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kernel/include/linux/regulator/driver.h
Jerome Brunet e55f45b0cd
regulator: doc: add missing documentation for init_cb 
Add comment documenting introduced init_cb.
This solves the following warning when building the kernel documentation:

./include/linux/regulator/driver.h:435: warning: Function parameter or struct member 'init_cb' not described in 'regulator_desc'

Fixes: cfcdf395c2 ("regulator: core: add callback to perform runtime init")
Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Closes: https://lore.kernel.org/lkml/20241023155120.6c4fea20@canb.auug.org.au/
Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>
Link: https://patch.msgid.link/20241023-regulator-doc-fixup-v1-1-ec018742ad73@baylibre.com
Signed-off-by: Mark Brown <broonie@kernel.org>
2024-10-23 12:46:39 +01:00

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/* SPDX-License-Identifier: GPL-2.0-only */
/*
* driver.h -- SoC Regulator driver support.
*
* Copyright (C) 2007, 2008 Wolfson Microelectronics PLC.
*
* Author: Liam Girdwood <lrg@slimlogic.co.uk>
*
* Regulator Driver Interface.
*/
#ifndef __LINUX_REGULATOR_DRIVER_H_
#define __LINUX_REGULATOR_DRIVER_H_
#include <linux/device.h>
#include <linux/linear_range.h>
#include <linux/notifier.h>
#include <linux/regulator/consumer.h>
#include <linux/ww_mutex.h>
struct gpio_desc;
struct regmap;
struct regulator_dev;
struct regulator_config;
struct regulator_init_data;
struct regulator_enable_gpio;
enum regulator_status {
REGULATOR_STATUS_OFF,
REGULATOR_STATUS_ON,
REGULATOR_STATUS_ERROR,
/* fast/normal/idle/standby are flavors of "on" */
REGULATOR_STATUS_FAST,
REGULATOR_STATUS_NORMAL,
REGULATOR_STATUS_IDLE,
REGULATOR_STATUS_STANDBY,
/* The regulator is enabled but not regulating */
REGULATOR_STATUS_BYPASS,
/* in case that any other status doesn't apply */
REGULATOR_STATUS_UNDEFINED,
};
enum regulator_detection_severity {
/* Hardware shut down voltage outputs if condition is detected */
REGULATOR_SEVERITY_PROT,
/* Hardware is probably damaged/inoperable */
REGULATOR_SEVERITY_ERR,
/* Hardware is still recoverable but recovery action must be taken */
REGULATOR_SEVERITY_WARN,
};
/* Initialize struct linear_range for regulators */
#define REGULATOR_LINEAR_RANGE(_min_uV, _min_sel, _max_sel, _step_uV) \
LINEAR_RANGE(_min_uV, _min_sel, _max_sel, _step_uV)
/**
* struct regulator_ops - regulator operations.
*
* @enable: Configure the regulator as enabled.
* @disable: Configure the regulator as disabled.
* @is_enabled: Return 1 if the regulator is enabled, 0 if not.
* May also return negative errno.
*
* @set_voltage: Set the voltage for the regulator within the range specified.
* The driver should select the voltage closest to min_uV.
* @set_voltage_sel: Set the voltage for the regulator using the specified
* selector.
* @map_voltage: Convert a voltage into a selector
* @get_voltage: Return the currently configured voltage for the regulator;
* return -ENOTRECOVERABLE if regulator can't be read at
* bootup and hasn't been set yet.
* @get_voltage_sel: Return the currently configured voltage selector for the
* regulator; return -ENOTRECOVERABLE if regulator can't
* be read at bootup and hasn't been set yet.
* @list_voltage: Return one of the supported voltages, in microvolts; zero
* if the selector indicates a voltage that is unusable on this system;
* or negative errno. Selectors range from zero to one less than
* regulator_desc.n_voltages. Voltages may be reported in any order.
*
* @set_current_limit: Configure a limit for a current-limited regulator.
* The driver should select the current closest to max_uA.
