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_init_data;
25 struct regulator_enable_gpio;
27 enum regulator_status {
30 REGULATOR_STATUS_ERROR,
31 /* fast/normal/idle/standby are flavors of "on" */
32 REGULATOR_STATUS_FAST,
33 REGULATOR_STATUS_NORMAL,
34 REGULATOR_STATUS_IDLE,
35 REGULATOR_STATUS_STANDBY,
36 /* The regulator is enabled but not regulating */
37 REGULATOR_STATUS_BYPASS,
38 /* in case that any other status doesn't apply */
39 REGULATOR_STATUS_UNDEFINED,
43 * struct regulator_linear_range - specify linear voltage ranges
45 * Specify a range of voltages for regulator_map_linar_range() and
46 * regulator_list_linear_range().
48 * @min_uV: Lowest voltage in range
49 * @min_sel: Lowest selector for range
50 * @max_sel: Highest selector for range
53 struct regulator_linear_range {
60 /* Initialize struct regulator_linear_range */
61 #define REGULATOR_LINEAR_RANGE(_min_uV, _min_sel, _max_sel, _step_uV) \
64 .min_sel = _min_sel, \
65 .max_sel = _max_sel, \
66 .uV_step = _step_uV, \
70 * struct regulator_ops - regulator operations.
72 * @enable: Configure the regulator as enabled.
73 * @disable: Configure the regulator as disabled.
74 * @is_enabled: Return 1 if the regulator is enabled, 0 if not.
75 * May also return negative errno.
77 * @set_voltage: Set the voltage for the regulator within the range specified.
78 * The driver should select the voltage closest to min_uV.
79 * @set_voltage_sel: Set the voltage for the regulator using the specified
81 * @map_voltage: Convert a voltage into a selector
82 * @get_voltage: Return the currently configured voltage for the regulator.
83 * @get_voltage_sel: Return the currently configured voltage selector for the
85 * @list_voltage: Return one of the supported voltages, in microvolts; zero
86 * if the selector indicates a voltage that is unusable on this system;
87 * or negative errno. Selectors range from zero to one less than
88 * regulator_desc.n_voltages. Voltages may be reported in any order.
90 * @set_current_limit: Configure a limit for a current-limited regulator.
91 * The driver should select the current closest to max_uA.
92 * @get_current_limit: Get the configured limit for a current-limited regulator.
94 * @set_mode: Set the configured operating mode for the regulator.
95 * @get_mode: Get the configured operating mode for the regulator.
96 * @get_status: Return actual (not as-configured) status of regulator, as a
97 * REGULATOR_STATUS value (or negative errno)
98 * @get_optimum_mode: Get the most efficient operating mode for the regulator
99 * when running with the specified parameters.
101 * @set_bypass: Set the regulator in bypass mode.
102 * @get_bypass: Get the regulator bypass mode state.
104 * @enable_time: Time taken for the regulator voltage output voltage to
105 * stabilise after being enabled, in microseconds.
106 * @set_ramp_delay: Set the ramp delay for the regulator. The driver should
107 * select ramp delay equal to or less than(closest) ramp_delay.
108 * @set_voltage_time_sel: Time taken for the regulator voltage output voltage
109 * to stabilise after being set to a new value, in microseconds.
110 * The function provides the from and to voltage selector, the
111 * function should return the worst case.
113 * @set_suspend_voltage: Set the voltage for the regulator when the system
115 * @set_suspend_enable: Mark the regulator as enabled when the system is
117 * @set_suspend_disable: Mark the regulator as disabled when the system is
119 * @set_suspend_mode: Set the operating mode for the regulator when the
120 * system is suspended.
122 * This struct describes regulator operations which can be implemented by
123 * regulator chip drivers.
125 struct regulator_ops {
127 /* enumerate supported voltages */
128 int (*list_voltage) (struct regulator_dev *, unsigned selector);
130 /* get/set regulator voltage */
131 int (*set_voltage) (struct regulator_dev *, int min_uV, int max_uV,
133 int (*map_voltage)(struct regulator_dev *, int min_uV, int max_uV);
134 int (*set_voltage_sel) (struct regulator_dev *, unsigned selector);
135 int (*get_voltage) (struct regulator_dev *);
136 int (*get_voltage_sel) (struct regulator_dev *);
138 /* get/set regulator current */
139 int (*set_current_limit) (struct regulator_dev *,
140 int min_uA, int max_uA);
141 int (*get_current_limit) (struct regulator_dev *);
143 /* enable/disable regulator */
144 int (*enable) (struct regulator_dev *);
145 int (*disable) (struct regulator_dev *);
146 int (*is_enabled) (struct regulator_dev *);
148 /* get/set regulator operating mode (defined in consumer.h) */
149 int (*set_mode) (struct regulator_dev *, unsigned int mode);
150 unsigned int (*get_mode) (struct regulator_dev *);
152 /* Time taken to enable or set voltage on the regulator */
153 int (*enable_time) (struct regulator_dev *);
154 int (*set_ramp_delay) (struct regulator_dev *, int ramp_delay);
155 int (*set_voltage_time_sel) (struct regulator_dev *,
156 unsigned int old_selector,
157 unsigned int new_selector);
159 /* report regulator status ... most other accessors report
160 * control inputs, this reports results of combining inputs
161 * from Linux (and other sources) with the actual load.
