On 10/16/06, Alan Stern <[EMAIL PROTECTED]> wrote: > On Mon, 16 Oct 2006, Dmitry Torokhov wrote: > > > I don't agree. I think that power management should be left to drivers > > working with hardware and not be placed into input core. There will be > > different rules and different decisions, based on the type of device > > (USB, PS/2, serial, etc, etc). Input layer should not be concerned > > with these. > > It works the other way, too. There are all sorts of input devices > (keyboard, mouse, joystick, ...) each needing different rules about when > it has been inactive long enough to suspend. The input layer understands > them, whereas the USB, PS/2, serial, etc. layers shouldn't have to. >
Actually input layer does not know whether a device is a joystick or keyboard or mouse. It just knows that a device has certain capabilities but leaves classification either to interfaces (joydev, mousedev) or to userspace. > One approach would be to add a function callback pointer to the input > device structure for autosuspend requests. The transport layer would then > be responsible for handling these callbacks and carrying out the suspend. But input does not care about power management. It's like saying that we need to move power management for disks into partition handling or filesystem code or (taking to extreme) userspace. Input will tells device whether it is used or not (open/closed) and expects device to be available if it is open. It is lower level driver's task to implement autosuspend if needed but it has to be transparent for the upper layer. -- Dmitry ------------------------------------------------------------------------- Using Tomcat but need to do more? Need to support web services, security? Get stuff done quickly with pre-integrated technology to make your job easier Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642 _______________________________________________ linux-usb-devel@lists.sourceforge.net To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-devel