* @get_current_limit: Get the configured limit for a current-limited regulator.
* @set_input_current_limit: Configure an input limit.
*
* @set_over_current_protection: Support enabling of and setting limits for over
* current situation detection. Detection can be configured for three
* levels of severity.
*
* - REGULATOR_SEVERITY_PROT should automatically shut down the regulator(s).
*
* - REGULATOR_SEVERITY_ERR should indicate that over-current situation is
* caused by an unrecoverable error but HW does not perform
* automatic shut down.
*
* - REGULATOR_SEVERITY_WARN should indicate situation where hardware is
* still believed to not be damaged but that a board sepcific
* recovery action is needed. If lim_uA is 0 the limit should not
* be changed but the detection should just be enabled/disabled as
* is requested.
*
* @set_over_voltage_protection: Support enabling of and setting limits for over
* voltage situation detection. Detection can be configured for same
* severities as over current protection. Units of uV.
* @set_under_voltage_protection: Support enabling of and setting limits for
* under voltage situation detection. Detection can be configured for same
* severities as over current protection. Units of uV.
* @set_thermal_protection: Support enabling of and setting limits for over
* temperature situation detection.Detection can be configured for same
* severities as over current protection. Units of degree Kelvin.
*
* @set_active_discharge: Set active discharge enable/disable of regulators.
*
* @set_mode: Set the configured operating mode for the regulator.
* @get_mode: Get the configured operating mode for the regulator.
* @get_error_flags: Get the current error(s) for the regulator.
* @get_status: Return actual (not as-configured) status of regulator, as a
* REGULATOR_STATUS value (or negative errno)
* @get_optimum_mode: Get the most efficient operating mode for the regulator
* when running with the specified parameters.
* @set_load: Set the load for the regulator.
*
* @set_bypass: Set the regulator in bypass mode.
* @get_bypass: Get the regulator bypass mode state.
*
* @enable_time: Time taken for the regulator voltage output voltage to
* stabilise after being enabled, in microseconds.
* @set_ramp_delay: Set the ramp delay for the regulator. The driver should
* select ramp delay equal to or less than(closest) ramp_delay.
* @set_voltage_time: Time taken for the regulator voltage output voltage
* to stabilise after being set to a new value, in microseconds.
* The function receives the from and to voltage as input, it
* should return the worst case.
* @set_voltage_time_sel: Time taken for the regulator voltage output voltage
* to stabilise after being set to a new value, in microseconds.
* The function receives the from and to voltage selector as
* input, it should return the worst case.
* @set_soft_start: Enable soft start for the regulator.
*
* @set_suspend_voltage: Set the voltage for the regulator when the system
* is suspended.
* @set_suspend_enable: Mark the regulator as enabled when the system is
* suspended.
* @set_suspend_disable: Mark the regulator as disabled when the system is
* suspended.
* @set_suspend_mode: Set the operating mode for the regulator when the
* system is suspended.
* @resume: Resume operation of suspended regulator.
* @set_pull_down: Configure the regulator to pull down when the regulator
* is disabled.
*
* This struct describes regulator operations which can be implemented by
* regulator chip drivers.
