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4.4.0-1128-aws
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include
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linux
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regulator
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machine.h
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/* * 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. * BYPASS: Regulator can be put into bypass mode */ #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 #define REGULATOR_CHANGE_BYPASS 0x20 /** * 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 current consumers may set. * @max_uA: Largest current consumers may set. * @ilim_uA: Maximum input current. * @system_load: Load that isn't captured by any consumer requests. * * @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. * @ramp_disable: Disable ramp delay when initialising or when setting voltage. * @soft_start: Enable soft start so that voltage ramps slowly. * @pull_down: Enable pull down when regulator is disabled. * * @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. * @ramp_delay: Time to settle down after voltage change (unit: uV/us) * @enable_time: Turn-on time of the rails (unit: microseconds) */ struct regulation_constraints { const 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; int ilim_uA; int system_load; /* 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; unsigned int ramp_delay; unsigned int enable_time; /* 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 */ unsigned ramp_disable:1; /* disable ramp delay */ unsigned soft_start:1; /* ramp voltage slowly */ unsigned pull_down:1; /* pull down resistor when regulator off */ unsigned over_current_protection:1; /* auto disable on over current */ }; /** * struct regulator_consumer_supply - supply -> device mapping * * This maps a supply name to a device. Use of dev_name allows support for * buses which make struct device available late such as I2C. * * @dev_name: Result of dev_name() for the consumer. * @supply: Name for the supply. */ struct regulator_consumer_supply { 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 */ }; #ifdef CONFIG_REGULATOR void regulator_has_full_constraints(void); int regulator_suspend_prepare(suspend_state_t state); int regulator_suspend_finish(void); #else static inline void regulator_has_full_constraints(void) { } static inline int regulator_suspend_prepare(suspend_state_t state) { return 0; } static inline int regulator_suspend_finish(void) { return 0; } #endif #endif