staging: comedi: add generic auto-config functions

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Add (and export) generic auto-config function `comedi_auto_config()` to
allow hardware devices on arbitrary bus types (e.g. platform devices,
spi devices, etc.) to be auto-configured as comedi devices.  This uses a
new `auto_attach()` hook in the `struct comedi_driver`.  This new hook
will eventually replace the bus-specific `attach_pci()` and
`attach_usb()` hooks in the low-level comedi drivers.

When the `auto_attach()` hook is called in the low-level driver, the
`hw_dev` member of the `struct comedi_device` will have already been set
to the hardware device passed to `comedi_auto_config()`.  The low-level
driver can convert this to some bus-device wrapper structure pointer,
possibly with the help of the `context` parameter that is passed
unchanged from the `comedi_auto_config()` call.

Also export the existing `comedi_auto_unconfig()` function as the
matching call to `comedi_auto_config()`.

Signed-off-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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Ian Abbott 2012-10-27 21:44:14 +01:00 • committed by Greg Kroah-Hartman

parent 156096a039

commit 8ed705aff0

2 changed files with 26 additions and 1 deletions

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4

drivers/staging/comedi/comedidev.h

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23

drivers/staging/comedi/drivers.c

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