linux-kernel - Re: char: legacy RTC cleanups

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Date:	Wed, 27 Apr 2016 13:30:05 +0200
From:	Arnd Bergmann <arnd@...db.de>
To:	Geert Uytterhoeven <geert@...ux-m68k.org>
Cc:	Alexandre Belloni <alexandre.belloni@...e-electrons.com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Tony Luck <tony.luck@...el.com>,
	"James E.J. Bottomley" <jejb@...isc-linux.org>,
	Helge Deller <deller@....de>,
	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	Michael Ellerman <mpe@...erman.id.au>,
	Rich Felker <dalias@...c.org>,
	David Howells <dhowells@...hat.com>,
	Koichi Yasutake <yasutake.koichi@...panasonic.com>,
	Richard Henderson <rth@...ddle.net>,
	Ivan Kokshaysky <ink@...assic.park.msu.ru>,
	alpha <linux-alpha@...r.kernel.org>,
	the arch/x86 maintainers <x86@...nel.org>,
	Alessandro Zummo <a.zummo@...ertech.it>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-ia64@...r.kernel.org" <linux-ia64@...r.kernel.org>,
	Parisc List <linux-parisc@...r.kernel.org>,
	"linuxppc-dev@...ts.ozlabs.org" <linuxppc-dev@...ts.ozlabs.org>,
	Linux-sh list <linux-sh@...r.kernel.org>,
	RTCLINUX <rtc-linux@...glegroups.com>,
	Linux-Arch <linux-arch@...r.kernel.org>
Subject: Re: char: legacy RTC cleanups

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@...ycom.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