linux-kernel - Fwd: [rtc-linux] RTC_SET_TIME: Inappropriate ioctl for device

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Message-ID: <AANLkTinJeMKBzsBwgSLcHXtexM2oI3S97HO8IPri9EA7@mail.gmail.com>
Date:	Tue, 8 Jun 2010 22:34:33 +0800
From:	Wan ZongShun <mcuos.com@...il.com>
To:	linux-kernel <linux-kernel@...r.kernel.org>,
	linux-rtc <rtc-linux@...glegroups.com>, jeffjway@...il.com
Subject: Fwd: [rtc-linux] RTC_SET_TIME: Inappropriate ioctl for device

CC to LKML to do further discussion.

---------- Forwarded message ----------
From: Wan ZongShun <mcuos.com@...il.com>
Date: 2010/6/8
Subject: Re: [rtc-linux] RTC_SET_TIME: Inappropriate ioctl for device
To: rtc-linux@...glegroups.com, jeffjway@...il.com

Hi Jeff,

2010/6/8 JJeff <jeffjway@...il.com>:
> Whenever I try to run 'hwclock', I get the error:
> "RTC_RD_TIME: Inappropriate ioctl for device:"
> or
> " RTC_SET_TIME: Inappropriate ioctl for device"
> if I run it with the -w option
>

Both of errors indicate your user layer or kernel driver is using a
wrong IOCTL command,
maybe your RTC_RD_TIME of user layer doesnot match the  RTC_RD_TIME of
kernel layer.
so driver return a '--ENOTTY' error no.

The better thing is you can write a rtc test application to identify
your driver works well.

Maybe you can change other version hwclock for testing.

> Is the hwclock too old a version or something?  The option --version
> is not recognised.
>
>
> I'm trying to use the hwclock command to sync the time each bootup, so
> any other ideas as to how to do it would be good too.
>
> Thanks
>
> Jeff
>
> --
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