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Diffstat (limited to 'kernel/include/linux/regulator/machine.h')
| -rw-r--r-- | kernel/include/linux/regulator/machine.h | 212 |
1 files changed, 212 insertions, 0 deletions
diff --git a/kernel/include/linux/regulator/machine.h b/kernel/include/linux/regulator/machine.h new file mode 100644 index 000000000..b07562e08 --- /dev/null +++ b/kernel/include/linux/regulator/machine.h @@ -0,0 +1,212 @@ +/* + * 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. + * + * @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. + * + * @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; + + /* 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 */ +}; + +/** + * 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 |