pciconf -w

[M. Warner Losh]

In message: <1208358909.10448.1.camel at RabbitsDen>
            "Alexandre \"Sunny\" Kovalenko" <gaijin.k at gmail.com> writes:
: On Wed, 2008-04-16 at 10:37 -0400, John Baldwin wrote:
: > On Wednesday 16 April 2008 07:40:18 am Takashi Inoue wrote:
: > > Hi friends,
: > >
: > > Does anyone know how to trun off a pci device using pciconf -w ?
: > >
: > > Becase my MiniPCI Express wireless card is realy hot,
: > > I want to turn off when I don't need it.
: > >
: > >
: > > ath0 at pci0:3:0:0:       class=0x020000 card=0x058a1014 chip=0x1014168c
: > > rev=0x01 hdr=0x00
: > >     vendor     = 'Atheros Communications Inc.'
: > >     device     = 'AR5212 Atheros AR5212 802.11abg wireless'
: > >     class      = network
: > >     subclass   = ethernet
: > >     cap 01[40] = powerspec 2  supports D0 D3  current D0
: > >     cap 05[50] = MSI supports 1 message
: > >     cap 10[60] = PCI-Express 1 legacy endpoint
: > >     cap 11[90] = MSI-X supports 1 message in map 0x10
: > 
: > Bug warner (imp at FreeBSD.org) for his devctl patch and use that to turn it off.
: > 
: Just out of curiosity... would setting hw.pci.do_power_nodriver="3" and
: unloading if_ath.ko do the trick?

Yes.

Warner