From: Scott Wood <scottwood@freescale.com>
To: Frans Meulenbroeks <fransmeulenbroeks@gmail.com>
Cc: linuxppc-dev@lists.ozlabs.org
Subject: Re: fsl spi questions & patch
Date: Fri, 30 Nov 2012 10:45:31 -0600 [thread overview]
Message-ID: <1354293931.16659.13@tyr> (raw)
In-Reply-To: <CACW_hTa4eVOfxKus1ma8vB6dVZu4PovasLtn=+7UygqYtC_Vww@mail.gmail.com> (from fransmeulenbroeks@gmail.com on Wed Nov 28 03:39:22 2012)
On 11/28/2012 03:39:22 AM, Frans Meulenbroeks wrote:
> Hi,
>=20
> I've been playing with spi on mpc8313e and have some things on
> spi-fsl-spi.c:
>=20
> Is QE useful on 8313?
> I've tried it (using cpu-qe in my dts file) and see in the boot log =20
> that it
> is used, but I do not really see any effect when it comes to =20
> performance or
> cpu usage.
8313 does not have a QE. The "effect" when you do have a QE and use it =20
is that you can talk to the peripherals that are connected to the QE. =20
The effect when you modify the device tree to say the board has =20
hardware that it doesn't have is generally bad.
-Scott=
prev parent reply other threads:[~2012-11-30 16:46 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-11-28 9:39 fsl spi questions & patch Frans Meulenbroeks
2012-11-30 16:45 ` Scott Wood [this message]
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