*/
struct regulator_ops {
/* enumerate supported voltages */
int (*list_voltage) (struct regulator_dev *, unsigned selector);
/* get/set regulator voltage */
int (*set_voltage) (struct regulator_dev *, int min_uV, int max_uV,
unsigned *selector);
int (*map_voltage)(struct regulator_dev *, int min_uV, int max_uV);
int (*set_voltage_sel) (struct regulator_dev *, unsigned selector);
int (*get_voltage) (struct regulator_dev *);
int (*get_voltage_sel) (struct regulator_dev *);
/* get/set regulator current */
int (*set_current_limit) (struct regulator_dev *,
int min_uA, int max_uA);
int (*get_current_limit) (struct regulator_dev *);
int (*set_input_current_limit) (struct regulator_dev *, int lim_uA);
int (*set_over_current_protection)(struct regulator_dev *, int lim_uA,
int severity, bool enable);
int (*set_over_voltage_protection)(struct regulator_dev *, int lim_uV,
int severity, bool enable);
int (*set_under_voltage_protection)(struct regulator_dev *, int lim_uV,
int severity, bool enable);
int (*set_thermal_protection)(struct regulator_dev *, int lim,
int severity, bool enable);
int (*set_active_discharge)(struct regulator_dev *, bool enable);
/* enable/disable regulator */
int (*enable) (struct regulator_dev *);
int (*disable) (struct regulator_dev *);
int (*is_enabled) (struct regulator_dev *);
/* get/set regulator operating mode (defined in consumer.h) */
int (*set_mode) (struct regulator_dev *, unsigned int mode);
unsigned int (*get_mode) (struct regulator_dev *);
/* retrieve current error flags on the regulator */
int (*get_error_flags)(struct regulator_dev *, unsigned int *flags);
/* Time taken to enable or set voltage on the regulator */
int (*enable_time) (struct regulator_dev *);
int (*set_ramp_delay) (struct regulator_dev *, int ramp_delay);
int (*set_voltage_time) (struct regulator_dev *, int old_uV,
int new_uV);
int (*set_voltage_time_sel) (struct regulator_dev *,
unsigned int old_selector,
unsigned int new_selector);
int (*set_soft_start) (struct regulator_dev *);
/* report regulator status ... most other accessors report
* control inputs, this reports results of combining inputs
* from Linux (and other sources) with the actual load.
* returns REGULATOR_STATUS_* or negative errno.
*/
int (*get_status)(struct regulator_dev *);
/* get most efficient regulator operating mode for load */
unsigned int (*get_optimum_mode) (struct regulator_dev *, int input_uV,
int output_uV, int load_uA);
/* set the load on the regulator */
int (*set_load)(struct regulator_dev *, int load_uA);
/* control and report on bypass mode */
int (*set_bypass)(struct regulator_dev *dev, bool enable);
int (*get_bypass)(struct regulator_dev *dev, bool *enable);
/* the operations below are for configuration of regulator state when
* its parent PMIC enters a global STANDBY/HIBERNATE state */
/* set regulator suspend voltage */
int (*set_suspend_voltage) (struct regulator_dev *, int uV);
/* enable/disable regulator in suspend state */
int (*set_suspend_enable) (struct regulator_dev *);
int (*set_suspend_disable) (struct regulator_dev *);
/* set regulator suspend operating mode (defined in consumer.h) */
int (*set_suspend_mode) (struct regulator_dev *, unsigned int mode);
int (*resume)(struct regulator_dev *rdev);
int (*set_pull_down) (struct regulator_dev *);
};
/*
* Regulators can either control voltage or current.
*/
enum regulator_type {
REGULATOR_VOLTAGE,
REGULATOR_CURRENT,
};
/**
* struct regulator_desc - Static regulator descriptor
*
* Each regulator registered with the core is described with a
* structure of this type and a struct regulator_config. This
* structure contains the non-varying parts of the regulator
* description.
*
* @name: Identifying name for the regulator.
* @supply_name: Identifying the regulator supply
* @of_match: Name used to identify regulator in DT.
* @of_match_full_name: A flag to indicate that the of_match string, if
* present, should be matched against the node full_name.
* @regulators_node: Name of node containing regulator definitions in DT.
* @of_parse_cb: Optional callback called only if of_match is present.
* Will be called for each regulator parsed from DT, during
* init_data parsing.
* The regulator_config passed as argument to the callback will
* be a copy of config passed to regulator_register, valid only
* for this particular call. Callback may freely change the
* config but it cannot store it for later usage.
* Callback should return 0 on success or negative ERRNO
* indicating failure.
* @init_cb: Optional callback called after the parsing of init_data.
* Allows the regulator to perform runtime init if necessary,
* such as synching the regulator and the parsed constraints.
* Callback should return 0 on success or negative ERRNO
* indicating failure.
* @id: Numerical identifier for the regulator.
* @ops: Regulator operations table.
