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