Date: Wed, 3 Feb 2010 12:00:57 +0000 (UTC) From: Alexander Motin <mav@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r203426 - head/sys/dev/ahci Message-ID: <201002031200.o13C0vPG087449@svn.freebsd.org>
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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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