* @irq: Interrupt number for the regulator.
* @type: Indicates if the regulator is a voltage or current regulator.
* @owner: Module providing the regulator, used for refcounting.
*
* @continuous_voltage_range: Indicates if the regulator can set any
* voltage within constrains range.
* @n_voltages: Number of selectors available for ops.list_voltage().
* @n_current_limits: Number of selectors available for current limits
*
* @min_uV: Voltage given by the lowest selector (if linear mapping)
* @uV_step: Voltage increase with each selector (if linear mapping)
* @linear_min_sel: Minimal selector for starting linear mapping
* @fixed_uV: Fixed voltage of rails.
* @ramp_delay: Time to settle down after voltage change (unit: uV/us)
* @min_dropout_uV: The minimum dropout voltage this regulator can handle
* @linear_ranges: A constant table of possible voltage ranges.
* @linear_range_selectors_bitfield: A constant table of voltage range
* selectors as bitfield values. If
* pickable ranges are used each range
* must have corresponding selector here.
* @n_linear_ranges: Number of entries in the @linear_ranges (and in
* linear_range_selectors_bitfield if used) table(s).
* @volt_table: Voltage mapping table (if table based mapping)
* @curr_table: Current limit mapping table (if table based mapping)
*
* @vsel_range_reg: Register for range selector when using pickable ranges
* and ``regulator_map_*_voltage_*_pickable`` functions.
* @vsel_range_mask: Mask for register bitfield used for range selector
* @range_applied_by_vsel: A flag to indicate that changes to vsel_range_reg
* are only effective after vsel_reg is written
* @vsel_reg: Register for selector when using ``regulator_map_*_voltage_*``
* @vsel_mask: Mask for register bitfield used for selector
* @vsel_step: Specify the resolution of selector stepping when setting
* voltage. If 0, then no stepping is done (requested selector is
* set directly), if >0 then the regulator API will ramp the
* voltage up/down gradually each time increasing/decreasing the
* selector by the specified step value.
* @csel_reg: Register for current limit selector using regmap set_current_limit
* @csel_mask: Mask for register bitfield used for current limit selector
* @apply_reg: Register for initiate voltage change on the output when
* using regulator_set_voltage_sel_regmap
* @apply_bit: Register bitfield used for initiate voltage change on the
* output when using regulator_set_voltage_sel_regmap
* @enable_reg: Register for control when using regmap enable/disable ops
* @enable_mask: Mask for control when using regmap enable/disable ops
* @enable_val: Enabling value for control when using regmap enable/disable ops
* @disable_val: Disabling value for control when using regmap enable/disable ops
* @enable_is_inverted: A flag to indicate set enable_mask bits to disable
* when using regulator_enable_regmap and friends APIs.
* @bypass_reg: Register for control when using regmap set_bypass
* @bypass_mask: Mask for control when using regmap set_bypass
* @bypass_val_on: Enabling value for control when using regmap set_bypass
* @bypass_val_off: Disabling value for control when using regmap set_bypass
* @active_discharge_off: Enabling value for control when using regmap
* set_active_discharge
* @active_discharge_on: Disabling value for control when using regmap
* set_active_discharge
* @active_discharge_mask: Mask for control when using regmap
* set_active_discharge
* @active_discharge_reg: Register for control when using regmap
* set_active_discharge
* @soft_start_reg: Register for control when using regmap set_soft_start
* @soft_start_mask: Mask for control when using regmap set_soft_start
* @soft_start_val_on: Enabling value for control when using regmap
* set_soft_start
* @pull_down_reg: Register for control when using regmap set_pull_down
* @pull_down_mask: Mask for control when using regmap set_pull_down
* @pull_down_val_on: Enabling value for control when using regmap
* set_pull_down
*
* @ramp_reg: Register for controlling the regulator ramp-rate.
* @ramp_mask: Bitmask for the ramp-rate control register.
* @ramp_delay_table: Table for mapping the regulator ramp-rate values. Values
* should be given in units of V/S (uV/uS). See the
* regulator_set_ramp_delay_regmap().
