1 /* SPDX-License-Identifier: GPL-2.0-only */ 2 /* The industrial I/O core function defs. 3 * 4 * Copyright (c) 2008 Jonathan Cameron 5 * 6 * These definitions are meant for use only within the IIO core, not individual 7 * drivers. 8 */ 9 10 #ifndef _IIO_CORE_H_ 11 #define _IIO_CORE_H_ 12 #include <linux/kernel.h> 13 #include <linux/device.h> 14 15 struct iio_chan_spec; 16 struct iio_dev; 17 18 extern struct device_type iio_device_type; 19 20 int __iio_add_chan_devattr(const char *postfix, 21 struct iio_chan_spec const *chan, 22 ssize_t (*func)(struct device *dev, 23 struct device_attribute *attr, 24 char *buf), 25 ssize_t (*writefunc)(struct device *dev, 26 struct device_attribute *attr, 27 const char *buf, 28 size_t len), 29 u64 mask, 30 enum iio_shared_by shared_by, 31 struct device *dev, 32 struct list_head *attr_list); 33 void iio_free_chan_devattr_list(struct list_head *attr_list); 34 35 ssize_t iio_format_value(char *buf, unsigned int type, int size, int *vals); 36 37 /* Event interface flags */ 38 #define IIO_BUSY_BIT_POS 1 39 40 #ifdef CONFIG_IIO_BUFFER 41 struct poll_table_struct; 42 43 __poll_t iio_buffer_poll(struct file *filp, 44 struct poll_table_struct *wait); 45 ssize_t iio_buffer_read_outer(struct file *filp, char __user *buf, 46 size_t n, loff_t *f_ps); 47 48 int iio_buffer_alloc_sysfs_and_mask(struct iio_dev *indio_dev); 49 void iio_buffer_free_sysfs_and_mask(struct iio_dev *indio_dev); 50 51 #define iio_buffer_poll_addr (&iio_buffer_poll) 52 #define iio_buffer_read_outer_addr (&iio_buffer_read_outer) 53 54 void iio_disable_all_buffers(struct iio_dev *indio_dev); 55 void iio_buffer_wakeup_poll(struct iio_dev *indio_dev); 56 57 #else 58 59 #define iio_buffer_poll_addr NULL 60 #define iio_buffer_read_outer_addr NULL 61 62 static inline int iio_buffer_alloc_sysfs_and_mask(struct iio_dev *indio_dev) 63 { 64 return 0; 65 } 66 67 static inline void iio_buffer_free_sysfs_and_mask(struct iio_dev *indio_dev) {} 68 69 static inline void iio_disable_all_buffers(struct iio_dev *indio_dev) {} 70 static inline void iio_buffer_wakeup_poll(struct iio_dev *indio_dev) {} 71 72 #endif 73 74 int iio_device_register_eventset(struct iio_dev *indio_dev); 75 void iio_device_unregister_eventset(struct iio_dev *indio_dev); 76 void iio_device_wakeup_eventset(struct iio_dev *indio_dev); 77 int iio_event_getfd(struct iio_dev *indio_dev); 78 79 struct iio_event_interface; 80 bool iio_event_enabled(const struct iio_event_interface *ev_int); 81 82 #endif 83