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base: isa: Remove X86_32 dependency

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Many motherboards utilize a LPC to ISA bridge in order to decode
ISA-style port-mapped I/O addresses. This is particularly true for
embedded motherboards supporting the PC/104 bus (a bus specification
derived from ISA).

These motherboards are now commonly running 64-bit x86 processors. The
X86_32 dependency should be removed from the ISA bus configuration
option in order to support these newer motherboards.

A new config option, CONFIG_ISA_BUS, is introduced to allow for the
compilation of the ISA bus driver independent of the CONFIG_ISA option.
Devices which communicate via ISA-compatible buses can now be supported
independent of the dependencies of the CONFIG_ISA option.

Signed-off-by: William Breathitt Gray <vilhelm.gray@gmail.com>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
William Breathitt Gray 2016-01-22 11:28:07 -05:00 • committed by Greg Kroah-Hartman
parent ebdf4040c1
commit b3c1be1b78
3 changed files with 8 additions and 2 deletions
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2
include/linux/isa.h
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@ -22,7 +22,7 @@ struct isa_driver {
#define to_isa_driver(x) container_of((x), struct isa_driver, driver)
#ifdef CONFIG_ISA
#ifdef CONFIG_ISA_BUS
int isa_register_driver(struct isa_driver *, unsigned int);
void isa_unregister_driver(struct isa_driver *);
#else