1 /* SPDX-License-Identifier: GPL-2.0-only */ 1 /* SPDX-License-Identifier: GPL-2.0-only */
2 /* 2 /*
3 * Interface the pinctrl subsystem 3 * Interface the pinctrl subsystem
4 * 4 *
5 * Copyright (C) 2011 ST-Ericsson SA 5 * Copyright (C) 2011 ST-Ericsson SA
6 * Written on behalf of Linaro for ST-Ericsson 6 * Written on behalf of Linaro for ST-Ericsson
7 * This interface is used in the core to keep 7 * This interface is used in the core to keep track of pins.
8 * 8 *
9 * Author: Linus Walleij <linus.walleij@linaro 9 * Author: Linus Walleij <linus.walleij@linaro.org>
10 */ 10 */
11 #ifndef __LINUX_PINCTRL_PINCTRL_H 11 #ifndef __LINUX_PINCTRL_PINCTRL_H
12 #define __LINUX_PINCTRL_PINCTRL_H 12 #define __LINUX_PINCTRL_PINCTRL_H
13 13
14 #include <linux/types.h> !! 14 #include <linux/radix-tree.h>
>> 15 #include <linux/list.h>
>> 16 #include <linux/seq_file.h>
>> 17 #include <linux/pinctrl/pinctrl-state.h>
>> 18 #include <linux/pinctrl/devinfo.h>
15 19
16 struct device; 20 struct device;
17 struct device_node; <<
18 struct gpio_chip; <<
19 struct module; <<
20 struct seq_file; <<
21 <<
22 struct pin_config_item; <<
23 struct pinconf_generic_params; <<
24 struct pinconf_ops; <<
25 struct pinctrl_dev; 21 struct pinctrl_dev;
26 struct pinctrl_map; 22 struct pinctrl_map;
27 struct pinmux_ops; 23 struct pinmux_ops;
28 !! 24 struct pinconf_ops;
29 /** !! 25 struct pin_config_item;
30 * struct pingroup - provides information on p !! 26 struct gpio_chip;
31 * @name: a name for pingroup !! 27 struct device_node;
32 * @pins: an array of pins in the pingroup <<
33 * @npins: number of pins in the pingroup <<
34 */ <<
35 struct pingroup { <<
36 const char *name; <<
37 const unsigned int *pins; <<
38 size_t npins; <<
39 }; <<
40 <<
41 /* Convenience macro to define a single named <<
42 #define PINCTRL_PINGROUP(_name, _pins, _npins) <<
43 (struct pingroup) { <<
44 .name = _name, <<
45 .pins = _pins, <<
46 .npins = _npins, <<
47 } <<
48 28
49 /** 29 /**
50 * struct pinctrl_pin_desc - boards/machines p 30 * struct pinctrl_pin_desc - boards/machines provide information on their
51 * pins, pads or other muxable units in this s 31 * pins, pads or other muxable units in this struct
52 * @number: unique pin number from the global 32 * @number: unique pin number from the global pin number space
53 * @name: a name for this pin 33 * @name: a name for this pin
54 * @drv_data: driver-defined per-pin data. pin 34 * @drv_data: driver-defined per-pin data. pinctrl core does not touch this
55 */ 35 */
56 struct pinctrl_pin_desc { 36 struct pinctrl_pin_desc {
57 unsigned int number; !! 37 unsigned number;
58 const char *name; 38 const char *name;
59 void *drv_data; 39 void *drv_data;
60 }; 40 };
61 41
62 /* Convenience macro to define a single named 42 /* Convenience macro to define a single named or anonymous pin descriptor */
63 #define PINCTRL_PIN(a, b) { .number = a, .name 43 #define PINCTRL_PIN(a, b) { .number = a, .name = b }
64 #define PINCTRL_PIN_ANON(a) { .number = a } 44 #define PINCTRL_PIN_ANON(a) { .number = a }
65 45
66 /** 46 /**
67 * struct pinctrl_gpio_range - each pin contro 47 * struct pinctrl_gpio_range - each pin controller can provide subranges of
68 * the GPIO number space to be handled by the 48 * the GPIO number space to be handled by the controller
69 * @node: list node for internal use 49 * @node: list node for internal use
70 * @name: a name for the chip in this range 50 * @name: a name for the chip in this range
71 * @id: an ID number for the chip in this rang 51 * @id: an ID number for the chip in this range
72 * @base: base offset of the GPIO range 52 * @base: base offset of the GPIO range
73 * @pin_base: base pin number of the GPIO rang 53 * @pin_base: base pin number of the GPIO range if pins == NULL
74 * @npins: number of pins in the GPIO range, i <<
75 * @pins: enumeration of pins in GPIO range or 54 * @pins: enumeration of pins in GPIO range or NULL
>> 55 * @npins: number of pins in the GPIO range, including the base number
76 * @gc: an optional pointer to a gpio_chip 56 * @gc: an optional pointer to a gpio_chip
77 */ 57 */
78 struct pinctrl_gpio_range { 58 struct pinctrl_gpio_range {
79 struct list_head node; 59 struct list_head node;
80 const char *name; 60 const char *name;
81 unsigned int id; 61 unsigned int id;
82 unsigned int base; 62 unsigned int base;
83 unsigned int pin_base; 63 unsigned int pin_base;
>> 64 unsigned const *pins;
84 unsigned int npins; 65 unsigned int npins;
85 unsigned int const *pins; <<
86 struct gpio_chip *gc; 66 struct gpio_chip *gc;
87 }; 67 };
88 68
89 /** 69 /**
90 * struct pinctrl_ops - global pin control ope 70 * struct pinctrl_ops - global pin control operations, to be implemented by
91 * pin controller drivers. 71 * pin controller drivers.
