From: Arnd Bergmann <arnd@arndb.de>
To: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Alexandre Belloni <alexandre.belloni@free-electrons.com>,
        Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        Tony Luck <tony.luck@intel.com>,
        "James E.J. Bottomley" <jejb@parisc-linux.org>,
        Helge Deller <deller@gmx.de>,
        Benjamin Herrenschmidt <benh@kernel.crashing.org>,
        Michael Ellerman <mpe@ellerman.id.au>, Rich Felker <dalias@libc.org>,
        David Howells <dhowells@redhat.com>,
        Koichi Yasutake <yasutake.koichi@jp.panasonic.com>,
        Richard Henderson <rth@twiddle.net>,
        Ivan Kokshaysky <ink@jurassic.park.msu.ru>,
        alpha <linux-alpha@vger.kernel.org>,
        the arch/x86 maintainers <x86@kernel.org>,
        Alessandro Zummo <a.zummo@towertech.it>,
        "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
        "linux-ia64@vger.kernel.org" <linux-ia64@vger.kernel.org>,
        Parisc List <linux-parisc@vger.kernel.org>,
        "linuxppc-dev@lists.ozlabs.org" <linuxppc-dev@lists.ozlabs.org>,
        Linux-sh list <linux-sh@vger.kernel.org>,
        RTCLINUX <rtc-linux@googlegroups.com>,
        Linux-Arch <linux-arch@vger.kernel.org>
Subject: Re: char: legacy RTC cleanups
Date: Wed, 27 Apr 2016 13:30:05 +0200
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On Wednesday 27 April 2016 12:19:59 Geert Uytterhoeven wrote:
> >
> > Right, so we could skip patches 5 and 6, and instead remove the two
> > headers as we remove the driver. Let's see what the architecture
> > maintainers think about it, at least powerpc actually enables gen_rtc
> > in its defconfig, so it might take a while to move it over.
> 
> FWIW, all PPC defconfigs (except tqm8xx.dts, which is a more recent platform)
> enabling it did that long before my old commit to enable rtc-generic support
> on PPC:
> 
> commit bcd68a70cb0eee556d86d93133aa150319bd9f53
> Author: Geert Uytterhoeven <Geert.Uytterhoeven@sonycom.com>
> Date:   Thu Feb 19 16:50:46 2009 +0100
> 
>     powerpc: Hook up rtc-generic, and kill rtc-ppc

Ah, interesting. I have two observations about that patch:

- you were moving basically in the opposite direction that I am
  trying to bring it now. ;-)

- I see now that four defconfigs (gamecube, powernv, pseries and wii)
  do enable RTC_DRV_GENERIC. For some reason, ppc64_defconfig only
  enables RTC_DRV_DS1307, I assume that is not intentional.

	Arnd