230 lines
7.7 KiB
C
230 lines
7.7 KiB
C
/*
|
|
* driver.h -- SoC Regulator driver support.
|
|
*
|
|
* Copyright (C) 2007, 2008 Wolfson Microelectronics PLC.
|
|
*
|
|
* Author: Liam Girdwood <lrg@slimlogic.co.uk>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License version 2 as
|
|
* published by the Free Software Foundation.
|
|
*
|
|
* Regulator Driver Interface.
|
|
*/
|
|
|
|
#ifndef __LINUX_REGULATOR_DRIVER_H_
|
|
#define __LINUX_REGULATOR_DRIVER_H_
|
|
|
|
#include <linux/device.h>
|
|
#include <linux/notifier.h>
|
|
#include <linux/regulator/consumer.h>
|
|
|
|
struct regulator_dev;
|
|
struct regulator_init_data;
|
|
|
|
enum regulator_status {
|
|
REGULATOR_STATUS_OFF,
|
|
REGULATOR_STATUS_ON,
|
|
REGULATOR_STATUS_ERROR,
|
|
/* fast/normal/idle/standby are flavors of "on" */
|
|
REGULATOR_STATUS_FAST,
|
|
REGULATOR_STATUS_NORMAL,
|
|
REGULATOR_STATUS_IDLE,
|
|
REGULATOR_STATUS_STANDBY,
|
|
};
|
|
|
|
/**
|
|
* struct regulator_ops - regulator operations.
|
|
*
|
|
* @enable: Configure the regulator as enabled.
|
|
* @disable: Configure the regulator as disabled.
|
|
* @is_enabled: Return 1 if the regulator is enabled, 0 if not.
|
|
* May also return negative errno.
|
|
*
|
|
* @set_voltage: Set the voltage for the regulator within the range specified.
|
|
* The driver should select the voltage closest to min_uV.
|
|
* @set_voltage_sel: Set the voltage for the regulator using the specified
|
|
* selector.
|
|
* @get_voltage: Return the currently configured voltage for the regulator.
|
|
* @get_voltage_sel: Return the currently configured voltage selector for the
|
|
* regulator.
|
|
* @list_voltage: Return one of the supported voltages, in microvolts; zero
|
|
* if the selector indicates a voltage that is unusable on this system;
|
|
* or negative errno. Selectors range from zero to one less than
|
|
* regulator_desc.n_voltages. Voltages may be reported in any order.
|
|
*
|
|
* @set_current_limit: Configure a limit for a current-limited regulator.
|
|
* @get_current_limit: Get the configured limit for a current-limited regulator.
|
|
*
|
|
* @set_mode: Set the configured operating mode for the regulator.
|
|
* @get_mode: Get the configured operating mode for the regulator.
|
|
* @get_status: Return actual (not as-configured) status of regulator, as a
|
|
* REGULATOR_STATUS value (or negative errno)
|
|
* @get_optimum_mode: Get the most efficient operating mode for the regulator
|
|
* when running with the specified parameters.
|
|
*
|
|
* @enable_time: Time taken for the regulator voltage output voltage to
|
|
* stabilise after being enabled, in microseconds.
|
|
* @set_voltage_time_sel: Time taken for the regulator voltage output voltage
|
|
* to stabilise after being set to a new value, in microseconds.
|
|
* The function provides the from and to voltage selector, the
|
|
* function should return the worst case.
|
|
*
|
|
* @set_suspend_voltage: Set the voltage for the regulator when the system
|
|
* is suspended.
|
|
* @set_suspend_enable: Mark the regulator as enabled when the system is
|
|
* suspended.
|
|
* @set_suspend_disable: Mark the regulator as disabled when the system is
|
|
* suspended.
|
|
* @set_suspend_mode: Set the operating mode for the regulator when the
|
|
* system is suspended.
|
|
*
|
|
* This struct describes regulator operations which can be implemented by
|
|
* regulator chip drivers.
|
|
*/
|
|
struct regulator_ops {
|
|
|
|
/* enumerate supported voltages */
|
|
int (*list_voltage) (struct regulator_dev *, unsigned selector);
|
|
|
|
/* get/set regulator voltage */
|
|
int (*set_voltage) (struct regulator_dev *, int min_uV, int max_uV,
|
|
unsigned *selector);
|
|
int (*set_voltage_sel) (struct regulator_dev *, unsigned selector);
|
|
int (*get_voltage) (struct regulator_dev *);
|
|
int (*get_voltage_sel) (struct regulator_dev *);
|
|
|
|
/* get/set regulator current */
|
|
int (*set_current_limit) (struct regulator_dev *,
|
|
int min_uA, int max_uA);
|
|
int (*get_current_limit) (struct regulator_dev *);
|
|
|
|
/* enable/disable regulator */
|
|
int (*enable) (struct regulator_dev *);
|
|
int (*disable) (struct regulator_dev *);
|
|
int (*is_enabled) (struct regulator_dev *);
|
|
|
|
/* get/set regulator operating mode (defined in regulator.h) */
|
|
int (*set_mode) (struct regulator_dev *, unsigned int mode);
|
|
unsigned int (*get_mode) (struct regulator_dev *);
|
|
|
|
/* Time taken to enable or set voltage on the regulator */
|
|
int (*enable_time) (struct regulator_dev *);
|
|
int (*set_voltage_time_sel) (struct regulator_dev *,
|
|
unsigned int old_selector,
|
|
unsigned int new_selector);
|
|
|
|
/* report regulator status ... most other accessors report
|
|
* control inputs, this reports results of combining inputs
|
|
* from Linux (and other sources) with the actual load.
