diff options
Diffstat (limited to 'include/linux/iio/sysfs.h')
| -rw-r--r-- | include/linux/iio/sysfs.h | 19 |
1 files changed, 15 insertions, 4 deletions
diff --git a/include/linux/iio/sysfs.h b/include/linux/iio/sysfs.h index ce9426c507fd..de5bb125815c 100644 --- a/include/linux/iio/sysfs.h +++ b/include/linux/iio/sysfs.h @@ -1,17 +1,15 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ /* The industrial I/O core * *Copyright (c) 2008 Jonathan Cameron * - * This program is free software; you can redistribute it and/or modify it - * under the terms of the GNU General Public License version 2 as published by - * the Free Software Foundation. - * * General attributes */ #ifndef _INDUSTRIAL_IO_SYSFS_H_ #define _INDUSTRIAL_IO_SYSFS_H_ +struct iio_buffer; struct iio_chan_spec; /** @@ -20,12 +18,14 @@ struct iio_chan_spec; * @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) \ @@ -97,6 +97,17 @@ struct iio_const_attr { = { .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 */ /** |