2 * driver.h -- SoC Regulator driver support.
4 * Copyright (C) 2007, 2008 Wolfson Microelectronics PLC.
6 * Author: Liam Girdwood <lrg@slimlogic.co.uk>
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.
12 * Regulator Driver Interface.
15 #ifndef __LINUX_REGULATOR_DRIVER_H_
16 #define __LINUX_REGULATOR_DRIVER_H_
18 #include <linux/device.h>
19 #include <linux/notifier.h>
20 #include <linux/regulator/consumer.h>
24 struct regulator_config;
25 struct regulator_init_data;
26 struct regulator_enable_gpio;
28 enum regulator_status {
31 REGULATOR_STATUS_ERROR,
32 /* fast/normal/idle/standby are flavors of "on" */
33 REGULATOR_STATUS_FAST,
34 REGULATOR_STATUS_NORMAL,
35 REGULATOR_STATUS_IDLE,
36 REGULATOR_STATUS_STANDBY,
37 /* The regulator is enabled but not regulating */
38 REGULATOR_STATUS_BYPASS,
39 /* in case that any other status doesn't apply */
40 REGULATOR_STATUS_UNDEFINED,
44 * struct regulator_linear_range - specify linear voltage ranges
46 * Specify a range of voltages for regulator_map_linar_range() and
47 * regulator_list_linear_range().
49 * @min_uV: Lowest voltage in range
50 * @min_sel: Lowest selector for range
51 * @max_sel: Highest selector for range
54 struct regulator_linear_range {
61 /* Initialize struct regulator_linear_range */
62 #define REGULATOR_LINEAR_RANGE(_min_uV, _min_sel, _max_sel, _step_uV) \
65 .min_sel = _min_sel, \
66 .max_sel = _max_sel, \
67 .uV_step = _step_uV, \
71 * struct regulator_ops - regulator operations.
73 * @enable: Configure the regulator as enabled.
74 * @disable: Configure the regulator as disabled.
75 * @is_enabled: Return 1 if the regulator is enabled, 0 if not.
76 * May also return negative errno.
78 * @set_voltage: Set the voltage for the regulator within the range specified.
79 * The driver should select the voltage closest to min_uV.
80 * @set_voltage_sel: Set the voltage for the regulator using the specified
82 * @map_voltage: Convert a voltage into a selector
83 * @get_voltage: Return the currently configured voltage for the regulator.
84 * @get_voltage_sel: Return the currently configured voltage selector for the
86 * @list_voltage: Return one of the supported voltages, in microvolts; zero
87 * if the selector indicates a voltage that is unusable on this system;
88 * or negative errno. Selectors range from zero to one less than
89 * regulator_desc.n_voltages. Voltages may be reported in any order.
91 * @set_current_limit: Configure a limit for a current-limited regulator.
92 * The driver should select the current closest to max_uA.
93 * @get_current_limit: Get the configured limit for a current-limited regulator.
94 * @set_input_current_limit: Configure an input limit.
96 * @set_active_discharge: Set active discharge enable/disable of regulators.
98 * @set_mode: Set the configured operating mode for the regulator.
99 * @get_mode: Get the configured operating mode for the regulator.
100 * @get_status: Return actual (not as-configured) status of regulator, as a
101 * REGULATOR_STATUS value (or negative errno)
102 * @get_optimum_mode: Get the most efficient operating mode for the regulator
103 * when running with the specified parameters.
104 * @set_load: Set the load for the regulator.
106 * @set_bypass: Set the regulator in bypass mode.
107 * @get_bypass: Get the regulator bypass mode state.
109 * @enable_time: Time taken for the regulator voltage output voltage to
110 * stabilise after being enabled, in microseconds.
111 * @set_ramp_delay: Set the ramp delay for the regulator. The driver should
112 * select ramp delay equal to or less than(closest) ramp_delay.
113 * @set_voltage_time_sel: Time taken for the regulator voltage output voltage
114 * to stabilise after being set to a new value, in microseconds.
115 * The function provides the from and to voltage selector, the
116 * function should return the worst case.
117 * @set_soft_start: Enable soft start for the regulator.
119 * @set_suspend_voltage: Set the voltage for the regulator when the system
121 * @set_suspend_enable: Mark the regulator as enabled when the system is
123 * @set_suspend_disable: Mark the regulator as disabled when the system is
125 * @set_suspend_mode: Set the operating mode for the regulator when the
126 * system is suspended.
