Re: Correct location for ADC/DAC drivers

On Fri 4 May 2007 04:54, Stefan Roese pondered:

On Friday 04 May 2007 10:24, Robert Schwebel wrote:

quoted

On Tue, May 01, 2007 at 02:35:44PM +0200, Stefan Roese wrote:

quoted

I'm in the stage of integrating some ADC and DAC drivers for the AMCC
405EZ PPC and looking for the correct location to place these drivers
in the Linux source tree. The drivers are basically character-drivers,
so my first thought is to put them in "drivers/char/adc/foo.c" or
"drivers/char/adc_foo.c". Is this a good solution?

Any suggestions welcome (could be that I missed an already existing
example).

BTW: I am aware of the hwmon subsystem, but I don't think it fits my
needs in this case.

Could you elaborate the requirements a bit more? ADC is not ADC, because
slow i2c ADCs which measure a temperature every five minutes have other
requirements than multi-megabyte-per-second-dma-driven ADCs.

The hardware (PPC405EZ) actually implements an high speed, dma capable, ADC
controller with 10-bit resolution and up to 4MHz sample rate. The current
driver doesn't support all these features though (dma is not supported
right now for example). Could be that this will be added in future
releases. It would be good though, to have the driver located at the
"correct" place in the kernel tree right away.

We also have DAC and ADC drivers (up to 16 bits @ 64MS/s, via DMA), that would 
be nice to put in the "right" place  - I don't think that drivers/char is the 
right place, nor drivers/misc - I also don't think that /adc is a descriptive 
place for DAC or mixed signal front ends (MxFE).

What about /drivers/char/daq or just drivers/daq - drivers for 
non-PCI/USB/ISA/PCMCIA Data Acquisition Hardware, D/A and A/D converters, 
Analog Front ends, etc.

I think that is the common TLA - at least according to 
http://en.wikipedia.org/wiki/Data_acquisition

?

-Robin