[poky] load kernel module at startup

[Martin Jansa]

On Wed, Apr 20, 2011 at 08:49:35AM -0700, Darren Hart wrote:
> 
> 
> On 04/20/2011 08:31 AM, Martin Jansa wrote:
> > On Wed, Apr 20, 2011 at 08:25:38AM -0700, Darren Hart wrote:
> >>
> >>
> >> On 04/11/2011 02:38 AM, Gerard van den Bosch wrote:
> >>> Hello,
> >>>
> >>> I would like to modprobe my wireless driver kernel module at startup 
> >>> automatically.
> >>>
> >>> This works when I generate a rootfs and then boot up the first time so 
> >>> the modules file gets generated and then I can manually add the kernel 
> >>> module in that file and then reboot.
> >>>
> >>> When I look in the manpage of update-modules it states that a config 
> >>> file should be added in /etc/modutils but that directory is not in my 
> >>> rootfs.
> >>>
> >>> So I was wondering what I have to do to get /etc/modutils directory or 
> >>> an other way to get the kernel module loaded at startup.
> >>>
> >>> I am using the Poky 4.0 Laverne release.
> >>
> >> I believe you can just add the name of the module to:
> >>
> >> /etc/modules
> >>
> >> Can you try that?
> > 
> > module_autoload_module_name to do that, is not supported in Poky?
> 
> I am not familiar with this technique.

I've checked Poky 5.0 and according to git log it was there from the
beginning, so also in Poky 4.0. And also it's inherited by
linux-yocto(-stable).

if you read classes/kernel.bbclass you'll notice ie:
module_autoload_ipv6 = "ipv6"

which adds postinst to kernel-module-ipv6 package to "modprobe ipv6" and
also creates /etc/modutils/ipv6 file with "ipv6" in it to autoload ipv6
module after reboot.

similar
module_conf_bluez = "alias net-pf-31 bluez"
creates
/etc/modprobe.d/bluez.conf (or /etc/modutils/bluez.conf for 2.4 kernel)
with "alias net-pf-31 bluez"

and those files are added to kernel-module-something FILES, so removing
module removes autoload and config with it properly.

Regards,
-- 
Martin 'JaMa' Jansa     jabber: Martin.Jansa at gmail.com
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