* @n_ramp_values: number of elements at @ramp_delay_table.
*
* @enable_time: Time taken for initial enable of regulator (in uS).
* @off_on_delay: guard time (in uS), before re-enabling a regulator
*
* @poll_enabled_time: The polling interval (in uS) to use while checking that
* the regulator was actually enabled. Max upto enable_time.
*
* @of_map_mode: Maps a hardware mode defined in a DeviceTree to a standard mode
*/
struct regulator_desc {
const char *name;
const char *supply_name;
const char *of_match;
bool of_match_full_name;
const char *regulators_node;
int (*of_parse_cb)(struct device_node *,
const struct regulator_desc *,
struct regulator_config *);
int (*init_cb)(struct regulator_dev *,
struct regulator_config *);
int id;
unsigned int continuous_voltage_range:1;
unsigned n_voltages;
unsigned int n_current_limits;
const struct regulator_ops *ops;
int irq;
enum regulator_type type;
struct module *owner;
unsigned int min_uV;
unsigned int uV_step;
unsigned int linear_min_sel;
int fixed_uV;
unsigned int ramp_delay;
int min_dropout_uV;
const struct linear_range *linear_ranges;
const unsigned int *linear_range_selectors_bitfield;
int n_linear_ranges;
const unsigned int *volt_table;
const unsigned int *curr_table;
unsigned int vsel_range_reg;
unsigned int vsel_range_mask;
bool range_applied_by_vsel;
unsigned int vsel_reg;
unsigned int vsel_mask;
unsigned int vsel_step;
unsigned int csel_reg;
unsigned int csel_mask;
unsigned int apply_reg;
unsigned int apply_bit;
unsigned int enable_reg;
unsigned int enable_mask;
unsigned int enable_val;
unsigned int disable_val;
bool enable_is_inverted;
unsigned int bypass_reg;
unsigned int bypass_mask;
unsigned int bypass_val_on;
unsigned int bypass_val_off;
unsigned int active_discharge_on;
unsigned int active_discharge_off;
unsigned int active_discharge_mask;
unsigned int active_discharge_reg;
unsigned int soft_start_reg;
unsigned int soft_start_mask;
unsigned int soft_start_val_on;
unsigned int pull_down_reg;
unsigned int pull_down_mask;
unsigned int pull_down_val_on;
unsigned int ramp_reg;
unsigned int ramp_mask;
const unsigned int *ramp_delay_table;
unsigned int n_ramp_values;
unsigned int enable_time;
unsigned int off_on_delay;
unsigned int poll_enabled_time;
unsigned int (*of_map_mode)(unsigned int mode);
};
/**
* struct regulator_config - Dynamic regulator descriptor
*
* Each regulator registered with the core is described with a
* structure of this type and a struct regulator_desc. This structure
* contains the runtime variable parts of the regulator description.
*
* @dev: struct device for the regulator
* @init_data: platform provided init data, passed through by driver
* @driver_data: private regulator data
* @of_node: OpenFirmware node to parse for device tree bindings (may be
* NULL).
* @regmap: regmap to use for core regmap helpers if dev_get_regmap() is
* insufficient.
* @ena_gpiod: GPIO controlling regulator enable.
*/
struct regulator_config {
struct device *dev;
const struct regulator_init_data *init_data;
void *driver_data;
struct device_node *of_node;
struct regmap *regmap;
struct gpio_desc *ena_gpiod;
};
/**
* struct regulator_err_state - regulator error/notification status
*
* @rdev: Regulator which status the struct indicates.
* @notifs: Events which have occurred on the regulator.
* @errors: Errors which are active on the regulator.
* @possible_errs: Errors which can be signaled (by given IRQ).
*/
struct regulator_err_state {
struct regulator_dev *rdev;
unsigned long notifs;
unsigned long errors;
int possible_errs;
};
/**
* struct regulator_irq_data - regulator error/notification status data
*
* @states: Status structs for each of the associated regulators.
