linux-kernel - RE: [RFC 5/8] remoteproc: add davinci implementation

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Message-ID: <B85A65D85D7EB246BE421B3FB0FBB593024D91A2BE@dbde02.ent.ti.com>
Date:	Tue, 5 Jul 2011 10:59:46 +0530
From:	"Nori, Sekhar" <nsekhar@...com>
To:	"Grosen, Mark" <mgrosen@...com>,
	Sergei Shtylyov <sshtylyov@...sta.com>
CC:	Ohad Ben-Cohen <ohad@...ery.com>,
	davinci-linux-open-source 
	<davinci-linux-open-source@...ux.davincidsp.com>,
	Arnd Bergmann <arnd@...db.de>,
	Brian Swetland <swetland@...gle.com>,
	Rusty Russell <rusty@...tcorp.com.au>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Grant Likely <grant.likely@...retlab.ca>,
	"akpm@...ux-foundation.org" <akpm@...ux-foundation.org>,
	"linux-omap@...r.kernel.org" <linux-omap@...r.kernel.org>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>
Subject: RE: [RFC 5/8] remoteproc: add davinci implementation

Hi Mark,

On Tue, Jun 28, 2011 at 00:01:41, Grosen, Mark wrote:
> > From: Nori, Sekhar
> > Sent: Friday, June 24, 2011 8:44 AM

> > To assert/de-assert local reset when enabling or disabling PSC,
> > you could use a flag in the clock structure to indicate the need
> > for this. This way, if there is any other module needing a local
> > reset, it can just define the same flag. Similarly, if the DSP
> > does not need a local reset on a particular platform, that
> > platform can simply skip the flag.
> > 
> > This can be done in a manner similar to how the support for
> > a forced transition PSC was added here:
> > 
> > https://patchwork.kernel.org/patch/662941/
> 
> Yes, I like this idea - much cleaner. For example, the start() method
> becomes (pseudo-code):
> 
> start()
> {
>     /* bootaddrreg derived from platform data */
>     bootaddrreg = boot_address;
> 
>     clk_enable();
> }
> 
> Referring to your patch above, would it be better to just pass
> the flags into the davinci_psc_config() function rather than breaking out more
> arguments for each flag?

I did dwell on this quite a bit while writing that
patch, but finally decided on passing an argument
instead since I was not sure if there are going
to be more modifiers required.

Now that you have the need for one more flag, I
think we should go ahead and pass the flags directly
to davinci_psc_config(). My original patch is not
upstream yet. I will re-spin it and you can build
on top of it.

Thanks,
Sekhar

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