1 /* SPDX-License-Identifier: GPL-2.0-only */ 1
2 /* The industrial I/O core, trigger handling f
3 *
4 * Copyright (c) 2008 Jonathan Cameron
5 */
6 #include <linux/irq.h>
7 #include <linux/module.h>
8 #include <linux/atomic.h>
9
10 #ifndef _IIO_TRIGGER_H_
11 #define _IIO_TRIGGER_H_
12
13 #ifdef CONFIG_IIO_TRIGGER
14 struct iio_subirq {
15 bool enabled;
16 };
17
18 struct iio_dev;
19 struct iio_trigger;
20
21 /**
22 * struct iio_trigger_ops - operations structu
23 * @set_trigger_state: switch on/off the trig
24 * @reenable: function to reenable t
25 * use count is zero (may
26 * @validate_device: function to validate t
27 * current trigger gets c
28 *
29 * This is typically static const within a dri
30 * instances of a given device.
31 **/
32 struct iio_trigger_ops {
33 int (*set_trigger_state)(struct iio_tr
34 void (*reenable)(struct iio_trigger *t
35 int (*validate_device)(struct iio_trig
36 struct iio_dev
37 };
38
39
40 /**
41 * struct iio_trigger - industrial I/O trigger
42 * @ops: [DRIVER] operations st
43 * @owner: [INTERN] owner of this
44 * @id: [INTERN] unique id num
45 * @name: [DRIVER] unique name
46 * @dev: [DRIVER] associated de
47 * @list: [INTERN] used in maint
48 * @alloc_list: [DRIVER] used for driv
49 * @use_count: [INTERN] use count for
50 * @subirq_chip: [INTERN] associate 'vi
51 * @subirq_base: [INTERN] base number f
52 * @subirqs: [INTERN] information a
53 * @pool: [INTERN] bitmap of irq
54 * @pool_lock: [INTERN] protection of
55 * @attached_own_device:[INTERN] if we are usi
56 * i.e. if we registered
57 * device as the one prov
58 * @reenable_work: [INTERN] work item use
59 **/
60 struct iio_trigger {
61 const struct iio_trigger_ops *ops;
62 struct module *owner
63 int id;
64 const char *name;
65 struct device dev;
66
67 struct list_head list;
68 struct list_head alloc_
69 atomic_t use_co
70
71 struct irq_chip subirq
72 int subirq
73
74 struct iio_subirq subirqs[CONFIG_IIO_C
75 unsigned long pool[BITS_TO_LONGS(CONFI
76 struct mutex pool_l
77 bool attach
78 struct work_struct reenab
79 };
80
81
82 static inline struct iio_trigger *to_iio_trigg
83 {
84 return container_of(d, struct iio_trig
85 }
86
87 static inline void iio_trigger_put(struct iio_
88 {
89 module_put(trig->owner);
90 put_device(&trig->dev);
91 }
92
93 static inline struct iio_trigger *iio_trigger_
94 {
95 get_device(&trig->dev);
96
97 WARN_ONCE(list_empty(&trig->list),
98 "Getting non-registered iio
99 trig->name);
100
101 __module_get(trig->owner);
102
103 return trig;
104 }
105
106 /**
107 * iio_trigger_set_drvdata() - Set trigger dri
108 * @trig: IIO trigger structure
109 * @data: Driver specific data
110 *
111 * Allows to attach an arbitrary pointer to an
112 * retrieved by iio_trigger_get_drvdata().
113 */
114 static inline void iio_trigger_set_drvdata(str
115 {
116 dev_set_drvdata(&trig->dev, data);
117 }
118
119 /**
120 * iio_trigger_get_drvdata() - Get trigger dri
121 * @trig: IIO trigger structure
122 *
123 * Returns the data previously set with iio_tr
124 */
125 static inline void *iio_trigger_get_drvdata(st
126 {
127 return dev_get_drvdata(&trig->dev);
128 }
129
130 /**
131 * iio_trigger_register() - register a trigger
132 * @trig_info: trigger to be registered
133 **/
134 int iio_trigger_register(struct iio_trigger *t
135
136 int devm_iio_trigger_register(struct device *d
137 struct iio_trigg
138
139 /**
140 * iio_trigger_unregister() - unregister a tri
141 * @trig_info: trigger to be unregistered
142 **/
143 void iio_trigger_unregister(struct iio_trigger
144
145 /**
146 * iio_trigger_set_immutable() - set an immuta
147 *
148 * @indio_dev: IIO device structure containing
149 * @trig: trigger to assign to device
150 *
151 **/
152 int iio_trigger_set_immutable(struct iio_dev *
153
154 void iio_trigger_poll(struct iio_trigger *trig
155 void iio_trigger_poll_nested(struct iio_trigge
156
157 irqreturn_t iio_trigger_generic_data_rdy_poll(
158
159 #define iio_trigger_alloc(parent, fmt, ...) \
160 __iio_trigger_alloc((parent), THIS_MOD
161
162 __printf(3, 4)
163 struct iio_trigger *__iio_trigger_alloc(struct
164 struct
165 const
166 void iio_trigger_free(struct iio_trigger *trig
167
168 /**
169 * iio_trigger_using_own() - tells us if we us
170 * @indio_dev: device to check
171 */
172 bool iio_trigger_using_own(struct iio_dev *ind
173
174 int iio_validate_own_trigger(struct iio_dev *i
175 int iio_trigger_validate_own_device(struct iio
176 struct ii
177
178 #else
179 struct iio_trigger;
180 struct iio_trigger_ops;
181 #endif
182 #endif /* _IIO_TRIGGER_H_ */
183
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