suse man page for sata_scr_read

SATA_SCR_READ(9)						  libata Library						  SATA_SCR_READ(9)

NAME
       sata_scr_read - read SCR register of the specified port

SYNOPSIS
       int sata_scr_read(struct ata_link * link, int reg, u32 * val);

ARGUMENTS
       link
	   ATA link to read SCR for

       reg
	   SCR to read

       val
	   Place to store read value

DESCRIPTION
       Read SCR register reg of link into *val. This function is guaranteed to succeed if link is ap->link, the cable type of the port is SATA and
       the port implements ->scr_read.

LOCKING
       None if link is ap->link. Kernel thread context otherwise.

RETURNS
       0 on success, negative errno on failure.

AUTHOR
       Jeff Garzik
	   Author.

COPYRIGHT
Kernel Hackers Manual 2.6.					     July 2010							  SATA_SCR_READ(9)