On Fri, 12 Sep 2014 10:36:07 -0700
"David E. Box" <david.e....@linux.intel.com> wrote:

> +#if IS_ENABLED(CONFIG_I2C_SHARED_CONTROLLER)
> +extern int i2c_acquire_ownership(struct device *dev);
> +extern int i2c_release_ownership(struct device *dev);
> +#endif

You can just have the prototypes anyway - no need for more ifdefs than
required


> +#if IS_ENABLED(CONFIG_I2C_SHARED_CONTROLLER)
> +int i2c_shared_controller_xfer(struct i2c_adapter *adap, struct i2c_msg 
> msgs[],
> +     int num)
> +{
> +     struct dw_i2c_dev *dev = i2c_get_adapdata(adap);
> +     int err;
> +
> +     if (dev->shared_host) {
> +             err = dev->acquire_ownership(dev->dev);
> +             if (!err) {
> +                     err = i2c_dw_xfer(adap, msgs, num);
> +                     dev->release_ownership(dev->dev);
> +             } else
> +                     dev_WARN(dev->dev, "couldnt acquire ownership\n");
> +
> +             return err;
> +     } else
> +             return i2c_dw_xfer(adap, msgs, num);
> +}
> +
> +static struct i2c_algorithm i2c_sc_algo = {
> +     .master_xfer    = i2c_shared_controller_xfer,
> +     .functionality  = i2c_dw_func,
> +};
> +#endif

I think this might be a lot cleaner if you put these pieces as functions
into i2c-designware-sem.c or a similar file and made the methods NULL
functions in the header in the case it's not supported ? Most of the
ifdeffery would then vanish into the extra file and keep the core code
cleaner ?


Alan
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majord...@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

Reply via email to