keba_i2c_auxdev
struct keba_i2c_auxdev *auxdev;
ki2c->auxdev = container_of(auxdev, struct keba_i2c_auxdev, auxdev);
struct keba_i2c_auxdev *i2c;
struct keba_i2c_auxdev *i2c =
container_of(dev, struct keba_i2c_auxdev, auxdev.dev);