| * Amlogic GXBB AO Clock and Reset Unit |
| |
| The Amlogic GXBB AO clock controller generates and supplies clock to various |
| controllers within the Always-On part of the SoC. |
| |
| Required Properties: |
| |
| - compatible: should be "amlogic,gxbb-aoclkc" |
| - reg: physical base address of the clock controller and length of memory |
| mapped region. |
| |
| - #clock-cells: should be 1. |
| |
| Each clock is assigned an identifier and client nodes can use this identifier |
| to specify the clock which they consume. All available clocks are defined as |
| preprocessor macros in the dt-bindings/clock/gxbb-aoclkc.h header and can be |
| used in device tree sources. |
| |
| - #reset-cells: should be 1. |
| |
| Each reset is assigned an identifier and client nodes can use this identifier |
| to specify the reset which they consume. All available resets are defined as |
| preprocessor macros in the dt-bindings/reset/gxbb-aoclkc.h header and can be |
| used in device tree sources. |
| |
| Example: AO Clock controller node: |
| |
| clkc_AO: clock-controller@040 { |
| compatible = "amlogic,gxbb-aoclkc"; |
| reg = <0x0 0x040 0x0 0x4>; |
| #clock-cells = <1>; |
| #reset-cells = <1>; |
| }; |
| |
| Example: UART controller node that consumes the clock and reset generated |
| by the clock controller: |
| |
| uart_AO: serial@4c0 { |
| compatible = "amlogic,meson-uart"; |
| reg = <0x4c0 0x14>; |
| interrupts = <0 90 1>; |
| clocks = <&clkc_AO CLKID_AO_UART1>; |
| resets = <&clkc_AO RESET_AO_UART1>; |
| status = "disabled"; |
| }; |