[parisc-linux] Re: E55 status - THE DRIVER !

Christoph Plattner christoph.plattner@gmx.at
Wed, 21 Nov 2001 20:16:40 +0100

Hello again,

Are you able to write the drivers ?
Do you have the documentation for that ?
I have problems with my spare time, but I am also interested in writing
drivers (especially for my machine !)

Which drivers will you write ?
MUX ?, SCSI ? (parallel port ?)


Ryan Bradetich wrote:
> Hello Christoph,
> I have integrated your patch into my tree, and have been testing out the
> patch on my C200+ and the K460.  With the PDC console patch, I do get to
> the console on the K460 which is great news.  I am still going to work
> on the driver for the actual hardware (in my case the Eole CAP/MUX, and
> in your case the Sahp Baat Kiuh AP/MUX), but this is a nice work around
> until that work is finished.
> When integrating your patch into my tree, I made the following changes:
> * Dropped the LCD support.
>         I do not understand this portion of the code very well, and it  had
> some uglyness that made me feel uneasy to commit to the tree.   Someone
> else should look at this and integrate it properly.
> * Renamed the pdc_drv to pdc_console.
>         Just seemed more accurate to me .. I am open for other opinions
>         on this.
> * Added the configure option and help text for the PDC software console.
> * Inegerated CONFIG_PDC_CONSOLE into the drivers/char/Makefile.
> * Integrated CONFIG_PDC_CONSOLE into arch/parisc/kernel/pdc_cons.c and
>         performed some minor cleanups.
> * probably other things I've forgotten :)
> Overall I though the patch looked great, but I still have 1 concern left
> and that is about the major number.
> According to Documentation/devices.txt major number 30 is reserved for:
>  30 char        iBCS-2 compatibility devices
> I understand about --><-- much about how major numbers are handled and I
> know this is a topic of debate among the main stream kernel developers.
> If we ever want to move this driver into the mainstream kernel this
> issue will probably need to be resolved ... and I have no idea on how to
> proceed.  Maybe others on this list will have an idea, or when the time
> comes we will need to address this on the lkml.  Before I commit this
> patch to the CVS repository, I'd like to get some concensus on this list
> about what is right.  (ie for the debian installer to work with this
> device, /dev/ttyB0 will need to be added to the MAKEDEV package, etc).
> Anyways the patch is available for feedback at:
> ftp://ftp.parisc-linux.org/patches/pdc_console.diff
> I am still working on testing this driver ... I would be very happy to
> see install the K460 using the debian installer using this patch.  I am
> currently working on making that happen.
> Thanks,
> - Ryan

private:	christoph.plattner@gmx.at
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