162 * returns REGULATOR_STATUS_* or negative errno.
164 int (*get_status)(struct regulator_dev *);
166 /* get most efficient regulator operating mode for load */
167 unsigned int (*get_optimum_mode) (struct regulator_dev *, int input_uV,
168 int output_uV, int load_uA);
170 /* control and report on bypass mode */
171 int (*set_bypass)(struct regulator_dev *dev, bool enable);
172 int (*get_bypass)(struct regulator_dev *dev, bool *enable);
174 /* the operations below are for configuration of regulator state when
175 * its parent PMIC enters a global STANDBY/HIBERNATE state */
177 /* set regulator suspend voltage */
178 int (*set_suspend_voltage) (struct regulator_dev *, int uV);
180 /* enable/disable regulator in suspend state */
181 int (*set_suspend_enable) (struct regulator_dev *);
182 int (*set_suspend_disable) (struct regulator_dev *);
184 /* set regulator suspend operating mode (defined in consumer.h) */
185 int (*set_suspend_mode) (struct regulator_dev *, unsigned int mode);
189 * Regulators can either control voltage or current.
191 enum regulator_type {
197 * struct regulator_desc - Static regulator descriptor
199 * Each regulator registered with the core is described with a
200 * structure of this type and a struct regulator_config. This
201 * structure contains the non-varying parts of the regulator
204 * @name: Identifying name for the regulator.
205 * @supply_name: Identifying the regulator supply
206 * @of_match: Name used to identify regulator in DT.
207 * @regulators_node: Name of node containing regulator definitions in DT.
208 * @id: Numerical identifier for the regulator.
209 * @ops: Regulator operations table.
210 * @irq: Interrupt number for the regulator.
211 * @type: Indicates if the regulator is a voltage or current regulator.
212 * @owner: Module providing the regulator, used for refcounting.
214 * @continuous_voltage_range: Indicates if the regulator can set any
215 * voltage within constrains range.
216 * @n_voltages: Number of selectors available for ops.list_voltage().
218 * @min_uV: Voltage given by the lowest selector (if linear mapping)
219 * @uV_step: Voltage increase with each selector (if linear mapping)
220 * @linear_min_sel: Minimal selector for starting linear mapping
221 * @fixed_uV: Fixed voltage of rails.
222 * @ramp_delay: Time to settle down after voltage change (unit: uV/us)
223 * @linear_ranges: A constant table of possible voltage ranges.
224 * @n_linear_ranges: Number of entries in the @linear_ranges table.
225 * @volt_table: Voltage mapping table (if table based mapping)
227 * @vsel_reg: Register for selector when using regulator_regmap_X_voltage_
228 * @vsel_mask: Mask for register bitfield used for selector
229 * @apply_reg: Register for initiate voltage change on the output when
230 * using regulator_set_voltage_sel_regmap
231 * @apply_bit: Register bitfield used for initiate voltage change on the
232 * output when using regulator_set_voltage_sel_regmap
233 * @enable_reg: Register for control when using regmap enable/disable ops
234 * @enable_mask: Mask for control when using regmap enable/disable ops
235 * @enable_val: Enabling value for control when using regmap enable/disable ops
236 * @disable_val: Disabling value for control when using regmap enable/disable ops
237 * @enable_is_inverted: A flag to indicate set enable_mask bits to disable
238 * when using regulator_enable_regmap and friends APIs.
239 * @bypass_reg: Register for control when using regmap set_bypass
240 * @bypass_mask: Mask for control when using regmap set_bypass
241 * @bypass_val_on: Enabling value for control when using regmap set_bypass
242 * @bypass_val_off: Disabling value for control when using regmap set_bypass
244 * @enable_time: Time taken for initial enable of regulator (in uS).
245 * @off_on_delay: guard time (in uS), before re-enabling a regulator
247 * @of_map_mode: Maps a hardware mode defined in a DeviceTree to a standard mode
249 struct regulator_desc {
251 const char *supply_name;
252 const char *of_match;
253 const char *regulators_node;
255 bool continuous_voltage_range;
257 const struct regulator_ops *ops;
259 enum regulator_type type;
260 struct module *owner;
263 unsigned int uV_step;
264 unsigned int linear_min_sel;
266 unsigned int ramp_delay;
268 const struct regulator_linear_range *linear_ranges;
271 const unsigned int *volt_table;
273 unsigned int vsel_reg;
274 unsigned int vsel_mask;
275 unsigned int apply_reg;
276 unsigned int apply_bit;
277 unsigned int enable_reg;
278 unsigned int enable_mask;
279 unsigned int enable_val;
280 unsigned int disable_val;
281 bool enable_is_inverted;
282 unsigned int bypass_reg;
283 unsigned int bypass_mask;
284 unsigned int bypass_val_on;
285 unsigned int bypass_val_off;
287 unsigned int enable_time;
289 unsigned int off_on_delay;
291 unsigned int (*of_map_mode)(unsigned int mode);
295 * struct regulator_config - Dynamic regulator descriptor
297 * Each regulator registered with the core is described with a
298 * structure of this type and a struct regulator_desc. This structure
299 * contains the runtime variable parts of the regulator description.
