289 строки
8.7 KiB
C
289 строки
8.7 KiB
C
/*
|
|
* consumer.h -- SoC Regulator consumer 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 Consumer Interface.
|
|
*
|
|
* A Power Management Regulator framework for SoC based devices.
|
|
* Features:-
|
|
* o Voltage and current level control.
|
|
* o Operating mode control.
|
|
* o Regulator status.
|
|
* o sysfs entries for showing client devices and status
|
|
*
|
|
* EXPERIMENTAL FEATURES:
|
|
* Dynamic Regulator operating Mode Switching (DRMS) - allows regulators
|
|
* to use most efficient operating mode depending upon voltage and load and
|
|
* is transparent to client drivers.
|
|
*
|
|
* e.g. Devices x,y,z share regulator r. Device x and y draw 20mA each during
|
|
* IO and 1mA at idle. Device z draws 100mA when under load and 5mA when
|
|
* idling. Regulator r has > 90% efficiency in NORMAL mode at loads > 100mA
|
|
* but this drops rapidly to 60% when below 100mA. Regulator r has > 90%
|
|
* efficiency in IDLE mode at loads < 10mA. Thus regulator r will operate
|
|
* in normal mode for loads > 10mA and in IDLE mode for load <= 10mA.
|
|
*
|
|
*/
|
|
|
|
#ifndef __LINUX_REGULATOR_CONSUMER_H_
|
|
#define __LINUX_REGULATOR_CONSUMER_H_
|
|
|
|
/*
|
|
* Regulator operating modes.
|
|
*
|
|
* Regulators can run in a variety of different operating modes depending on
|
|
* output load. This allows further system power savings by selecting the
|
|
* best (and most efficient) regulator mode for a desired load.
|
|
*
|
|
* Most drivers will only care about NORMAL. The modes below are generic and
|
|
* will probably not match the naming convention of your regulator data sheet
|
|
* but should match the use cases in the datasheet.
|
|
*
|
|
* In order of power efficiency (least efficient at top).
|
|
*
|
|
* Mode Description
|
|
* FAST Regulator can handle fast changes in it's load.
|
|
* e.g. useful in CPU voltage & frequency scaling where
|
|
* load can quickly increase with CPU frequency increases.
|
|
*
|
|
* NORMAL Normal regulator power supply mode. Most drivers will
|
|
* use this mode.
|
|
*
|
|
* IDLE Regulator runs in a more efficient mode for light
|
|
* loads. Can be used for devices that have a low power
|
|
* requirement during periods of inactivity. This mode
|
|
* may be more noisy than NORMAL and may not be able
|
|
* to handle fast load switching.
|
|
*
|
|
* STANDBY Regulator runs in the most efficient mode for very
|
|
* light loads. Can be used by devices when they are
|
|
* in a sleep/standby state. This mode is likely to be
|
|
* the most noisy and may not be able to handle fast load
|
|
* switching.
|
|
*
|
|
* NOTE: Most regulators will only support a subset of these modes. Some
|
|
* will only just support NORMAL.
|
|
*
|
|
* These modes can be OR'ed together to make up a mask of valid register modes.
|
|
*/
|
|
|
|
#define REGULATOR_MODE_FAST 0x1
|
|
#define REGULATOR_MODE_NORMAL 0x2
|
|
#define REGULATOR_MODE_IDLE 0x4
|
|
#define REGULATOR_MODE_STANDBY 0x8
|
|
|
|
/*
|
|
* Regulator notifier events.
|
|
*
|
|
* UNDER_VOLTAGE Regulator output is under voltage.
|
|
* OVER_CURRENT Regulator output current is too high.
|
|
* REGULATION_OUT Regulator output is out of regulation.
|
|
* FAIL Regulator output has failed.
|
|
* OVER_TEMP Regulator over temp.
|
|
* FORCE_DISABLE Regulator shut down by software.
|
|
* VOLTAGE_CHANGE Regulator voltage changed.
|
|
*
|
|
* NOTE: These events can be OR'ed together when passed into handler.
|
|
*/
|
|
|
|
#define REGULATOR_EVENT_UNDER_VOLTAGE 0x01
|
|
#define REGULATOR_EVENT_OVER_CURRENT 0x02
|
|
#define REGULATOR_EVENT_REGULATION_OUT 0x04
|
|
#define REGULATOR_EVENT_FAIL 0x08
|
|
#define REGULATOR_EVENT_OVER_TEMP 0x10
|
|
#define REGULATOR_EVENT_FORCE_DISABLE 0x20
|
|
#define REGULATOR_EVENT_VOLTAGE_CHANGE 0x40
|
|
|
|
struct regulator;
|
|
|
|
/**
|
|
* struct regulator_bulk_data - Data used for bulk regulator operations.
|
|
*
|
|
* @supply: The name of the supply. Initialised by the user before
|
|
* using the bulk regulator APIs.
|
|
* @consumer: The regulator consumer for the supply. This will be managed
|
|
* by the bulk API.
|
|
*
|
|
* The regulator APIs provide a series of regulator_bulk_() API calls as
|
|
* a convenience to consumers which require multiple supplies. This
|
|
* structure is used to manage data for these calls.
