784 lines
31 KiB
C
784 lines
31 KiB
C
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/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* driver.h -- SoC Regulator driver support.
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*
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* Copyright (C) 2007, 2008 Wolfson Microelectronics PLC.
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*
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* Author: Liam Girdwood <lrg@slimlogic.co.uk>
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*
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* Regulator Driver Interface.
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*/
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#ifndef __LINUX_REGULATOR_DRIVER_H_
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#define __LINUX_REGULATOR_DRIVER_H_
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#include <linux/device.h>
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#include <linux/linear_range.h>
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#include <linux/notifier.h>
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#include <linux/regulator/consumer.h>
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#include <linux/ww_mutex.h>
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struct gpio_desc;
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struct regmap;
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struct regulator_dev;
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struct regulator_config;
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struct regulator_init_data;
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struct regulator_enable_gpio;
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enum regulator_status {
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REGULATOR_STATUS_OFF,
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REGULATOR_STATUS_ON,
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REGULATOR_STATUS_ERROR,
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/* fast/normal/idle/standby are flavors of "on" */
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REGULATOR_STATUS_FAST,
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REGULATOR_STATUS_NORMAL,
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REGULATOR_STATUS_IDLE,
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REGULATOR_STATUS_STANDBY,
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/* The regulator is enabled but not regulating */
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REGULATOR_STATUS_BYPASS,
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/* in case that any other status doesn't apply */
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REGULATOR_STATUS_UNDEFINED,
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};
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enum regulator_detection_severity {
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/* Hardware shut down voltage outputs if condition is detected */
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REGULATOR_SEVERITY_PROT,
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/* Hardware is probably damaged/inoperable */
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REGULATOR_SEVERITY_ERR,
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/* Hardware is still recoverable but recovery action must be taken */
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REGULATOR_SEVERITY_WARN,
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};
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/* Initialize struct linear_range for regulators */
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#define REGULATOR_LINEAR_RANGE(_min_uV, _min_sel, _max_sel, _step_uV) \
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{ \
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.min = _min_uV, \
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.min_sel = _min_sel, \
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.max_sel = _max_sel, \
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.step = _step_uV, \
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}
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/**
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* struct regulator_ops - regulator operations.
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*
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* @enable: Configure the regulator as enabled.
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* @disable: Configure the regulator as disabled.
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* @is_enabled: Return 1 if the regulator is enabled, 0 if not.
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* May also return negative errno.
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*
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* @set_voltage: Set the voltage for the regulator within the range specified.
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* The driver should select the voltage closest to min_uV.
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* @set_voltage_sel: Set the voltage for the regulator using the specified
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* selector.
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* @map_voltage: Convert a voltage into a selector
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* @get_voltage: Return the currently configured voltage for the regulator;
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* return -ENOTRECOVERABLE if regulator can't be read at
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* bootup and hasn't been set yet.
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* @get_voltage_sel: Return the currently configured voltage selector for the
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* regulator; return -ENOTRECOVERABLE if regulator can't
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* be read at bootup and hasn't been set yet.
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* @list_voltage: Return one of the supported voltages, in microvolts; zero
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* if the selector indicates a voltage that is unusable on this system;
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* or negative errno. Selectors range from zero to one less than
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* regulator_desc.n_voltages. Voltages may be reported in any order.
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*
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* @set_current_limit: Configure a limit for a current-limited regulator.
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* The driver should select the current closest to max_uA.
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* @get_current_limit: Get the configured limit for a current-limited regulator.
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* @set_input_current_limit: Configure an input limit.
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*
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* @set_over_current_protection: Support enabling of and setting limits for over
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* current situation detection. Detection can be configured for three
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* levels of severity.
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*
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* - REGULATOR_SEVERITY_PROT should automatically shut down the regulator(s).
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*
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* - REGULATOR_SEVERITY_ERR should indicate that over-current situation is
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* caused by an unrecoverable error but HW does not perform
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* automatic shut down.
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*
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* - REGULATOR_SEVERITY_WARN should indicate situation where hardware is
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* still believed to not be damaged but that a board sepcific
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* recovery action is needed. If lim_uA is 0 the limit should not
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* be changed but the detection should just be enabled/disabled as
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* is requested.
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*
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* @set_over_voltage_protection: Support enabling of and setting limits for over
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* voltage situation detection. Detection can be configured for same
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* severities as over current protection. Units of uV.
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* @set_under_voltage_protection: Support enabling of and setting limits for
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* under voltage situation detection. Detection can be configured for same
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* severities as over current protection. Units of uV.
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* @set_thermal_protection: Support enabling of and setting limits for over
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* temperature situation detection.Detection can be configured for same
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* severities as over current protection. Units of degree Kelvin.
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*
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* @set_active_discharge: Set active discharge enable/disable of regulators.
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*
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* @set_mode: Set the configured operating mode for the regulator.
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* @get_mode: Get the configured operating mode for the regulator.
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* @get_error_flags: Get the current error(s) for the regulator.
