Date: Tue, 13 Jan 2015 07:57:31 -0800 From: Adrian Chadd <adrian@freebsd.org> To: Lars Engels <lars.engels@0x20.net> Cc: Matthias Apitz <guru@unixarea.de>, "freebsd-mobile@freebsd.org" <freebsd-mobile@freebsd.org> Subject: Re: power off ath0: <Atheros AR946x/AR948x> Message-ID: <CAJ-Vmo=b9zRpQNaUmqJNXzmEv5EO8XkXJVUjrp3Uy625pPiZ1A@mail.gmail.com> In-Reply-To: <20150113091337.GL67556@e-new.0x20.net> References: <20150111080530.GA2035@c720-r276659> <54B3FC5F.3070306@FreeBSD.org> <87A73FD4-485B-4F38-B9D2-3F804BED4905@bsdimp.com> <CAJ-Vmo=8xr7hQ9z1Fy_kmMv3nSxhc-zPFBQfw8WqaqB132XsfA@mail.gmail.com> <20150113091337.GL67556@e-new.0x20.net>
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All atheros PCI/PCIe devices. -a On 13 January 2015 at 01:13, Lars Engels <lars.engels@0x20.net> wrote: > On Mon, Jan 12, 2015 at 11:20:07AM -0800, Adrian Chadd wrote: >> On 12 January 2015 at 08:56, Warner Losh <imp@bsdimp.com> wrote: >> > >> >> On Jan 12, 2015, at 9:54 AM, John Baldwin <jhb@FreeBSD.org> wrote: >> >> >> >> On 1/11/15 3:05 AM, Matthias Apitz wrote: >> >>> >> >>> Hello, >> >>> >> >>> Is there a way to completely power-off the Wifi chip in my Acer C720= ? >> >>> I tried 'ifconfig ath0 down' which saves around 20 mA. But the LED s= tays >> >>> on, which let me think it is still someow on-air. >> >> >> >> Not yet. You could try setting the tunable to disable power for PCI >> >> devices without a driver and not include 'ath' in your kernel config.= I >> >> will (soon) commit a new 'devctl' tool to HEAD that would let you do >> >> 'devctl suspend ath0' to do this. >> > >> > I=E2=80=99d love to see this tied into the forthcoming work on PCIe ho= t plug as well, >> > which is one way to power off the slot. But that work seems to be stal= led=E2=80=A6 >> >> Right. So, the driver in -HEAD should be powering off almost all of >> the chip when no vap (ie, wlanX) is active. The only parts of the chip >> that stay on is the PCIe PHY and the GPIO/RTC block. AFAIK we don't >> support PCIe power save state management at the moment, so we can't >> keep the PCIe PHY off. >> >> But yeah, most of the chip is off. The chip doesn't take all that much >> power unless it's actively transmitting/receiving. The LEDs are on >> because the GPIO block is on and it's likely holding the LED up. > > Is that only true for this chip, all ath ones or even all wireless > devices?
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