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/* SPDX-License-Identifier: GPL-2.0-only / / * machine.h -- SoC Regulator support, machine/board driver API. * * Copyright (C) 2007, 2008 Wolfson Microelectronics PLC. * * Author: Liam Girdwood <lrg@slimlogic.co.uk> * * 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 / * operations in suspend mode * DO_NOTHING_IN_SUSPEND - the default value * DISABLE_IN_SUSPEND - turn off regulator in suspend states * ENABLE_IN_SUSPEND - keep regulator on in suspend states / #define DO_NOTHING_IN_SUSPEND 0 #define DISABLE_IN_SUSPEND 1 #define ENABLE_IN_SUSPEND 2 / Regulator active discharge flags / enum regulator_active_discharge { REGULATOR_ACTIVE_DISCHARGE_DEFAULT, REGULATOR_ACTIVE_DISCHARGE_DISABLE, REGULATOR_ACTIVE_DISCHARGE_ENABLE, }; /* * 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: Default operating voltage during suspend, it can be adjusted * among <min_uV, max_uV>. * @min_uV: Minimum suspend voltage may be set. * @max_uV: Maximum suspend voltage may be set. * @mode: Operating mode during suspend. * @enabled: operations during suspend. * - DO_NOTHING_IN_SUSPEND * - DISABLE_IN_SUSPEND * - ENABLE_IN_SUSPEND * @changeable: Is this state can be switched between enabled/disabled, / struct regulator_state { int uV; int min_uV; int max_uV; unsigned int mode; int enabled; bool changeable; }; /* * 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. * * @max_spread: Max possible spread between coupled regulators * @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. * @over_current_protection: Auto disable on over current event. * * @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) * @settling_time: Time to settle down after voltage change when voltage * change is non-linear (unit: microseconds). * @settling_time_up: Time to settle down after voltage increase when voltage * change is non-linear (unit: microseconds). * @settling_time_down : Time to settle down after voltage decrease when * voltage change is non-linear (unit: microseconds). * @active_discharge: Enable/disable active discharge. The enum * regulator_active_discharge values are used for * initialisation. * @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; / used for coupled regulators / u32 max_spread; /* used for changing voltage in steps / int max_uV_step; / 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 settling_time; unsigned int settling_time_up; unsigned int settling_time_down; unsigned int enable_time; unsigned int active_discharge; / 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); #else static inline void regulator_has_full_constraints(void) { } #endif static inline int regulator_suspend_prepare(suspend_state_t state) { return 0; } static inline int regulator_suspend_finish(void) { return 0; } #endif

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