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;
26 enum regulator_status {
29 REGULATOR_STATUS_ERROR,
30 /* fast/normal/idle/standby are flavors of "on" */
31 REGULATOR_STATUS_FAST,
32 REGULATOR_STATUS_NORMAL,
33 REGULATOR_STATUS_IDLE,
34 REGULATOR_STATUS_STANDBY,
35 /* in case that any other status doesn't apply */
36 REGULATOR_STATUS_UNDEFINED,
40 * struct regulator_ops - regulator operations.
42 * @enable: Configure the regulator as enabled.
43 * @disable: Configure the regulator as disabled.
44 * @is_enabled: Return 1 if the regulator is enabled, 0 if not.
45 * May also return negative errno.
47 * @set_voltage: Set the voltage for the regulator within the range specified.
48 * The driver should select the voltage closest to min_uV.
49 * @set_voltage_sel: Set the voltage for the regulator using the specified
51 * @map_voltage: Convert a voltage into a selector
52 * @get_voltage: Return the currently configured voltage for the regulator.
53 * @get_voltage_sel: Return the currently configured voltage selector for the
55 * @list_voltage: Return one of the supported voltages, in microvolts; zero
56 * if the selector indicates a voltage that is unusable on this system;
57 * or negative errno. Selectors range from zero to one less than
58 * regulator_desc.n_voltages. Voltages may be reported in any order.
60 * @set_current_limit: Configure a limit for a current-limited regulator.
61 * @get_current_limit: Get the configured limit for a current-limited regulator.
63 * @set_mode: Set the configured operating mode for the regulator.
64 * @get_mode: Get the configured operating mode for the regulator.
65 * @get_status: Return actual (not as-configured) status of regulator, as a
66 * REGULATOR_STATUS value (or negative errno)
67 * @get_optimum_mode: Get the most efficient operating mode for the regulator
68 * when running with the specified parameters.
70 * @enable_time: Time taken for the regulator voltage output voltage to
71 * stabilise after being enabled, in microseconds.
72 * @set_voltage_time_sel: Time taken for the regulator voltage output voltage
73 * to stabilise after being set to a new value, in microseconds.
74 * The function provides the from and to voltage selector, the
75 * function should return the worst case.
77 * @set_suspend_voltage: Set the voltage for the regulator when the system
79 * @set_suspend_enable: Mark the regulator as enabled when the system is
81 * @set_suspend_disable: Mark the regulator as disabled when the system is
83 * @set_suspend_mode: Set the operating mode for the regulator when the
84 * system is suspended.
86 * This struct describes regulator operations which can be implemented by
87 * regulator chip drivers.
89 struct regulator_ops {
91 /* enumerate supported voltages */
92 int (*list_voltage) (struct regulator_dev *, unsigned selector);
94 /* get/set regulator voltage */
95 int (*set_voltage) (struct regulator_dev *, int min_uV, int max_uV,
97 int (*map_voltage)(struct regulator_dev *, int min_uV, int max_uV);
98 int (*set_voltage_sel) (struct regulator_dev *, unsigned selector);
99 int (*get_voltage) (struct regulator_dev *);
100 int (*get_voltage_sel) (struct regulator_dev *);
102 /* get/set regulator current */
103 int (*set_current_limit) (struct regulator_dev *,
104 int min_uA, int max_uA);
105 int (*get_current_limit) (struct regulator_dev *);
107 /* enable/disable regulator */
108 int (*enable) (struct regulator_dev *);
109 int (*disable) (struct regulator_dev *);
110 int (*is_enabled) (struct regulator_dev *);
112 /* get/set regulator operating mode (defined in consumer.h) */
113 int (*set_mode) (struct regulator_dev *, unsigned int mode);
114 unsigned int (*get_mode) (struct regulator_dev *);
116 /* Time taken to enable or set voltage on the regulator */
117 int (*enable_time) (struct regulator_dev *);
118 int (*set_voltage_time_sel) (struct regulator_dev *,
119 unsigned int old_selector,
120 unsigned int new_selector);
122 /* report regulator status ... most other accessors report
123 * control inputs, this reports results of combining inputs
124 * from Linux (and other sources) with the actual load.
125 * returns REGULATOR_STATUS_* or negative errno.
127 int (*get_status)(struct regulator_dev *);
129 /* get most efficient regulator operating mode for load */
130 unsigned int (*get_optimum_mode) (struct regulator_dev *, int input_uV,
131 int output_uV, int load_uA);
133 /* the operations below are for configuration of regulator state when
134 * its parent PMIC enters a global STANDBY/HIBERNATE state */
136 /* set regulator suspend voltage */
137 int (*set_suspend_voltage) (struct regulator_dev *, int uV);
139 /* enable/disable regulator in suspend state */
140 int (*set_suspend_enable) (struct regulator_dev *);
141 int (*set_suspend_disable) (struct regulator_dev *);
143 /* set regulator suspend operating mode (defined in consumer.h) */
144 int (*set_suspend_mode) (struct regulator_dev *, unsigned int mode);
148 * Regulators can either control voltage or current.
