118 lines
3.6 KiB
C
118 lines
3.6 KiB
C
/* The industrial I/O core
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*
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*Copyright (c) 2008 Jonathan Cameron
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 as published by
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* the Free Software Foundation.
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*
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* General attributes
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*/
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#ifndef _INDUSTRIAL_IO_SYSFS_H_
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#define _INDUSTRIAL_IO_SYSFS_H_
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struct iio_chan_spec;
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/**
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* struct iio_dev_attr - iio specific device attribute
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* @dev_attr: underlying device attribute
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* @address: associated register address
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* @l: list head for maintaining list of dynamically created attrs.
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*/
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struct iio_dev_attr {
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struct device_attribute dev_attr;
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u64 address;
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struct list_head l;
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struct iio_chan_spec const *c;
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};
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#define to_iio_dev_attr(_dev_attr) \
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container_of(_dev_attr, struct iio_dev_attr, dev_attr)
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ssize_t iio_read_const_attr(struct device *dev,
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struct device_attribute *attr,
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char *len);
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/**
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* struct iio_const_attr - constant device specific attribute
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* often used for things like available modes
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* @string: attribute string
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* @dev_attr: underlying device attribute
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*/
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struct iio_const_attr {
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const char *string;
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struct device_attribute dev_attr;
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};
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#define to_iio_const_attr(_dev_attr) \
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container_of(_dev_attr, struct iio_const_attr, dev_attr)
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/* Some attributes will be hard coded (device dependent) and not require an
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address, in these cases pass a negative */
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#define IIO_ATTR(_name, _mode, _show, _store, _addr) \
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{ .dev_attr = __ATTR(_name, _mode, _show, _store), \
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.address = _addr }
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#define IIO_DEVICE_ATTR(_name, _mode, _show, _store, _addr) \
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struct iio_dev_attr iio_dev_attr_##_name \
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= IIO_ATTR(_name, _mode, _show, _store, _addr)
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#define IIO_DEVICE_ATTR_NAMED(_vname, _name, _mode, _show, _store, _addr) \
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struct iio_dev_attr iio_dev_attr_##_vname \
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= IIO_ATTR(_name, _mode, _show, _store, _addr)
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#define IIO_CONST_ATTR(_name, _string) \
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struct iio_const_attr iio_const_attr_##_name \
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= { .string = _string, \
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.dev_attr = __ATTR(_name, S_IRUGO, iio_read_const_attr, NULL)}
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#define IIO_CONST_ATTR_NAMED(_vname, _name, _string) \
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struct iio_const_attr iio_const_attr_##_vname \
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= { .string = _string, \
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.dev_attr = __ATTR(_name, S_IRUGO, iio_read_const_attr, NULL)}
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/* Generic attributes of onetype or another */
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/**
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* IIO_DEV_ATTR_RESET: resets the device
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**/
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#define IIO_DEV_ATTR_RESET(_store) \
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IIO_DEVICE_ATTR(reset, S_IWUSR, NULL, _store, 0)
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/**
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* IIO_DEV_ATTR_SAMP_FREQ - sets any internal clock frequency
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* @_mode: sysfs file mode/permissions
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* @_show: output method for the attribute
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* @_store: input method for the attribute
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**/
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#define IIO_DEV_ATTR_SAMP_FREQ(_mode, _show, _store) \
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IIO_DEVICE_ATTR(sampling_frequency, _mode, _show, _store, 0)
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/**
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* IIO_DEV_ATTR_SAMP_FREQ_AVAIL - list available sampling frequencies
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* @_show: output method for the attribute
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*
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* May be mode dependent on some devices
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**/
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#define IIO_DEV_ATTR_SAMP_FREQ_AVAIL(_show) \
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IIO_DEVICE_ATTR(sampling_frequency_available, S_IRUGO, _show, NULL, 0)
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/**
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* IIO_CONST_ATTR_SAMP_FREQ_AVAIL - list available sampling frequencies
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* @_string: frequency string for the attribute
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*
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* Constant version
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**/
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#define IIO_CONST_ATTR_SAMP_FREQ_AVAIL(_string) \
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IIO_CONST_ATTR(sampling_frequency_available, _string)
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#define IIO_DEV_ATTR_TEMP_RAW(_show) \
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IIO_DEVICE_ATTR(in_temp_raw, S_IRUGO, _show, NULL, 0)
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#define IIO_CONST_ATTR_TEMP_OFFSET(_string) \
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IIO_CONST_ATTR(in_temp_offset, _string)
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#define IIO_CONST_ATTR_TEMP_SCALE(_string) \
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IIO_CONST_ATTR(in_temp_scale, _string)
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#endif /* _INDUSTRIAL_IO_SYSFS_H_ */
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