From: Yegor Yefremov <yegor_sub1@visionsystems.de>
To: buildroot@busybox.net
Subject: [Buildroot] Inappropriate ioctl - hwclock
Date: Fri, 14 Jan 2011 09:53:45 +0100 [thread overview]
Message-ID: <4D300F19.70704@visionsystems.de> (raw)
In-Reply-To: <20110114094245.78bf04ff@surf>
Am 14.01.2011 09:42, schrieb Thomas Petazzoni:
> On Thu, 13 Jan 2011 09:55:41 +0000
> Johnny Beardsmore <jny0@hotmail.com> wrote:
>
>> I've copied the hwclock and rtc files onto my architecture, but when I call hwclock, I get the following message:
>>
>> RTC_RD_TIME: Inappropriate ioctl for device
>> ioctl() to /dev/misc/rtc to read the time failed.
>>
>> Any ideas what I've done wrong?
>
> This is not really Buildroot related, but anyway.
>
> Are you sure that /dev/misc/rtc is a really a RTC device ? The
> RTC_RD_TIME ioctl() is implemented in the core RTC infrastructure of
> the kernel, so it looks like you're not talking to the right device, or
> using a really really old version of the kernel that didn't support
> this ioctl(). Or that your kernel lacks RTC support completely.
I agree, /dev/misc/rtc is not a default rtc device. If you look at the kernel RTC configuration ("Device Drivers"->"Real Time Clock"), you'll see the following option:
/dev/rtcN (character devices)
Yegor
prev parent reply other threads:[~2011-01-14 8:53 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-01-13 9:55 [Buildroot] Inappropriate ioctl - hwclock Johnny Beardsmore
2011-01-14 8:42 ` Thomas Petazzoni
2011-01-14 8:53 ` Yegor Yefremov [this message]
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