|
|
*/
|
|
struct regulator_bulk_data {
|
|
const char *supply;
|
|
struct regulator *consumer;
|
|
};
|
|
|
|
#if defined(CONFIG_REGULATOR)
|
|
|
|
/* regulator get and put */
|
|
struct regulator *__must_check regulator_get(struct device *dev,
|
|
const char *id);
|
|
void regulator_put(struct regulator *regulator);
|
|
|
|
/* regulator output control and status */
|
|
int regulator_enable(struct regulator *regulator);
|
|
int regulator_disable(struct regulator *regulator);
|
|
int regulator_force_disable(struct regulator *regulator);
|
|
int regulator_is_enabled(struct regulator *regulator);
|
|
|
|
int regulator_bulk_get(struct device *dev, int num_consumers,
|
|
struct regulator_bulk_data *consumers);
|
|
int regulator_bulk_enable(int num_consumers,
|
|
struct regulator_bulk_data *consumers);
|
|
int regulator_bulk_disable(int num_consumers,
|
|
struct regulator_bulk_data *consumers);
|
|
void regulator_bulk_free(int num_consumers,
|
|
struct regulator_bulk_data *consumers);
|
|
|
|
int regulator_count_voltages(struct regulator *regulator);
|
|
int regulator_list_voltage(struct regulator *regulator, unsigned selector);
|
|
int regulator_set_voltage(struct regulator *regulator, int min_uV, int max_uV);
|
|
int regulator_get_voltage(struct regulator *regulator);
|
|
int regulator_set_current_limit(struct regulator *regulator,
|
|
int min_uA, int max_uA);
|
|
int regulator_get_current_limit(struct regulator *regulator);
|
|
|
|
int regulator_set_mode(struct regulator *regulator, unsigned int mode);
|
|
unsigned int regulator_get_mode(struct regulator *regulator);
|
|
int regulator_set_optimum_mode(struct regulator *regulator, int load_uA);
|
|
|
|
/* regulator notifier block */
|
|
int regulator_register_notifier(struct regulator *regulator,
|
|
struct notifier_block *nb);
|
|
int regulator_unregister_notifier(struct regulator *regulator,
|
|
struct notifier_block *nb);
|
|
|
|
/* driver data - core doesn't touch */
|
|
void *regulator_get_drvdata(struct regulator *regulator);
|
|
void regulator_set_drvdata(struct regulator *regulator, void *data);
|
|
|
|
#else
|
|
|
|
/*
|
|
* Make sure client drivers will still build on systems with no software
|
|
* controllable voltage or current regulators.
|
|
*/
|
|
static inline struct regulator *__must_check regulator_get(struct device *dev,
|
|
const char *id)
|
|
{
|
|
/* Nothing except the stubbed out regulator API should be
|
|
* looking at the value except to check if it is an error
|
|
* value so the actual return value doesn't matter.
|
|
*/
|
|
return (struct regulator *)id;
|
|
}
|
|
static inline void regulator_put(struct regulator *regulator)
|
|
{
|
|
}
|
|
|
|
static inline int regulator_enable(struct regulator *regulator)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline int regulator_disable(struct regulator *regulator)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline int regulator_is_enabled(struct regulator *regulator)
|
|
{
|
|
return 1;
|
|
}
|
|
|
|
static inline int regulator_bulk_get(struct device *dev,
|
|
int num_consumers,
|
|
struct regulator_bulk_data *consumers)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline int regulator_bulk_enable(int num_consumers,
|
|
struct regulator_bulk_data *consumers)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline int regulator_bulk_disable(int num_consumers,
|
|
struct regulator_bulk_data *consumers)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline void regulator_bulk_free(int num_consumers,
|
|
struct regulator_bulk_data *consumers)
|
|
{
|
|
}
|
|
|
|
static inline int regulator_set_voltage(struct regulator *regulator,
|
|
int min_uV, int max_uV)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline int regulator_get_voltage(struct regulator *regulator)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline int regulator_set_current_limit(struct regulator *regulator,
|
|
int min_uA, int max_uA)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline int regulator_get_current_limit(struct regulator *regulator)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline int regulator_set_mode(struct regulator *regulator,
|
|
unsigned int mode)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline unsigned int regulator_get_mode(struct regulator *regulator)
|
|
{
|
|
return REGULATOR_MODE_NORMAL;
|
|
}
|
|
|
|
static inline int regulator_set_optimum_mode(struct regulator *regulator,
|
|
int load_uA)
|
|
{
|
|
return REGULATOR_MODE_NORMAL;
|
|
}
|
|
|
|
static inline int regulator_register_notifier(struct regulator *regulator,
|
|
struct notifier_block *nb)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline int regulator_unregister_notifier(struct regulator *regulator,
|
|
struct notifier_block *nb)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline void *regulator_get_drvdata(struct regulator *regulator)
|
|
{
|
|
return NULL;
|
|
}
|
|
|
|
static inline void regulator_set_drvdata(struct regulator *regulator,
|
|
void *data)
|
|
{
|
|
}
|
|
|
|
#endif
|
|
|
|
#endif
|