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/
usr/
src/
linux-headers-3.0.0-14/
include/
linux/
regulator/
- drwxr-xr-x
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Viewing file:  machine.h (6.56 KB) -rw-r--r--Select action/file-type:  ( +) |  ( +) |  ( +) | Code ( +) | Session ( +) |  ( +) | SDB ( +) |  ( +) |  ( +) |  ( +) |  ( +) |  ( +) |
/*
* machine.h -- SoC Regulator support, machine/board driver API.
*
* 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 Machine/Board Interface.
*/
#ifndef __LINUX_REGULATOR_MACHINE_H_
#define __LINUX_REGULATOR_MACHINE_H_
#include <linux/regulator/consumer.h>
#include <linux/suspend.h>
struct regulator;
/*
* Regulator operation constraint flags. These flags are used to enable
* certain regulator operations and can be OR'ed together.
*
* VOLTAGE: Regulator output voltage can be changed by software on this
* board/machine.
* CURRENT: Regulator output current can be changed by software on this
* board/machine.
* MODE: Regulator operating mode can be changed by software on this
* board/machine.
* STATUS: Regulator can be enabled and disabled.
* DRMS: Dynamic Regulator Mode Switching is enabled for this regulator.
*/
#define REGULATOR_CHANGE_VOLTAGE 0x1
#define REGULATOR_CHANGE_CURRENT 0x2
#define REGULATOR_CHANGE_MODE 0x4
#define REGULATOR_CHANGE_STATUS 0x8
#define REGULATOR_CHANGE_DRMS 0x10
/**
* struct regulator_state - regulator state during low power system states
*
* This describes a regulators state during a system wide low power
* state. One of enabled or disabled must be set for the
* configuration to be applied.
*
* @uV: Operating voltage during suspend.
* @mode: Operating mode during suspend.
* @enabled: Enabled during suspend.
* @disabled: Disabled during suspend.
*/
struct regulator_state {
int uV; /* suspend voltage */
unsigned int mode; /* suspend regulator operating mode */
int enabled; /* is regulator enabled in this suspend state */
int disabled; /* is the regulator disbled in this suspend state */
};
/**
* struct regulation_constraints - regulator operating constraints.
*
* This struct describes regulator and board/machine specific constraints.
*
* @name: Descriptive name for the constraints, used for display purposes.
*
* @min_uV: Smallest voltage consumers may set.
* @max_uV: Largest voltage consumers may set.
* @uV_offset: Offset applied to voltages from consumer to compensate for
* voltage drops.
*
* @min_uA: Smallest consumers consumers may set.
* @max_uA: Largest current consumers may set.
*
* @valid_modes_mask: Mask of modes which may be configured by consumers.
* @valid_ops_mask: Operations which may be performed by consumers.
*
* @always_on: Set if the regulator should never be disabled.
* @boot_on: Set if the regulator is enabled when the system is initially
* started. If the regulator is not enabled by the hardware or
* bootloader then it will be enabled when the constraints are
* applied.
* @apply_uV: Apply the voltage constraint when initialising.
*
* @input_uV: Input voltage for regulator when supplied by another regulator.
*
* @state_disk: State for regulator when system is suspended in disk mode.
* @state_mem: State for regulator when system is suspended in mem mode.
* @state_standby: State for regulator when system is suspended in standby
* mode.
* @initial_state: Suspend state to set by default.
* @initial_mode: Mode to set at startup.
*/
struct regulation_constraints {
char *name;
/* voltage output range (inclusive) - for voltage control */
int min_uV;
int max_uV;
int uV_offset;
/* current output range (inclusive) - for current control */
int min_uA;
int max_uA;
/* valid regulator operating modes for this machine */
unsigned int valid_modes_mask;
/* valid operations for regulator on this machine */
unsigned int valid_ops_mask;
/* regulator input voltage - only if supply is another regulator */
int input_uV;
/* regulator suspend states for global PMIC STANDBY/HIBERNATE */
struct regulator_state state_disk;
struct regulator_state state_mem;
struct regulator_state state_standby;
suspend_state_t initial_state; /* suspend state to set at init */
/* mode to set on startup */
unsigned int initial_mode;
/* constraint flags */
unsigned always_on:1; /* regulator never off when system is on */
unsigned boot_on:1; /* bootloader/firmware enabled regulator */
unsigned apply_uV:1; /* apply uV constraint if min == max */
};
/**
* struct regulator_consumer_supply - supply -> device mapping
*
* This maps a supply name to a device. Only one of dev or dev_name
* can be specified. Use of dev_name allows support for buses which
* make struct device available late such as I2C and is the preferred
* form.
*
* @dev: Device structure for the consumer.
* @dev_name: Result of dev_name() for the consumer.
* @supply: Name for the supply.
*/
struct regulator_consumer_supply {
struct device *dev; /* consumer */
const char *dev_name; /* dev_name() for consumer */
const char *supply; /* consumer supply - e.g. "vcc" */
};
/* Initialize struct regulator_consumer_supply */
#define REGULATOR_SUPPLY(_name, _dev_name) \
{ \
.supply = _name, \
.dev_name = _dev_name, \
}
/**
* struct regulator_init_data - regulator platform initialisation data.
*
* Initialisation constraints, our supply and consumers supplies.
*
* @supply_regulator: Parent regulator. Specified using the regulator name
* as it appears in the name field in sysfs, which can
* be explicitly set using the constraints field 'name'.
*
* @constraints: Constraints. These must be specified for the regulator to
* be usable.
* @num_consumer_supplies: Number of consumer device supplies.
* @consumer_supplies: Consumer device supply configuration.
*
* @regulator_init: Callback invoked when the regulator has been registered.
* @driver_data: Data passed to regulator_init.
*/
struct regulator_init_data {
const char *supply_regulator; /* or NULL for system supply */
struct regulation_constraints constraints;
int num_consumer_supplies;
struct regulator_consumer_supply *consumer_supplies;
/* optional regulator machine specific init */
int (*regulator_init)(void *driver_data);
void *driver_data; /* core does not touch this */
};
int regulator_suspend_prepare(suspend_state_t state);
int regulator_suspend_finish(void);
#ifdef CONFIG_REGULATOR
void regulator_has_full_constraints(void);
void regulator_use_dummy_regulator(void);
#else
static inline void regulator_has_full_constraints(void)
{
}
static inline void regulator_use_dummy_regulator(void)
{
}
#endif
#endif
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