1 /* The industrial I/O core 2 * 3 *Copyright (c) 2008 Jonathan Cameron 4 * 5 * This program is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 as published by 7 * the Free Software Foundation. 8 * 9 * General attributes 10 */ 11 12 #ifndef _INDUSTRIAL_IO_SYSFS_H_ 13 #define _INDUSTRIAL_IO_SYSFS_H_ 14 15 struct iio_chan_spec; 16 17 /** 18 * struct iio_dev_attr - iio specific device attribute 19 * @dev_attr: underlying device attribute 20 * @address: associated register address 21 * @l: list head for maintaining list of dynamically created attrs. 22 */ 23 struct iio_dev_attr { 24 struct device_attribute dev_attr; 25 u64 address; 26 struct list_head l; 27 struct iio_chan_spec const *c; 28 }; 29 30 #define to_iio_dev_attr(_dev_attr) \ 31 container_of(_dev_attr, struct iio_dev_attr, dev_attr) 32 33 ssize_t iio_read_const_attr(struct device *dev, 34 struct device_attribute *attr, 35 char *len); 36 37 /** 38 * struct iio_const_attr - constant device specific attribute 39 * often used for things like available modes 40 * @string: attribute string 41 * @dev_attr: underlying device attribute 42 */ 43 struct iio_const_attr { 44 const char *string; 45 struct device_attribute dev_attr; 46 }; 47 48 #define to_iio_const_attr(_dev_attr) \ 49 container_of(_dev_attr, struct iio_const_attr, dev_attr) 50 51 /* Some attributes will be hard coded (device dependent) and not require an 52 address, in these cases pass a negative */ 53 #define IIO_ATTR(_name, _mode, _show, _store, _addr) \ 54 { .dev_attr = __ATTR(_name, _mode, _show, _store), \ 55 .address = _addr } 56 57 #define IIO_DEVICE_ATTR(_name, _mode, _show, _store, _addr) \ 58 struct iio_dev_attr iio_dev_attr_##_name \ 59 = IIO_ATTR(_name, _mode, _show, _store, _addr) 60 61 #define IIO_DEVICE_ATTR_NAMED(_vname, _name, _mode, _show, _store, _addr) \ 62 struct iio_dev_attr iio_dev_attr_##_vname \ 63 = IIO_ATTR(_name, _mode, _show, _store, _addr) 64 65 #define IIO_CONST_ATTR(_name, _string) \ 66 struct iio_const_attr iio_const_attr_##_name \ 67 = { .string = _string, \ 68 .dev_attr = __ATTR(_name, S_IRUGO, iio_read_const_attr, NULL)} 69 70 #define IIO_CONST_ATTR_NAMED(_vname, _name, _string) \ 71 struct iio_const_attr iio_const_attr_##_vname \ 72 = { .string = _string, \ 73 .dev_attr = __ATTR(_name, S_IRUGO, iio_read_const_attr, NULL)} 74 75 /* Generic attributes of onetype or another */ 76 /** 77 * IIO_DEV_ATTR_RESET: resets the device 78 **/ 79 #define IIO_DEV_ATTR_RESET(_store) \ 80 IIO_DEVICE_ATTR(reset, S_IWUSR, NULL, _store, 0) 81 82 /** 83 * IIO_DEV_ATTR_SAMP_FREQ - sets any internal clock frequency 84 * @_mode: sysfs file mode/permissions 85 * @_show: output method for the attribute 86 * @_store: input method for the attribute 87 **/ 88 #define IIO_DEV_ATTR_SAMP_FREQ(_mode, _show, _store) \ 89 IIO_DEVICE_ATTR(sampling_frequency, _mode, _show, _store, 0) 90 91 /** 92 * IIO_DEV_ATTR_SAMP_FREQ_AVAIL - list available sampling frequencies 93 * @_show: output method for the attribute 94 * 95 * May be mode dependent on some devices 96 **/ 97 #define IIO_DEV_ATTR_SAMP_FREQ_AVAIL(_show) \ 98 IIO_DEVICE_ATTR(sampling_frequency_available, S_IRUGO, _show, NULL, 0) 99 /** 100 * IIO_CONST_ATTR_AVAIL_SAMP_FREQ - list available sampling frequencies 101 * @_string: frequency string for the attribute 102 * 103 * Constant version 104 **/ 105 #define IIO_CONST_ATTR_SAMP_FREQ_AVAIL(_string) \ 106 IIO_CONST_ATTR(sampling_frequency_available, _string) 107 108 #define IIO_DEV_ATTR_TEMP_RAW(_show) \ 109 IIO_DEVICE_ATTR(in_temp_raw, S_IRUGO, _show, NULL, 0) 110 111 #define IIO_CONST_ATTR_TEMP_OFFSET(_string) \ 112 IIO_CONST_ATTR(in_temp_offset, _string) 113 114 #define IIO_CONST_ATTR_TEMP_SCALE(_string) \ 115 IIO_CONST_ATTR(in_temp_scale, _string) 116 117 #endif /* _INDUSTRIAL_IO_SYSFS_H_ */ 118