linux-kernel - Re: HOWTO Undo/Revert of_platform

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Date:	Thu, 07 Mar 2013 18:07:53 -0600
From:	Rob Herring <robherring2@...il.com>
To:	Ricardo Ribalda Delgado <ricardo.ribalda@...il.com>
CC:	LKML <linux-kernel@...r.kernel.org>,
	Grant Likely <grant.likely@...retlab.ca>,
	devicetree-discuss@...ts.ozlabs.org
Subject: Re: HOWTO Undo/Revert of_platform_populate?

On 03/07/2013 04:32 AM, Ricardo Ribalda Delgado wrote:
> Hi
> 
> I have an FPGA attached to the pci bus. The FPGA has an internal bus
> with multiple cores that are already supported in the kernel.
> 
> I have made a driver that populates those cores using a user provided
> device tree. I use the function of_platform_populate for that.
> 
> All this is working fine, but now I need a method to undo what
> of_platform_populate does when the fpga is reprogrammed.
> 
> I haven't found any function that does this in the api.
> 
> Before implementing my own I would like to know if am I missing something?

It's not possible in the current kernel. You need DT overlay support
that was posted recently.

Rob

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