Message-ID: <1505753484.9807.18.camel@pengutronix.de>
Subject: Re: [PATCH v2] ARC: reset: introduce AXS10x reset driver
From: Philipp Zabel <p.zabel@pengutronix.de>
To: Vineet Gupta <Vineet.Gupta1@synopsys.com>,
        Eugeniy Paltsev <Eugeniy.Paltsev@synopsys.com>
Cc: linux-snps-arc@lists.infradead.org, linux-kernel@vger.kernel.org,
        devicetree@vger.kernel.org, Rob Herring <robh+dt@kernel.org>,
        Mark Rutland <mark.rutland@arm.com>
Date: Mon, 18 Sep 2017 18:51:24 +0200
In-Reply-To: <ce7885ab-b87e-ca07-234f-b63811afd86c@synopsys.com>
References: <20170914142842.12225-1-Eugeniy.Paltsev@synopsys.com>
         <1505736441.9807.8.camel@pengutronix.de>
         <ce7885ab-b87e-ca07-234f-b63811afd86c@synopsys.com>
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Hi Vineet,

On Mon, 2017-09-18 at 09:14 -0700, Vineet Gupta wrote:
> Hi Philipp,
> 
> On 09/18/2017 05:07 AM, Philipp Zabel wrote:
> > On Thu, 2017-09-14 at 17:28 +0300, Eugeniy Paltsev wrote:
> > > ARC AXS10x boards support custom IP-block which allows to control
> > > reset signals of selected peripherals. For example DW GMAC, etc...
> > > This block is controlled via memory-mapped register (AKA CREG) which
> > > represents up-to 32 reset lines. This regiter is self-clearing so we
> > > don't need to deassert line after reset.
> > > 
> > > As of today only the following lines are used:
> > >   - DW GMAC - line 5
> > > 
> > > > Signed-off-by: Eugeniy Paltsev <Eugeniy.Paltsev@synopsys.com>
> > > 
> > > ---
> > > Changes v1 -> v2:
> > >    * The creg reset register is self-clearing so we don't need to clear it
> > >      manually. Fixed it.
> > >    * Use reset callback instead of assert/deassert pair.
> > >    * Rename reset node in documentation to "reset-controller" for consistency
> > >      with the other bindings.
> > >    * Use devm_reset_controller_register instead of reset_controller_register
> > > 
> > > NOTE:
> > >      This driver couldn't be replaced by reset-simple driver as we mustn't
> > >      read from reset register or clear it.
> > 
> > Thanks, I've applied this patch to the reset/next branch.
> 
> Will it be OK for you to apply the corresponding DT update for platform - that way 
> I don't have to keep track of when ur branch hits mainline etc.
> 
> The chances of any ensuing conflicts are pretty rare - and easy to resolve if at all.
>
> If so, Eugeniy can send the patch ur way !

Maybe it is better to do this the other way around? I can put this patch
on a stable reset/arc branch for you to merge before applying the reset
DT updates.

regards
Philipp