On Wednesday, May 23, 2012 9:49 AM, Ian Abbott wrote:
> On 2012-05-23 17:28, H Hartley Sweeten wrote:
>> Side-note on the boardinfo stuff.
>>
>> I wonder if it makes sense to create a common boardinfo struct
>> and modify the comedi_driver struct a bit. Something like:
>>
>> struct comedi_boardinfo {
>> const char *name;
>> unsigned short vendor;
>> unsigned short device;
>> void *private;
>> };
>>
>> struct comedi_driver {
>> struct comedi_driver *next;
>>
>> const char *driver_name;
>> struct module *module;
>> int (*attach) (struct comedi_device *, struct comedi_devconfig *);
>> void (*detach) (struct comedi_device *);
>> int (*attach_pci) (struct comedi_device *, struct pci_dev *);
>> int (*attach_usb) (struct comedi_device *, struct usb_interface *);
>>
>> u32 num_boards;
>> struct comedi_boardinfo *board;
>> };
>>
>> This would allow comedi_recognize() to walk the boardinfo
>> to find the match without all the ugly casts. It should also
>> allow creating a common comedi_find_pcidev() for all the
>> comedi pci drivers to use when probing for the board_ptr.
>>
>> This would create a bit of churn but I think it would be a
>> lot cleaner in the end.
>>
>> What do you think?
>
> Please don't do this yet. We might want to implement auto configuration
> for device types that have no concept of vendor ID or product ID, such
> as PCMCIA, platform devices, SPI devices etc., either by adding extra
> attach_xxx hooks to struct comedi_driver for the more common bus types,
> or a more generic attach_generic hook for the less common bus types.
>
> Also, it would waste space in the ISA-only drivers.
OK. I'll hold off on doing anything like this.
But, I think we would actually save space in all the drivers. I just need
to think about it a bit more.
Regards,
Hartley
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