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| author |   Danesh Petigara <dpetigara@broadcom.com> | 2016-01-07 16:03:33 -0800 |
|---|---|---|
| committer |   Tejun Heo <tj@kernel.org> | 2016-01-08 11:50:14 -0500 |
| commit | e39b2bb3b72b999a04e8d295882be3255aca5ade (patch) | |
| tree | 03734de006c786e574b97ab5ed6178078ae884c0 /include/linux/libata.h | |
| parent | ata: ahci_brcmstb: disable DIPM support (diff) | |
| download | linux-dev-e39b2bb3b72b999a04e8d295882be3255aca5ade.tar.xz linux-dev-e39b2bb3b72b999a04e8d295882be3255aca5ade.zip | |
libata: skip debounce delay on link resume
The link resume logic uses a 200msec delay while debouncing
the SControl register. The rationale behind that delay is
to accommodate some PHYs that behave badly if their SStatus/
SControl registers are pounded immediately on resume.
The Broadcom STB SATA PHY does not seem to have this issue.
This patch introduces a new link flag that allows platforms
to skip the debounce delay if it isn't needed.
Signed-off-by: Danesh Petigara <dpetigara@broadcom.com>
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Diffstat (limited to 'include/linux/libata.h')
| -rw-r--r-- | include/linux/libata.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/libata.h b/include/linux/libata.h index 83577f8fd15b..088ed924fa66 100644 --- a/include/linux/libata.h +++ b/include/linux/libata.h @@ -205,6 +205,7 @@ enum { ATA_LFLAG_NO_LPM = (1 << 8), /* disable LPM on this link */ ATA_LFLAG_RST_ONCE = (1 << 9), /* limit recovery to one reset */ ATA_LFLAG_CHANGED = (1 << 10), /* LPM state changed on this link */ + ATA_LFLAG_NO_DB_DELAY = (1 << 11), /* no debounce delay on link resume */ /* struct ata_port flags */ ATA_FLAG_SLAVE_POSS = (1 << 0), /* host supports slave dev */ |