128 * @set_pull_down: Configure the regulator to pull down when the regulator
131 * This struct describes regulator operations which can be implemented by
132 * regulator chip drivers.
134 struct regulator_ops {
136 /* enumerate supported voltages */
137 int (*list_voltage) (struct regulator_dev *, unsigned selector);
139 /* get/set regulator voltage */
140 int (*set_voltage) (struct regulator_dev *, int min_uV, int max_uV,
142 int (*map_voltage)(struct regulator_dev *, int min_uV, int max_uV);
143 int (*set_voltage_sel) (struct regulator_dev *, unsigned selector);
144 int (*get_voltage) (struct regulator_dev *);
145 int (*get_voltage_sel) (struct regulator_dev *);
147 /* get/set regulator current */
148 int (*set_current_limit) (struct regulator_dev *,
149 int min_uA, int max_uA);
150 int (*get_current_limit) (struct regulator_dev *);
152 int (*set_input_current_limit) (struct regulator_dev *, int lim_uA);
153 int (*set_over_current_protection) (struct regulator_dev *);
154 int (*set_active_discharge) (struct regulator_dev *, bool enable);
156 /* enable/disable regulator */
157 int (*enable) (struct regulator_dev *);
158 int (*disable) (struct regulator_dev *);
159 int (*is_enabled) (struct regulator_dev *);
161 /* get/set regulator operating mode (defined in consumer.h) */
162 int (*set_mode) (struct regulator_dev *, unsigned int mode);
163 unsigned int (*get_mode) (struct regulator_dev *);
165 /* Time taken to enable or set voltage on the regulator */
166 int (*enable_time) (struct regulator_dev *);
167 int (*set_ramp_delay) (struct regulator_dev *, int ramp_delay);
168 int (*set_voltage_time_sel) (struct regulator_dev *,
169 unsigned int old_selector,
170 unsigned int new_selector);
172 int (*set_soft_start) (struct regulator_dev *);
174 /* report regulator status ... most other accessors report
175 * control inputs, this reports results of combining inputs
176 * from Linux (and other sources) with the actual load.
177 * returns REGULATOR_STATUS_* or negative errno.
179 int (*get_status)(struct regulator_dev *);
181 /* get most efficient regulator operating mode for load */
182 unsigned int (*get_optimum_mode) (struct regulator_dev *, int input_uV,
183 int output_uV, int load_uA);
184 /* set the load on the regulator */
185 int (*set_load)(struct regulator_dev *, int load_uA);
187 /* control and report on bypass mode */
188 int (*set_bypass)(struct regulator_dev *dev, bool enable);
189 int (*get_bypass)(struct regulator_dev *dev, bool *enable);
191 /* the operations below are for configuration of regulator state when
192 * its parent PMIC enters a global STANDBY/HIBERNATE state */
194 /* set regulator suspend voltage */
195 int (*set_suspend_voltage) (struct regulator_dev *, int uV);
197 /* enable/disable regulator in suspend state */
198 int (*set_suspend_enable) (struct regulator_dev *);
199 int (*set_suspend_disable) (struct regulator_dev *);
201 /* set regulator suspend operating mode (defined in consumer.h) */
202 int (*set_suspend_mode) (struct regulator_dev *, unsigned int mode);
204 int (*set_pull_down) (struct regulator_dev *);
208 * Regulators can either control voltage or current.
210 enum regulator_type {
216 * struct regulator_desc - Static regulator descriptor
218 * Each regulator registered with the core is described with a
219 * structure of this type and a struct regulator_config. This
220 * structure contains the non-varying parts of the regulator
223 * @name: Identifying name for the regulator.
224 * @supply_name: Identifying the regulator supply
225 * @of_match: Name used to identify regulator in DT.
226 * @regulators_node: Name of node containing regulator definitions in DT.
227 * @of_parse_cb: Optional callback called only if of_match is present.
228 * Will be called for each regulator parsed from DT, during
230 * The regulator_config passed as argument to the callback will
231 * be a copy of config passed to regulator_register, valid only
232 * for this particular call. Callback may freely change the
233 * config but it cannot store it for later usage.
234 * Callback should return 0 on success or negative ERRNO
235 * indicating failure.
236 * @id: Numerical identifier for the regulator.
237 * @ops: Regulator operations table.
