You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
450 lines
16 KiB
450 lines
16 KiB
/* |
|
* driver.h -- SoC Regulator driver support. |
|
* |
|
* 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 Driver Interface. |
|
*/ |
|
|
|
#ifndef __LINUX_REGULATOR_DRIVER_H_ |
|
#define __LINUX_REGULATOR_DRIVER_H_ |
|
|
|
#include <linux/device.h> |
|
#include <linux/notifier.h> |
|
#include <linux/regulator/consumer.h> |
|
|
|
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, |
|
}; |
|
|
|
/** |
|
* struct regulator_linear_range - specify linear voltage ranges |
|
* |
|
* Specify a range of voltages for regulator_map_linar_range() and |
|
* regulator_list_linear_range(). |
|
* |
|
* @min_uV: Lowest voltage in range |
|
* @min_sel: Lowest selector for range |
|
* @max_sel: Highest selector for range |
|
* @uV_step: Step size |
|
*/ |
|
struct regulator_linear_range { |
|
unsigned int min_uV; |
|
unsigned int min_sel; |
|
unsigned int max_sel; |
|
unsigned int uV_step; |
|
}; |
|
|
|
/* Initialize struct regulator_linear_range */ |
|
#define REGULATOR_LINEAR_RANGE(_min_uV, _min_sel, _max_sel, _step_uV) \ |
|
{ \ |
|
.min_uV = _min_uV, \ |
|
.min_sel = _min_sel, \ |
|
.max_sel = _max_sel, \ |
|
.uV_step = _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. |
|
* @get_voltage_sel: Return the currently configured voltage selector for the |
|
* regulator. |
|
* @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_mode: Set the configured operating mode for the regulator. |
|
* @get_mode: Get the configured operating mode 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_sel: Time taken for the regulator voltage output voltage |
|
* to stabilise after being set to a new value, in microseconds. |
|
* The function provides the from and to voltage selector, the |
|
* function 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. |
|
* |
|
* @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 *); |
|
|
|
/* 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 *); |
|
|
|
/* 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_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 (*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. |
|
* @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. |
|
* @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(). |
|
* |
|
* @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. |
|
* @n_linear_ranges: Number of entries in the @linear_ranges table. |
|
* @volt_table: Voltage mapping table (if table based mapping) |
|
* |
|
* @vsel_reg: Register for selector when using regulator_regmap_X_voltage_ |
|
* @vsel_mask: Mask for register bitfield used for 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 |
|
* |
|
* @enable_time: Time taken for initial enable of regulator (in uS). |
|
* @off_on_delay: guard time (in uS), before re-enabling a regulator |
|
* |
|
* @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; |
|
const char *regulators_node; |
|
int (*of_parse_cb)(struct device_node *, |
|
const struct regulator_desc *, |
|
struct regulator_config *); |
|
int id; |
|
bool continuous_voltage_range; |
|
unsigned n_voltages; |
|
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 regulator_linear_range *linear_ranges; |
|
int n_linear_ranges; |
|
|
|
const unsigned int *volt_table; |
|
|
|
unsigned int vsel_reg; |
|
unsigned int vsel_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 enable_time; |
|
|
|
unsigned int off_on_delay; |
|
|
|
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_gpio_initialized: GPIO controlling regulator enable was properly |
|
* initialized, meaning that >= 0 is a valid gpio |
|
* identifier and < 0 is a non existent gpio. |
|
* @ena_gpio: GPIO controlling regulator enable. |
|
* @ena_gpio_invert: Sense for GPIO enable control. |
|
* @ena_gpio_flags: Flags to use when calling gpio_request_one() |
|
*/ |
|
struct regulator_config { |
|
struct device *dev; |
|
const struct regulator_init_data *init_data; |
|
void *driver_data; |
|
struct device_node *of_node; |
|
struct regmap *regmap; |
|
|
|
bool ena_gpio_initialized; |
|
int ena_gpio; |
|
unsigned int ena_gpio_invert:1; |
|
unsigned int ena_gpio_flags; |
|
}; |
|
|
|
/* |
|
* 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 blocking_notifier_head notifier; |
|
struct mutex mutex; /* consumer lock */ |
|
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; |
|
int deferred_disables; |
|
|
|
void *reg_data; /* regulator_dev data */ |
|
|
|
struct dentry *debugfs; |
|
|
|
struct regulator_enable_gpio *ena_pin; |
|
unsigned int ena_gpio_state:1; |
|
|
|
/* time when this regulator was disabled last time */ |
|
unsigned long last_off_jiffy; |
|
}; |
|
|
|
struct regulator_dev * |
|
regulator_register(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); |
|
void devm_regulator_unregister(struct device *dev, struct regulator_dev *rdev); |
|
|
|
int regulator_notifier_call_chain(struct regulator_dev *rdev, |
|
unsigned long event, void *data); |
|
|
|
void *rdev_get_drvdata(struct regulator_dev *rdev); |
|
struct device *rdev_get_dev(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_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_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_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); |
|
|
|
void *regulator_get_init_drvdata(struct regulator_init_data *reg_init_data); |
|
|
|
#endif
|
|
|