linux-kernel - Re: [PATCH 2/3] ARM: OMAP: hwmod: revise deassert sequence

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Date:	Mon, 20 Aug 2012 12:21:56 +0200
From:	Benoit Cousson <b-cousson@...com>
To:	Omar Ramirez Luna <omar.luna@...aro.org>
CC:	Vaibhav Hiremath <hvaibhav@...com>, Paul Walmsley <paul@...an.com>,
	Tony Lindgren <tony@...mide.com>,
	Russell King <linux@....linux.org.uk>,
	Kevin Hilman <khilman@...com>,
	Ohad Ben-Cohen <ohad@...ery.com>,
	Tomi Valkeinen <tomi.valkeinen@...com>,
	<linux-omap@...r.kernel.org>,
	<linux-arm-kernel@...ts.infradead.org>,
	<linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 2/3] ARM: OMAP: hwmod: revise deassert sequence

Hi Omar,

On 08/03/2012 05:52 PM, Omar Ramirez Luna wrote:
> On 3 August 2012 00:24, Vaibhav Hiremath <hvaibhav@...com> wrote:
>> On 8/3/2012 3:50 AM, Omar Ramirez Luna wrote:
>>> So in _enable:
>>>
>>>         _enable_clocks(oh);
>>>         if (soc_ops.enable_module)
>>>                 soc_ops.enable_module(oh);
>>>
>>> The enable_module part seems redundant to me, since the module should
>>> be already enabled by the first call to _enable_clocks.
>>
>> Yes they do same thing, I believe the plan is to get rid of all clock
>> leaf-nodes in the near future, and let hwmod handle module
>> enable/disable part.
> 
> If this is the case then an enable_module call is needed in my patch
> for when these changes are made. The original works fine but only
> because currently clock framework does what enable_module is doing.

Yes, that's the case, but I plan to remove most of the leaf clocks ASAP,
so we cannot rely on that.

> Please let me know if you want me to resend with this change.

Yes, could you please repost with that change?

It will be good as well that you remove the leaf clock and use the
parent clock of current leaf as the main_clock. In that case it will
ensure that this is the hwmod fmwk that does enable the modulemode and
not the clock fmwk.

Regards,
Benoit

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