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* @get_status: Return actual (not as-configured) status of regulator, as a
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* REGULATOR_STATUS value (or negative errno)
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* @get_optimum_mode: Get the most efficient operating mode for the regulator
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* when running with the specified parameters.
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* @set_load: Set the load for the regulator.
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*
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* @set_bypass: Set the regulator in bypass mode.
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* @get_bypass: Get the regulator bypass mode state.
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*
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* @enable_time: Time taken for the regulator voltage output voltage to
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* stabilise after being enabled, in microseconds.
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* @set_ramp_delay: Set the ramp delay for the regulator. The driver should
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* select ramp delay equal to or less than(closest) ramp_delay.
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* @set_voltage_time: Time taken for the regulator voltage output voltage
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* to stabilise after being set to a new value, in microseconds.
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* The function receives the from and to voltage as input, it
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* should return the worst case.
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* @set_voltage_time_sel: Time taken for the regulator voltage output voltage
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* to stabilise after being set to a new value, in microseconds.
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* The function receives the from and to voltage selector as
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* input, it should return the worst case.
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* @set_soft_start: Enable soft start for the regulator.
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*
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* @set_suspend_voltage: Set the voltage for the regulator when the system
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* is suspended.
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* @set_suspend_enable: Mark the regulator as enabled when the system is
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* suspended.
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* @set_suspend_disable: Mark the regulator as disabled when the system is
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* suspended.
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* @set_suspend_mode: Set the operating mode for the regulator when the
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* system is suspended.
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* @resume: Resume operation of suspended regulator.
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* @set_pull_down: Configure the regulator to pull down when the regulator
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* is disabled.
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*
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* This struct describes regulator operations which can be implemented by
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* regulator chip drivers.
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*/
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struct regulator_ops {
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/* enumerate supported voltages */
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int (*list_voltage) (struct regulator_dev *, unsigned selector);
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/* get/set regulator voltage */
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int (*set_voltage) (struct regulator_dev *, int min_uV, int max_uV,
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unsigned *selector);
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int (*map_voltage)(struct regulator_dev *, int min_uV, int max_uV);
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int (*set_voltage_sel) (struct regulator_dev *, unsigned selector);
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int (*get_voltage) (struct regulator_dev *);
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int (*get_voltage_sel) (struct regulator_dev *);
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/* get/set regulator current */
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int (*set_current_limit) (struct regulator_dev *,
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int min_uA, int max_uA);
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int (*get_current_limit) (struct regulator_dev *);
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int (*set_input_current_limit) (struct regulator_dev *, int lim_uA);
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int (*set_over_current_protection)(struct regulator_dev *, int lim_uA,
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int severity, bool enable);
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int (*set_over_voltage_protection)(struct regulator_dev *, int lim_uV,
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int severity, bool enable);
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int (*set_under_voltage_protection)(struct regulator_dev *, int lim_uV,
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int severity, bool enable);
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int (*set_thermal_protection)(struct regulator_dev *, int lim,
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int severity, bool enable);
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int (*set_active_discharge)(struct regulator_dev *, bool enable);
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/* enable/disable regulator */
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int (*enable) (struct regulator_dev *);
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int (*disable) (struct regulator_dev *);
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int (*is_enabled) (struct regulator_dev *);
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/* get/set regulator operating mode (defined in consumer.h) */
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int (*set_mode) (struct regulator_dev *, unsigned int mode);
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unsigned int (*get_mode) (struct regulator_dev *);
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/* retrieve current error flags on the regulator */
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int (*get_error_flags)(struct regulator_dev *, unsigned int *flags);
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/* Time taken to enable or set voltage on the regulator */
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int (*enable_time) (struct regulator_dev *);
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int (*set_ramp_delay) (struct regulator_dev *, int ramp_delay);
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int (*set_voltage_time) (struct regulator_dev *, int old_uV,
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int new_uV);
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int (*set_voltage_time_sel) (struct regulator_dev *,
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unsigned int old_selector,
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unsigned int new_selector);
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int (*set_soft_start) (struct regulator_dev *);
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/* report regulator status ... most other accessors report
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* control inputs, this reports results of combining inputs
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* from Linux (and other sources) with the actual load.
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* returns REGULATOR_STATUS_* or negative errno.
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*/
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int (*get_status)(struct regulator_dev *);
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/* get most efficient regulator operating mode for load */
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unsigned int (*get_optimum_mode) (struct regulator_dev *, int input_uV,
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int output_uV, int load_uA);
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/* set the load on the regulator */
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int (*set_load)(struct regulator_dev *, int load_uA);
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/* control and report on bypass mode */
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int (*set_bypass)(struct regulator_dev *dev, bool enable);
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int (*get_bypass)(struct regulator_dev *dev, bool *enable);
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/* the operations below are for configuration of regulator state when
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* its parent PMIC enters a global STANDBY/HIBERNATE state */
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/* set regulator suspend voltage */
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int (*set_suspend_voltage) (struct regulator_dev *, int uV);
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/* enable/disable regulator in suspend state */
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int (*set_suspend_enable) (struct regulator_dev *);
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int (*set_suspend_disable) (struct regulator_dev *);
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/* set regulator suspend operating mode (defined in consumer.h) */
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int (*set_suspend_mode) (struct regulator_dev *, unsigned int mode);
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int (*resume)(struct regulator_dev *rdev);
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int (*set_pull_down) (struct regulator_dev *);
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};
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/*
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* Regulators can either control voltage or current.
