On Monday 20 October 2014 13:54:03 Kevin Cernekee wrote: > +- clock-names: The appropriate output name in the referenced clock node. > + > + uart0: serial@14e00520 { > + compatible = "brcm,bcm6345-uart"; > + reg = <0x14e00520 0x18>; > + interrupt-parent = <&periph_intc>; > + interrupts = <2>; > + clocks = <&periph_clk>; > + clock-names = "periph"; > + }; > + > + clocks { > + periph_clk: periph_clk@0 { > + compatible = "fixed-clock"; > + #clock-cells = <0>; > + clock-frequency = <54000000>; > + clock-output-names = "periph"; > + }; > + }; In this example, the clock output name of the clock provider is the same as the clock input of the consumer, that is almost always a bug and would not be a good example at all. I assume the output name is correct and the input is not. If you have access to the HDL source of the bcm6345-uart, please check if the input has a proper name, otherwise just call it "uart" or remove the clock-names property completely. In the documentation enough, you must document the specific name of the clock that is supposed to be used by the uart driver. Arnd