From: Mitch Bradley <wmb-D5eQfiDGL7eakBO8gow8eQ@public.gmane.org>
To: Rob Herring <robherring2-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
Cc: device-tree
<devicetree-discuss-uLR06cmDAlY/bJ5BZ2RsiQ@public.gmane.org>,
linux-omap <linux-omap-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>,
linux-arm
<linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org>,
Tarun Kanti DebBarma <tarun.kanti-l0cyMroinI0@public.gmane.org>
Subject: Mis?use of aliases
Date: Fri, 13 Jul 2012 19:30:42 -1000 [thread overview]
Message-ID: <50010402.3050502@firmworks.com> (raw)
In-Reply-To: <5000D647.4090200-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
> I'm not sure this is really a good use of aliases. UARTs use aliases
> because it is important that the UART number to tty number is known and
> fixed.
This brings up an issue that I've been meaning to comment on.
The use of phandle-valued properties in the aliases node causes real OFW
implementations some amount of heartburn. The Open Firmware standard
says that the properties in /aliases are string-valued. That's
important, because aliases are shorthand for fragments of full device
specifiers (pathnames that can include arguments to nodes). Phandles
can point to nodes, but can't be relative, and can't encode
per-node-component arguments.
For binding a Linux unit number to a device node, I would prefer to
decorate the node with a property like "linux,unit#", instead of
breaking the standard semantics of /aliases.
Mitch
next prev parent reply other threads:[~2012-07-14 5:30 UTC|newest]
Thread overview: 65+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-07-13 22:26 [RFC RESEND 0/4] ARM: OMAP3+: Add device-tree support for timers Jon Hunter
2012-07-13 22:26 ` Jon Hunter
2012-07-13 22:26 ` [RFC RESEND 1/4] arm/dts: OMAP: Add timer nodes Jon Hunter
2012-07-13 22:26 ` Jon Hunter
2012-07-14 2:15 ` Rob Herring
2012-07-14 2:15 ` Rob Herring
[not found] ` <5000D647.4090200-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2012-07-14 5:30 ` Mitch Bradley [this message]
[not found] ` <50010402.3050502-D5eQfiDGL7eakBO8gow8eQ@public.gmane.org>
2012-07-14 16:37 ` Mis?use of aliases David Gibson
2012-07-14 16:37 ` David Gibson
[not found] ` <20120714163701.GI11326-MK4v0fQdeXQXU02nzanrWNbf9cGiqdzd@public.gmane.org>
2012-07-14 17:07 ` Mitch Bradley
2012-07-14 17:07 ` Mitch Bradley
[not found] ` <5001A745.3000509-D5eQfiDGL7eakBO8gow8eQ@public.gmane.org>
2012-07-15 7:39 ` David Gibson
2012-07-15 7:39 ` David Gibson
2012-07-14 6:56 ` [RFC RESEND 1/4] arm/dts: OMAP: Add timer nodes Paul Walmsley
2012-07-14 6:56 ` Paul Walmsley
2012-07-14 14:01 ` Rob Herring
2012-07-14 14:01 ` Rob Herring
[not found] ` <50017BB1.8010702-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2012-07-14 17:42 ` Paul Walmsley
2012-07-14 17:42 ` Paul Walmsley
2012-07-16 17:48 ` Paul Walmsley
2012-07-16 17:48 ` Paul Walmsley
2012-07-16 15:56 ` Jon Hunter
2012-07-16 15:56 ` Jon Hunter
2012-07-18 7:19 ` Tony Lindgren
2012-07-18 7:19 ` Tony Lindgren
2012-07-18 15:11 ` Jon Hunter
2012-07-18 15:11 ` Jon Hunter
2012-07-23 15:24 ` Jon Hunter
2012-07-23 15:24 ` Jon Hunter
2012-08-15 9:11 ` Vaibhav Hiremath
2012-08-15 9:11 ` Vaibhav Hiremath
2012-08-16 15:04 ` Jon Hunter
2012-08-16 15:04 ` Jon Hunter
2012-08-30 20:14 ` Tony Lindgren
2012-08-30 20:14 ` Tony Lindgren
2012-09-07 20:26 ` Jon Hunter
2012-09-07 20:26 ` Jon Hunter
2012-09-07 20:56 ` Tony Lindgren
2012-09-07 20:56 ` Tony Lindgren
2012-09-07 21:16 ` Jon Hunter
2012-09-07 21:16 ` Jon Hunter
2012-09-06 13:45 ` Rob Herring
2012-09-06 13:45 ` Rob Herring
[not found] ` <5048A8F6.6080108-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2012-09-07 2:09 ` Jon Hunter
2012-09-07 2:09 ` Jon Hunter
2012-07-13 22:26 ` [RFC RESEND 2/4] ARM: OMAP3: Dynamically disable secure timer nodes for secure devices Jon Hunter
2012-07-13 22:26 ` Jon Hunter
2012-08-15 9:13 ` Vaibhav Hiremath
2012-08-15 9:13 ` Vaibhav Hiremath
2012-08-16 16:57 ` Jon Hunter
2012-08-16 16:57 ` Jon Hunter
[not found] ` <502D2686.4090107-l0cyMroinI0@public.gmane.org>
2012-08-17 5:32 ` Hiremath, Vaibhav
2012-08-17 5:32 ` Hiremath, Vaibhav
2012-08-17 12:24 ` Jon Hunter
2012-08-17 12:24 ` Jon Hunter
2012-08-24 15:56 ` Hiremath, Vaibhav
2012-08-24 15:56 ` Hiremath, Vaibhav
2012-07-13 22:26 ` [RFC RESEND 3/4] ARM: OMAP4: Add timer clock aliases for device-tree Jon Hunter
2012-07-13 22:26 ` Jon Hunter
2012-07-13 22:26 ` [RFC RESEND 4/4] ARM: OMAP: Add DT support for timer driver Jon Hunter
2012-07-13 22:26 ` Jon Hunter
2012-07-13 23:41 ` Paul Walmsley
2012-07-13 23:41 ` Paul Walmsley
[not found] ` <alpine.DEB.2.00.1207131740460.25585-rwI8Ez+7Ko+d5PgPZx9QOdBPR1lH4CV8@public.gmane.org>
2012-07-14 0:57 ` Jon Hunter
2012-07-14 0:57 ` Jon Hunter
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