/* SPDX-License-Identifier: GPL-2.0-only */
/*
* Interface the pinctrl subsystem
*
* Copyright ( C ) 2011 ST - Ericsson SA
* Written on behalf of Linaro for ST - Ericsson
* This interface is used in the core to keep track of pins .
*
* Author : Linus Walleij < linus . walleij @ linaro . org >
*/
#ifndef __LINUX_PINCTRL_PINCTRL_H
#define __LINUX_PINCTRL_PINCTRL_H
#include <linux/types.h>
struct device;
struct device_node;
struct gpio_chip;
struct module;
struct seq_file;
struct pin_config_item;
struct pinconf_generic_params;
struct pinconf_ops;
struct pinctrl_dev;
struct pinctrl_map;
struct pinmux_ops;
/**
* struct pingroup - provides information on pingroup
* @ name : a name for pingroup
* @ pins : an array of pins in the pingroup
* @ npins : number of pins in the pingroup
*/
struct pingroup {
const char *name;
const unsigned int *pins;
size_t npins;
};
/* Convenience macro to define a single named or anonymous pingroup */
#define PINCTRL_PINGROUP(_name, _pins, _npins) \
(struct pingroup) { \
.name = _name, \
.pins = _pins, \
.npins = _npins, \
}
/**
* struct pinctrl_pin_desc - boards / machines provide information on their
* pins , pads or other muxable units in this struct
* @ number : unique pin number from the global pin number space
* @ name : a name for this pin
* @ drv_data : driver - defined per - pin data . pinctrl core does not touch this
*/
struct pinctrl_pin_desc {
unsigned int number;
const char *name;
void *drv_data;
};
/* Convenience macro to define a single named or anonymous pin descriptor */
#define PINCTRL_PIN(a, b) { .number = a, .name = b }
#define PINCTRL_PIN_ANON(a) { .number = a }
/**
* struct pinctrl_gpio_range - each pin controller can provide subranges of
* the GPIO number space to be handled by the controller
* @ node : list node for internal use
* @ name : a name for the chip in this range
* @ id : an ID number for the chip in this range
* @ base : base offset of the GPIO range
* @ pin_base : base pin number of the GPIO range if pins = = NULL
* @ npins : number of pins in the GPIO range , including the base number
* @ pins : enumeration of pins in GPIO range or NULL
* @ gc : an optional pointer to a gpio_chip
*/
struct pinctrl_gpio_range {
struct list_head node;
const char *name;
unsigned int id;
unsigned int base;
unsigned int pin_base;
unsigned int npins;
unsigned int const *pins;
struct gpio_chip *gc;
};
/**
* struct pinctrl_ops - global pin control operations , to be implemented by
* pin controller drivers .
* @ get_groups_count : Returns the count of total number of groups registered .
* @ get_group_name : return the group name of the pin group
* @ get_group_pins : return an array of pins corresponding to a certain
* group selector @ pins , and the size of the array in @ num_pins
* @ pin_dbg_show : optional debugfs display hook that will provide per - device
* info for a certain pin in debugfs
* @ dt_node_to_map : parse a device tree " pin configuration node " , and create
* mapping table entries for it . These are returned through the @ map and
* @ num_maps output parameters . This function is optional , and may be
* omitted for pinctrl drivers that do not support device tree .
* @ dt_free_map : free mapping table entries created via @ dt_node_to_map . The
* top - level @ map pointer must be freed , along with any dynamically
* allocated members of the mapping table entries themselves . This
* function is optional , and may be omitted for pinctrl drivers that do
* not support device tree .
*/
struct pinctrl_ops {
int (*get_groups_count) (struct pinctrl_dev *pctldev);
const char *(*get_group_name) (struct pinctrl_dev *pctldev,
unsigned int selector);
int (*get_group_pins) (struct pinctrl_dev *pctldev,
unsigned int selector,
const unsigned int **pins,
unsigned int *num_pins);
void (*pin_dbg_show) (struct pinctrl_dev *pctldev, struct seq_file *s,
unsigned int offset);
int (*dt_node_to_map) (struct pinctrl_dev *pctldev,
struct device_node *np_config,
struct pinctrl_map **map, unsigned int *num_maps);
void (*dt_free_map) (struct pinctrl_dev *pctldev,
struct pinctrl_map *map, unsigned int num_maps);
};
/**
* struct pinctrl_desc - pin controller descriptor , register this to pin
* control subsystem
* @ name : name for the pin controller
* @ pins : an array of pin descriptors describing all the pins handled by
* this pin controller
* @ npins : number of descriptors in the array , usually just ARRAY_SIZE ( )
* of the pins field above
* @ pctlops : pin control operation vtable , to support global concepts like
* grouping of pins , this is optional .
