pci_read_legacy_io (9) Linux Manual Page

pci_read_legacy_io – read byte(s) from legacy I/O port space

Synopsis

ssize_t pci_read_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 to store results

off

offset into legacy I/O port space

count

number of bytes to read

Description

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

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