Hi, could you explicitly state in the probe function (or just in the driver in general, as there's not much more?) and the config structs that the target SoC is X55? A few more SoCs (MDM9607, MSM8x26 and some others) also use what's known as "A7PLL" downstream, but all of them have a separate configuration for their specific PLLs, which aren't compatible with each other. Konrad