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.
RETURNS
0 on success, -errno otherwise.