105 lines
3.1 KiB
C
105 lines
3.1 KiB
C
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/*
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* machine.h -- SoC Regulator support, machine/board driver API.
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*
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* Copyright (C) 2007, 2008 Wolfson Microelectronics PLC.
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*
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* Author: Liam Girdwood <lg@opensource.wolfsonmicro.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* Regulator Machine/Board Interface.
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*/
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#ifndef __LINUX_REGULATOR_MACHINE_H_
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#define __LINUX_REGULATOR_MACHINE_H_
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#include <linux/regulator/consumer.h>
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#include <linux/suspend.h>
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struct regulator;
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/*
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* Regulator operation constraint flags. These flags are used to enable
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* certain regulator operations and can be OR'ed together.
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*
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* VOLTAGE: Regulator output voltage can be changed by software on this
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* board/machine.
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* CURRENT: Regulator output current can be changed by software on this
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* board/machine.
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* MODE: Regulator operating mode can be changed by software on this
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* board/machine.
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* STATUS: Regulator can be enabled and disabled.
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* DRMS: Dynamic Regulator Mode Switching is enabled for this regulator.
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*/
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#define REGULATOR_CHANGE_VOLTAGE 0x1
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#define REGULATOR_CHANGE_CURRENT 0x2
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#define REGULATOR_CHANGE_MODE 0x4
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#define REGULATOR_CHANGE_STATUS 0x8
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#define REGULATOR_CHANGE_DRMS 0x10
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/**
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* struct regulator_state - regulator state during low power syatem states
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*
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* This describes a regulators state during a system wide low power state.
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*/
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struct regulator_state {
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int uV; /* suspend voltage */
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unsigned int mode; /* suspend regulator operating mode */
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int enabled; /* is regulator enabled in this suspend state */
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};
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/**
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* struct regulation_constraints - regulator operating constraints.
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*
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* This struct describes regulator and board/machine specific constraints.
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*/
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struct regulation_constraints {
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char *name;
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/* voltage output range (inclusive) - for voltage control */
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int min_uV;
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int max_uV;
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/* current output range (inclusive) - for current control */
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int min_uA;
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int max_uA;
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/* valid regulator operating modes for this machine */
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unsigned int valid_modes_mask;
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/* valid operations for regulator on this machine */
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unsigned int valid_ops_mask;
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/* regulator input voltage - only if supply is another regulator */
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int input_uV;
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/* regulator suspend states for global PMIC STANDBY/HIBERNATE */
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struct regulator_state state_disk;
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struct regulator_state state_mem;
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struct regulator_state state_standby;
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suspend_state_t initial_state; /* suspend state to set at init */
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/* constriant flags */
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unsigned always_on:1; /* regulator never off when system is on */
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unsigned boot_on:1; /* bootloader/firmware enabled regulator */
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unsigned apply_uV:1; /* apply uV constraint iff min == max */
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};
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int regulator_set_supply(const char *regulator, const char *regulator_supply);
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const char *regulator_get_supply(const char *regulator);
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int regulator_set_machine_constraints(const char *regulator,
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struct regulation_constraints *constraints);
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int regulator_set_device_supply(const char *regulator, struct device *dev,
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const char *supply);
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int regulator_suspend_prepare(suspend_state_t state);
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#endif
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