92 * @get_groups_count: Returns the count of tot 72 * @get_groups_count: Returns the count of total number of groups registered.
93 * @get_group_name: return the group name of t 73 * @get_group_name: return the group name of the pin group
94 * @get_group_pins: return an array of pins co 74 * @get_group_pins: return an array of pins corresponding to a certain
95 * group selector @pins, and the size of 75 * group selector @pins, and the size of the array in @num_pins
96 * @pin_dbg_show: optional debugfs display hoo 76 * @pin_dbg_show: optional debugfs display hook that will provide per-device
97 * info for a certain pin in debugfs 77 * info for a certain pin in debugfs
98 * @dt_node_to_map: parse a device tree "pin c 78 * @dt_node_to_map: parse a device tree "pin configuration node", and create
99 * mapping table entries for it. These ar 79 * mapping table entries for it. These are returned through the @map and
100 * @num_maps output parameters. This func 80 * @num_maps output parameters. This function is optional, and may be
101 * omitted for pinctrl drivers that do no 81 * omitted for pinctrl drivers that do not support device tree.
102 * @dt_free_map: free mapping table entries cr 82 * @dt_free_map: free mapping table entries created via @dt_node_to_map. The
103 * top-level @map pointer must be freed, 83 * top-level @map pointer must be freed, along with any dynamically
104 * allocated members of the mapping table 84 * allocated members of the mapping table entries themselves. This
105 * function is optional, and may be omitt 85 * function is optional, and may be omitted for pinctrl drivers that do
106 * not support device tree. 86 * not support device tree.
107 */ 87 */
108 struct pinctrl_ops { 88 struct pinctrl_ops {
109 int (*get_groups_count) (struct pinctr 89 int (*get_groups_count) (struct pinctrl_dev *pctldev);
110 const char *(*get_group_name) (struct 90 const char *(*get_group_name) (struct pinctrl_dev *pctldev,
111 unsigne !! 91 unsigned selector);
112 int (*get_group_pins) (struct pinctrl_ 92 int (*get_group_pins) (struct pinctrl_dev *pctldev,
113 unsigned int se !! 93 unsigned selector,
114 const unsigned !! 94 const unsigned **pins,
115 unsigned int *n !! 95 unsigned *num_pins);
116 void (*pin_dbg_show) (struct pinctrl_d 96 void (*pin_dbg_show) (struct pinctrl_dev *pctldev, struct seq_file *s,
117 unsigned int off !! 97 unsigned offset);
118 int (*dt_node_to_map) (struct pinctrl_ 98 int (*dt_node_to_map) (struct pinctrl_dev *pctldev,
119 struct device_n 99 struct device_node *np_config,
120 struct pinctrl_ !! 100 struct pinctrl_map **map, unsigned *num_maps);
121 void (*dt_free_map) (struct pinctrl_de 101 void (*dt_free_map) (struct pinctrl_dev *pctldev,
122 struct pinctrl_ma !! 102 struct pinctrl_map *map, unsigned num_maps);
123 }; 103 };
124 104
125 /** 105 /**
126 * struct pinctrl_desc - pin controller descri 106 * struct pinctrl_desc - pin controller descriptor, register this to pin
127 * control subsystem 107 * control subsystem
128 * @name: name for the pin controller 108 * @name: name for the pin controller
129 * @pins: an array of pin descriptors describi 109 * @pins: an array of pin descriptors describing all the pins handled by
130 * this pin controller 110 * this pin controller
131 * @npins: number of descriptors in the array, 111 * @npins: number of descriptors in the array, usually just ARRAY_SIZE()
132 * of the pins field above 112 * of the pins field above
133 * @pctlops: pin control operation vtable, to 113 * @pctlops: pin control operation vtable, to support global concepts like
134 * grouping of pins, this is optional. 114 * grouping of pins, this is optional.
