From: William Breathitt Gray <vilhelm.gray@gmail.com>
To: gregkh@linuxfoundation.org, akpm@linux-foundation.org
Cc: x86@kernel.org, linux-next@vger.kernel.org,
linux-gpio@vger.kernel.org, linux-iio@vger.kernel.org,
linux-kernel@vger.kernel.org, linux-watchdog@vger.kernel.org,
sfr@canb.auug.org.au, linux@roeck-us.net,
William Breathitt Gray <vilhelm.gray@gmail.com>
Subject: [PATCH v5 0/4] Allow ISA-style drivers on modern systems
Date: Fri, 27 May 2016 18:08:15 -0400 [thread overview]
Message-ID: <cover.1464380034.git.vilhelm.gray@gmail.com> (raw)
Changes in v5:
- Add explicit X86 dependency to CONFIG_STX104 and CONFIG_EBC_C384_WDT
since these drivers were developed with X86 architectures in mind
Changes in v4:
- Remove unnecessary explicit "default n" from the X86 ISA_BUS Kconfig
option since Kconfig options are disabled by default
Changes in v3:
- Remove redundant X86 dependency from the X86 ISA_BUS Kconfig option
Changes in v2:
- Adjusted preprocessor compilation conditional in include/linux/isa.h
to use CONFIG_ISA_BUS_API in order to link the correct ISA bus
driver function definitions when available
- Move ISA_BUS_API Kconfig option to arch/Kconfig, thus making it
available to all architectures instead of just X86
- X86 ISA_BUS Kconfig option should be disabled by default; ISA
devices typically do not have a way to be probed, so users should
be required to explicitly enable ISA bus driver support, lest a
selected driver be loaded with the misguided expectation of a safe
hardware probe
Several modern devices, such as PC/104 cards, are expected to run on
modern systems via an ISA bus interface. Since ISA is a legacy interface
for most modern architectures, ISA support should remain disabled in
general. Support for ISA-style drivers should be enabled on a per driver
basis.
To allow ISA-style drivers on modern systems, this patchset introduces
the ISA_BUS_API and ISA_BUS Kconfig options. The ISA bus driver will now
build conditionally on the ISA_BUS_API Kconfig option, which defaults to
the legacy ISA Kconfig option. The ISA_BUS Kconfig option allows the
ISA_BUS_API Kconfig option to be selected on architectures which do not
enable ISA (e.g. X86_64).
The ISA_BUS Kconfig option is currently only implemented for X86
architectures. Other architectures may have their own ISA_BUS Kconfig
option added as required.
An earlier attempt to allow the ISA bus driver to build for X86_64 took
an inappropriate approach resulting in legacy ISA drivers becoming
enabled unconditionally on untested and unsupported architectures.
Commit 51e68d055cba ("x86 isa: add back X86_32 dependency on
CONFIG_ISA"), added to restrict the ISA bus driver to only X86_32,
causes several drivers intended for X86_64 to be restricted to X86_32 as
well.
This patchset replaces the ISA Kconfig option dependency of several
drivers to ISA_BUS_API, so that they may build for X86_64 as intended.
The respective drivers are as follows:
* ACCES 104-IDIO-16 GPIO driver
* ACCES 104-IDI-48 GPIO driver
* ACCES 104-DIO-48E GPIO driver
* Apex Embedded Systems STX104 DAC driver
* WinSystems EBC-C384 watchdog timer driver
* WinSystems WS16C48 GPIO driver
William Breathitt Gray (4):
isa: Allow ISA-style drivers on modern systems
gpio: Allow PC/104 devices on X86_64
iio: stx104: Allow build for X86_64
watchdog: ebc-c384_wdt: Allow build for X86_64
arch/Kconfig | 3 +++
arch/x86/Kconfig | 9 +++++++++
drivers/base/Makefile | 2 +-
drivers/gpio/Kconfig | 8 ++++----
drivers/iio/dac/Kconfig | 2 +-
drivers/watchdog/Kconfig | 2 +-
include/linux/isa.h | 2 +-
7 files changed, 20 insertions(+), 8 deletions(-)
--
2.7.3
next reply other threads:[~2016-05-27 22:08 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-05-27 22:08 William Breathitt Gray [this message]
2016-05-27 22:08 ` [PATCH v5 1/4] isa: Allow ISA-style drivers on modern systems William Breathitt Gray
2016-05-28 19:35 ` Linus Torvalds
2016-05-27 22:08 ` [PATCH v5 2/4] gpio: Allow PC/104 devices on X86_64 William Breathitt Gray
[not found] ` <61880bededb77bbc3ea3422e48ce717d2a2ff489.1464380034.git.vilhelm.gray-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2016-05-31 8:41 ` Linus Walleij
2016-05-31 11:23 ` William Breathitt Gray
2016-05-31 15:25 ` Greg KH
2016-06-17 10:47 ` Thorsten Leemhuis
[not found] ` <057d8c0b-074c-609a-35da-5a01f07b6d31-rCxcAJFjeRkk+I/owrrOrA@public.gmane.org>
2016-06-18 2:36 ` Greg KH
2016-06-18 2:49 ` William Breathitt Gray
2016-06-18 3:18 ` Greg KH
2016-06-18 3:39 ` William Breathitt Gray
2016-06-18 3:47 ` Greg KH
[not found] ` <cover.1464380034.git.vilhelm.gray-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2016-05-27 22:09 ` [PATCH v5 3/4] iio: stx104: Allow build for X86_64 William Breathitt Gray
2016-05-28 17:15 ` Jonathan Cameron
2016-05-27 22:09 ` [PATCH v5 4/4] watchdog: ebc-c384_wdt: " William Breathitt Gray
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