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_ramp_delay: Set the ramp delay for the regulator. The driver should
73 * select ramp delay equal to or less than(closest) ramp_delay.
74 * @set_voltage_time_sel: Time taken for the regulator voltage output voltage
75 * to stabilise after being set to a new value, in microseconds.
76 * The function provides the from and to voltage selector, the
77 * function should return the worst case.
79 * @set_suspend_voltage: Set the voltage for the regulator when the system
81 * @set_suspend_enable: Mark the regulator as enabled when the system is
83 * @set_suspend_disable: Mark the regulator as disabled when the system is
85 * @set_suspend_mode: Set the operating mode for the regulator when the
86 * system is suspended.
88 * This struct describes regulator operations which can be implemented by
89 * regulator chip drivers.
91 struct regulator_ops {
93 /* enumerate supported voltages */
94 int (*list_voltage) (struct regulator_dev *, unsigned selector);
96 /* get/set regulator voltage */
97 int (*set_voltage) (struct regulator_dev *, int min_uV, int max_uV,
99 int (*map_voltage)(struct regulator_dev *, int min_uV, int max_uV);
100 int (*set_voltage_sel) (struct regulator_dev *, unsigned selector);
101 int (*get_voltage) (struct regulator_dev *);
102 int (*get_voltage_sel) (struct regulator_dev *);
104 /* get/set regulator current */
105 int (*set_current_limit) (struct regulator_dev *,
106 int min_uA, int max_uA);
107 int (*get_current_limit) (struct regulator_dev *);
109 /* enable/disable regulator */
110 int (*enable) (struct regulator_dev *);
111 int (*disable) (struct regulator_dev *);
112 int (*is_enabled) (struct regulator_dev *);
114 /* get/set regulator operating mode (defined in consumer.h) */
115 int (*set_mode) (struct regulator_dev *, unsigned int mode);
116 unsigned int (*get_mode) (struct regulator_dev *);
118 /* Time taken to enable or set voltage on the regulator */
119 int (*enable_time) (struct regulator_dev *);
120 int (*set_ramp_delay) (struct regulator_dev *, int ramp_delay);
121 int (*set_voltage_time_sel) (struct regulator_dev *,
122 unsigned int old_selector,
123 unsigned int new_selector);
125 /* report regulator status ... most other accessors report
126 * control inputs, this reports results of combining inputs
127 * from Linux (and other sources) with the actual load.
128 * returns REGULATOR_STATUS_* or negative errno.
130 int (*get_status)(struct regulator_dev *);
132 /* get most efficient regulator operating mode for load */
133 unsigned int (*get_optimum_mode) (struct regulator_dev *, int input_uV,
134 int output_uV, int load_uA);
136 /* the operations below are for configuration of regulator state when
137 * its parent PMIC enters a global STANDBY/HIBERNATE state */
139 /* set regulator suspend voltage */
140 int (*set_suspend_voltage) (struct regulator_dev *, int uV);
142 /* enable/disable regulator in suspend state */
143 int (*set_suspend_enable) (struct regulator_dev *);
144 int (*set_suspend_disable) (struct regulator_dev *);
146 /* set regulator suspend operating mode (defined in consumer.h) */
147 int (*set_suspend_mode) (struct regulator_dev *, unsigned int mode);
151 * Regulators can either control voltage or current.
153 enum regulator_type {
159 * struct regulator_desc - Static regulator descriptor
161 * Each regulator registered with the core is described with a
162 * structure of this type and a struct regulator_config. This
163 * structure contains the non-varying parts of the regulator
166 * @name: Identifying name for the regulator.
167 * @supply_name: Identifying the regulator supply
168 * @id: Numerical identifier for the regulator.
169 * @ops: Regulator operations table.
170 * @irq: Interrupt number for the regulator.
171 * @type: Indicates if the regulator is a voltage or current regulator.
172 * @owner: Module providing the regulator, used for refcounting.
174 * @n_voltages: Number of selectors available for ops.list_voltage().
