137 lines
4.5 KiB
C
137 lines
4.5 KiB
C
/*
|
|
* 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>
|
|
*
|
|
* License terms: GNU General Public License (GPL) version 2
|
|
*/
|
|
#ifndef __LINUX_PINCTRL_PINCTRL_H
|
|
#define __LINUX_PINCTRL_PINCTRL_H
|
|
|
|
#ifdef CONFIG_PINCTRL
|
|
|
|
#include <linux/radix-tree.h>
|
|
#include <linux/list.h>
|
|
#include <linux/seq_file.h>
|
|
#include "pinctrl-state.h"
|
|
|
|
struct device;
|
|
struct pinctrl_dev;
|
|
struct pinmux_ops;
|
|
struct pinconf_ops;
|
|
struct gpio_chip;
|
|
|
|
/**
|
|
* 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
|
|
*/
|
|
struct pinctrl_pin_desc {
|
|
unsigned number;
|
|
const char *name;
|
|
};
|
|
|
|
/* 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
|
|
* @npins: number of pins in the GPIO range, including the base number
|
|
* @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;
|
|
struct gpio_chip *gc;
|
|
};
|
|
|
|
/**
|
|
* struct pinctrl_ops - global pin control operations, to be implemented by
|
|
* pin controller drivers.
|
|
* @list_groups: list the number of selectable named groups available
|
|
* in this pinmux driver, the core will begin on 0 and call this
|
|
* repeatedly as long as it returns >= 0 to enumerate the groups
|
|
* @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
|
|
*/
|
|
struct pinctrl_ops {
|
|
int (*list_groups) (struct pinctrl_dev *pctldev, unsigned selector);
|
|
const char *(*get_group_name) (struct pinctrl_dev *pctldev,
|
|
unsigned selector);
|
|
int (*get_group_pins) (struct pinctrl_dev *pctldev,
|
|
unsigned selector,
|
|
const unsigned **pins,
|
|
unsigned *num_pins);
|
|
void (*pin_dbg_show) (struct pinctrl_dev *pctldev, struct seq_file *s,
|
|
unsigned offset);
|
|
};
|
|
|
|
/**
|
|
* 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
|
|
*/
|
|
struct pinctrl_desc {
|
|
const char *name;
|
|
struct pinctrl_pin_desc const *pins;
|
|
unsigned int npins;
|
|
struct pinctrl_ops *pctlops;
|
|
struct pinmux_ops *pmxops;
|
|
struct pinconf_ops *confops;
|
|
struct module *owner;
|
|
};
|
|
|
|
/* External interface to pin controller */
|
|
extern struct pinctrl_dev *pinctrl_register(struct pinctrl_desc *pctldesc,
|
|
struct device *dev, void *driver_data);
|
|
extern void pinctrl_unregister(struct pinctrl_dev *pctldev);
|
|
extern bool pin_is_valid(struct pinctrl_dev *pctldev, int pin);
|
|
extern void pinctrl_add_gpio_range(struct pinctrl_dev *pctldev,
|
|
struct pinctrl_gpio_range *range);
|
|
extern void pinctrl_remove_gpio_range(struct pinctrl_dev *pctldev,
|
|
struct pinctrl_gpio_range *range);
|
|
extern const char *pinctrl_dev_get_name(struct pinctrl_dev *pctldev);
|
|
extern void *pinctrl_dev_get_drvdata(struct pinctrl_dev *pctldev);
|
|
#else
|
|
|
|
struct pinctrl_dev;
|
|
|
|
/* Sufficiently stupid default functions when pinctrl is not in use */
|
|
static inline bool pin_is_valid(struct pinctrl_dev *pctldev, int pin)
|
|
{
|
|
return pin >= 0;
|
|
}
|
|
|
|
#endif /* !CONFIG_PINCTRL */
|
|
|
|
#endif /* __LINUX_PINCTRL_PINCTRL_H */
|