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    Subject[patch 39/60] i2c: Let users select algorithm drivers manually again
    2.6.26-stable review patch.  If anyone has any objections, please let us know.

    ------------------
    From: Jean Delvare <khali@linux-fr.org>

    Already in Linus' tree:
    http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=8d24f8dcb7ead491704e274883b2c627062f6235

    In kernel 2.6.26, the ability to select I2C algorithm drivers manually
    was removed, as all in-kernel drivers do that automatically. However
    there were some complaints that it was a problem for out-of-tree I2C
    bus drivers. In order to address these complaints, let's allow manual
    selection of these drivers again, but still hide them by default for
    better general user experience.

    This closes bug #11140:
    http://bugzilla.kernel.org/show_bug.cgi?id=11140

    Signed-off-by: Jean Delvare <khali@linux-fr.org>
    Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

    ---
    drivers/i2c/Kconfig | 14 ++++++++++++++
    drivers/i2c/algos/Kconfig | 11 ++++++++---
    2 files changed, 22 insertions(+), 3 deletions(-)

    --- a/drivers/i2c/algos/Kconfig
    +++ b/drivers/i2c/algos/Kconfig
    @@ -2,15 +2,20 @@
    # I2C algorithm drivers configuration
    #

    +menu "I2C Algorithms"
    + depends on !I2C_HELPER_AUTO
    +
    config I2C_ALGOBIT
    - tristate
    + tristate "I2C bit-banging interfaces"

    config I2C_ALGOPCF
    - tristate
    + tristate "I2C PCF 8584 interfaces"

    config I2C_ALGOPCA
    - tristate
    + tristate "I2C PCA 9564 interfaces"

    config I2C_ALGO_SGI
    tristate
    depends on SGI_IP22 || SGI_IP32 || X86_VISWS
    +
    +endmenu
    --- a/drivers/i2c/Kconfig
    +++ b/drivers/i2c/Kconfig
    @@ -38,6 +38,20 @@ config I2C_CHARDEV
    This support is also available as a module. If so, the module
    will be called i2c-dev.

    +config I2C_HELPER_AUTO
    + bool "Autoselect pertinent helper modules"
    + default y
    + help
    + Some I2C bus drivers require so-called "I2C algorithm" modules
    + to work. These are basically software-only abstractions of generic
    + I2C interfaces. This option will autoselect them so that you don't
    + have to care.
    +
    + Unselect this only if you need to enable additional helper
    + modules, for example for use with external I2C bus drivers.
    +
    + In doubt, say Y.
    +
    source drivers/i2c/algos/Kconfig
    source drivers/i2c/busses/Kconfig
    source drivers/i2c/chips/Kconfig
    --


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