2 * driver.h -- SoC Regulator driver support.
4 * Copyright (C) 2007, 2008 Wolfson Microelectronics PLC.
6 * Author: Liam Girdwood <lg@opensource.wolfsonmicro.com>
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/regulator/consumer.h>
22 struct regulator_init_data;
24 enum regulator_status {
27 REGULATOR_STATUS_ERROR,
28 /* fast/normal/idle/standby are flavors of "on" */
29 REGULATOR_STATUS_FAST,
30 REGULATOR_STATUS_NORMAL,
31 REGULATOR_STATUS_IDLE,
32 REGULATOR_STATUS_STANDBY,
36 * struct regulator_ops - regulator operations.
38 * This struct describes regulator operations which can be implemented by
39 * regulator chip drivers.
41 * @enable: Enable the regulator.
42 * @disable: Disable the regulator.
43 * @is_enabled: Return 1 if the regulator is enabled, 0 otherwise.
45 * @set_voltage: Set the voltage for the regulator within the range specified.
46 * The driver should select the voltage closest to min_uV.
47 * @get_voltage: Return the currently configured voltage for the regulator.
48 * @list_voltage: Return one of the supported voltages, in microvolts; zero
49 * if the selector indicates a voltage that is unusable on this system;
50 * or negative errno. Selectors range from zero to one less than
51 * regulator_desc.n_voltages. Voltages may be reported in any order.
53 * @set_current_limit: Configure a limit for a current-limited regulator.
54 * @get_current_limit: Get the limit for a current-limited regulator.
56 * @set_mode: Set the operating mode for the regulator.
57 * @get_mode: Get the current operating mode for the regulator.
58 * @get_optimum_mode: Get the most efficient operating mode for the regulator
59 * when running with the specified parameters.
61 * @set_suspend_voltage: Set the voltage for the regulator when the system
63 * @set_suspend_enable: Mark the regulator as enabled when the system is
65 * @set_suspend_disable: Mark the regulator as disabled when the system is
67 * @set_suspend_mode: Set the operating mode for the regulator when the
68 * system is suspended.
70 struct regulator_ops {
72 /* enumerate supported voltages */
73 int (*list_voltage) (struct regulator_dev *, unsigned selector);
75 /* get/set regulator voltage */
76 int (*set_voltage) (struct regulator_dev *, int min_uV, int max_uV);
77 int (*get_voltage) (struct regulator_dev *);
79 /* get/set regulator current */
80 int (*set_current_limit) (struct regulator_dev *,
81 int min_uA, int max_uA);
82 int (*get_current_limit) (struct regulator_dev *);
84 /* enable/disable regulator */
85 int (*enable) (struct regulator_dev *);
86 int (*disable) (struct regulator_dev *);
87 int (*is_enabled) (struct regulator_dev *);
89 /* get/set regulator operating mode (defined in regulator.h) */
90 int (*set_mode) (struct regulator_dev *, unsigned int mode);
91 unsigned int (*get_mode) (struct regulator_dev *);
93 /* report regulator status ... most other accessors report
94 * control inputs, this reports results of combining inputs
95 * from Linux (and other sources) with the actual load.
97 int (*get_status)(struct regulator_dev *);
99 /* get most efficient regulator operating mode for load */
100 unsigned int (*get_optimum_mode) (struct regulator_dev *, int input_uV,
101 int output_uV, int load_uA);
103 /* the operations below are for configuration of regulator state when
104 * its parent PMIC enters a global STANDBY/HIBERNATE state */
106 /* set regulator suspend voltage */
107 int (*set_suspend_voltage) (struct regulator_dev *, int uV);
109 /* enable/disable regulator in suspend state */
110 int (*set_suspend_enable) (struct regulator_dev *);
111 int (*set_suspend_disable) (struct regulator_dev *);
113 /* set regulator suspend operating mode (defined in regulator.h) */
114 int (*set_suspend_mode) (struct regulator_dev *, unsigned int mode);
118 * Regulators can either control voltage or current.
120 enum regulator_type {
126 * struct regulator_desc - Regulator descriptor
128 * Each regulator registered with the core is described with a structure of
131 * @name: Identifying name for the regulator.
132 * @id: Numerical identifier for the regulator.
133 * @n_voltages: Number of selectors available for ops.list_voltage().
134 * @ops: Regulator operations table.
135 * @irq: Interrupt number for the regulator.
136 * @type: Indicates if the regulator is a voltage or current regulator.
137 * @owner: Module providing the regulator, used for refcounting.
139 struct regulator_desc {
143 struct regulator_ops *ops;
145 enum regulator_type type;
146 struct module *owner;
149 struct regulator_dev *regulator_register(struct regulator_desc *regulator_desc,
150 struct device *dev, void *driver_data);
151 void regulator_unregister(struct regulator_dev *rdev);
153 int regulator_notifier_call_chain(struct regulator_dev *rdev,
154 unsigned long event, void *data);
156 void *rdev_get_drvdata(struct regulator_dev *rdev);
157 struct device *rdev_get_dev(struct regulator_dev *rdev);
158 int rdev_get_id(struct regulator_dev *rdev);
160 void *regulator_get_init_drvdata(struct regulator_init_data *reg_init_data);