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From: Wolfgang Denk <wd@denx.de>
To: u-boot@lists.denx.de
Subject: [U-Boot] [PATCH] ns16550: allow UART address to be set dynamically
Date: Thu, 13 Dec 2012 15:22:13 +0100	[thread overview]
Message-ID: <20121213142213.7618D20120D@gemini.denx.de> (raw)
In-Reply-To: <50C9D41B.7010800@ti.com>

Dear Tom Rini,

In message <50C9D41B.7010800@ti.com> you wrote:
>
> > Where would the device addresses come from - out of the device
> > tree?
> 
> Board specific knowledge.  I'd be tempted to add UART3 (iirc) into the
> am335x_evm default build so that we can support the Industrial DevKit
> variant out of the box, rather than needing one of the other _uartN
> builds.  We can tell which board we're on at run-time already.

I'm afraid this doesn't scale.  You are opening a can of worms here.
The UART port may seem simple enough, but you set a precedent.  Next
comes some netowrk interface configuration, then if we have a RTC,
followed by LCD properties, and so on.

We have two ways to configure hardware properties:
- static configuration in the board config file
- dynamic configuration through the device tree

Please do not start adding other methods.

Best regards,

Wolfgang Denk

-- 
DENX Software Engineering GmbH,     MD: Wolfgang Denk & Detlev Zundel
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd at denx.de
panic: can't find /

      reply	other threads:[~2012-12-13 14:22 UTC|newest]

Thread overview: 39+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2012-12-12 23:23 [U-Boot] [PATCH] ns16550: allow UART address to be set dynamically Stephen Warren
2012-12-12 23:38 ` Simon Glass
2012-12-12 23:52   ` Stephen Warren
2012-12-13  0:38     ` Simon Glass
2012-12-13 10:29     ` Wolfgang Denk
2012-12-13 18:17       ` Stephen Warren
2012-12-13 20:36         ` Wolfgang Denk
2012-12-13 20:45           ` Stephen Warren
2012-12-13 20:53             ` Tom Rini
2012-12-13 21:07               ` Stephen Warren
2012-12-13 21:51                 ` Simon Glass
2012-12-14 20:40                   ` Tom Rini
2012-12-14 21:14                     ` Simon Glass
2012-12-14 22:03                       ` Stephen Warren
2012-12-14 22:22                         ` Simon Glass
2012-12-14 22:45                           ` Stephen Warren
2012-12-17 21:09                             ` Tom Rini
2012-12-17 22:24                               ` Stephen Warren
2012-12-17 22:37                                 ` Wolfgang Denk
2012-12-17 22:58                                   ` Stephen Warren
2012-12-18  6:39                                     ` Wolfgang Denk
2012-12-18 16:37                                       ` Stephen Warren
2012-12-18 19:15                                         ` Simon Glass
2012-12-17 21:09                           ` Tom Rini
2012-12-14 22:35                         ` Wolfgang Denk
2012-12-14 21:52                     ` Stephen Warren
2012-12-14 22:31                       ` Wolfgang Denk
2012-12-14 22:26                     ` Wolfgang Denk
2012-12-14 23:16                       ` Graeme Russ
2012-12-15  0:32                         ` Wolfgang Denk
2012-12-15  1:32                           ` Graeme Russ
2012-12-15  7:30                             ` Wolfgang Denk
2012-12-15  9:53                               ` Graeme Russ
2012-12-17 21:04                       ` Tom Rini
2012-12-13 23:11             ` Wolfgang Denk
2012-12-13 23:26               ` Stephen Warren
2012-12-13 10:27 ` Wolfgang Denk
2012-12-13 13:11   ` Tom Rini
2012-12-13 14:22     ` Wolfgang Denk [this message]

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