[Buildroot] hwclock again

[Buildroot] hwclock again

[JNY]

Hi,

I've enabled 
CONFIG_RTC=y
CONFIG_GEN_RTC=y
in linux-2.6.32.9.config and set the environment variable to read this file. 
After building and installing, I still get '/dev/misc/rtc': No such file or
directory when I use hwclock.

Why won't the hwclock work?
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[Buildroot] hwclock again

[Anders Darander]

Hi,

On Thu, Sep 2, 2010 at 13:29, JNY <jny0@hotmail.com> wrote:
> After building and installing, I still get '/dev/misc/rtc': No such file or
> directory when I use hwclock.

Just to check...
Do you have such a device (/dev/misc/rtc) in the target file system?

Regards,
Anders

(I'm resending, as I missed to CC the mailinglist).

[Buildroot] hwclock again

[JNY]

just to check...
Do you have such a device (/dev/misc/rtc) in the target file system?

Regards,
Anders

-------------------

I have two targets target_skeleton, and target_busybox_skeleton (both
contained in target/generic), neither of which contain /dev/misc/rtc. 
However, neither contain ttyS0, and that ends up on the system when it's
loaded, and works.  What's going on?
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[Buildroot] hwclock again

[Anders Darander]

Hi,

On Thu, Sep 2, 2010 at 13:50, JNY <jny0@hotmail.com> wrote:
>
> just to check...
> Do you have such a device (/dev/misc/rtc) in the target file system?
>
> Regards,
> Anders
>
> -------------------
>
> I have two targets target_skeleton, and target_busybox_skeleton (both
> contained in target/generic), neither of which contain /dev/misc/rtc.
> However, neither contain ttyS0, and that ends up on the system when it's
> loaded, and works. ?What's going on?

Well, I meant the target file system being generated, not the actual
skeletons... Either loopback mount the generated file system, generate
tar:ed file system, or look directly at your target.

You'll also have a file, device_table.txt, that, among other things,
specifies device nodes to be generated. You'll most certainly find
ttyS0 being generated from this file.

Regards,
Anders

[Buildroot] hwclock again

[Thomas Petazzoni]

On Thu, 2 Sep 2010 04:29:07 -0700 (PDT)
JNY <jny0@hotmail.com> wrote:

> I've enabled 
> CONFIG_RTC=y
> CONFIG_GEN_RTC=y
> in linux-2.6.32.9.config and set the environment variable to read
> this file. After building and installing, I still get
> '/dev/misc/rtc': No such file or directory when I use hwclock.
> 
> Why won't the hwclock work?

Because nobody created /dev/misc/rtc. By default, Buildroot uses a
static /dev, so you have to manually add the missing device files.

Thomas
-- 
Thomas Petazzoni, Free Electrons
Kernel, drivers, real-time and embedded Linux
development, consulting, training and support.
http://free-electrons.com