Subject: Re: PNP power management API for drivers
To: Jason Thorpe <>
From: Jared D. McNeill <>
List: tech-kern
Date: 10/16/2007 15:23:18
On Tue, 16 Oct 2007, Jason Thorpe wrote:
> ...and how does it power it on?  On some devices (SoCs, especially), the 
> power may be controlled by something completely unrelated to the device 
> (within the scope of the device driver, at least).
> To power on a device, you need to make a request to the power domain that 
> device resides in.  In some cases, it might be PCI-style "go to D0".  In some 
> cases, it might be "call to board-specific ASIC that powers on 5 devices that 
> are located in the same area of the board".

Gotcha. Thanks for clarifying.