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*/
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enum regulator_type {
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REGULATOR_VOLTAGE,
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REGULATOR_CURRENT,
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};
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/**
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* struct regulator_desc - Static regulator descriptor
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*
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* Each regulator registered with the core is described with a
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* structure of this type and a struct regulator_config. This
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* structure contains the non-varying parts of the regulator
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* description.
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*
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* @name: Identifying name for the regulator.
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* @supply_name: Identifying the regulator supply
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* @of_match: Name used to identify regulator in DT.
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* @of_match_full_name: A flag to indicate that the of_match string, if
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* present, should be matched against the node full_name.
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* @regulators_node: Name of node containing regulator definitions in DT.
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* @of_parse_cb: Optional callback called only if of_match is present.
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* Will be called for each regulator parsed from DT, during
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* init_data parsing.
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* The regulator_config passed as argument to the callback will
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* be a copy of config passed to regulator_register, valid only
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* for this particular call. Callback may freely change the
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* config but it cannot store it for later usage.
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* Callback should return 0 on success or negative ERRNO
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* indicating failure.
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* @id: Numerical identifier for the regulator.
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* @ops: Regulator operations table.
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* @irq: Interrupt number for the regulator.
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* @type: Indicates if the regulator is a voltage or current regulator.
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* @owner: Module providing the regulator, used for refcounting.
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*
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* @continuous_voltage_range: Indicates if the regulator can set any
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* voltage within constrains range.
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* @n_voltages: Number of selectors available for ops.list_voltage().
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* @n_current_limits: Number of selectors available for current limits
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*
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* @min_uV: Voltage given by the lowest selector (if linear mapping)
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* @uV_step: Voltage increase with each selector (if linear mapping)
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* @linear_min_sel: Minimal selector for starting linear mapping
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* @fixed_uV: Fixed voltage of rails.
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* @ramp_delay: Time to settle down after voltage change (unit: uV/us)
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* @min_dropout_uV: The minimum dropout voltage this regulator can handle
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* @linear_ranges: A constant table of possible voltage ranges.
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* @linear_range_selectors: A constant table of voltage range selectors.
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* If pickable ranges are used each range must
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* have corresponding selector here.
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* @n_linear_ranges: Number of entries in the @linear_ranges (and in
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* linear_range_selectors if used) table(s).
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* @volt_table: Voltage mapping table (if table based mapping)
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* @curr_table: Current limit mapping table (if table based mapping)
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*
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* @vsel_range_reg: Register for range selector when using pickable ranges
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* and ``regulator_map_*_voltage_*_pickable`` functions.
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* @vsel_range_mask: Mask for register bitfield used for range selector
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* @vsel_reg: Register for selector when using ``regulator_map_*_voltage_*``
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* @vsel_mask: Mask for register bitfield used for selector
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* @vsel_step: Specify the resolution of selector stepping when setting
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* voltage. If 0, then no stepping is done (requested selector is
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* set directly), if >0 then the regulator API will ramp the
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* voltage up/down gradually each time increasing/decreasing the
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* selector by the specified step value.
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* @csel_reg: Register for current limit selector using regmap set_current_limit
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* @csel_mask: Mask for register bitfield used for current limit selector
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* @apply_reg: Register for initiate voltage change on the output when
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* using regulator_set_voltage_sel_regmap
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* @apply_bit: Register bitfield used for initiate voltage change on the
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* output when using regulator_set_voltage_sel_regmap
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* @enable_reg: Register for control when using regmap enable/disable ops
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* @enable_mask: Mask for control when using regmap enable/disable ops
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* @enable_val: Enabling value for control when using regmap enable/disable ops
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* @disable_val: Disabling value for control when using regmap enable/disable ops
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* @enable_is_inverted: A flag to indicate set enable_mask bits to disable
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* when using regulator_enable_regmap and friends APIs.
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* @bypass_reg: Register for control when using regmap set_bypass
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* @bypass_mask: Mask for control when using regmap set_bypass
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* @bypass_val_on: Enabling value for control when using regmap set_bypass
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* @bypass_val_off: Disabling value for control when using regmap set_bypass
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* @active_discharge_off: Enabling value for control when using regmap
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* set_active_discharge
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* @active_discharge_on: Disabling value for control when using regmap
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* set_active_discharge
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|
|
* @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 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;
|
||
|
|
|
||
|
|
int n_linear_ranges;
|
||
|
|
|
||
|
|
const unsigned int *volt_table;
|
||
|
|
const unsigned int *curr_table;
|
||
|
|
|
||
|
|
unsigned int vsel_range_reg;
|
||
|
|
unsigned int vsel_range_mask;
|
||
|
|
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_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
|