Man page 9 : sata_link_scr_lpm

sata_link_scr_lpm - manipulate SControl IPM and SPM fields

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

link
    ATA link to manipulate SControl for

policy
    LPM policy to configure

spm_wakeup
    initiate LPM transition to active state

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.

EH context.

0 on succes, -errno otherwise.

Jeff Garzik
    Author.