From: Scott Wood <scottwood-KZfg59tc24xl57MIdRCFDg@public.gmane.org>
To: Wolfram Sang <wsa-z923LK4zBo2bacvFa/9K2g@public.gmane.org>
Cc: Valentin Longchamp
<valentin.longchamp-SkAbAL50j+5BDgjK7y7TUQ@public.gmane.org>,
Linux PowerPC Kernel
<linuxppc-dev-uLR06cmDAlY/bJ5BZ2RsiQ@public.gmane.org>,
Linux device trees
<devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>,
Linux I2C <linux-i2c-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>,
"Brunck,
Holger" <Holger.Brunck-SkAbAL50j+5BDgjK7y7TUQ@public.gmane.org>,
"Boschung,
Rainer" <Rainer.Boschung-SkAbAL50j+5BDgjK7y7TUQ@public.gmane.org>
Subject: Re: [PATCH] i2c-qoriq: modified compatibility for correct prescaler
Date: Mon, 17 Nov 2014 19:28:03 -0600 [thread overview]
Message-ID: <1416274083.15957.96.camel@freescale.com> (raw)
In-Reply-To: <20141114082832.GA2180@katana>
On Fri, 2014-11-14 at 09:28 +0100, Wolfram Sang wrote:
> > >
> > > If we're going to change the device tree I'd rather just add a property
> > > to say what the prescaler is.
> >
> > We would however, leave the boards' device trees that use things like
> > "fsl,mpc8543-i2c" as is and introduce the prescaler for the others requiring it.
> >
> >
> > Now the drawback is that the driver would require a change, to parse this
> > prescaler new prescaler property. Would this be OK from your point of view
> > Wolfram ? If yes, I will send the patches for it.
>
> I don't think it is OK.
Why?
> I'd think it can be deduced from the compatible property.
For almost all existing device trees it cannot be.
If you want something that will work without changing device trees,
you'll need to use SVR to identify the SoC.
-Scott
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WARNING: multiple messages have this Message-ID (diff)
From: Scott Wood <scottwood@freescale.com>
To: Wolfram Sang <wsa@the-dreams.de>
Cc: Valentin Longchamp <valentin.longchamp@keymile.com>,
Linux device trees <devicetree@vger.kernel.org>,
"Boschung, Rainer" <Rainer.Boschung@keymile.com>,
"Brunck, Holger" <Holger.Brunck@keymile.com>,
Linux I2C <linux-i2c@vger.kernel.org>,
Linux PowerPC Kernel <linuxppc-dev@lists.ozlabs.org>
Subject: Re: [PATCH] i2c-qoriq: modified compatibility for correct prescaler
Date: Mon, 17 Nov 2014 19:28:03 -0600 [thread overview]
Message-ID: <1416274083.15957.96.camel@freescale.com> (raw)
In-Reply-To: <20141114082832.GA2180@katana>
On Fri, 2014-11-14 at 09:28 +0100, Wolfram Sang wrote:
> > >
> > > If we're going to change the device tree I'd rather just add a property
> > > to say what the prescaler is.
> >
> > We would however, leave the boards' device trees that use things like
> > "fsl,mpc8543-i2c" as is and introduce the prescaler for the others requiring it.
> >
> >
> > Now the drawback is that the driver would require a change, to parse this
> > prescaler new prescaler property. Would this be OK from your point of view
> > Wolfram ? If yes, I will send the patches for it.
>
> I don't think it is OK.
Why?
> I'd think it can be deduced from the compatible property.
For almost all existing device trees it cannot be.
If you want something that will work without changing device trees,
you'll need to use SVR to identify the SoC.
-Scott
next prev parent reply other threads:[~2014-11-18 1:28 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-10-17 9:27 [PATCH] i2c-qoriq: modified compatibility for correct prescaler Valentin Longchamp
2014-10-17 9:27 ` Valentin Longchamp
[not found] ` <1413538026-15739-1-git-send-email-valentin.longchamp-SkAbAL50j+5BDgjK7y7TUQ@public.gmane.org>
2014-10-28 23:08 ` Scott Wood
2014-10-28 23:08 ` Scott Wood
2014-10-29 8:59 ` Valentin Longchamp
2014-10-29 8:59 ` Valentin Longchamp
[not found] ` <5450AC85.40302-SkAbAL50j+5BDgjK7y7TUQ@public.gmane.org>
2014-11-06 21:58 ` Scott Wood
2014-11-06 21:58 ` Scott Wood
2014-11-13 0:34 ` Wolfram Sang
2014-11-13 0:34 ` Wolfram Sang
2014-11-14 7:43 ` Valentin Longchamp
2014-11-14 7:43 ` Valentin Longchamp
[not found] ` <5465B285.7070005-SkAbAL50j+5BDgjK7y7TUQ@public.gmane.org>
2014-11-14 8:28 ` Wolfram Sang
2014-11-14 8:28 ` Wolfram Sang
2014-11-18 1:28 ` Scott Wood [this message]
2014-11-18 1:28 ` Scott Wood
[not found] ` <1416274083.15957.96.camel-KZfg59tc24xl57MIdRCFDg@public.gmane.org>
2014-11-25 18:13 ` Wolfram Sang
2014-11-25 18:13 ` Wolfram Sang
2014-11-26 1:41 ` Scott Wood
2014-11-26 1:41 ` Scott Wood
[not found] ` <1416966097.15957.171.camel-KZfg59tc24xl57MIdRCFDg@public.gmane.org>
2014-11-30 4:30 ` Danielle Costantino
2014-11-30 4:30 ` Danielle Costantino
[not found] ` <CAAVjN7fJyOh64p5UGRmv-UTnF47cERDfbHyHTuzQmQj8xTDEOQ-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2014-12-01 17:23 ` Wolfram Sang
2014-12-01 17:23 ` Wolfram Sang
2014-12-11 13:44 ` Valentin Longchamp
2014-12-11 13:44 ` Valentin Longchamp
[not found] ` <54899FB4.9010207-SkAbAL50j+5BDgjK7y7TUQ@public.gmane.org>
2014-12-23 13:23 ` Valentin Longchamp
2014-12-23 13:23 ` Valentin Longchamp
[not found] ` <54996CB5.8030808-SkAbAL50j+5BDgjK7y7TUQ@public.gmane.org>
2014-12-23 13:49 ` Wolfram Sang
2014-12-23 13:49 ` Wolfram Sang
2014-12-27 2:43 ` Scott Wood
2014-12-27 2:43 ` Scott Wood
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