238 * @irq: Interrupt number for the regulator.
239 * @type: Indicates if the regulator is a voltage or current regulator.
240 * @owner: Module providing the regulator, used for refcounting.
242 * @continuous_voltage_range: Indicates if the regulator can set any
243 * voltage within constrains range.
244 * @n_voltages: Number of selectors available for ops.list_voltage().
246 * @min_uV: Voltage given by the lowest selector (if linear mapping)
247 * @uV_step: Voltage increase with each selector (if linear mapping)
248 * @linear_min_sel: Minimal selector for starting linear mapping
249 * @fixed_uV: Fixed voltage of rails.
250 * @ramp_delay: Time to settle down after voltage change (unit: uV/us)
251 * @min_dropout_uV: The minimum dropout voltage this regulator can handle
252 * @linear_ranges: A constant table of possible voltage ranges.
253 * @n_linear_ranges: Number of entries in the @linear_ranges table.
254 * @volt_table: Voltage mapping table (if table based mapping)
256 * @vsel_reg: Register for selector when using regulator_regmap_X_voltage_
257 * @vsel_mask: Mask for register bitfield used for selector
258 * @apply_reg: Register for initiate voltage change on the output when
259 * using regulator_set_voltage_sel_regmap
260 * @apply_bit: Register bitfield used for initiate voltage change on the
261 * output when using regulator_set_voltage_sel_regmap
262 * @enable_reg: Register for control when using regmap enable/disable ops
263 * @enable_mask: Mask for control when using regmap enable/disable ops
264 * @enable_val: Enabling value for control when using regmap enable/disable ops
265 * @disable_val: Disabling value for control when using regmap enable/disable ops
266 * @enable_is_inverted: A flag to indicate set enable_mask bits to disable
267 * when using regulator_enable_regmap and friends APIs.
268 * @bypass_reg: Register for control when using regmap set_bypass
269 * @bypass_mask: Mask for control when using regmap set_bypass
270 * @bypass_val_on: Enabling value for control when using regmap set_bypass
271 * @bypass_val_off: Disabling value for control when using regmap set_bypass
272 * @active_discharge_off: Enabling value for control when using regmap
273 * set_active_discharge
274 * @active_discharge_on: Disabling value for control when using regmap
275 * set_active_discharge
276 * @active_discharge_mask: Mask for control when using regmap
277 * set_active_discharge
278 * @active_discharge_reg: Register for control when using regmap
279 * set_active_discharge
281 * @enable_time: Time taken for initial enable of regulator (in uS).
282 * @off_on_delay: guard time (in uS), before re-enabling a regulator
284 * @of_map_mode: Maps a hardware mode defined in a DeviceTree to a standard mode
286 struct regulator_desc {
288 const char *supply_name;
289 const char *of_match;
290 const char *regulators_node;
291 int (*of_parse_cb)(struct device_node *,
292 const struct regulator_desc *,
293 struct regulator_config *);
295 bool continuous_voltage_range;
297 const struct regulator_ops *ops;
299 enum regulator_type type;
300 struct module *owner;
303 unsigned int uV_step;
304 unsigned int linear_min_sel;
306 unsigned int ramp_delay;
309 const struct regulator_linear_range *linear_ranges;
312 const unsigned int *volt_table;
314 unsigned int vsel_reg;
315 unsigned int vsel_mask;
316 unsigned int apply_reg;
317 unsigned int apply_bit;
318 unsigned int enable_reg;
319 unsigned int enable_mask;
320 unsigned int enable_val;
321 unsigned int disable_val;
322 bool enable_is_inverted;
323 unsigned int bypass_reg;
324 unsigned int bypass_mask;
325 unsigned int bypass_val_on;
326 unsigned int bypass_val_off;
327 unsigned int active_discharge_on;
328 unsigned int active_discharge_off;
329 unsigned int active_discharge_mask;
330 unsigned int active_discharge_reg;
332 unsigned int enable_time;
334 unsigned int off_on_delay;
336 unsigned int (*of_map_mode)(unsigned int mode);
340 * struct regulator_config - Dynamic regulator descriptor
342 * Each regulator registered with the core is described with a
343 * structure of this type and a struct regulator_desc. This structure
344 * contains the runtime variable parts of the regulator description.