176 * @min_uV: Voltage given by the lowest selector (if linear mapping)
177 * @uV_step: Voltage increase with each selector (if linear mapping)
178 * @ramp_delay: Time to settle down after voltage change (unit: uV/us)
179 * @volt_table: Voltage mapping table (if table based mapping)
181 * @vsel_reg: Register for selector when using regulator_regmap_X_voltage_
182 * @vsel_mask: Mask for register bitfield used for selector
183 * @enable_reg: Register for control when using regmap enable/disable ops
184 * @enable_mask: Mask for control when using regmap enable/disable ops
186 * @enable_time: Time taken for initial enable of regulator (in uS).
188 struct regulator_desc {
190 const char *supply_name;
193 struct regulator_ops *ops;
195 enum regulator_type type;
196 struct module *owner;
199 unsigned int uV_step;
200 unsigned int ramp_delay;
202 const unsigned int *volt_table;
204 unsigned int vsel_reg;
205 unsigned int vsel_mask;
206 unsigned int enable_reg;
207 unsigned int enable_mask;
209 unsigned int enable_time;
213 * struct regulator_config - Dynamic regulator descriptor
215 * Each regulator registered with the core is described with a
216 * structure of this type and a struct regulator_desc. This structure
217 * contains the runtime variable parts of the regulator description.
219 * @dev: struct device for the regulator
220 * @init_data: platform provided init data, passed through by driver
221 * @driver_data: private regulator data
222 * @of_node: OpenFirmware node to parse for device tree bindings (may be
224 * @regmap: regmap to use for core regmap helpers
225 * @ena_gpio: GPIO controlling regulator enable.
226 * @ena_gpio_invert: Sense for GPIO enable control.
227 * @ena_gpio_flags: Flags to use when calling gpio_request_one()
229 struct regulator_config {
231 const struct regulator_init_data *init_data;
233 struct device_node *of_node;
234 struct regmap *regmap;
237 unsigned int ena_gpio_invert:1;
238 unsigned int ena_gpio_flags;
242 * struct regulator_dev
244 * Voltage / Current regulator class device. One for each
247 * This should *not* be used directly by anything except the regulator
248 * core and notification injection (which should take the mutex and do
249 * no other direct access).
251 struct regulator_dev {
252 const struct regulator_desc *desc;
257 /* lists we belong to */
258 struct list_head list; /* list of all regulators */
261 struct list_head consumer_list; /* consumers we supply */
263 struct blocking_notifier_head notifier;
264 struct mutex mutex; /* consumer lock */
265 struct module *owner;
267 struct regulation_constraints *constraints;
268 struct regulator *supply; /* for tree */
269 struct regmap *regmap;
271 struct delayed_work disable_work;
272 int deferred_disables;
274 void *reg_data; /* regulator_dev data */
276 struct dentry *debugfs;
279 unsigned int ena_gpio_invert:1;
280 unsigned int ena_gpio_state:1;
283 struct regulator_dev *
284 regulator_register(const struct regulator_desc *regulator_desc,
285 const struct regulator_config *config);
286 void regulator_unregister(struct regulator_dev *rdev);
288 int regulator_notifier_call_chain(struct regulator_dev *rdev,
289 unsigned long event, void *data);
291 void *rdev_get_drvdata(struct regulator_dev *rdev);
292 struct device *rdev_get_dev(struct regulator_dev *rdev);
293 int rdev_get_id(struct regulator_dev *rdev);
295 int regulator_mode_to_status(unsigned int);
297 int regulator_list_voltage_linear(struct regulator_dev *rdev,
298 unsigned int selector);
299 int regulator_list_voltage_table(struct regulator_dev *rdev,
300 unsigned int selector);
301 int regulator_map_voltage_linear(struct regulator_dev *rdev,
302 int min_uV, int max_uV);
303 int regulator_map_voltage_iterate(struct regulator_dev *rdev,
304 int min_uV, int max_uV);
305 int regulator_get_voltage_sel_regmap(struct regulator_dev *rdev);
306 int regulator_set_voltage_sel_regmap(struct regulator_dev *rdev, unsigned sel);
307 int regulator_is_enabled_regmap(struct regulator_dev *rdev);
308 int regulator_enable_regmap(struct regulator_dev *rdev);
309 int regulator_disable_regmap(struct regulator_dev *rdev);
310 int regulator_set_voltage_time_sel(struct regulator_dev *rdev,
311 unsigned int old_selector,
312 unsigned int new_selector);
314 void *regulator_get_init_drvdata(struct regulator_init_data *reg_init_data);