• Michael Buesch's avatar
    gpiolib: allow user-selection · 7444a72e
    Michael Buesch authored
    This patch adds functionality to the gpio-lib subsystem to make it
    possible to enable the gpio-lib code even if the architecture code didn't
    request to get it built in.
    The archtitecture code does still need to implement the gpiolib accessor
    functions in its asm/gpio.h file.  This patch adds the implementations for
    x86 and PPC.
    With these changes it is possible to run generic GPIO expansion cards on
    every architecture that implements the trivial wrapper functions.  Support
    for more architectures can easily be added.
    Signed-off-by: default avatarMichael Buesch <mb@bu3sch.de>
    Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
    Cc: Stephen Rothwell <sfr@canb.auug.org.au>
    Cc: David Brownell <david-b@pacbell.net>
    Cc: Russell King <rmk@arm.linux.org.uk>
    Cc: Haavard Skinnemoen <hskinnemoen@atmel.com>
    Cc: Jesper Nilsson <jesper.nilsson@axis.com>
    Cc: Ralf Baechle <ralf@linux-mips.org>
    Cc: Paul Mackerras <paulus@samba.org>
    Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
    Cc: Ingo Molnar <mingo@elte.hu>
    Cc: Thomas Gleixner <tglx@linutronix.de>
    Cc: Jean Delvare <khali@linux-fr.org>
    Cc: Samuel Ortiz <sameo@openedhand.com>
    Cc: Kumar Gala <galak@gate.crashing.org>
    Cc: Sam Ravnborg <sam@ravnborg.org>
    Cc: Adrian Bunk <bunk@stusta.de>
    Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
    Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
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