Author: mav
Date: Wed Feb 3 12:00:57 2010
New Revision: 203426
URL: http://svn.freebsd.org/changeset/base/203426
Log:
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).
Modified:
head/sys/dev/ahci/ahci.c
Modified: head/sys/dev/ahci/ahci.c
==============================================================================
--- head/sys/dev/ahci/ahci.c Wed Feb 3 11:22:03 2010 (r203425)
+++ head/sys/dev/ahci/ahci.c Wed Feb 3 12:00:57 2010 (r203426)
@@ -2297,7 +2297,12 @@ 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
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