301 * @dev: struct device for the regulator
302 * @init_data: platform provided init data, passed through by driver
303 * @driver_data: private regulator data
304 * @of_node: OpenFirmware node to parse for device tree bindings (may be
306 * @regmap: regmap to use for core regmap helpers if dev_get_regulator() is
308 * @ena_gpio_initialized: GPIO controlling regulator enable was properly
309 * initialized, meaning that >= 0 is a valid gpio
310 * identifier and < 0 is a non existent gpio.
311 * @ena_gpio: GPIO controlling regulator enable.
312 * @ena_gpio_invert: Sense for GPIO enable control.
313 * @ena_gpio_flags: Flags to use when calling gpio_request_one()
315 struct regulator_config {
317 const struct regulator_init_data *init_data;
319 struct device_node *of_node;
320 struct regmap *regmap;
322 bool ena_gpio_initialized;
324 unsigned int ena_gpio_invert:1;
325 unsigned int ena_gpio_flags;
329 * struct regulator_dev
331 * Voltage / Current regulator class device. One for each
334 * This should *not* be used directly by anything except the regulator
335 * core and notification injection (which should take the mutex and do
336 * no other direct access).
338 struct regulator_dev {
339 const struct regulator_desc *desc;
345 /* lists we belong to */
346 struct list_head list; /* list of all regulators */
349 struct list_head consumer_list; /* consumers we supply */
351 struct blocking_notifier_head notifier;
352 struct mutex mutex; /* consumer lock */
353 struct module *owner;
355 struct regulation_constraints *constraints;
356 struct regulator *supply; /* for tree */
357 struct regmap *regmap;
359 struct delayed_work disable_work;
360 int deferred_disables;
362 void *reg_data; /* regulator_dev data */
364 struct dentry *debugfs;
366 struct regulator_enable_gpio *ena_pin;
367 unsigned int ena_gpio_state:1;
369 /* time when this regulator was disabled last time */
370 unsigned long last_off_jiffy;
373 struct regulator_dev *
374 regulator_register(const struct regulator_desc *regulator_desc,
375 const struct regulator_config *config);
376 struct regulator_dev *
377 devm_regulator_register(struct device *dev,
378 const struct regulator_desc *regulator_desc,
379 const struct regulator_config *config);
380 void regulator_unregister(struct regulator_dev *rdev);
381 void devm_regulator_unregister(struct device *dev, struct regulator_dev *rdev);
383 int regulator_notifier_call_chain(struct regulator_dev *rdev,
384 unsigned long event, void *data);
386 void *rdev_get_drvdata(struct regulator_dev *rdev);
387 struct device *rdev_get_dev(struct regulator_dev *rdev);
388 int rdev_get_id(struct regulator_dev *rdev);
390 int regulator_mode_to_status(unsigned int);
392 int regulator_list_voltage_linear(struct regulator_dev *rdev,
393 unsigned int selector);
394 int regulator_list_voltage_linear_range(struct regulator_dev *rdev,
395 unsigned int selector);
396 int regulator_list_voltage_table(struct regulator_dev *rdev,
397 unsigned int selector);
398 int regulator_map_voltage_linear(struct regulator_dev *rdev,
399 int min_uV, int max_uV);
400 int regulator_map_voltage_linear_range(struct regulator_dev *rdev,
401 int min_uV, int max_uV);
402 int regulator_map_voltage_iterate(struct regulator_dev *rdev,
403 int min_uV, int max_uV);
404 int regulator_map_voltage_ascend(struct regulator_dev *rdev,
405 int min_uV, int max_uV);
406 int regulator_get_voltage_sel_regmap(struct regulator_dev *rdev);
407 int regulator_set_voltage_sel_regmap(struct regulator_dev *rdev, unsigned sel);
408 int regulator_is_enabled_regmap(struct regulator_dev *rdev);
409 int regulator_enable_regmap(struct regulator_dev *rdev);
410 int regulator_disable_regmap(struct regulator_dev *rdev);
411 int regulator_set_voltage_time_sel(struct regulator_dev *rdev,
412 unsigned int old_selector,
413 unsigned int new_selector);
414 int regulator_set_bypass_regmap(struct regulator_dev *rdev, bool enable);
415 int regulator_get_bypass_regmap(struct regulator_dev *rdev, bool *enable);
417 void *regulator_get_init_drvdata(struct regulator_init_data *reg_init_data);