Zynq Linux watchdog and power management features

michaelbrookswfs · ‎06-21-2012

We hope to use the Xilinx Linux distribution (the standard 8M RAMDisk one) for the Zynq-7000 EPP for a project. I can find no information about what (if any) use this build makes of the watchdog and power management features of the Zynq. We would certainly like to make use of power management (arguably watchdog is less important with a well tried OS such as Linux but that notwithstanding I would still be nervous without it), but if I can't find out whether and what is currently being done with these features then are we facing the prospect of having to try and modify the Linux source and make our own build? Speaking frankly, the prospect of that scares the willies out of me.

linnj · ‎09-10-2008

The power management is not in there yet. We're working on it in a 3.5 branch as we need the latest kernel. It will be a while, roughly towards end of summer for some better stuff to be completed. I don't know what your timeframe is.

The watchdog is in there, but there are 3 of them, a system, and 2 in the A9s. The Linux interface for the watchdog was not really setup for multiple watchdogs til about 3.5 so we're updating hte drivers to use the new wdt core and allow multiple wdts at the same time. This is doing to be in our 3.5 work.

We are releasing 3.3 soon in sync with 14.2 release of IDS tools, then we'll be moving to 3.5 kernel for 14.3 release hopefully.

Hope that helps.

John Linn

michaelbrookswfs · ‎06-21-2012

John, many thanks. This is exactly the sort of information that I was looking for. Just out of interest, do you guys happen to publish this sort of information anywhere, thus saving us customers from pestering you on the forums?

Regards,

Michael

linnj · ‎09-10-2008

We've not done a good job of that yet. If we put page on the wiki, wiki.xilinx.com, would that help?

It's a bit hard to put out a concrete plan sometimes as open source tends to be a bit organically grown IMHO, but we could at least way here's where we're headed and what we trying to do. We say that in general we stay close to the bleeding edge on Linux.

Thanks.

John Linn