346 * @dev: struct device for the regulator
347 * @init_data: platform provided init data, passed through by driver
348 * @driver_data: private regulator data
349 * @of_node: OpenFirmware node to parse for device tree bindings (may be
351 * @regmap: regmap to use for core regmap helpers if dev_get_regmap() is
353 * @ena_gpio_initialized: GPIO controlling regulator enable was properly
354 * initialized, meaning that >= 0 is a valid gpio
355 * identifier and < 0 is a non existent gpio.
356 * @ena_gpio: GPIO controlling regulator enable.
357 * @ena_gpio_invert: Sense for GPIO enable control.
358 * @ena_gpio_flags: Flags to use when calling gpio_request_one()
360 struct regulator_config {
362 const struct regulator_init_data *init_data;
364 struct device_node *of_node;
365 struct regmap *regmap;
367 bool ena_gpio_initialized;
369 unsigned int ena_gpio_invert:1;
370 unsigned int ena_gpio_flags;
374 * struct regulator_dev
376 * Voltage / Current regulator class device. One for each
379 * This should *not* be used directly by anything except the regulator
380 * core and notification injection (which should take the mutex and do
381 * no other direct access).
383 struct regulator_dev {
384 const struct regulator_desc *desc;
390 /* lists we belong to */
391 struct list_head list; /* list of all regulators */
394 struct list_head consumer_list; /* consumers we supply */
396 struct blocking_notifier_head notifier;
397 struct mutex mutex; /* consumer lock */
398 struct module *owner;
400 struct regulation_constraints *constraints;
401 struct regulator *supply; /* for tree */
402 const char *supply_name;
403 struct regmap *regmap;
405 struct delayed_work disable_work;
406 int deferred_disables;
408 void *reg_data; /* regulator_dev data */
410 struct dentry *debugfs;
412 struct regulator_enable_gpio *ena_pin;
413 unsigned int ena_gpio_state:1;
415 /* time when this regulator was disabled last time */
416 unsigned long last_off_jiffy;
419 struct regulator_dev *
420 regulator_register(const struct regulator_desc *regulator_desc,
421 const struct regulator_config *config);
422 struct regulator_dev *
423 devm_regulator_register(struct device *dev,
424 const struct regulator_desc *regulator_desc,
425 const struct regulator_config *config);
426 void regulator_unregister(struct regulator_dev *rdev);
427 void devm_regulator_unregister(struct device *dev, struct regulator_dev *rdev);
429 int regulator_notifier_call_chain(struct regulator_dev *rdev,
430 unsigned long event, void *data);
432 void *rdev_get_drvdata(struct regulator_dev *rdev);
433 struct device *rdev_get_dev(struct regulator_dev *rdev);
434 int rdev_get_id(struct regulator_dev *rdev);
436 int regulator_mode_to_status(unsigned int);
438 int regulator_list_voltage_linear(struct regulator_dev *rdev,
439 unsigned int selector);
440 int regulator_list_voltage_linear_range(struct regulator_dev *rdev,
441 unsigned int selector);
442 int regulator_list_voltage_table(struct regulator_dev *rdev,
443 unsigned int selector);
444 int regulator_map_voltage_linear(struct regulator_dev *rdev,
445 int min_uV, int max_uV);
446 int regulator_map_voltage_linear_range(struct regulator_dev *rdev,
447 int min_uV, int max_uV);
448 int regulator_map_voltage_iterate(struct regulator_dev *rdev,
449 int min_uV, int max_uV);
450 int regulator_map_voltage_ascend(struct regulator_dev *rdev,
451 int min_uV, int max_uV);
452 int regulator_get_voltage_sel_regmap(struct regulator_dev *rdev);
453 int regulator_set_voltage_sel_regmap(struct regulator_dev *rdev, unsigned sel);
454 int regulator_is_enabled_regmap(struct regulator_dev *rdev);
455 int regulator_enable_regmap(struct regulator_dev *rdev);
456 int regulator_disable_regmap(struct regulator_dev *rdev);
457 int regulator_set_voltage_time_sel(struct regulator_dev *rdev,
458 unsigned int old_selector,
459 unsigned int new_selector);
460 int regulator_set_bypass_regmap(struct regulator_dev *rdev, bool enable);
461 int regulator_get_bypass_regmap(struct regulator_dev *rdev, bool *enable);
463 int regulator_set_active_discharge_regmap(struct regulator_dev *rdev,
465 void *regulator_get_init_drvdata(struct regulator_init_data *reg_init_data);