/* SPDX-License-Identifier: GPL-2.0-only */
/* The industrial I/O core
*
* Copyright ( c ) 2008 Jonathan Cameron
*
* General attributes
*/
#ifndef _INDUSTRIAL_IO_SYSFS_H_
#define _INDUSTRIAL_IO_SYSFS_H_
struct iio_buffer;
struct iio_chan_spec;
/**
* struct iio_dev_attr - iio specific device attribute
* @ dev_attr : underlying device attribute
* @ address : associated register address
* @ l : list head for maintaining list of dynamically created attrs
* @ c : specification for the underlying channel
* @ buffer : the IIO buffer to which this attribute belongs to ( if any )
*/
struct iio_dev_attr {
struct device_attribute dev_attr;
u64 address;
struct list_head l;
struct iio_chan_spec const *c;
struct iio_buffer *buffer;
};
#define to_iio_dev_attr(_dev_attr) \
container_of(_dev_attr, struct iio_dev_attr, dev_attr)
ssize_t iio_read_const_attr(struct device *dev,
struct device_attribute *attr,
char *len);
/**
* struct iio_const_attr - constant device specific attribute
* often used for things like available modes
* @ string : attribute string
* @ dev_attr : underlying device attribute
*/
struct iio_const_attr {
const char *string;
struct device_attribute dev_attr;
};
#define to_iio_const_attr(_dev_attr) \
container_of(_dev_attr, struct iio_const_attr, dev_attr)
/* Some attributes will be hard coded (device dependent) and not require an
address, in these cases pass a negative */
#define IIO_ATTR(_name, _mode, _show, _store, _addr) \
{ .dev_attr = __ATTR(_name, _mode, _show, _store), \
.address = _addr }
#define IIO_ATTR_RO(_name, _addr) \
{ .dev_attr = __ATTR_RO(_name), \
.address = _addr }
#define IIO_ATTR_WO(_name, _addr) \
{ .dev_attr = __ATTR_WO(_name), \
.address = _addr }
#define IIO_ATTR_RW(_name, _addr) \
{ .dev_attr = __ATTR_RW(_name), \
.address = _addr }
#define IIO_DEVICE_ATTR(_name, _mode, _show, _store, _addr) \
struct iio_dev_attr iio_dev_attr_## _name \
= IIO_ATTR(_name, _mode, _show, _store, _addr)
#define IIO_DEVICE_ATTR_RO(_name, _addr) \
struct iio_dev_attr iio_dev_attr_## _name \
= IIO_ATTR_RO(_name, _addr)
#define IIO_DEVICE_ATTR_WO(_name, _addr) \
struct iio_dev_attr iio_dev_attr_## _name \
= IIO_ATTR_WO(_name, _addr)
#define IIO_DEVICE_ATTR_RW(_name, _addr) \
struct iio_dev_attr iio_dev_attr_## _name \
= IIO_ATTR_RW(_name, _addr)
#define IIO_DEVICE_ATTR_NAMED(_vname, _name, _mode, _show, _store, _addr) \
struct iio_dev_attr iio_dev_attr_## _vname \
= IIO_ATTR(_name, _mode, _show, _store, _addr)
#define IIO_CONST_ATTR(_name, _string) \
struct iio_const_attr iio_const_attr_## _name \
= { .string = _string, \
.dev_attr = __ATTR(_name, S_IRUGO, iio_read_const_attr, NULL)}
#define IIO_CONST_ATTR_NAMED(_vname, _name, _string) \
struct iio_const_attr iio_const_attr_## _vname \
= { .string = _string, \
.dev_attr = __ATTR(_name, S_IRUGO, iio_read_const_attr, NULL)}
#define IIO_STATIC_CONST_DEVICE_ATTR(_name, _string) \
static ssize_t iio_const_dev_attr_show_## _name( \
struct device *dev, \
struct device_attribute *attr, \
char *buf) \
{ \
return sysfs_emit(buf, "%s\n" , _string); \
} \
static IIO_DEVICE_ATTR(_name, 0444 , \
iio_const_dev_attr_show_## _name, NULL, 0 )
/* Generic attributes of onetype or another */
/**
* IIO_DEV_ATTR_SAMP_FREQ - sets any internal clock frequency
* @ _ mode : sysfs file mode / permissions
* @ _ show : output method for the attribute
* @ _ store : input method for the attribute
**/
#define IIO_DEV_ATTR_SAMP_FREQ(_mode, _show, _store) \
IIO_DEVICE_ATTR(sampling_frequency, _mode, _show, _store, 0 )
/**
* IIO_DEV_ATTR_SAMP_FREQ_AVAIL - list available sampling frequencies
* @ _ show : output method for the attribute
*
* May be mode dependent on some devices
**/
#define IIO_DEV_ATTR_SAMP_FREQ_AVAIL(_show) \
IIO_DEVICE_ATTR(sampling_frequency_available, S_IRUGO, _show, NULL, 0 )
/**
* IIO_CONST_ATTR_SAMP_FREQ_AVAIL - list available sampling frequencies
* @ _ string : frequency string for the attribute
*
* Constant version
**/
#define IIO_CONST_ATTR_SAMP_FREQ_AVAIL(_string) \
IIO_CONST_ATTR(sampling_frequency_available, _string)
/**
* IIO_DEV_ATTR_INT_TIME_AVAIL - list available integration times
* @ _ show : output method for the attribute
**/
#define IIO_DEV_ATTR_INT_TIME_AVAIL(_show) \
IIO_DEVICE_ATTR(integration_time_available, S_IRUGO, _show, NULL, 0 )
/**
* IIO_CONST_ATTR_INT_TIME_AVAIL - list available integration times
* @ _ string : frequency string for the attribute
*
* Constant version
**/
#define IIO_CONST_ATTR_INT_TIME_AVAIL(_string) \
IIO_CONST_ATTR(integration_time_available, _string)
#define IIO_DEV_ATTR_TEMP_RAW(_show) \
IIO_DEVICE_ATTR(in_temp_raw, S_IRUGO, _show, NULL, 0 )
#define IIO_CONST_ATTR_TEMP_OFFSET(_string) \
IIO_CONST_ATTR(in_temp_offset, _string)
#define IIO_CONST_ATTR_TEMP_SCALE(_string) \
IIO_CONST_ATTR(in_temp_scale, _string)
#endif /* _INDUSTRIAL_IO_SYSFS_H_ */
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