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author | Ian Abbott <abbotti@mev.co.uk> | 2023-09-13 20:07:04 +0300 |
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committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2023-10-05 14:34:04 +0300 |
commit | 0ccb86a690c52d047b6cafa0f7f99805bf6eeb4e (patch) | |
tree | 4a98281813a583d13e38cb2c5b3e0a9dcd4b5e79 /include/linux/comedi/comedi_8255.h | |
parent | 90d256757e0bffd7a9beafd7c2bdc40a0236f9ec (diff) | |
download | linux-0ccb86a690c52d047b6cafa0f7f99805bf6eeb4e.tar.xz |
comedi: 8255_pci: Conditionally remove devices that use port I/O
In a future patch, the port I/O functions (`inb()`, `outb()`, and
friends will only be declared in the `HAS_IOPORT` configuration option
is enabled.
The 8255_pci module supports PCI digital I/O devices from various
manufacturers that consist of one or more 8255 Programmable Peripheral
Interface chips (or equivalent hardware) to provide their digital I/O
ports. Some of the devices use port I/O and some only use memory-mapped
I/O.
Conditionally compile in support for the devices that need port I/O if
and only if the `CONFIG_HAS_IOPORT` macro is defined. Change
`pci_8255_auto_attach()` to return an error if the device actually
requires port I/O (based on the PCI BAR resource flags) but the
`HAS_IOPORT` configuration is not enabled.
Cc: Arnd Bergmann <arnd@kernel.org>
Cc: Niklas Schnelle <schnelle@linux.ibm.com>
Signed-off-by: Ian Abbott <abbotti@mev.co.uk>
Link: https://lore.kernel.org/r/20230913170712.111719-6-abbotti@mev.co.uk
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'include/linux/comedi/comedi_8255.h')
0 files changed, 0 insertions, 0 deletions