135 * @pmxops: pinmux operations vtable, if you s 115 * @pmxops: pinmux operations vtable, if you support pinmuxing in your driver
136 * @confops: pin config operations vtable, if 116 * @confops: pin config operations vtable, if you support pin configuration in
137 * your driver 117 * your driver
138 * @owner: module providing the pin controller 118 * @owner: module providing the pin controller, used for refcounting
139 * @num_custom_params: Number of driver-specif 119 * @num_custom_params: Number of driver-specific custom parameters to be parsed
140 * from the hardware description 120 * from the hardware description
141 * @custom_params: List of driver_specific cus 121 * @custom_params: List of driver_specific custom parameters to be parsed from
142 * the hardware description 122 * the hardware description
143 * @custom_conf_items: Information how to prin 123 * @custom_conf_items: Information how to print @params in debugfs, must be
144 * the same size as the @custom_params, i 124 * the same size as the @custom_params, i.e. @num_custom_params
145 * @link_consumers: If true create a device li 125 * @link_consumers: If true create a device link between pinctrl and its
146 * consumers (i.e. the devices requesting 126 * consumers (i.e. the devices requesting pin control states). This is
147 * sometimes necessary to ascertain the r 127 * sometimes necessary to ascertain the right suspend/resume order for
148 * example. 128 * example.
149 */ 129 */
150 struct pinctrl_desc { 130 struct pinctrl_desc {
151 const char *name; 131 const char *name;
152 const struct pinctrl_pin_desc *pins; 132 const struct pinctrl_pin_desc *pins;
153 unsigned int npins; 133 unsigned int npins;
154 const struct pinctrl_ops *pctlops; 134 const struct pinctrl_ops *pctlops;
155 const struct pinmux_ops *pmxops; 135 const struct pinmux_ops *pmxops;
156 const struct pinconf_ops *confops; 136 const struct pinconf_ops *confops;
157 struct module *owner; 137 struct module *owner;
158 #ifdef CONFIG_GENERIC_PINCONF 138 #ifdef CONFIG_GENERIC_PINCONF
159 unsigned int num_custom_params; 139 unsigned int num_custom_params;
160 const struct pinconf_generic_params *c 140 const struct pinconf_generic_params *custom_params;
161 const struct pin_config_item *custom_c 141 const struct pin_config_item *custom_conf_items;
162 #endif 142 #endif
163 bool link_consumers; 143 bool link_consumers;
164 }; 144 };
165 145
166 /* External interface to pin controller */ 146 /* External interface to pin controller */
167 147
168 extern int pinctrl_register_and_init(struct pi 148 extern int pinctrl_register_and_init(struct pinctrl_desc *pctldesc,
169 struct de 149 struct device *dev, void *driver_data,
170 struct pi 150 struct pinctrl_dev **pctldev);
171 extern int pinctrl_enable(struct pinctrl_dev * 151 extern int pinctrl_enable(struct pinctrl_dev *pctldev);
172 152
173 /* Please use pinctrl_register_and_init() and 153 /* Please use pinctrl_register_and_init() and pinctrl_enable() instead */
174 extern struct pinctrl_dev *pinctrl_register(st 154 extern struct pinctrl_dev *pinctrl_register(struct pinctrl_desc *pctldesc,
175 struct device 155 struct device *dev, void *driver_data);
176 156
177 extern void pinctrl_unregister(struct pinctrl_ 157 extern void pinctrl_unregister(struct pinctrl_dev *pctldev);
178 158
179 extern int devm_pinctrl_register_and_init(stru 159 extern int devm_pinctrl_register_and_init(struct device *dev,
180 struct pinctrl 160 struct pinctrl_desc *pctldesc,
