int min_uV, int max_uV);
229 unsigned int regulator_get_linear_step(struct regulator *regulator);
230 int regulator_set_voltage(struct regulator *regulator, int min_uV, int max_uV);
231 int regulator_set_voltage_time(struct regulator *regulator,
232 int old_uV, int new_uV);
233 int regulator_get_voltage(struct regulator *regulator);
234 int regulator_sync_voltage(struct regulator *regulator);
235 int regulator_set_current_limit(struct regulator *regulator,
236 int min_uA, int max_uA);
237 int regulator_get_current_limit(struct regulator *regulator);
239 int regulator_set_mode(struct regulator *regulator, unsigned int mode);
240 unsigned int regulator_get_mode(struct regulator *regulator);
241 int regulator_get_error_flags(struct regulator *regulator,
242 unsigned int *flags);
243 int regulator_set_load(struct regulator *regulator, int load_uA);
245 int regulator_allow_bypass(struct regulator *regulator, bool allow);
247 struct regmap *regulator_get_regmap(struct regulator *regulator);
248 int regulator_get_hardware_vsel_register(struct regulator *regulator,
250 unsigned *vsel_mask);
251 int regulator_list_hardware_vsel(struct regulator *regulator,
254 /* regulator notifier block */
255 int regulator_register_notifier(struct regulator *regulator,
256 struct notifier_block *nb);
257 int devm_regulator_register_notifier(struct regulator *regulator,
258 struct notifier_block *nb);
259 int regulator_unregister_notifier(struct regulator *regulator,
260 struct notifier_block *nb);
261 void devm_regulator_unregister_notifier(struct regulator *regulator,
262 struct notifier_block *nb);
264 /* regulator suspend */
265 int regulator_suspend_enable(struct regulator_dev *rdev,
266 suspend_state_t state);
267 int regulator_suspend_disable(struct regulator_dev *rdev,
268 suspend_state_t state);
269 int regulator_set_suspend_voltage(struct regulator *regulator, int min_uV,
270 int max_uV, suspend_state_t state);
272 /* driver data - core doesn't touch */
273 void *regulator_get_drvdata(struct regulator *regulator);
274 void regulator_set_drvdata(struct regulator *regulator, void *data);
278 void regulator_bulk_set_supply_names(struct regulator_bulk_data *consumers,
279 const char *const *supply_names,
280 unsigned int num_supplies);
282 bool regulator_is_equal(struct regulator *reg1, struct regulator *reg2);
287 * Make sure client drivers will still build on systems with no software
288 * controllable voltage or current regulators.
290 static inline struct regulator *__must_check regulator_get(struct device *dev,
293 /* Nothing except the stubbed out regulator API should be
294 * looking at the value except to check if it is an error
295 * value. Drivers are free to handle NULL specifically by
296 * skipping all regulator API calls, but they don't have to.
297 * Drivers which don't, should make sure they properly handle
298 * corner cases of the API, such as regulator_get_voltage()
304 static inline struct regulator *__must_check
305 devm_regulator_get(struct device *dev, const char *id)
310 static inline struct regulator *__must_check
311 regulator_get_exclusive(struct device *dev, const char *id)
313 return ERR_PTR(-ENODEV);
316 static inline struct regulator *__must_check
317 devm_regulator_get_exclusive(struct device *dev, const char *id)
319 return ERR_PTR(-ENODEV);
322 static inline int devm_regulator_get_enable(struct device *dev, const char *id)
327 static inline int devm_regulator_get_enable_optional(struct device *dev,
333 static inline int devm_regulator_get_enable_read_voltage(struct device *dev,
339 static inline struct regulator *__must_check
340 regulator_get_optional(struct device *dev, const char *id)
342 return ERR_PTR(-ENODEV);
346 static inline struct regulator *__must_check
347 devm_regulator_get_optional(struct device *dev, const char *id)
349 return ERR_PTR(-ENODEV);
352 static inline void regulator_put(struct regulator *regulator)
356 static inline void devm_regulator_put(struct regulator *regulator)
360 static inline void devm_regulator_bulk_put(struct regulator_bulk_data *consumers)
364 static inline int regulator_register_supply_alias(struct device *dev,
366 struct device *alias_dev,
367 const char *alias_id)
372 static inline void regulator_unregister_supply_alias(struct device *dev,
377 static inline int regulator_bulk_register_supply_alias(struct device *dev,
378 const char *const *id,
379 struct device *alias_dev,
380 const char * const *alias_id,
386 static inline void regulator_bulk_unregister_supply_alias(struct device *dev,
387 const char * const *id,
392 static inline int devm_regulator_register_supply_alias(struct device *dev,
394 struct device *alias_dev,
395 const char *alias_id)
400 static inline int devm_regulator_bulk_register_supply_alias(struct device *dev,
