1 /* The industrial I/O core
3 *Copyright (c) 2008 Jonathan Cameron
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 as published by
7 * the Free Software Foundation.
12 #ifndef _INDUSTRIAL_IO_SYSFS_H_
13 #define _INDUSTRIAL_IO_SYSFS_H_
18 * struct iio_dev_attr - iio specific device attribute
19 * @dev_attr: underlying device attribute
20 * @address: associated register address
21 * @l: list head for maintaining list of dynamically created attrs
22 * @c: specification for the underlying channel
25 struct device_attribute dev_attr;
28 struct iio_chan_spec const *c;
31 #define to_iio_dev_attr(_dev_attr) \
32 container_of(_dev_attr, struct iio_dev_attr, dev_attr)
34 ssize_t iio_read_const_attr(struct device *dev,
35 struct device_attribute *attr,
39 * struct iio_const_attr - constant device specific attribute
40 * often used for things like available modes
41 * @string: attribute string
42 * @dev_attr: underlying device attribute
44 struct iio_const_attr {
46 struct device_attribute dev_attr;
49 #define to_iio_const_attr(_dev_attr) \
50 container_of(_dev_attr, struct iio_const_attr, dev_attr)
52 /* Some attributes will be hard coded (device dependent) and not require an
53 address, in these cases pass a negative */
54 #define IIO_ATTR(_name, _mode, _show, _store, _addr) \
55 { .dev_attr = __ATTR(_name, _mode, _show, _store), \
58 #define IIO_ATTR_RO(_name, _addr) \
59 { .dev_attr = __ATTR_RO(_name), \
62 #define IIO_ATTR_WO(_name, _addr) \
63 { .dev_attr = __ATTR_WO(_name), \
66 #define IIO_ATTR_RW(_name, _addr) \
67 { .dev_attr = __ATTR_RW(_name), \
70 #define IIO_DEVICE_ATTR(_name, _mode, _show, _store, _addr) \
71 struct iio_dev_attr iio_dev_attr_##_name \
72 = IIO_ATTR(_name, _mode, _show, _store, _addr)
74 #define IIO_DEVICE_ATTR_RO(_name, _addr) \
75 struct iio_dev_attr iio_dev_attr_##_name \
76 = IIO_ATTR_RO(_name, _addr)
78 #define IIO_DEVICE_ATTR_WO(_name, _addr) \
79 struct iio_dev_attr iio_dev_attr_##_name \
80 = IIO_ATTR_WO(_name, _addr)
82 #define IIO_DEVICE_ATTR_RW(_name, _addr) \
83 struct iio_dev_attr iio_dev_attr_##_name \
84 = IIO_ATTR_RW(_name, _addr)
86 #define IIO_DEVICE_ATTR_NAMED(_vname, _name, _mode, _show, _store, _addr) \
87 struct iio_dev_attr iio_dev_attr_##_vname \
88 = IIO_ATTR(_name, _mode, _show, _store, _addr)
90 #define IIO_CONST_ATTR(_name, _string) \
91 struct iio_const_attr iio_const_attr_##_name \
92 = { .string = _string, \
93 .dev_attr = __ATTR(_name, S_IRUGO, iio_read_const_attr, NULL)}
95 #define IIO_CONST_ATTR_NAMED(_vname, _name, _string) \
96 struct iio_const_attr iio_const_attr_##_vname \
97 = { .string = _string, \
98 .dev_attr = __ATTR(_name, S_IRUGO, iio_read_const_attr, NULL)}
100 /* Generic attributes of onetype or another */
103 * IIO_DEV_ATTR_SAMP_FREQ - sets any internal clock frequency
104 * @_mode: sysfs file mode/permissions
105 * @_show: output method for the attribute
106 * @_store: input method for the attribute
108 #define IIO_DEV_ATTR_SAMP_FREQ(_mode, _show, _store) \
109 IIO_DEVICE_ATTR(sampling_frequency, _mode, _show, _store, 0)
112 * IIO_DEV_ATTR_SAMP_FREQ_AVAIL - list available sampling frequencies
113 * @_show: output method for the attribute
115 * May be mode dependent on some devices
117 #define IIO_DEV_ATTR_SAMP_FREQ_AVAIL(_show) \
118 IIO_DEVICE_ATTR(sampling_frequency_available, S_IRUGO, _show, NULL, 0)
120 * IIO_CONST_ATTR_SAMP_FREQ_AVAIL - list available sampling frequencies
121 * @_string: frequency string for the attribute
125 #define IIO_CONST_ATTR_SAMP_FREQ_AVAIL(_string) \
126 IIO_CONST_ATTR(sampling_frequency_available, _string)
129 * IIO_DEV_ATTR_INT_TIME_AVAIL - list available integration times
130 * @_show: output method for the attribute
132 #define IIO_DEV_ATTR_INT_TIME_AVAIL(_show) \
133 IIO_DEVICE_ATTR(integration_time_available, S_IRUGO, _show, NULL, 0)
135 * IIO_CONST_ATTR_INT_TIME_AVAIL - list available integration times
136 * @_string: frequency string for the attribute
140 #define IIO_CONST_ATTR_INT_TIME_AVAIL(_string) \
141 IIO_CONST_ATTR(integration_time_available, _string)
143 #define IIO_DEV_ATTR_TEMP_RAW(_show) \
144 IIO_DEVICE_ATTR(in_temp_raw, S_IRUGO, _show, NULL, 0)
146 #define IIO_CONST_ATTR_TEMP_OFFSET(_string) \
147 IIO_CONST_ATTR(in_temp_offset, _string)
149 #define IIO_CONST_ATTR_TEMP_SCALE(_string) \
150 IIO_CONST_ATTR(in_temp_scale, _string)
152 #endif /* _INDUSTRIAL_IO_SYSFS_H_ */