1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
|
/*
* 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 <linux/pinctrl/pinctrl-state.h>
struct device;
struct pinctrl_dev;
struct pinctrl_map;
struct pinmux_ops;
struct pinconf_ops;
struct gpio_chip;
struct device_node;
/**
* 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 if pins == NULL
* @pins: enumeration of pins in GPIO range or NULL
* @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 const *pins;
unsigned int npins;
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 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);
int (*dt_node_to_map) (struct pinctrl_dev *pctldev,
struct device_node *np_config,
struct pinctrl_map **map, unsigned *num_maps);
void (*dt_free_map) (struct pinctrl_dev *pctldev,
struct pinctrl_map *map, unsigned 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
*/
struct pinctrl_desc {
const char *name;
struct pinctrl_pin_desc const *pins;
unsigned int npins;
const struct pinctrl_ops *pctlops;
const struct pinmux_ops *pmxops;
const 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_add_gpio_ranges(struct pinctrl_dev *pctldev,
struct pinctrl_gpio_range *ranges,
unsigned 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);
#ifdef CONFIG_OF
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);
#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 */
|
