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12#ifndef GPIOLIB_H
13#define GPIOLIB_H
14
15#include <linux/gpio/driver.h>
16#include <linux/err.h>
17#include <linux/device.h>
18#include <linux/module.h>
19#include <linux/cdev.h>
20
21enum of_gpio_flags;
22enum gpiod_flags;
23enum gpio_lookup_flags;
24struct acpi_device;
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51struct gpio_device {
52 int id;
53 struct device dev;
54 struct cdev chrdev;
55 struct device *mockdev;
56 struct module *owner;
57 struct gpio_chip *chip;
58 struct gpio_desc *descs;
59 int base;
60 u16 ngpio;
61 char *label;
62 void *data;
63 struct list_head list;
64
65#ifdef CONFIG_PINCTRL
66
67
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70
71
72 struct list_head pin_ranges;
73#endif
74};
75
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81
82struct acpi_gpio_info {
83 bool gpioint;
84 int polarity;
85 int triggering;
86};
87
88
89static const char * const gpio_suffixes[] = { "gpios", "gpio" };
90
91#ifdef CONFIG_OF_GPIO
92struct gpio_desc *of_find_gpio(struct device *dev,
93 const char *con_id,
94 unsigned int idx,
95 enum gpio_lookup_flags *flags);
96struct gpio_desc *of_get_named_gpiod_flags(struct device_node *np,
97 const char *list_name, int index, enum of_gpio_flags *flags);
98int of_gpiochip_add(struct gpio_chip *gc);
99void of_gpiochip_remove(struct gpio_chip *gc);
100#else
101static inline struct gpio_desc *of_find_gpio(struct device *dev,
102 const char *con_id,
103 unsigned int idx,
104 enum gpio_lookup_flags *flags)
105{
106 return ERR_PTR(-ENOENT);
107}
108static inline struct gpio_desc *of_get_named_gpiod_flags(struct device_node *np,
109 const char *list_name, int index, enum of_gpio_flags *flags)
110{
111 return ERR_PTR(-ENOENT);
112}
113static inline int of_gpiochip_add(struct gpio_chip *gc) { return 0; }
114static inline void of_gpiochip_remove(struct gpio_chip *gc) { }
115#endif
116
117#ifdef CONFIG_ACPI
118void acpi_gpiochip_add(struct gpio_chip *chip);
119void acpi_gpiochip_remove(struct gpio_chip *chip);
120
121void acpi_gpiochip_request_interrupts(struct gpio_chip *chip);
122void acpi_gpiochip_free_interrupts(struct gpio_chip *chip);
123
124struct gpio_desc *acpi_find_gpio(struct device *dev,
125 const char *con_id,
126 unsigned int idx,
127 enum gpiod_flags flags,
128 enum gpio_lookup_flags *lookupflags);
129struct gpio_desc *acpi_node_get_gpiod(struct fwnode_handle *fwnode,
130 const char *propname, int index,
131 struct acpi_gpio_info *info);
132
133int acpi_gpio_count(struct device *dev, const char *con_id);
134
135bool acpi_can_fallback_to_crs(struct acpi_device *adev, const char *con_id);
136#else
137static inline void acpi_gpiochip_add(struct gpio_chip *chip) { }
138static inline void acpi_gpiochip_remove(struct gpio_chip *chip) { }
139
140static inline void
141acpi_gpiochip_request_interrupts(struct gpio_chip *chip) { }
142
143static inline void
144acpi_gpiochip_free_interrupts(struct gpio_chip *chip) { }
145
146static inline struct gpio_desc *
147acpi_find_gpio(struct device *dev, const char *con_id,
148 unsigned int idx, enum gpiod_flags flags,
149 enum gpio_lookup_flags *lookupflags)
150{
151 return ERR_PTR(-ENOENT);
152}
153static inline struct gpio_desc *
154acpi_node_get_gpiod(struct fwnode_handle *fwnode, const char *propname,
155 int index, struct acpi_gpio_info *info)
156{
