linux-stable/drivers/parport
Maciej W. Rozycki 66bcd06099 parport_pc: Also enable driver for PCI systems
Nowadays PC-style parallel ports come in the form of PCI and PCIe option
cards and there are some combined parallel/serial option cards as well
that we handle in the parport subsystem.  There is nothing in particular
that would prevent them from being used in any system equipped with PCI
or PCIe connectivity, except that we do not permit the PARPORT_PC config
option to be selected for platforms for which ARCH_MIGHT_HAVE_PC_PARPORT
has not been set for.

The only PCI platforms that actually can't make use of PC-style parallel
port hardware are those newer PCIe systems that have no support for I/O
cycles in the host bridge, required by such parallel ports.  Notably,
this includes the s390 arch, which has port I/O accessors that cause
compilation warnings (promoted to errors with `-Werror'), and there are
other cases such as the POWER9 PHB4 device, though this one has variable
port I/O accessors that depend on the particular system.  Also it is not
clear whether the serial port side of devices enabled by PARPORT_SERIAL
uses port I/O or MMIO.  Finally Super I/O solutions are always either
ISA or platform devices.

Make the PARPORT_PC option selectable also for PCI systems then, except
for the s390 arch, however limit the availability of PARPORT_PC_SUPERIO
to platforms that enable ARCH_MIGHT_HAVE_PC_PARPORT.  Update platforms
accordingly for the required <asm/parport.h> header.

Acked-by: Sudip Mukherjee <sudipm.mukherjee@gmail.com>
Signed-off-by: Maciej W. Rozycki <macro@orcam.me.uk>
Link: https://lore.kernel.org/r/alpine.DEB.2.21.2202141955550.34636@angie.orcam.me.uk
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2022-03-18 14:01:41 +01:00
..
BUGS-parport
daisy.c parport: daisy: Convert DPRINTK to pr_debug 2020-04-23 17:05:38 +02:00
ieee1284.c treewide: Use fallthrough pseudo-keyword 2020-08-23 17:36:59 -05:00
ieee1284_ops.c parport: remove non-zero check on count 2021-08-27 16:18:42 +02:00
Kconfig parport_pc: Also enable driver for PCI systems 2022-03-18 14:01:41 +01:00
Makefile parport: Add missing newline at end of file 2019-08-05 17:56:45 +02:00
multiface.h
parport_amiga.c module: remove never implemented MODULE_SUPPORTED_DEVICE 2021-03-17 13:16:18 -07:00
parport_atari.c module: remove never implemented MODULE_SUPPORTED_DEVICE 2021-03-17 13:16:18 -07:00
parport_ax88796.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
parport_cs.c parport: Convert printk(KERN_<LEVEL> to pr_<level>( 2020-04-23 17:05:37 +02:00
parport_gsc.c parisc/parport_gsc: switch from 'pci_' to 'dma_' API 2021-08-30 10:18:25 +02:00
parport_gsc.h parport: Use more comon logging styles 2020-04-23 17:05:37 +02:00
parport_ip32.c treewide: remove editor modelines and cruft 2021-05-07 00:26:34 -07:00
parport_mfc3.c module: remove never implemented MODULE_SUPPORTED_DEVICE 2021-03-17 13:16:18 -07:00
parport_pc.c treewide: Use fallthrough pseudo-keyword 2020-08-23 17:36:59 -05:00
parport_serial.c parport: serial: Retrieve IRQ vector with help of special getter 2021-07-29 17:08:40 +02:00
parport_sunbpp.c module: remove never implemented MODULE_SUPPORTED_DEVICE 2021-03-17 13:16:18 -07:00
probe.c parport: Use string_upper() instead of open coded variant 2021-05-21 14:48:58 +02:00
procfs.c Char/Misc driver patches for 5.8-rc1 2020-06-07 10:59:32 -07:00
share.c parport: fix a kernel-doc markup 2021-01-21 14:06:00 -07:00
TODO-parport