SysTutorials Posts

regulator_suspend_prepare – prepare regulators for system wide suspend Synopsis int regulator_suspend_prepare(suspend_state_t state); Arguments state system suspend state Description Configure each regulator with it’s suspend operating parameters for state. This will usually be called by machine suspend code prior to supending. Authors Liam Girdwood <lrg [at] slimlogic.co.uk> Author. Mark Brown <broonie [at] opensource.wolfsonmicro.com> Wolfson Microelectronics,   …

regulator_suspend_finish – resume regulators from system wide suspend Synopsis int regulator_suspend_finish(void); Arguments void no arguments Description Turn on regulators that might be turned off by regulator_suspend_prepare and that should be turned on according to the regulators properties. Authors Liam Girdwood <lrg [at] slimlogic.co.uk> Author. Mark Brown <broonie [at] opensource.wolfsonmicro.com> Wolfson Microelectronics,    Author. Copyright

regulator_set_voltage_time_sel – get raise/fall time Synopsis int regulator_set_voltage_time_sel(struct regulator_dev *rdev, unsigned int old_selector, unsigned int new_selector); Arguments rdev regulator source device old_selector selector for starting voltage new_selector selector for target voltage Description Provided with the starting and target voltage selectors, this function returns time in microseconds required to rise or fall to this new voltage…

regulator_set_voltage_time – get raise/fall time Synopsis int regulator_set_voltage_time(struct regulator *regulator, int old_uV, int new_uV); Arguments regulator regulator source old_uV starting voltage in microvolts new_uV target voltage in microvolts Description Provided with the starting and ending voltage, this function attempts to calculate the time in microseconds required to rise or fall to this new voltage. Authors…

regulator_set_voltage – set regulator output voltage Synopsis int regulator_set_voltage(struct regulator *regulator, int min_uV, int max_uV); Arguments regulator regulator source min_uV Minimum required voltage in uV max_uV Maximum acceptable voltage in uV Description Sets a voltage regulator to the desired output voltage. This can be set during any regulator state. IOW, regulator can be disabled or…

regulator_set_mode – set regulator operating mode Synopsis int regulator_set_mode(struct regulator *regulator, unsigned int mode); Arguments regulator regulator source mode operating mode – one of the REGULATOR_MODE constants Description Set regulator operating mode to increase regulator efficiency or improve regulation performance. Note Regulator system constraints must be set for this regulator before calling this function otherwise…

regulator_set_load – set regulator load Synopsis int regulator_set_load(struct regulator *regulator, int uA_load); Arguments regulator regulator source uA_load load current Description Notifies the regulator core of a new device load. This is then used by DRMS (if enabled by constraints) to set the most efficient regulator operating mode for the new regulator loading. Consumer devices notify…

regulator_set_drvdata – set regulator driver data Synopsis void regulator_set_drvdata(struct regulator *regulator, void *data); Arguments regulator regulator data data Authors Liam Girdwood <lrg [at] slimlogic.co.uk> Author. Mark Brown <broonie [at] opensource.wolfsonmicro.com> Wolfson Microelectronics,    Author. Copyright

regulator_set_current_limit – set regulator output current limit Synopsis int regulator_set_current_limit(struct regulator *regulator, int min_uA, int max_uA); Arguments regulator regulator source min_uA Minimum supported current in uA max_uA Maximum supported current in uA Description Sets current sink to the desired output current. This can be set during any regulator state. IOW, regulator can be disabled or…

regulator_register_supply_alias – Provide device alias for supply lookup Synopsis int regulator_register_supply_alias(struct device *dev, const char *id, struct device *alias_dev, const char *alias_id); Arguments dev device that will be given as the regulator “consumer” id Supply name or regulator ID alias_dev device that should be used to lookup the supply alias_id Supply name or regulator ID…

regulator_register_notifier – register regulator event notifier Synopsis int regulator_register_notifier(struct regulator *regulator, struct notifier_block *nb); Arguments regulator regulator source nb notifier block Description Register notifier block to receive regulator events. Authors Liam Girdwood <lrg [at] slimlogic.co.uk> Author. Mark Brown <broonie [at] opensource.wolfsonmicro.com> Wolfson Microelectronics,    Author. Copyright

regulator_register – register regulator Synopsis struct regulator_dev *regulator_register(const struct regulator_desc *regulator_desc, const struct regulator_config *cfg); Arguments regulator_desc regulator to register cfg runtime configuration for regulator Description Called by regulator drivers to register a regulator. Returns a valid pointer to struct regulator_dev on success or an ERR_PTR on error. Authors Liam Girdwood <lrg [at] slimlogic.co.uk> Author….

regulator_put – "free" the regulator source Synopsis void regulator_put(struct regulator *regulator); Arguments regulator regulator source Note drivers must ensure that all regulator_enable calls made on this regulator source are balanced by regulator_disable calls prior to calling this function. Authors Liam Girdwood <lrg [at] slimlogic.co.uk> Author. Mark Brown <broonie [at] opensource.wolfsonmicro.com> Wolfson Microelectronics,    Author. Copyright

regulator_notifier_call_chain – call regulator event notifier Synopsis int regulator_notifier_call_chain(struct regulator_dev *rdev, unsigned long event, void *data); Arguments rdev regulator source event notifier block data callback-specific data. Description Called by regulator drivers to notify clients a regulator event has occurred. We also notify regulator clients downstream. Note lock must be held by caller. Authors Liam Girdwood…

regulator_mode_to_status – convert a regulator mode into a status Synopsis int regulator_mode_to_status(unsigned int mode); Arguments mode Mode to convert Description Convert a regulator mode into a status. Authors Liam Girdwood <lrg [at] slimlogic.co.uk> Author. Mark Brown <broonie [at] opensource.wolfsonmicro.com> Wolfson Microelectronics,    Author. Copyright

regulator_list_voltage – enumerate supported voltages Synopsis int regulator_list_voltage(struct regulator *regulator, unsigned selector); Arguments regulator regulator source selector identify voltage to list Context can sleep Description Returns a voltage that can be passed to regulator_set_voltage(), zero if this selector code can’t be used on this system, or a negative errno. Authors Liam Girdwood <lrg [at] slimlogic.co.uk>…

regulator_list_hardware_vsel – get the HW-specific register value for a selector Synopsis int regulator_list_hardware_vsel(struct regulator *regulator, unsigned selector); Arguments regulator regulator source selector identify voltage to list Description Converts the selector to a hardware-specific voltage selector that can be directly written to the regulator registers. The address of the voltage register can be determined by calling…

regulator_is_supported_voltage – check if a voltage range can be supported Synopsis int regulator_is_supported_voltage(struct regulator *regulator, int min_uV, int max_uV); Arguments regulator Regulator to check. min_uV Minimum required voltage in uV. max_uV Maximum required voltage in uV. Description Returns a boolean or a negative error code. Authors Liam Girdwood <lrg [at] slimlogic.co.uk> Author. Mark Brown <broonie…

regulator_is_enabled – is the regulator output enabled Synopsis int regulator_is_enabled(struct regulator *regulator); Arguments regulator regulator source Description Returns positive if the regulator driver backing the source/client has requested that the device be enabled, zero if it hasn’t, else a negative errno code. Note that the device backing this regulator handle can have multiple users, so…

regulator_has_full_constraints – the system has fully specified constraints Synopsis void regulator_has_full_constraints(void); Arguments void no arguments Description Calling this function will cause the regulator API to disable all regulators which have a zero use count and don’t have an always_on constraint in a late_initcall. The intention is that this will become the default behaviour in a…