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    SubjectRe: [PATCH v6 08/11] i2c: designware: Convert driver to using regmap API
    On Thu, May 28, 2020 at 12:33:18PM +0300, Serge Semin wrote:
    > Seeing the DW I2C driver is using flags-based accessors with two
    > conditional clauses it would be better to replace them with the regmap
    > API IO methods and to initialize the regmap object with read/write
    > callbacks specific to the controller registers map implementation. This
    > will be also handy for the drivers with non-standard registers mapping
    > (like an embedded into the Baikal-T1 System Controller DW I2C block, which
    > glue-driver is a part of this series).
    >
    > As before the driver tries to detect the mapping setup at probe stage and
    > creates a regmap object accordingly, which will be used by the rest of the
    > code to correctly access the controller registers. In two places it was
    > appropriate to convert the hand-written read-modify-write and
    > read-poll-loop design patterns to the corresponding regmap API
    > ready-to-use methods.
    >
    > Note the regmap IO methods return value is checked only at the probe
    > stage. The rest of the code won't do this because basically we have
    > MMIO-based regmap so non of the read/write methods can fail (this also
    > won't be needed for the Baikal-T1-specific I2C controller).
    >
    > Suggested-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
    > Signed-off-by: Serge Semin <Sergey.Semin@baikalelectronics.ru>
    > Tested-by: Jarkko Nikula <jarkko.nikula@linux.intel.com>
    > Acked-by: Jarkko Nikula <jarkko.nikula@linux.intel.com>
    > Cc: Alexey Malahov <Alexey.Malahov@baikalelectronics.ru>
    > Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
    > Cc: Rob Herring <robh+dt@kernel.org>
    > Cc: devicetree@vger.kernel.org
    > Cc: linux-mips@vger.kernel.org

    My codecheckers found these, rightfully I'd say:

    SPARSE
    drivers/i2c/busses/i2c-designware-master.c:427:53: warning: incorrect type in argument 3 (different signedness)
    drivers/i2c/busses/i2c-designware-master.c:427:53: expected unsigned int *val
    drivers/i2c/busses/i2c-designware-master.c:427:53: got int *

    CC
    drivers/i2c/busses/i2c-designware-common.c:127: warning: Excess function parameter 'base' description in 'i2c_dw_init_regmap'

    ^ means there is an argument documented which does not exist in the
    function declaration

    [unhandled content-type:application/pgp-signature]
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