Re: PXA27x UDC Power
Oliver Neukum <[email protected]>
| Newsgroups | gmane.linux.usb.devel |
|---|---|
| Message-ID | <[email protected]> |
Am Mittwoch 28 November 2007 schrieb Justin Clacherty: > Hi, > > We've got a PXA27x system using the pxa27xudc driver to talk to a > desktop via CDC. The device also recharges its battery using USB power > and requires more than 100mA to do this. > > The CDC driver reports that it is using/requires 100mA. Looking through > the code I haven't been able to find out how I tell the host I want more > power. I also can't find anywhere that tells me that the host can > supply 500mA (ie. I'm not on an unpowered hub). The power needs are listed in a descriptor per configuration. > How do I tell the host I want more? I could hack the configuration in > ether.c but I figured this really wasn't a nice way to do it and that > there was most likely a better way. > > How do I tell if the host can supply more than 100mA? You cannot. The canonical way to support this is to provide two configurations, identical except for power use. Regards Oliver ------------------------------------------------------------------------- SF.Net email is sponsored by: The Future of Linux Business White Paper from Novell. From the desktop to the data center, Linux is going mainstream. Let it simplify your IT future. http://altfarm.mediaplex.com/ad/ck/8857-50307-18918-4 _______________________________________________ [email protected] To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-devel