* @ pmxops : pinmux operations vtable , if you support pinmuxing in your driver
* @ confops : pin config operations vtable , if you support pin configuration in
* your driver
* @ owner : module providing the pin controller , used for refcounting
* @ num_custom_params : Number of driver - specific custom parameters to be parsed
* from the hardware description
* @ custom_params : List of driver_specific custom parameters to be parsed from
* the hardware description
* @ custom_conf_items : Information how to print @ params in debugfs , must be
* the same size as the @ custom_params , i . e . @ num_custom_params
* @ link_consumers : If true create a device link between pinctrl and its
* consumers ( i . e . the devices requesting pin control states ) . This is
* sometimes necessary to ascertain the right suspend / resume order for
* example .
*/
struct pinctrl_desc {
const char *name;
const struct pinctrl_pin_desc *pins;
unsigned int npins;
const struct pinctrl_ops *pctlops;
const struct pinmux_ops *pmxops;
const struct pinconf_ops *confops;
struct module *owner;
#ifdef CONFIG_GENERIC_PINCONF
unsigned int num_custom_params;
const struct pinconf_generic_params *custom_params;
const struct pin_config_item *custom_conf_items;
#endif
bool link_consumers;
};
/* External interface to pin controller */
extern int pinctrl_register_and_init(const struct pinctrl_desc *pctldesc,
struct device *dev, void *driver_data,
struct pinctrl_dev **pctldev);
extern int pinctrl_enable(struct pinctrl_dev *pctldev);
/* Please use pinctrl_register_and_init() and pinctrl_enable() instead */
extern struct pinctrl_dev *pinctrl_register(const struct pinctrl_desc *pctldesc,
struct device *dev, void *driver_data);
extern void pinctrl_unregister(struct pinctrl_dev *pctldev);
extern int devm_pinctrl_register_and_init(struct device *dev,
const struct pinctrl_desc *pctldesc,
void *driver_data,
struct pinctrl_dev **pctldev);
/* Please use devm_pinctrl_register_and_init() instead */
extern struct pinctrl_dev *devm_pinctrl_register(struct device *dev,
const struct pinctrl_desc *pctldesc,
void *driver_data);
extern void devm_pinctrl_unregister(struct device *dev,
struct pinctrl_dev *pctldev);
extern void pinctrl_add_gpio_range(struct pinctrl_dev *pctldev,
struct pinctrl_gpio_range *range);
extern void pinctrl_add_gpio_ranges(struct pinctrl_dev *pctldev,
struct pinctrl_gpio_range *ranges,
unsigned int nranges);
extern void pinctrl_remove_gpio_range(struct pinctrl_dev *pctldev,
struct pinctrl_gpio_range *range);
extern struct pinctrl_dev *pinctrl_find_and_add_gpio_range(const char *devname,
struct pinctrl_gpio_range *range);
extern struct pinctrl_gpio_range *
pinctrl_find_gpio_range_from_pin(struct pinctrl_dev *pctldev,
unsigned int pin);
extern int pinctrl_get_group_pins(struct pinctrl_dev *pctldev,
const char *pin_group, const unsigned int **pins,
unsigned int *num_pins);
/**
* struct pinfunction - Description about a function
* @ name : Name of the function
* @ groups : An array of groups for this function
* @ ngroups : Number of groups in @ groups
*/
struct pinfunction {
const char *name;
const char * const *groups;
size_t ngroups;
};
/* Convenience macro to define a single named pinfunction */
#define PINCTRL_PINFUNCTION(_name, _groups, _ngroups) \
(struct pinfunction) { \
.name = (_name), \
.groups = (_groups), \
.ngroups = (_ngroups), \
}
#if IS_ENABLED(CONFIG_OF) && IS_ENABLED(CONFIG_PINCTRL)
extern struct pinctrl_dev *of_pinctrl_get(struct device_node *np);
#else
static inline
struct pinctrl_dev *of_pinctrl_get(struct device_node *np)
{
return NULL;
}
#endif /* CONFIG_OF */
extern const char *pinctrl_dev_get_name(struct pinctrl_dev *pctldev);
extern const char *pinctrl_dev_get_devname(struct pinctrl_dev *pctldev);
extern void *pinctrl_dev_get_drvdata(struct pinctrl_dev *pctldev);
#endif /* __LINUX_PINCTRL_PINCTRL_H */
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