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libata: Add the AHCI_HFLAG_YES_ALPM flag

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Some hardware is capable of supporting Aggresive Link Power Management
even though it is not indicated by the Host Capability register.

This commit adds the AHCI_HFLAG_YES_ALPM flag to the AHCI library to
allow indication of this quirk when the Host Capability register is
Read Only and therefore cannot be changed.

Signed-off-by: Doug Berger <opendmb@gmail.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
This commit is contained in:
Doug Berger
2017-06-21 16:20:12 -07:00
committed by Tejun Heo
parent d0318fb3c3
commit ef0da1bf76
2 changed files with 6 additions and 0 deletions
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drivers/ata/ahci.h
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@@ -248,6 +248,7 @@ enum {
AHCI_HFLAG_MULTI_MSI = 0,
#endif
AHCI_HFLAG_WAKE_BEFORE_STOP = (1 << 22), /* wake before DMA stop */
AHCI_HFLAG_YES_ALPM = (1 << 23), /* force ALPM cap on */
/* ap->flags bits */