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3c33b7b826
The iio_device_type struct is never modified, mark it as const. This allows it to be placed in a read-only memory section, which will protect against accidental or deliberate modification. Signed-off-by: Lars-Peter Clausen <lars@metafoo.de> Link: https://lore.kernel.org/r/20211031080421.2086-1-lars@metafoo.de Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
111 lines
3.3 KiB
C
111 lines
3.3 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/* The industrial I/O core function defs.
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*
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* Copyright (c) 2008 Jonathan Cameron
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*
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* These definitions are meant for use only within the IIO core, not individual
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* drivers.
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*/
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#ifndef _IIO_CORE_H_
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#define _IIO_CORE_H_
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#include <linux/kernel.h>
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#include <linux/device.h>
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struct iio_buffer;
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struct iio_chan_spec;
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struct iio_dev;
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extern const struct device_type iio_device_type;
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struct iio_dev_buffer_pair {
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struct iio_dev *indio_dev;
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struct iio_buffer *buffer;
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};
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#define IIO_IOCTL_UNHANDLED 1
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struct iio_ioctl_handler {
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struct list_head entry;
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long (*ioctl)(struct iio_dev *indio_dev, struct file *filp,
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unsigned int cmd, unsigned long arg);
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};
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long iio_device_ioctl(struct iio_dev *indio_dev, struct file *filp,
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unsigned int cmd, unsigned long arg);
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void iio_device_ioctl_handler_register(struct iio_dev *indio_dev,
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struct iio_ioctl_handler *h);
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void iio_device_ioctl_handler_unregister(struct iio_ioctl_handler *h);
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int __iio_add_chan_devattr(const char *postfix,
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struct iio_chan_spec const *chan,
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ssize_t (*func)(struct device *dev,
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struct device_attribute *attr,
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char *buf),
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ssize_t (*writefunc)(struct device *dev,
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struct device_attribute *attr,
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const char *buf,
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size_t len),
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u64 mask,
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enum iio_shared_by shared_by,
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struct device *dev,
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struct iio_buffer *buffer,
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struct list_head *attr_list);
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void iio_free_chan_devattr_list(struct list_head *attr_list);
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int iio_device_register_sysfs_group(struct iio_dev *indio_dev,
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const struct attribute_group *group);
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ssize_t iio_format_value(char *buf, unsigned int type, int size, int *vals);
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/* Event interface flags */
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#define IIO_BUSY_BIT_POS 1
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#ifdef CONFIG_IIO_BUFFER
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struct poll_table_struct;
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__poll_t iio_buffer_poll_wrapper(struct file *filp,
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struct poll_table_struct *wait);
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ssize_t iio_buffer_read_wrapper(struct file *filp, char __user *buf,
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size_t n, loff_t *f_ps);
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ssize_t iio_buffer_write_wrapper(struct file *filp, const char __user *buf,
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size_t n, loff_t *f_ps);
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int iio_buffers_alloc_sysfs_and_mask(struct iio_dev *indio_dev);
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void iio_buffers_free_sysfs_and_mask(struct iio_dev *indio_dev);
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#define iio_buffer_poll_addr (&iio_buffer_poll_wrapper)
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#define iio_buffer_read_outer_addr (&iio_buffer_read_wrapper)
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#define iio_buffer_write_outer_addr (&iio_buffer_write_wrapper)
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void iio_disable_all_buffers(struct iio_dev *indio_dev);
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void iio_buffer_wakeup_poll(struct iio_dev *indio_dev);
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void iio_device_detach_buffers(struct iio_dev *indio_dev);
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#else
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#define iio_buffer_poll_addr NULL
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#define iio_buffer_read_outer_addr NULL
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#define iio_buffer_write_outer_addr NULL
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static inline int iio_buffers_alloc_sysfs_and_mask(struct iio_dev *indio_dev)
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{
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return 0;
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}
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static inline void iio_buffers_free_sysfs_and_mask(struct iio_dev *indio_dev) {}
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static inline void iio_disable_all_buffers(struct iio_dev *indio_dev) {}
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static inline void iio_buffer_wakeup_poll(struct iio_dev *indio_dev) {}
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static inline void iio_device_detach_buffers(struct iio_dev *indio_dev) {}
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#endif
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int iio_device_register_eventset(struct iio_dev *indio_dev);
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void iio_device_unregister_eventset(struct iio_dev *indio_dev);
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void iio_device_wakeup_eventset(struct iio_dev *indio_dev);
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struct iio_event_interface;
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bool iio_event_enabled(const struct iio_event_interface *ev_int);
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#endif
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