Hi, I own a Sahara Touch-iT Slate PC for wich I received from the manufacturer a the source to a kernel module for setting the backlight intensity. This source is meant to be compiled to a module and works quite fine with kernel 2.6.16. I wanted to see if I can adapt a current linux kernel source to include this module. So I fetched the current source (first 2.6.18, later 2.6.19-rc1) and took a look at the other sources in drivers/video/backlight especially the corgi_bl.c. I modified the orignal source I received to as closly match the corgi_bl.c. Now I got one problem/thing I don't understand. The original source called in its module init function backlight_device_register. The corgi_bl.c doesn't do that. Instead its init function calls platform_driver_register passing it a platform_driver struct. This in turn references a probe function which does the backlight_device_register. So I did the same in my source, and it does not work as I would expect. The init function is called and I see the printk output in syslog. But the probe function is never called, no printk output in syslog and also the files in /sys/class/backlight never appear. Now I wonder, what am I missing. What must be done, so that the probe function is called? You can find a patch which can be applied to either the 2.6.18 or the 2.6.19-rc1 kernel source together the config file and a list of steps I use to build the kernel on http://claudio.ch/p/6.html. The URL of the patch itself is http://claudio.ch/p/kb3886.patch claudio -- Claudio Nieder, Kanalweg 1, CH-8610 Uster, Tel +41 79 357 6743 yahoo messenger: claudionieder aim: claudionieder icq:42315212 mailto:private@xxxxxxxxxx http://www.claudio.ch
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