1* Amlogic Meson8, Meson8b and Meson8m2 Clock and Reset Unit 2 3The Amlogic Meson8 / Meson8b / Meson8m2 clock controller generates and 4supplies clock to various controllers within the SoC. 5 6Required Properties: 7 8- compatible: must be one of: 9 - "amlogic,meson8-clkc" for Meson8 (S802) SoCs 10 - "amlogic,meson8b-clkc" for Meson8 (S805) SoCs 11 - "amlogic,meson8m2-clkc" for Meson8m2 (S812) SoCs 12- #clock-cells: should be 1. 13- #reset-cells: should be 1. 14 15Parent node should have the following properties : 16- compatible: "amlogic,meson-hhi-sysctrl", "simple-mfd", "syscon" 17- reg: base address and size of the HHI system control register space. 18 19Each clock is assigned an identifier and client nodes can use this identifier 20to specify the clock which they consume. All available clocks are defined as 21preprocessor macros in the dt-bindings/clock/meson8b-clkc.h header and can be 22used in device tree sources. 23 24Similarly a preprocessor macro for each reset line is defined in 25dt-bindings/reset/amlogic,meson8b-clkc-reset.h (which can be used from the 26device tree sources). 27 28 29Example: Clock controller node: 30 31 clkc: clock-controller { 32 compatible = "amlogic,meson8b-clkc"; 33 #clock-cells = <1>; 34 #reset-cells = <1>; 35 }; 36 37 38Example: UART controller node that consumes the clock generated by the clock 39 controller: 40 41 uart_AO: serial@c81004c0 { 42 compatible = "amlogic,meson-uart"; 43 reg = <0xc81004c0 0x14>; 44 interrupts = <0 90 1>; 45 clocks = <&clkc CLKID_CLK81>; 46 }; 47