181 void *driver_d 161 void *driver_data,
182 struct pinctrl 162 struct pinctrl_dev **pctldev);
183 163
184 /* Please use devm_pinctrl_register_and_init() 164 /* Please use devm_pinctrl_register_and_init() instead */
185 extern struct pinctrl_dev *devm_pinctrl_regist 165 extern struct pinctrl_dev *devm_pinctrl_register(struct device *dev,
186 struct pinctrl 166 struct pinctrl_desc *pctldesc,
187 void *driver_d 167 void *driver_data);
188 168
189 extern void devm_pinctrl_unregister(struct dev 169 extern void devm_pinctrl_unregister(struct device *dev,
190 struct pinctrl 170 struct pinctrl_dev *pctldev);
191 171
192 extern void pinctrl_add_gpio_range(struct pinc 172 extern void pinctrl_add_gpio_range(struct pinctrl_dev *pctldev,
193 struct pinctrl 173 struct pinctrl_gpio_range *range);
194 extern void pinctrl_add_gpio_ranges(struct pin 174 extern void pinctrl_add_gpio_ranges(struct pinctrl_dev *pctldev,
195 struct pinctrl 175 struct pinctrl_gpio_range *ranges,
196 unsigned int n !! 176 unsigned nranges);
197 extern void pinctrl_remove_gpio_range(struct p 177 extern void pinctrl_remove_gpio_range(struct pinctrl_dev *pctldev,
198 struct pinctrl 178 struct pinctrl_gpio_range *range);
199 179
200 extern struct pinctrl_dev *pinctrl_find_and_ad 180 extern struct pinctrl_dev *pinctrl_find_and_add_gpio_range(const char *devname,
201 struct pinctrl_gpio_range *ran 181 struct pinctrl_gpio_range *range);
202 extern struct pinctrl_gpio_range * 182 extern struct pinctrl_gpio_range *
203 pinctrl_find_gpio_range_from_pin(struct pinctr 183 pinctrl_find_gpio_range_from_pin(struct pinctrl_dev *pctldev,
204 unsigned int 184 unsigned int pin);
205 extern int pinctrl_get_group_pins(struct pinct 185 extern int pinctrl_get_group_pins(struct pinctrl_dev *pctldev,
206 const char * !! 186 const char *pin_group, const unsigned **pins,
207 unsigned int !! 187 unsigned *num_pins);
208 <<
209 /** <<
210 * struct pinfunction - Description about a fu <<
211 * @name: Name of the function <<
212 * @groups: An array of groups for this functi <<
213 * @ngroups: Number of groups in @groups <<
214 */ <<
215 struct pinfunction { <<
216 const char *name; <<
217 const char * const *groups; <<
218 size_t ngroups; <<
219 }; <<
220 <<
221 /* Convenience macro to define a single named <<
222 #define PINCTRL_PINFUNCTION(_name, _groups, _n <<
223 (struct pinfunction) { <<
224 .name = (_name), <<
225 .groups = (_groups), <<
226 .ngroups = (_ngroups), <<
227 } <<
228 188
229 #if IS_ENABLED(CONFIG_OF) && IS_ENABLED(CONFIG 189 #if IS_ENABLED(CONFIG_OF) && IS_ENABLED(CONFIG_PINCTRL)
230 extern struct pinctrl_dev *of_pinctrl_get(stru 190 extern struct pinctrl_dev *of_pinctrl_get(struct device_node *np);
231 #else 191 #else
232 static inline 192 static inline
233 struct pinctrl_dev *of_pinctrl_get(struct devi 193 struct pinctrl_dev *of_pinctrl_get(struct device_node *np)
234 { 194 {
235 return NULL; 195 return NULL;
236 } 196 }
237 #endif /* CONFIG_OF */ 197 #endif /* CONFIG_OF */
238 198
239 extern const char *pinctrl_dev_get_name(struct 199 extern const char *pinctrl_dev_get_name(struct pinctrl_dev *pctldev);
240 extern const char *pinctrl_dev_get_devname(str 200 extern const char *pinctrl_dev_get_devname(struct pinctrl_dev *pctldev);
241 extern void *pinctrl_dev_get_drvdata(struct pi 201 extern void *pinctrl_dev_get_drvdata(struct pinctrl_dev *pctldev);
242 202
243 #endif /* __LINUX_PINCTRL_PINCTRL_H */ 203 #endif /* __LINUX_PINCTRL_PINCTRL_H */
244 204
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