* @num_states: Amount of associated regulators.
* @data: Driver data pointer given at regulator_irq_desc.
* @opaque: Value storage for IC driver. Core does not update this. ICs
* may want to store status register value here at map_event and
* compare contents at 'renable' callback to see if new problems
* have been added to status. If that is the case it may be
* desirable to return REGULATOR_ERROR_CLEARED and not
* REGULATOR_ERROR_ON to allow IRQ fire again and to generate
* notifications also for the new issues.
*
* This structure is passed to 'map_event' and 'renable' callbacks for
* reporting regulator status to core.
*/
struct regulator_irq_data {
struct regulator_err_state *states;
int num_states;
void *data;
long opaque;
};
/**
* struct regulator_irq_desc - notification sender for IRQ based events.
*
* @name: The visible name for the IRQ
* @fatal_cnt: If this IRQ is used to signal HW damaging condition it may be
* best to shut-down regulator(s) or reboot the SOC if error
* handling is repeatedly failing. If fatal_cnt is given the IRQ
* handling is aborted if it fails for fatal_cnt times and die()
* callback (if populated) is called. If die() is not populated
* poweroff for the system is attempted in order to prevent any
* further damage.
* @reread_ms: The time which is waited before attempting to re-read status
* at the worker if IC reading fails. Immediate re-read is done
* if time is not specified.
* @irq_off_ms: The time which IRQ is kept disabled before re-evaluating the
* status for devices which keep IRQ disabled for duration of the
* error. If this is not given the IRQ is left enabled and renable
* is not called.
* @skip_off: If set to true the IRQ handler will attempt to check if any of
* the associated regulators are enabled prior to taking other
* actions. If no regulators are enabled and this is set to true
* a spurious IRQ is assumed and IRQ_NONE is returned.
* @high_prio: Boolean to indicate that high priority WQ should be used.
* @data: Driver private data pointer which will be passed as such to
* the renable, map_event and die callbacks in regulator_irq_data.
* @die: Protection callback. If IC status reading or recovery actions
* fail fatal_cnt times this callback is called or system is
* powered off. This callback should implement a final protection
* attempt like disabling the regulator. If protection succeeded
* die() may return 0. If anything else is returned the core
* assumes final protection failed and attempts to perform a
* poweroff as a last resort.
* @map_event: Driver callback to map IRQ status into regulator devices with
* events / errors. NOTE: callback MUST initialize both the
* errors and notifs for all rdevs which it signals having
* active events as core does not clean the map data.
* REGULATOR_FAILED_RETRY can be returned to indicate that the
* status reading from IC failed. If this is repeated for
* fatal_cnt times the core will call die() callback or power-off
* the system as a last resort to protect the HW.
* @renable: Optional callback to check status (if HW supports that) before
* re-enabling IRQ. If implemented this should clear the error
* flags so that errors fetched by regulator_get_error_flags()
* are updated. If callback is not implemented then errors are
* assumed to be cleared and IRQ is re-enabled.
* REGULATOR_FAILED_RETRY can be returned to
* indicate that the status reading from IC failed. If this is
* repeated for 'fatal_cnt' times the core will call die()
* callback or if die() is not populated then attempt to power-off
* the system as a last resort to protect the HW.
* Returning zero indicates that the problem in HW has been solved
* and IRQ will be re-enabled. Returning REGULATOR_ERROR_ON
* indicates the error condition is still active and keeps IRQ
* disabled. Please note that returning REGULATOR_ERROR_ON does
* not retrigger evaluating what events are active or resending
* notifications. If this is needed you probably want to return
* zero and allow IRQ to retrigger causing events to be
* re-evaluated and re-sent.
*
* This structure is used for registering regulator IRQ notification helper.
*/
struct regulator_irq_desc {
const char *name;
int fatal_cnt;
int reread_ms;
int irq_off_ms;
bool skip_off;
bool high_prio;
void *data;
int (*die)(struct regulator_irq_data *rid);
int (*map_event)(int irq, struct regulator_irq_data *rid,
unsigned long *dev_mask);
int (*renable)(struct regulator_irq_data *rid);
};
/*
* Return values for regulator IRQ helpers.
