1SATA_LINK_SCR_LPM(9)            libata Library            SATA_LINK_SCR_LPM(9)
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NAME

6       sata_link_scr_lpm - manipulate SControl IPM and SPM fields
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SYNOPSIS

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

13       link
14           ATA link to manipulate SControl for
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16       policy
17           LPM policy to configure
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19       spm_wakeup
20           initiate LPM transition to active state
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DESCRIPTION

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

29       EH context.
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RETURNS

32       0 on success, -errno otherwise.
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AUTHOR

35       Jeff Garzik
36           Author.
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39Kernel Hackers Manual 3.10         June 2019              SATA_LINK_SCR_LPM(9)
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