Date: Wed, 24 Nov 2010 12:13:14 -0600
From: Scott Wood <scottwood@freescale.com>
To: <michael@ellerman.id.au>
CC: Timur Tabi <timur@freescale.com>, Greg KH <gregkh@suse.de>,
        Arnd Bergmann <arnd@arndb.de>,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
        Stuart Yoder <stuart.yoder@freescale.com>,
        <devicetree-discuss@lists.ozlabs.org>
Subject: Re: How do I choose an arbitrary minor number for my tty device?
Message-ID: <20101124121314.503dd860@udp111988uds.am.freescale.net>
In-Reply-To: <1290594227.4446.12.camel@concordia>
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 <20101117221903.GA4066@suse.de>
 <4CE45A4E.70308@freescale.com>
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 <4CE546C5.8060401@freescale.com>
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 <4CE54E40.9040503@freescale.com>
 <20101118112146.3275eb08@udp111988uds.am.freescale.net>
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[sorry for the resend, fixed the devtree list address]

On Wed, 24 Nov 2010 21:23:47 +1100
Michael Ellerman <michael@ellerman.id.au> wrote:

> On Thu, 2010-11-18 at 12:13 -0600, Scott Wood wrote:
> > Unfortunately, it's not an exact match, and the fact that reg doesn't
> > translate to a physical address means that AFAICT you'll currently get
> > something like "byte-channel.nnn", where "nnn" is an arbitrary
> > kernel-assigned number.
> 
> Can you not use device_rename() ?

Ah, didn't know about that.  Still, might be nice to add support for
"handle" nodes at the infrastructure level rather than in each driver.

> > It would be nice if platform devices that are created from device tree
> > nodes included a link to the corresponding /proc/device-tree node in
> > their sysfs node.
> 
> It's not a link, but the OF path is in devspec, so you can work it out
> fairly easily.

Hmm, I see a "devspec" in PCI devices, but not in devtree-probed
platform devices.  of_bus_type_init isn't being called from anywhere
but the ibmebus code.  It looks like this was a casualty of merging
of_platform with platform (commit eca3930163ba8884060ce9d9ff5ef0d9b7c7b00f).

-Scott

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