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From: Segher Boessenkool <segher@kernel.crashing.org>
To: "Stephen Neuendorffer" <stephen.neuendorffer@xilinx.com>
Cc: John Linn <linnj@xilinx.com>,
	linuxppc-dev@ozlabs.org, Paul Mackerras <paulus@samba.org>
Subject: Re: [PATCH 2/3] [POWERPC] Xilinx: of_serial support for Xilinx uart16550.
Date: Fri, 21 Mar 2008 17:48:30 +0100	[thread overview]
Message-ID: <87477fcc1ac591dc6b76d84caa99ac59@kernel.crashing.org> (raw)
In-Reply-To: <20080321160802.7CED7196805C@mail103-sin.bigfish.com>

> I thought about this, and reconsidered it again after I finally figured
> out how to get the Power.org website to relenquish the ePAPR spec, 
> which
> (FWIW) has reg-shift as an optional property of the ns16550 binding.
>
> However, I'm not enamoured of it, since I doubt it's really good to be
> doing ioremaps and memory management on unaligned blocks.  It seems 
> more
> logical to me to have the reg property define a range of aligned
> addresses, and in this case, it happens that the driver never touches
> some of those bytes.

Yes, and that is (part of) why "reg-offset" might be needed /
might be a good idea.

> In any event, the real point of the patch was to spark some discussion,
> which we failed to get otherwise.. :)

You succeeded :-)


Segher

  reply	other threads:[~2008-03-21 16:48 UTC|newest]

Thread overview: 29+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <12060242324116-git-send-email-john.linn@xilinx.com>
2008-03-20 14:43 ` [PATCH 2/3] [POWERPC] Xilinx: of_serial support for Xilinx uart 16550 John Linn
2008-03-21  0:19   ` Grant Likely
2008-03-21  9:21     ` Paul Mackerras
2008-03-21 11:39       ` Segher Boessenkool
2008-03-21 16:08         ` [PATCH 2/3] [POWERPC] Xilinx: of_serial support for Xilinx uart16550 Stephen Neuendorffer
2008-03-21 16:48           ` Segher Boessenkool [this message]
2008-03-22 14:50       ` [PATCH 2/3] [POWERPC] Xilinx: of_serial support for Xilinx uart 16550 Grant Likely
2008-03-22 16:06         ` Sergei Shtylyov
2008-03-24 14:09         ` Sergei Shtylyov
2008-03-24 14:27           ` Grant Likely
2008-03-24 16:15             ` Sergei Shtylyov
2008-03-24 16:48               ` Grant Likely
2008-03-24 17:03               ` Sergei Shtylyov
2008-03-25 22:48                 ` John Linn
2008-03-21 13:00     ` Sergei Shtylyov
2008-03-21 15:37       ` Segher Boessenkool
2008-03-21 15:54         ` Sergei Shtylyov
2008-03-21 16:45           ` Segher Boessenkool
2008-03-21 16:50             ` [PATCH 2/3] [POWERPC] Xilinx: of_serial support for Xilinx uart16550 Stephen Neuendorffer
2008-03-21 17:01             ` [PATCH 2/3] [POWERPC] Xilinx: of_serial support for Xilinx uart 16550 Sergei Shtylyov
2008-03-22 15:06       ` Grant Likely
2008-03-22 16:40         ` Sergei Shtylyov
2008-03-21 16:14     ` [PATCH 2/3] [POWERPC] Xilinx: of_serial support for Xilinx uart16550 Stephen Neuendorffer
     [not found] ` <1206024232655-git-send-email-john.linn@xilinx.com>
2008-03-20 14:43   ` [PATCH 3/3] [POWERPC] Xilinx: boot support for Xilinx uart 16550 John Linn
2008-03-20 14:54     ` Grant Likely
2008-03-20 16:15       ` John Linn
2008-03-20 21:18         ` Grant Likely
     [not found]       ` <20080320175601.5D86217C8055@mail127-sin.bigfish.com>
2008-03-20 21:07         ` Grant Likely
2008-03-20 22:04     ` Grant Likely

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