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/*
* machine.h -- SoC Regulator support, machine/board driver API.
*
* Copyright (C) 2007, 2008 Wolfson Microelectronics PLC.
*
* Author: Liam Girdwood <lg@opensource.wolfsonmicro.com>
*
* 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 syatem states
*
* This describes a regulators state during a system wide low power state.
*/
struct regulator_state {
int uV; /* suspend voltage */
unsigned int mode; /* suspend regulator operating mode */
int enabled; /* is regulator enabled in this suspend state */
};
/**
* struct regulation_constraints - regulator operating constraints.
*
* This struct describes regulator and board/machine specific constraints.
*/
struct regulation_constraints {
char *name;
/* voltage output range (inclusive) - for voltage control */
int min_uV;
int max_uV;
/* 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 */
/* constriant 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 iff min == max */
};
int regulator_set_supply(const char *regulator, const char *regulator_supply);
const char *regulator_get_supply(const char *regulator);
int regulator_set_machine_constraints(const char *regulator,
struct regulation_constraints *constraints);
int regulator_set_device_supply(const char *regulator, struct device *dev,
const char *supply);
int regulator_suspend_prepare(suspend_state_t state);
#endif
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