*/
enum {
REGULATOR_ERROR_CLEARED,
REGULATOR_FAILED_RETRY,
REGULATOR_ERROR_ON,
};
/*
* struct coupling_desc
*
* Describes coupling of regulators. Each regulator should have
* at least a pointer to itself in coupled_rdevs array.
* When a new coupled regulator is resolved, n_resolved is
* incremented.
*/
struct coupling_desc {
struct regulator_dev **coupled_rdevs;
struct regulator_coupler *coupler;
int n_resolved;
int n_coupled;
};
/*
* struct regulator_dev
*
* Voltage / Current regulator class device. One for each
* regulator.
*
* This should *not* be used directly by anything except the regulator
* core and notification injection (which should take the mutex and do
* no other direct access).
*/
struct regulator_dev {
const struct regulator_desc *desc;
int exclusive;
u32 use_count;
u32 open_count;
u32 bypass_count;
/* lists we belong to */
struct list_head list; /* list of all regulators */
/* lists we own */
struct list_head consumer_list; /* consumers we supply */
struct coupling_desc coupling_desc;
struct blocking_notifier_head notifier;
struct ww_mutex mutex; /* consumer lock */
struct task_struct *mutex_owner;
int ref_cnt;
struct module *owner;
struct device dev;
struct regulation_constraints *constraints;
struct regulator *supply; /* for tree */
const char *supply_name;
struct regmap *regmap;
struct delayed_work disable_work;
void *reg_data; /* regulator_dev data */
struct dentry *debugfs;
struct regulator_enable_gpio *ena_pin;
unsigned int ena_gpio_state:1;
unsigned int is_switch:1;
/* time when this regulator was disabled last time */
ktime_t last_off;
int cached_err;
bool use_cached_err;
spinlock_t err_lock;
};
/*
* Convert error flags to corresponding notifications.
*
* Can be used by drivers which use the notification helpers to
* find out correct notification flags based on the error flags. Drivers
* can avoid storing both supported notification and error flags which
* may save few bytes.
*/
static inline int regulator_err2notif(int err)
{
switch (err) {
case REGULATOR_ERROR_UNDER_VOLTAGE:
return REGULATOR_EVENT_UNDER_VOLTAGE;
case REGULATOR_ERROR_OVER_CURRENT:
return REGULATOR_EVENT_OVER_CURRENT;
case REGULATOR_ERROR_REGULATION_OUT:
return REGULATOR_EVENT_REGULATION_OUT;
case REGULATOR_ERROR_FAIL:
return REGULATOR_EVENT_FAIL;
case REGULATOR_ERROR_OVER_TEMP:
return REGULATOR_EVENT_OVER_TEMP;
case REGULATOR_ERROR_UNDER_VOLTAGE_WARN:
return REGULATOR_EVENT_UNDER_VOLTAGE_WARN;
case REGULATOR_ERROR_OVER_CURRENT_WARN:
return REGULATOR_EVENT_OVER_CURRENT_WARN;
case REGULATOR_ERROR_OVER_VOLTAGE_WARN:
return REGULATOR_EVENT_OVER_VOLTAGE_WARN;
case REGULATOR_ERROR_OVER_TEMP_WARN:
return REGULATOR_EVENT_OVER_TEMP_WARN;
}
return 0;
}
struct regulator_dev *
regulator_register(struct device *dev,
const struct regulator_desc *regulator_desc,
const struct regulator_config *config);
struct regulator_dev *
devm_regulator_register(struct device *dev,
const struct regulator_desc *regulator_desc,
const struct regulator_config *config);
void regulator_unregister(struct regulator_dev *rdev);
int regulator_notifier_call_chain(struct regulator_dev *rdev,
unsigned long event, void *data);
void *devm_regulator_irq_helper(struct device *dev,
const struct regulator_irq_desc *d, int irq,
int irq_flags, int common_errs,
int *per_rdev_errs, struct regulator_dev **rdev,
int rdev_amount);
void *regulator_irq_helper(struct device *dev,
