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

[Alfons Adriaensen]

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().



<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.


-- 
FA