linux-kernel - Re: [PATCH 2/2] ARM: imx: src: support vf610 system reset controller

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Message-ID: <7cd7c820d32cb04fa1d59889d16666a9@agner.ch>
Date:	Fri, 28 Nov 2014 22:02:01 +0100
From:	Stefan Agner <stefan@...er.ch>
To:	Arnd Bergmann <arnd@...db.de>
Cc:	linux-arm-kernel@...ts.infradead.org, shawn.guo@...aro.org,
	kernel@...gutronix.de, linux@...ck-us.net,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/2] ARM: imx: src: support vf610 system reset controller

On 2014-11-28 17:49, Arnd Bergmann wrote:
> On Friday 28 November 2014 17:43:35 Stefan Agner wrote:
>> Support Vybrid SoC's system reset controller (SRC). Currently we
>> don't register a reset controller but only support the imx_cpu_jump
>> and imx_cpu_arg functions.
>>
>> Signed-off-by: Stefan Agner <stefan@...er.ch>
> 
> I think this should be a platform driver in drivers/power/reset.

Yeah, I thought that too, see my cover letter. The problem is, in that
module are also some register which are of interest when implementing
suspend/resume support (see cover letter too). However, we could also
just make a dt entry for that reset register only, and create another dt
entry for the other registers.

> If the SRC is also capable of resetting individual blocks instead of just
> the entire machine, it would be a reset driver in drivers/reset instead.

Beside the system reset, there is only a mask functionality for the
watchdogs (there are two watchdogs, one for Cortex-A5 and one for the
M4). This makes the SRC module in the Vybrid a bit different then what
is available on other i.MX SoC's...

--
Stefan

> 
> 	Arnd

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