const struct regulator_irq_desc *d, int irq,
int irq_flags, int common_errs, int *per_rdev_errs,
struct regulator_dev **rdev, int rdev_amount);
void regulator_irq_helper_cancel(void **handle);
int regulator_irq_map_event_simple(int irq, struct regulator_irq_data *rid,
unsigned long *dev_mask);
void *rdev_get_drvdata(struct regulator_dev *rdev);
struct device *rdev_get_dev(struct regulator_dev *rdev);
struct regmap *rdev_get_regmap(struct regulator_dev *rdev);
int rdev_get_id(struct regulator_dev *rdev);
int regulator_mode_to_status(unsigned int);
int regulator_list_voltage_linear(struct regulator_dev *rdev,
unsigned int selector);
int regulator_list_voltage_pickable_linear_range(struct regulator_dev *rdev,
unsigned int selector);
int regulator_list_voltage_linear_range(struct regulator_dev *rdev,
unsigned int selector);
int regulator_list_voltage_table(struct regulator_dev *rdev,
unsigned int selector);
int regulator_map_voltage_linear(struct regulator_dev *rdev,
int min_uV, int max_uV);
int regulator_map_voltage_pickable_linear_range(struct regulator_dev *rdev,
int min_uV, int max_uV);
int regulator_map_voltage_linear_range(struct regulator_dev *rdev,
int min_uV, int max_uV);
int regulator_map_voltage_iterate(struct regulator_dev *rdev,
int min_uV, int max_uV);
int regulator_map_voltage_ascend(struct regulator_dev *rdev,
int min_uV, int max_uV);
int regulator_get_voltage_sel_pickable_regmap(struct regulator_dev *rdev);
int regulator_set_voltage_sel_pickable_regmap(struct regulator_dev *rdev,
unsigned int sel);
int regulator_get_voltage_sel_regmap(struct regulator_dev *rdev);
int regulator_set_voltage_sel_regmap(struct regulator_dev *rdev, unsigned sel);
int regulator_is_enabled_regmap(struct regulator_dev *rdev);
int regulator_enable_regmap(struct regulator_dev *rdev);
int regulator_disable_regmap(struct regulator_dev *rdev);
int regulator_set_voltage_time_sel(struct regulator_dev *rdev,
unsigned int old_selector,
unsigned int new_selector);
int regulator_set_bypass_regmap(struct regulator_dev *rdev, bool enable);
int regulator_get_bypass_regmap(struct regulator_dev *rdev, bool *enable);
int regulator_set_soft_start_regmap(struct regulator_dev *rdev);
int regulator_set_pull_down_regmap(struct regulator_dev *rdev);
int regulator_set_active_discharge_regmap(struct regulator_dev *rdev,
bool enable);
int regulator_set_current_limit_regmap(struct regulator_dev *rdev,
int min_uA, int max_uA);
int regulator_get_current_limit_regmap(struct regulator_dev *rdev);
void *regulator_get_init_drvdata(struct regulator_init_data *reg_init_data);
int regulator_find_closest_bigger(unsigned int target, const unsigned int *table,
unsigned int num_sel, unsigned int *sel);
int regulator_set_ramp_delay_regmap(struct regulator_dev *rdev, int ramp_delay);
int regulator_sync_voltage_rdev(struct regulator_dev *rdev);
/*
* Helper functions intended to be used by regulator drivers prior registering
* their regulators.
*/
int regulator_desc_list_voltage_linear_range(const struct regulator_desc *desc,
unsigned int selector);
int regulator_desc_list_voltage_linear(const struct regulator_desc *desc,
unsigned int selector);
#ifdef CONFIG_REGULATOR
const char *rdev_get_name(struct regulator_dev *rdev);
#else
static inline const char *rdev_get_name(struct regulator_dev *rdev)
{
return NULL;
}
#endif
#endif
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