linux-kernel - Re: [PATCH 1/6] ata: ahci: add AHCI support for Berlin SoCs

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Message-ID: <20140423082409.GC24355@kwain>
Date:	Wed, 23 Apr 2014 10:24:09 +0200
From:	Antoine Ténart 
	<antoine.tenart@...e-electrons.com>
To:	Rob Herring <robherring2@...il.com>
Cc:	Sebastian Hesselbarth <sebastian.hesselbarth@...il.com>,
	Tejun Heo <tj@...nel.org>, zmxu@...vell.com,
	Jisheng Zhang <jszhang@...vell.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	linux-ide@...r.kernel.org,
	Alexandre Belloni <alexandre.belloni@...e-electrons.com>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH 1/6] ata: ahci: add AHCI support for Berlin SoCs

Rob,

On Tue, Apr 22, 2014 at 01:54:33PM -0500, Rob Herring wrote:
> On Tue, Apr 22, 2014 at 1:47 PM, Rob Herring <robherring2@...il.com> wrote:
> > On Tue, Apr 22, 2014 at 10:38 AM, Antoine Ténart
> > <antoine.tenart@...e-electrons.com> wrote:
> >> Add support for the Berlin SoCs AHCI SATA controller allowing to
> >> interface with devices like external hard drives.
> 
> One more thing.
> 
> >> +       nports = readl(hpriv->mmio + HOST_PORTS_IMPL);
> >> +
> >> +       /* force_map is modified only if the property is found */
> >> +       of_property_read_u32(np, "marvell,force-port-map", &force_map);
> 
> This property does not appear to be documented.

I'll update it regarding Sebastian comments, or maybe drop it if it is
possible to enable each port individually.

> 
> >> +       if (force_map)
> >> +               nports = force_map;
> 
> You don't need this as your comment says, you can just do:
> 
> of_property_read_u32(np, "marvell,force-port-map", &nports);
> 
> nports will only be changed if property is present.

Sure.

Thanks!

Antoine

-- 
Antoine Ténart, Free Electrons
Embedded Linux, Kernel and Android engineering
http://free-electrons.com
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