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.
24 struct device_attribute dev_attr;
27 struct iio_chan_spec const *c;
30 #define to_iio_dev_attr(_dev_attr) \
31 container_of(_dev_attr, struct iio_dev_attr, dev_attr)
33 ssize_t iio_read_const_attr(struct device *dev,
34 struct device_attribute *attr,
38 * struct iio_const_attr - constant device specific attribute
39 * often used for things like available modes
40 * @string: attribute string
41 * @dev_attr: underlying device attribute
43 struct iio_const_attr {
45 struct device_attribute dev_attr;
48 #define to_iio_const_attr(_dev_attr) \
49 container_of(_dev_attr, struct iio_const_attr, dev_attr)
51 /* Some attributes will be hard coded (device dependent) and not require an
52 address, in these cases pass a negative */
53 #define IIO_ATTR(_name, _mode, _show, _store, _addr) \
54 { .dev_attr = __ATTR(_name, _mode, _show, _store), \
57 #define IIO_DEVICE_ATTR(_name, _mode, _show, _store, _addr) \
58 struct iio_dev_attr iio_dev_attr_##_name \
59 = IIO_ATTR(_name, _mode, _show, _store, _addr)
61 #define IIO_DEVICE_ATTR_NAMED(_vname, _name, _mode, _show, _store, _addr) \
62 struct iio_dev_attr iio_dev_attr_##_vname \
63 = IIO_ATTR(_name, _mode, _show, _store, _addr)
65 #define IIO_CONST_ATTR(_name, _string) \
66 struct iio_const_attr iio_const_attr_##_name \
67 = { .string = _string, \
68 .dev_attr = __ATTR(_name, S_IRUGO, iio_read_const_attr, NULL)}
70 #define IIO_CONST_ATTR_NAMED(_vname, _name, _string) \
71 struct iio_const_attr iio_const_attr_##_vname \
72 = { .string = _string, \
73 .dev_attr = __ATTR(_name, S_IRUGO, iio_read_const_attr, NULL)}
75 /* Generic attributes of onetype or another */
78 * IIO_DEV_ATTR_SAMP_FREQ - sets any internal clock frequency
79 * @_mode: sysfs file mode/permissions
80 * @_show: output method for the attribute
81 * @_store: input method for the attribute
83 #define IIO_DEV_ATTR_SAMP_FREQ(_mode, _show, _store) \
84 IIO_DEVICE_ATTR(sampling_frequency, _mode, _show, _store, 0)
87 * IIO_DEV_ATTR_SAMP_FREQ_AVAIL - list available sampling frequencies
88 * @_show: output method for the attribute
90 * May be mode dependent on some devices
92 #define IIO_DEV_ATTR_SAMP_FREQ_AVAIL(_show) \
93 IIO_DEVICE_ATTR(sampling_frequency_available, S_IRUGO, _show, NULL, 0)
95 * IIO_CONST_ATTR_SAMP_FREQ_AVAIL - list available sampling frequencies
96 * @_string: frequency string for the attribute
100 #define IIO_CONST_ATTR_SAMP_FREQ_AVAIL(_string) \
101 IIO_CONST_ATTR(sampling_frequency_available, _string)
104 * IIO_DEV_ATTR_INT_TIME_AVAIL - list available integration times
105 * @_show: output method for the attribute
107 #define IIO_DEV_ATTR_INT_TIME_AVAIL(_show) \
108 IIO_DEVICE_ATTR(integration_time_available, S_IRUGO, _show, NULL, 0)
110 * IIO_CONST_ATTR_INT_TIME_AVAIL - list available integration times
111 * @_string: frequency string for the attribute
115 #define IIO_CONST_ATTR_INT_TIME_AVAIL(_string) \
116 IIO_CONST_ATTR(integration_time_available, _string)
118 #define IIO_DEV_ATTR_TEMP_RAW(_show) \
119 IIO_DEVICE_ATTR(in_temp_raw, S_IRUGO, _show, NULL, 0)
121 #define IIO_CONST_ATTR_TEMP_OFFSET(_string) \
122 IIO_CONST_ATTR(in_temp_offset, _string)
124 #define IIO_CONST_ATTR_TEMP_SCALE(_string) \
125 IIO_CONST_ATTR(in_temp_scale, _string)
127 #endif /* _INDUSTRIAL_IO_SYSFS_H_ */