Reading a config file in a driver ....

Misbah khan misbah_khan at
Fri Jan 4 19:36:06 EST 2008

Could you please let me know How in the driver i could be able to read the
file present in sysfs ??? Using init script how should i creat and edit the
file ????

I never had done these hence your suggession could be a better way for me to
learn it .


Olof Johansson-2 wrote:
> On Wed, Jan 02, 2008 at 09:03:20PM -0800, Misbah khan wrote:
>> Hi all ....
>> I am writing a LCD driver in which the default configuration for LCD
>> would
>> be loded at the Init . This default configuration if keep in the driver
>> then
>> for a change in default configuration we need to compile the driver which
>> we
>> never want . Hence we want a .config file in /etc/lcd.config dir which
>> could
>> be changed and the next boot will take this configuration as the default
>> configuration. 
>> I need to know How to read from the config file in the driver form the
>> dir
>> /etc/lcd.config. The driver would be installed at boot up 
> The driver/kernel shouldn't read the file directly, if anything you
> should have a userspace tool that reads it and adjusts the driver via
> sysfs or similar. That tool can be run from some of the init scripts,
> or from the ramdisk in case you want to do it early.
> -Olof
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