pci_write_legacy_io
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## Name

pci_write_legacy_io — write byte(s) to legacy I/O port space

## Synopsis

`ssize_t pci_write_legacy_io (` | struct file * filp,
| struct kobject * kobj,
| struct bin_attribute * bin_attr,
| char * buf,
| loff_t off,
| size_t count`)`;

## Arguments

`filp`

  open sysfs file

`kobj`

  kobject corresponding to file to read from

`bin_attr`

  struct bin_attribute for this file

`buf`

  buffer containing value to be written

`off`

  offset into legacy I/O port space

`count`

  number of bytes to write

## Description

Writes 1, 2, or 4 bytes from legacy I/O port space using an arch specific callback routine (pci_legacy_write).

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