401 const char *const *id,
402 struct device *alias_dev,
403 const char *const *alias_id,
409 static inline int regulator_enable(struct regulator *regulator)
414 static inline int regulator_disable(struct regulator *regulator)
419 static inline int regulator_force_disable(struct regulator *regulator)
424 static inline int regulator_disable_deferred(struct regulator *regulator,
430 static inline int regulator_is_enabled(struct regulator *regulator)
435 static inline int regulator_bulk_get(struct device *dev,
437 struct regulator_bulk_data *consumers)
442 static inline int devm_regulator_bulk_get(struct device *dev, int num_consumers,
443 struct regulator_bulk_data *consumers)
448 static inline int of_regulator_bulk_get_all(struct device *dev, struct device_node *np,
449 struct regulator_bulk_data **consumers)
454 static inline int regulator_bulk_enable(int num_consumers,
455 struct regulator_bulk_data *consumers)
460 static inline int devm_regulator_bulk_get_enable(struct device *dev,
462 const char * const *id)
467 static inline int regulator_bulk_disable(int num_consumers,
468 struct regulator_bulk_data *consumers)
473 static inline int regulator_bulk_force_disable(int num_consumers,
474 struct regulator_bulk_data *consumers)
479 static inline void regulator_bulk_free(int num_consumers,
480 struct regulator_bulk_data *consumers)
484 static inline int regulator_set_voltage(struct regulator *regulator,
485 int min_uV, int max_uV)
490 static inline int regulator_set_voltage_time(struct regulator *regulator,
491 int old_uV, int new_uV)
496 static inline int regulator_get_voltage(struct regulator *regulator)
501 static inline int regulator_sync_voltage(struct regulator *regulator)
506 static inline int regulator_is_supported_voltage(struct regulator *regulator,
507 int min_uV, int max_uV)
512 static inline unsigned int regulator_get_linear_step(struct regulator *regulator)
517 static inline int regulator_set_current_limit(struct regulator *regulator,
518 int min_uA, int max_uA)
523 static inline int regulator_get_current_limit(struct regulator *regulator)
528 static inline int regulator_set_mode(struct regulator *regulator,
534 static inline unsigned int regulator_get_mode(struct regulator *regulator)
536 return REGULATOR_MODE_NORMAL;
539 static inline int regulator_get_error_flags(struct regulator *regulator,
545 static inline int regulator_set_load(struct regulator *regulator, int load_uA)
550 static inline int regulator_allow_bypass(struct regulator *regulator,
556 static inline struct regmap *regulator_get_regmap(struct regulator *regulator)
558 return ERR_PTR(-EOPNOTSUPP);
561 static inline int regulator_get_hardware_vsel_register(struct regulator *regulator,
568 static inline int regulator_list_hardware_vsel(struct regulator *regulator,
574 static inline int regulator_register_notifier(struct regulator *regulator,
575 struct notifier_block *nb)
580 static inline int devm_regulator_register_notifier(struct regulator *regulator,
581 struct notifier_block *nb)
586 static inline int regulator_unregister_notifier(struct regulator *regulator,
587 struct notifier_block *nb)
592 static inline int devm_regulator_unregister_notifier(struct regulator *regulator,
593 struct notifier_block *nb)
598 static inline int regulator_suspend_enable(struct regulator_dev *rdev,
599 suspend_state_t state)
604 static inline int regulator_suspend_disable(struct regulator_dev *rdev,
605 suspend_state_t state)
610 static inline int regulator_set_suspend_voltage(struct regulator *regulator,
611 int min_uV, int max_uV,
612 suspend_state_t state)
617 static inline void *regulator_get_drvdata(struct regulator *regulator)
622 static inline void regulator_set_drvdata(struct regulator *regulator,
627 static inline int regulator_count_voltages(struct regulator *regulator)
632 static inline int regulator_list_voltage(struct regulator *regulator, unsigned selector)
638 regulator_bulk_set_supply_names(struct regulator_bulk_data *consumers,
639 const char *const *supply_names,
640 unsigned int num_supplies)
645 regulator_is_equal(struct regulator *reg1, struct regulator *reg2)
651 static inline int regulator_set_voltage_triplet(struct regulator *regulator,
652 int min_uV, int target_uV,
655 if (regulator_set_voltage(regulator, target_uV, max_uV) == 0)
658 return regulator_set_voltage(regulator, min_uV, max_uV);
661 static inline int regulator_set_voltage_tol(struct regulator *regulator,
662 int new_uV, int tol_uV)
664 if (regulator_set_voltage(regulator, new_uV, new_uV + tol_uV) == 0)
667 return regulator_set_voltage(regulator,
668 new_uV - tol_uV, new_uV + tol_uV);
671 static inline int regulator_is_supported_voltage_tol(struct regulator *regulator,
672 int target_uV, int tol_uV)
674 return regulator_is_supported_voltage(regulator,