157 return ERR_PTR(-ENXIO);
158}
159static inline int acpi_gpio_count(struct device *dev, const char *con_id)
160{
161 return -ENODEV;
162}
163
164static inline bool acpi_can_fallback_to_crs(struct acpi_device *adev,
165 const char *con_id)
166{
167 return false;
168}
169#endif
170
171struct gpio_desc *gpiochip_get_desc(struct gpio_chip *chip, u16 hwnum);
172void gpiod_set_array_value_complex(bool raw, bool can_sleep,
173 unsigned int array_size,
174 struct gpio_desc **desc_array,
175 int *value_array);
176
177extern struct spinlock gpio_lock;
178extern struct list_head gpio_devices;
179
180struct gpio_desc {
181 struct gpio_device *gdev;
182 unsigned long flags;
183
184#define FLAG_REQUESTED 0
185#define FLAG_IS_OUT 1
186#define FLAG_EXPORT 2
187#define FLAG_SYSFS 3
188#define FLAG_ACTIVE_LOW 6
189#define FLAG_OPEN_DRAIN 7
190#define FLAG_OPEN_SOURCE 8
191#define FLAG_USED_AS_IRQ 9
192#define FLAG_IS_HOGGED 11
193
194
195 const char *label;
196
197 const char *name;
198};
199
200int gpiod_request(struct gpio_desc *desc, const char *label);
201void gpiod_free(struct gpio_desc *desc);
202int gpiod_hog(struct gpio_desc *desc, const char *name,
203 unsigned long lflags, enum gpiod_flags dflags);
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207
208static int __maybe_unused gpio_chip_hwgpio(const struct gpio_desc *desc)
209{
210 return desc - &desc->gdev->descs[0];
211}
212
213void devprop_gpiochip_set_names(struct gpio_chip *chip);
214
215
216
217#define gpiod_emerg(desc, fmt, ...) \
218 pr_emerg("gpio-%d (%s): " fmt, desc_to_gpio(desc), desc->label ? : "?",\
219 ##__VA_ARGS__)
220#define gpiod_crit(desc, fmt, ...) \
221 pr_crit("gpio-%d (%s): " fmt, desc_to_gpio(desc), desc->label ? : "?", \
222 ##__VA_ARGS__)
223#define gpiod_err(desc, fmt, ...) \
224 pr_err("gpio-%d (%s): " fmt, desc_to_gpio(desc), desc->label ? : "?", \
225 ##__VA_ARGS__)
226#define gpiod_warn(desc, fmt, ...) \
227 pr_warn("gpio-%d (%s): " fmt, desc_to_gpio(desc), desc->label ? : "?", \
228 ##__VA_ARGS__)
229#define gpiod_info(desc, fmt, ...) \
230 pr_info("gpio-%d (%s): " fmt, desc_to_gpio(desc), desc->label ? : "?", \
231 ##__VA_ARGS__)
232#define gpiod_dbg(desc, fmt, ...) \
233 pr_debug("gpio-%d (%s): " fmt, desc_to_gpio(desc), desc->label ? : "?",\
234 ##__VA_ARGS__)
235
236
237
238#define chip_emerg(chip, fmt, ...) \
239 dev_emerg(&chip->gpiodev->dev, "(%s): " fmt, chip->label, ##__VA_ARGS__)
240#define chip_crit(chip, fmt, ...) \
241 dev_crit(&chip->gpiodev->dev, "(%s): " fmt, chip->label, ##__VA_ARGS__)
242#define chip_err(chip, fmt, ...) \
243 dev_err(&chip->gpiodev->dev, "(%s): " fmt, chip->label, ##__VA_ARGS__)
244#define chip_warn(chip, fmt, ...) \
245 dev_warn(&chip->gpiodev->dev, "(%s): " fmt, chip->label, ##__VA_ARGS__)
246#define chip_info(chip, fmt, ...) \
247 dev_info(&chip->gpiodev->dev, "(%s): " fmt, chip->label, ##__VA_ARGS__)
248#define chip_dbg(chip, fmt, ...) \
249 dev_dbg(&chip->gpiodev->dev, "(%s): " fmt, chip->label, ##__VA_ARGS__)
250
251#ifdef CONFIG_GPIO_SYSFS
252
253int gpiochip_sysfs_register(struct gpio_device *gdev);
254void gpiochip_sysfs_unregister(struct gpio_device *gdev);
255
256#else
257
258static inline int gpiochip_sysfs_register(struct gpio_device *gdev)
259{
260 return 0;
261}
262
263static inline void gpiochip_sysfs_unregister(struct gpio_device *gdev)
264{
265}
266
267#endif
268
269#endif
270