Re: About current state of supporting USB selective suspend feature
Alan Stern <[email protected]>
| Newsgroups | gmane.linux.usb.devel |
|---|---|
| Message-ID | <[email protected]> |
On Fri, 27 Jul 2007, gutian abei wrote: > Dear All: > I am trying to develop a USB device driver in Linux platform. > I want to know the current state of supporting USB selective suspend > feature of Linux USB core. This feature is described by USB specification > 2.0. The USB core supports selective suspend (also known as "runtime suspend" or "autosuspend"). However individual USB device drivers must also include support, which means the driver must implement at least a suspend() and a resume() method, and it must set the .supports_autosuspend flag in its usb_driver structure. It also must call usb_autopm_get_interface() and usb_autopm_put_interface() at the appropriate times. There's a lot of documention in the comments in drivers/usb/core/driver.c. Alan Stern ------------------------------------------------------------------------- This SF.net email is sponsored by: Splunk Inc. Still grepping through log files to find problems? Stop. Now Search log events and configuration files using AJAX and a browser. Download your FREE copy of Splunk now >> http://get.splunk.com/ _______________________________________________ [email protected] To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-devel