linux-kernel - Re: [STLinux Kernel] [PATCH 0/7] reset: Consumers to explicitly request 'exclusive' or 'shared' lines

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Date:	Tue, 7 Jun 2016 10:15:43 +0100
From:	Lee Jones <lee.jones@...aro.org>
To:	Peter Griffin <peter.griffin@...aro.org>
Cc:	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	balbi@...nel.org, kernel@...inux.com,
	srinivas.kandagatla@...il.com, linux-usb@...r.kernel.org,
	kishon@...com, p.zabel@...gutronix.de, gregkh@...uxfoundation.org
Subject: Re: [STLinux Kernel] [PATCH 0/7] reset: Consumers to explicitly
 request 'exclusive' or 'shared' lines

On Tue, 07 Jun 2016, Peter Griffin wrote:

> Hi,
> 
> On Mon, 06 Jun 2016, Lee Jones wrote:
> 
> > Phasing out generic reset line requests enables us to make some better
> > decisions on when and how to (de)assert said lines.  If an 'exclusive'
> > line is requested, we know a device *requires* a reset and that it's
> > preferable to act upon a request right away.  However, if a 'shared'
> > reset line is requested, we can reasonably assume sure that placing a
> > device into reset isn't a hard requirement, but probably a measure to
> > save power and is thus able to cope with not being asserted if another
> > device is still in use.
> > 
> > In order allow gentle adoption and not to forcing all consumers to
> > move to the API immediately, causing administration headache between
> > subsystems, this patch adds some temporary stand-in shim-calls.  This
> > will ease the burden at merge time and allow subsystems to migrate over
> > to the new API in a more realistic time-frame.
> 
> Is the intention that this series will be taken into the next -rc?
> 
> As the introduction of shared resets in reset subsystem has caused regressions
> on STi platforms.

Yes, which is why it has a Fixes: tag.

-- 
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
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