linux-kernel - Re: [PATCH] ARM: fix DEBUG_UART_PHYS/VIRT issue when modifying DEBUG

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Message-ID: <20150617221004.58699b2e@free-electrons.com>
Date:	Wed, 17 Jun 2015 22:10:04 +0200
From:	Thomas Petazzoni <thomas.petazzoni@...e-electrons.com>
To:	Russell King - ARM Linux <linux@....linux.org.uk>
Cc:	Boris Brezillon <boris.brezillon@...e-electrons.com>,
	Arnd Bergmann <arnd@...db.de>, linux-kernel@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH] ARM: fix DEBUG_UART_PHYS/VIRT issue when modifying
 DEBUG_LL output

Russell,

On Wed, 17 Jun 2015 20:40:58 +0100, Russell King - ARM Linux wrote:

> > Russell, what do you think of the proposed approach?
> 
> I'd rather we killed all the defaults, rather than keep trying to fix
> these subtle issues.  That was always my goal of converting to this
> model anyway.
> 
> However, I think it's important not to loose this information (how many
> of us with lots of different platforms want to keep on digging through
> PDFs to try and find this documentation?)  I'd like to see a per-SoC
> file somewhere in Documentation/arm/ giving these details so at least
> they're relatively easy to find.

I personally find having the defaults for various popular platforms
readily available in menuconfig to be a lot easier than having to dig
some documentation to find the appropriate addresses.

I.e, the current way is perfect. It's just that there is no need to
show the physical/virtual addresses if an existing well-known platform
is selected, especially as it causes weird behavior due to how kconfig
works. Which Boris patch is solving.

Best regards,

Thomas
-- 
Thomas Petazzoni, CTO, Free Electrons
Embedded Linux, Kernel and Android engineering
http://free-electrons.com
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