Re: [linux-audio-dev] muse and /dev/rtc

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Subject: Re: [linux-audio-dev] muse and /dev/rtc
From: Matthias Nagorni (mana_AT_suse.de)
Date: Mon Nov 22 2004 - 17:33:52 EET

On Mon, 22 Nov 2004, Alfons Adriaensen wrote:

> On Sun, Nov 21, 2004 at 03:02:24PM -0500, Lee Revell wrote:
>
> > > CONFIG_APM_RTC_IS_GMT=y
> > > CONFIG_RTC=m
> > > CONFIG_GEN_RTC=m
> > > CONFIG_GEN_RTC_X=y
> > > CONFIG_HPET_RTC_IRQ=y
> > > CONFIG_SENSORS_RTC8564=m
> > > CONFIG_SND_RTCTIMER=m
> > >
> >
> > OK this all looks good. I don't know, it sounds like a bug in Muse.
> > There must be some incompatibility using a binary Suse Muse package with
> > a Mandrake kernel.
>
> Maybe it doesn't look good. I found this (the message is in French,
> but the quoted part says it all): if CONFIG_HPET_RTC_IRQ is defined,
> then RTC_IRQ is undefined which in turn leads to the failing ioctl().

Exactly: If you set

CONFIG_HPET_RTC_IRQ=n

and recompile the (SuSE 9.2-)kernel, MusE should work.

Matthias

>
>
>
> <http://www.guilde.asso.fr/lurker/message/20041105.180307.b02820a2.en.html>
>
>
>
> include/asm-i386/mc146818rtc.h :
>
> #define RTC_IRQ 8
>
>
> drivers/char/rtc.c :
>
> #ifdef CONFIG_HPET_RTC_IRQ
> #undef RTC_IRQ
> #endif
>
>
> .config :
>
> CONFIG_HPET=y
> CONFIG_HPET_RTC_IRQ=y
>
>
> drivers/char/Kconfig :
>
> config HPET
> bool "HPET - High Precision Event Timer" if (X86 || IA64)
> default n
> depends on ACPI_INTERPRETER
> help
> If you say Y here, you will have a miscdevice named
> "/dev/hpet/". Each open selects one of the timers supported
> by the HPET. The timers are non-periodioc and/or periodic.
>
>
> config HPET_RTC_IRQ
> bool "HPET Control RTC IRQ" if !HPET_EMULATE_RTC
> default n
> depends on HPET
> help
> If you say Y here, you will disable RTC_IRQ in
> drivers/char/rtc.c. It is assumed the platform called
> hpet_alloc with the RTC IRQ values for the HPET timers.
>
>
> 

-- 
Dr. Matthias Nagorni
SuSE Linux GmbH
Maxfeldstr. 5             phone: +49 911 74053375
D - 90409 Nuernberg       fax  : +49 911 74053483

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