Hi,

+static const struct rk3x_i2c_soc_data rv1108_soc_data = {
+	.grf_offset = -1,
+	.calc_timings = rk3x_i2c_v1_calc_timings,
+};
+

I don't care super much, but why don't you reuse rk3399_soc_data()?
Or even use the rk3399 compatible as fallback value?

Kind regards,

   Wolfram