|
|
* returns REGULATOR_STATUS_* or negative errno.
|
|
*/
|
|
int (*get_status)(struct regulator_dev *);
|
|
|
|
/* get most efficient regulator operating mode for load */
|
|
unsigned int (*get_optimum_mode) (struct regulator_dev *, int input_uV,
|
|
int output_uV, int load_uA);
|
|
|
|
/* the operations below are for configuration of regulator state when
|
|
* its parent PMIC enters a global STANDBY/HIBERNATE state */
|
|
|
|
/* set regulator suspend voltage */
|
|
int (*set_suspend_voltage) (struct regulator_dev *, int uV);
|
|
|
|
/* enable/disable regulator in suspend state */
|
|
int (*set_suspend_enable) (struct regulator_dev *);
|
|
int (*set_suspend_disable) (struct regulator_dev *);
|
|
|
|
/* set regulator suspend operating mode (defined in regulator.h) */
|
|
int (*set_suspend_mode) (struct regulator_dev *, unsigned int mode);
|
|
};
|
|
|
|
/*
|
|
* Regulators can either control voltage or current.
|
|
*/
|
|
enum regulator_type {
|
|
REGULATOR_VOLTAGE,
|
|
REGULATOR_CURRENT,
|
|
};
|
|
|
|
/**
|
|
* struct regulator_desc - Regulator descriptor
|
|
*
|
|
* Each regulator registered with the core is described with a structure of
|
|
* this type.
|
|
*
|
|
* @name: Identifying name for the regulator.
|
|
* @id: Numerical identifier for the regulator.
|
|
* @n_voltages: Number of selectors available for ops.list_voltage().
|
|
* @ops: Regulator operations table.
|
|
* @irq: Interrupt number for the regulator.
|
|
* @type: Indicates if the regulator is a voltage or current regulator.
|
|
* @owner: Module providing the regulator, used for refcounting.
|
|
*/
|
|
struct regulator_desc {
|
|
const char *name;
|
|
int id;
|
|
unsigned n_voltages;
|
|
struct regulator_ops *ops;
|
|
int irq;
|
|
enum regulator_type type;
|
|
struct module *owner;
|
|
};
|
|
|
|
/*
|
|
* struct regulator_dev
|
|
*
|
|
* Voltage / Current regulator class device. One for each
|
|
* regulator.
|
|
*
|
|
* This should *not* be used directly by anything except the regulator
|
|
* core and notification injection (which should take the mutex and do
|
|
* no other direct access).
|
|
*/
|
|
struct regulator_dev {
|
|
struct regulator_desc *desc;
|
|
int exclusive;
|
|
u32 use_count;
|
|
u32 open_count;
|
|
|
|
/* lists we belong to */
|
|
struct list_head list; /* list of all regulators */
|
|
|
|
/* lists we own */
|
|
struct list_head consumer_list; /* consumers we supply */
|
|
|
|
struct blocking_notifier_head notifier;
|
|
struct mutex mutex; /* consumer lock */
|
|
struct module *owner;
|
|
struct device dev;
|
|
struct regulation_constraints *constraints;
|
|
struct regulator *supply; /* for tree */
|
|
|
|
struct delayed_work disable_work;
|
|
int deferred_disables;
|
|
|
|
void *reg_data; /* regulator_dev data */
|
|
|
|
#ifdef CONFIG_DEBUG_FS
|
|
struct dentry *debugfs;
|
|
#endif
|
|
};
|
|
|
|
struct regulator_dev *regulator_register(struct regulator_desc *regulator_desc,
|
|
struct device *dev, const struct regulator_init_data *init_data,
|
|
void *driver_data);
|
|
void regulator_unregister(struct regulator_dev *rdev);
|
|
|
|
int regulator_notifier_call_chain(struct regulator_dev *rdev,
|
|
unsigned long event, void *data);
|
|
|
|
void *rdev_get_drvdata(struct regulator_dev *rdev);
|
|
struct device *rdev_get_dev(struct regulator_dev *rdev);
|
|
int rdev_get_id(struct regulator_dev *rdev);
|
|
|
|
int regulator_mode_to_status(unsigned int);
|
|
|
|
void *regulator_get_init_drvdata(struct regulator_init_data *reg_init_data);
|
|
|
|
#endif
|