Coding device driver for a minor device.
kj-list at jeppesens.com
Sun Apr 8 15:34:11 EST 2001
Looking through it I decided for major 10, minor 156, the lcd front panel.
It is not merely a local use device rather I have a new ppc platform which
has a front VFD, two push buttons and a tri-state led.
> From: David Schleef <ds at schleef.org>
> Reply-To: David Schleef <ds at schleef.org>
> Date: Sat, 7 Apr 2001 17:53:34 -0700
> To: Karsten Jeppesen <karsten at jeppesens.com>
> Cc: linuxppc-dev at lists.linuxppc.org
> Subject: Re: Coding device driver for a minor device.
> On Sat, Apr 07, 2001 at 12:42:19PM -0700, Karsten Jeppesen wrote:
>> I have done modules.
>> Now the problem is that I have 2 pushbuttons that I would like to read.
>> Looking in the device list I see dev 10, which has a lot of - let us call it
>> miscellaneous - content. This one seems to fit here. Maybe as a minor 185 or
>> But how do I locate the device driver for device major 10?
>> I am certain there is a simple way - somebody knows it?
> See linux/include/linux/miscdevice.h. And you should probably use
> a minor in the range of 240-255, as those are reserved for local
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