/* * driver.h -- SoC Regulator driver support. * * Copyright (C) 2007, 2008 Wolfson Microelectronics PLC. * * Author: Liam Girdwood * * 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 #include struct regulator_dev; struct regulator_init_data; 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, }; /** * 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. * @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. * @get_current_limit: Get the configured limit for a current-limited regulator. * * @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. * * @enable_time: Time taken for the regulator voltage output voltage to * stabilise after being enabled, in microseconds. * @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_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. * * 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 (*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 *); /* 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 regulator.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_voltage_time_sel) (struct regulator_dev *, unsigned int old_selector, unsigned int new_selector); /* 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); /* 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 regulator.h) */ int (*set_suspend_mode) (struct regulator_dev *, unsigned int mode); }; /* * Regulators can either control voltage or current. */ enum regulator_type { REGULATOR_VOLTAGE, REGULATOR_CURRENT, }; /** * struct regulator_desc - Regulator descriptor * * Each regulator registered with the core is described with a structure of * this type. * * @name: Identifying name for the regulator. * @id: Numerical identifier for the regulator. * @n_voltages: Number of selectors available for ops.list_voltage(). * @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. */ struct regulator_desc { const char *name; int id; unsigned n_voltages; struct regulator_ops *ops; int irq; enum regulator_type type; struct module *owner; }; /* * 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 { struct regulator_desc *desc; int exclusive; u32 use_count; u32 open_count; /* lists we belong to */ struct list_head list; /* list of all regulators */ struct list_head slist; /* list of supplied regulators */ /* lists we own */ struct list_head consumer_list; /* consumers we supply */ struct list_head supply_list; /* regulators we supply */ struct blocking_notifier_head notifier; struct mutex mutex; /* consumer lock */ struct module *owner; struct device dev; struct regulation_constraints *constraints; struct regulator_dev *supply; /* for tree */ void *reg_data; /* regulator_dev data */ #ifdef CONFIG_DEBUG_FS struct dentry *debugfs; #endif }; struct regulator_dev *regulator_register(struct regulator_desc *regulator_desc, struct device *dev, const struct regulator_init_data *init_data, void *driver_data); void regulator_unregister(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); void *regulator_get_init_drvdata(struct regulator_init_data *reg_init_data); #endif