linux-kernel - Re: [PATCH 2/2] ARM: dts: omap3: keep ssi ports by default

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Message-ID: <20151014113736.GC14340@earth>
Date:	Wed, 14 Oct 2015 13:37:36 +0200
From:	Sebastian Reichel <sre@...nel.org>
To:	Roger Quadros <rogerq@...com>
Cc:	tony@...mide.com, pavel@....cz, pali.rohar@...il.com,
	linux-omap@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/2] ARM: dts: omap3: keep ssi ports by default

Hi,

On Wed, Oct 14, 2015 at 02:27:27PM +0300, Roger Quadros wrote:
> On 14/10/15 14:19, Sebastian Reichel wrote:
> > On Wed, Oct 14, 2015 at 01:44:16PM +0300, Roger Quadros wrote:
> >> Let's keep the SSI ports disabled in the omap3.dtsi to avoid
> >> getting the following noise on the console for boards that don't
> >> use the SSI ports.
> >>
> >> "omap_ssi_port 4805a000.ssi-port: DT data is missing cawake gpio (err=-2)"
> >>
> >> As omap3-n900 uses one SSI port, mark it enabled there.
>
> Would it be preferable to disable the ssi-controller node as well in the
> omap3.dtsi file?

If I remember it correctly, existing, but unused IP-Cores
should not be disabled in DT, so that hwmod picks them up
for power management.

Note, that it actually is disabled in omap3.dtsi and then enabled in
omap34xx/omap36xx dts files (the other variants do not have an ssi
module).

-- Sebastian

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