diff options
Diffstat (limited to 'include/linux/regulator/driver.h')
| -rw-r--r-- | include/linux/regulator/driver.h | 229 |
1 files changed, 229 insertions, 0 deletions
diff --git a/include/linux/regulator/driver.h b/include/linux/regulator/driver.h new file mode 100644 index 00000000..fa8b55b8 --- /dev/null +++ b/include/linux/regulator/driver.h @@ -0,0 +1,229 @@ +/* + * 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 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 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_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 consumer.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. + * @supply_name: Identifying the regulator supply + * @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; + const char *supply_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 */ + + /* 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 */ + + struct delayed_work disable_work; + int deferred_disables; + + void *reg_data; /* regulator_dev data */ + + struct dentry *debugfs; +}; + +struct regulator_dev *regulator_register(struct regulator_desc *regulator_desc, + struct device *dev, const struct regulator_init_data *init_data, + void *driver_data, struct device_node *of_node); +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 |