150 enum regulator_type {
156 * struct regulator_desc - Static regulator descriptor
158 * Each regulator registered with the core is described with a
159 * structure of this type and a struct regulator_config. This
160 * structure contains the non-varying parts of the regulator
163 * @name: Identifying name for the regulator.
164 * @supply_name: Identifying the regulator supply
165 * @id: Numerical identifier for the regulator.
166 * @ops: Regulator operations table.
167 * @irq: Interrupt number for the regulator.
168 * @type: Indicates if the regulator is a voltage or current regulator.
169 * @owner: Module providing the regulator, used for refcounting.
171 * @n_voltages: Number of selectors available for ops.list_voltage().
173 * @min_uV: Voltage given by the lowest selector (if linear mapping)
174 * @uV_step: Voltage increase with each selector (if linear mapping)
175 * @volt_table: Voltage mapping table (if table based mapping)
177 * @vsel_reg: Register for selector when using regulator_regmap_X_voltage_
178 * @vsel_mask: Mask for register bitfield used for selector
179 * @enable_reg: Register for control when using regmap enable/disable ops
180 * @enable_mask: Mask for control when using regmap enable/disable ops
182 struct regulator_desc {
184 const char *supply_name;
187 struct regulator_ops *ops;
189 enum regulator_type type;
190 struct module *owner;
193 unsigned int uV_step;
195 const unsigned int *volt_table;
197 unsigned int vsel_reg;
198 unsigned int vsel_mask;
199 unsigned int enable_reg;
200 unsigned int enable_mask;
204 * struct regulator_config - Dynamic regulator descriptor
206 * Each regulator registered with the core is described with a
207 * structure of this type and a struct regulator_desc. This structure
208 * contains the runtime variable parts of the regulator description.
210 * @dev: struct device for the regulator
211 * @init_data: platform provided init data, passed through by driver
212 * @driver_data: private regulator data
213 * @of_node: OpenFirmware node to parse for device tree bindings (may be
215 * @regmap: regmap to use for core regmap helpers
217 struct regulator_config {
219 const struct regulator_init_data *init_data;
221 struct device_node *of_node;
222 struct regmap *regmap;
226 * struct regulator_dev
228 * Voltage / Current regulator class device. One for each
231 * This should *not* be used directly by anything except the regulator
232 * core and notification injection (which should take the mutex and do
233 * no other direct access).
235 struct regulator_dev {
236 const struct regulator_desc *desc;
241 /* lists we belong to */
242 struct list_head list; /* list of all regulators */
245 struct list_head consumer_list; /* consumers we supply */
247 struct blocking_notifier_head notifier;
248 struct mutex mutex; /* consumer lock */
249 struct module *owner;
251 struct regulation_constraints *constraints;
252 struct regulator *supply; /* for tree */
253 struct regmap *regmap;
255 struct delayed_work disable_work;
256 int deferred_disables;
258 void *reg_data; /* regulator_dev data */
260 struct dentry *debugfs;
263 struct regulator_dev *
264 regulator_register(const struct regulator_desc *regulator_desc,
265 const struct regulator_config *config);
266 void regulator_unregister(struct regulator_dev *rdev);
268 int regulator_notifier_call_chain(struct regulator_dev *rdev,
269 unsigned long event, void *data);
271 void *rdev_get_drvdata(struct regulator_dev *rdev);
272 struct device *rdev_get_dev(struct regulator_dev *rdev);
273 int rdev_get_id(struct regulator_dev *rdev);
275 int regulator_mode_to_status(unsigned int);
277 int regulator_list_voltage_linear(struct regulator_dev *rdev,
278 unsigned int selector);
279 int regulator_list_voltage_table(struct regulator_dev *rdev,
280 unsigned int selector);
281 int regulator_map_voltage_linear(struct regulator_dev *rdev,
282 int min_uV, int max_uV);
283 int regulator_map_voltage_iterate(struct regulator_dev *rdev,
284 int min_uV, int max_uV);
285 int regulator_get_voltage_sel_regmap(struct regulator_dev *rdev);
286 int regulator_set_voltage_sel_regmap(struct regulator_dev *rdev, unsigned sel);
287 int regulator_is_enabled_regmap(struct regulator_dev *rdev);
288 int regulator_enable_regmap(struct regulator_dev *rdev);
289 int regulator_disable_regmap(struct regulator_dev *rdev);
291 void *regulator_get_init_drvdata(struct regulator_init_data *reg_init_data);