56 lines
1.8 KiB
Plaintext
Executable file
56 lines
1.8 KiB
Plaintext
Executable file
* 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: value should be different for each SoC family as :
|
|
- GXBB (S905) : "amlogic,meson-gxbb-aoclkc"
|
|
- GXL (S905X, S905D) : "amlogic,meson-gxl-aoclkc"
|
|
- GXM (S912) : "amlogic,meson-gxm-aoclkc"
|
|
- AXG (A113D, A113X) : "amlogic,meson-axg-aoclkc"
|
|
followed by the common "amlogic,meson-gx-aoclkc"
|
|
|
|
- #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.
|
|
|
|
Parent node should have the following properties :
|
|
- compatible: "amlogic,meson-gx-ao-sysctrl", "syscon", "simple-mfd"
|
|
- reg: base address and size of the AO system control register space.
|
|
|
|
Example: AO Clock controller node:
|
|
|
|
ao_sysctrl: sys-ctrl@0 {
|
|
compatible = "amlogic,meson-gx-ao-sysctrl", "syscon", "simple-mfd";
|
|
reg = <0x0 0x0 0x0 0x100>;
|
|
|
|
clkc_AO: clock-controller {
|
|
compatible = "amlogic,meson-gxbb-aoclkc", "amlogic,meson-gx-aoclkc";
|
|
#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>;
|
|
};
|