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128 lines
4.0 KiB
128 lines
4.0 KiB
/* 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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* @c: specification for the underlying channel |
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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_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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/** |
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* IIO_DEV_ATTR_INT_TIME_AVAIL - list available integration times |
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* @_show: output method for the attribute |
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**/ |
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#define IIO_DEV_ATTR_INT_TIME_AVAIL(_show) \ |
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IIO_DEVICE_ATTR(integration_time_available, S_IRUGO, _show, NULL, 0) |
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/** |
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* IIO_CONST_ATTR_INT_TIME_AVAIL - list available integration times |
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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_INT_TIME_AVAIL(_string) \ |
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IIO_CONST_ATTR(integration_time_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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