comedi: pcl730: Add sanity checks for I/O base address

The "pcl730" driver uses an admin-supplied configuration option
(`it->options[0]`) to configure the I/O port base address of various
relay output and digital input ISA board from Advantech, ADLINK, ICP
DAS, and Diamond Systems.  It currently allows any base address to be
configured but the hardware devices have restrictions on the base
addresses (configured by on-board DIP switches or jumpers), including
the alignment, which can be larger than the board's I/O register address
span.  The Diamond Systems IR104-PBF board is particularly restricted to
4 different base addresses with different sized gaps between the
possible addresses.

Store the minimum supported I/O base addresses and alignment in the
static board information array elements and add a sanity check to ensure
the device is not configured at an unsupported base address.  For the
IR104-PBF board, add a special check that the base address is one of the
4 supported base addresses for that board.

Signed-off-by: Ian Abbott <abbotti@mev.co.uk>
Link: https://patch.msgid.link/20260130170416.49994-36-abbotti@mev.co.uk
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

0 files changed, 0 insertions, 0 deletions