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MFC r203426:

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Disable PHY of unconnected ports when interface power management enabled.
It allows to save a bit more power (about 0.5W on 2 unused ports of ICH8M).
This commit is contained in:
mav 2010-02-14 20:00:21 +00:00
parent ebb6ae4568
commit 0be808d5d6
1 changed files with 6 additions and 1 deletions
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7
sys/dev/ahci/ahci.c
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@ -2291,7 +2291,12 @@ ahci_sata_phy_reset(device_t dev)
ATA_SC_DET_IDLE | val | ((ch->pm_level > 0) ? 0 :
(ATA_SC_IPM_DIS_PARTIAL | ATA_SC_IPM_DIS_SLUMBER)));
DELAY(5000);
return (ahci_sata_connect(ch));
if (!ahci_sata_connect(ch)) {
if (ch->pm_level > 0)
ATA_OUTL(ch->r_mem, AHCI_P_SCTL, ATA_SC_DET_DISABLE);
return (0);
}
return (1);
}
static void