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*l4( (  fB- i_I|+/* 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)} /* Generic attributes of onetype or another */ /** * IIO_DEV_ATTR_SAMP_FREQ - sets any inte