Messages in this thread | | | From | Michael Buesch <> | Subject | Re: [PATCH] b44: power down PHY when interface down | Date | Sat, 30 Jun 2007 23:53:25 +0200 |
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On Saturday 30 June 2007 13:47:35 Török Edvin wrote: > When the interface is down (or driver removed), the BroadCom 44xx card remains > powered on, and both its MAC and PHY is using up power. > This patch makes the driver issue a MAC_CTRL_PHY_PDOWN when the interface > is halted, and does a partial chip reset turns off the activity LEDs too. > > Applies to 2.6.22-rc6, or current git head. > > Tested on a Broadcom BCM4401-B0 card, it saves ~0.5W (measured using powertop).
Hm, I was going to measure the real power advantage with a PCI-extender card. But my B44B0 card doesn't seem to work in that extender card. It works perfectly fine sticked directly into the motherboard, though, and other cards like a BCM4318 work in the extender, too. Not sure what this is. The extender has an application note about nonworking cards in the extender and a too big resistor on the board IDSEL pin being the cause of this. Maybe I can try with another machine tomorrow.
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