centos man page for sata_link_scr_lpm

SATA_LINK_SCR_LPM(9)						  libata Library					      SATA_LINK_SCR_LPM(9)

NAME
       sata_link_scr_lpm - manipulate SControl IPM and SPM fields

SYNOPSIS
       int sata_link_scr_lpm(struct ata_link * link, enum ata_lpm_policy policy, bool spm_wakeup);

ARGUMENTS
       link
	   ATA link to manipulate SControl for

       policy
	   LPM policy to configure

       spm_wakeup
	   initiate LPM transition to active state

DESCRIPTION
       Manipulate the IPM field of the SControl register of link according to policy. If policy is ATA_LPM_MAX_POWER and spm_wakeup is true, the
       SPM field is manipulated to wake up the link. This function also clears PHYRDY_CHG before returning.

LOCKING
       EH context.

RETURNS
       0 on succes, -errno otherwise.

AUTHOR
       Jeff Garzik
	   Author.

COPYRIGHT
Kernel Hackers Manual 3.10					     June 2014						      SATA_LINK_SCR_LPM(9)