| /* |
| * 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 |
| |
| /* |
| * 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 */ |
| int max_spread; |
| |
| /* 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 |
