linux-kernel - Re: [rtc-linux] state of GEN

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Message-ID: <48408394.8000406@am.sony.com>
Date:	Fri, 30 May 2008 15:45:40 -0700
From:	Geoff Levand <geoffrey.levand@...sony.com>
To:	Alessandro Zummo <alessandro.zummo@...ertech.it>
CC:	rtc-linux@...glegroups.com,
	linuxppc-dev list <linuxppc-dev@...abs.org>, rz@...ux-m68k.org,
	LKML Kernel <linux-kernel@...r.kernel.org>
Subject: Re: [rtc-linux] state of GEN_RTC vs rtc subsystem

Alessandro Zummo wrote:
> On Wed, 20 Feb 2008 10:11:23 -0600
> Kumar Gala <galak@...nel.crashing.org> wrote:
> 
>> 
>> Is the functionality provided by drivers/char/gen_rtc.c completely  
>> handled by the rtc subsystem in drivers/rtc?
>> 
>> I ask for two reasons:
>> 1. should we make it mutually exclusive in Kconfig
>> 2. I've enabled both and get (we'll my defconfig did):
> 
>  They shouldn't be enabled at once. I think a patch 
>  for Kconfig has been recently submitted to give a warning
>  in such a case.
> 
>  rtc-cmos should be able to handle the vast majority of x86
>  rtcs out there. 

gen_rtc was hooked up to the powerpc platform
ppc_md.set_rtc_time and ppc_md.get_rtc_time via the arch
specific get_rtc_time() and  set_rtc_time() routines.

>From what I can tell, those generic rtc routines the powerpc
arch provides are not properly hooked into the new rtc subsystem.
This causes problems for multi-platform builds where some platforms
must use gen_rtc, and some must the new rtc subsytem.

-Geoff


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