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@xxxxxxxxxxxxxxx> > Signed-off-by: Serge Semin <Sergey.Semin@xxxxxxxxxxxxxxxxxxxx> > Tested-by: Jarkko Nikula <jarkko.nikula@xxxxxxxxxxxxxxx> > Acked-by: Jarkko Nikula <jarkko.nikula@xxxxxxxxxxxxxxx> > Cc: Alexey Malahov <Alexey.Malahov@xxxxxxxxxxxxxxxxxxxx> > Cc: Thomas Bogendoerfer <tsbogend@xxxxxxxxxxxxxxxx> > Cc: Rob Herring <robh+dt@xxxxxxxxxx> > Cc: devicetree@xxxxxxxxxxxxxxx > Cc: linux-mips@xxxxxxxxxxxxxxx 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
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