Hello Stephen, . > > I think we should use parent device's node, not the paren node in DT, > > right? But I agree, we should only look "one level up in the chain". > Are these two things different? I'm suggesting looking at > device_node::parent and trying to find a #clock-cells property. I thought that MFD sub-devices may completely lack the DT node but I will verify this tomorrow. BTW, I already did the patch version 6 which checks the dev->parent->of_node if #clock-cells is not found from device's own node or if own node is NULL. Br. Matti Vaittinen