From mboxrd@z Thu Jan  1 00:00:00 1970
From: Russell King - ARM Linux <linux@arm.linux.org.uk>
Subject: Re: nvram and generic_nvram modules are problematic, was Re: [PATCH]
 arch: m68k: mac: misc.c: Remove some unused functions
Date: Sun, 1 Feb 2015 08:42:45 +0000
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To: Finn Thain <fthain@telegraphics.com.au>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>, linux-m68k@lists.linux-m68k.org, linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, Rickard Strandqvist <rickard_strandqvist@spectrumdigital.se>

On Sun, Feb 01, 2015 at 02:39:42PM +1100, Finn Thain wrote:
> I find the ARM support in drivers/char/nvram to be surprising, not to say 
> questionable. The /proc/driver/nvram implementation, given 
> defined(__arm__), decodes the NVRAM contents in exactly the same format as 
> when defined(__i386__) || defined(__x86_64__).

That's because it's used on the Netwinder and EBSA285 platforms, which
are PCI-like, complete with a southbridge which makes them look like a
PC.

> Whereas, only MIPS and 
> PowerPC defconfigs set CONFIG_RTC_DRV_CMOS at all, and without that symbol 
> the driver will never be built for ARM. This raises the question, does 
> /proc/driver/nvram do anything useful on any ARM platforms?

Yes.

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