From 5d1646d90e1f2cceb9f0828f4b28318cd0ec7744 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sat, 27 Apr 2024 12:05:51 +0200 Subject: Adding upstream version 5.10.209. Signed-off-by: Daniel Baumann --- .../bindings/clock/amlogic,gxbb-clkc.txt | 53 ++++++++++++++++++++++ 1 file changed, 53 insertions(+) create mode 100644 Documentation/devicetree/bindings/clock/amlogic,gxbb-clkc.txt (limited to 'Documentation/devicetree/bindings/clock/amlogic,gxbb-clkc.txt') diff --git a/Documentation/devicetree/bindings/clock/amlogic,gxbb-clkc.txt b/Documentation/devicetree/bindings/clock/amlogic,gxbb-clkc.txt new file mode 100644 index 000000000..7ccecd5c0 --- /dev/null +++ b/Documentation/devicetree/bindings/clock/amlogic,gxbb-clkc.txt @@ -0,0 +1,53 @@ +* Amlogic GXBB Clock and Reset Unit + +The Amlogic GXBB clock controller generates and supplies clock to various +controllers within the SoC. + +Required Properties: + +- compatible: should be: + "amlogic,gxbb-clkc" for GXBB SoC, + "amlogic,gxl-clkc" for GXL and GXM SoC, + "amlogic,axg-clkc" for AXG SoC. + "amlogic,g12a-clkc" for G12A SoC. + "amlogic,g12b-clkc" for G12B SoC. + "amlogic,sm1-clkc" for SM1 SoC. +- clocks : list of clock phandle, one for each entry clock-names. +- clock-names : should contain the following: + * "xtal": the platform xtal + +- #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-clkc.h header and can be +used in device tree sources. + +Parent node should have the following properties : +- compatible: "syscon", "simple-mfd, and "amlogic,meson-gx-hhi-sysctrl" or + "amlogic,meson-axg-hhi-sysctrl" +- reg: base address and size of the HHI system control register space. + +Example: Clock controller node: + +sysctrl: system-controller@0 { + compatible = "amlogic,meson-gx-hhi-sysctrl", "syscon", "simple-mfd"; + reg = <0 0 0 0x400>; + + clkc: clock-controller { + #clock-cells = <1>; + compatible = "amlogic,gxbb-clkc"; + clocks = <&xtal>; + clock-names = "xtal"; + }; +}; + +Example: UART controller node that consumes the clock generated by the clock + controller: + + uart_AO: serial@c81004c0 { + compatible = "amlogic,meson-uart"; + reg = <0xc81004c0 0x14>; + interrupts = <0 90 1>; + clocks = <&clkc CLKID_CLK81>; + }; -- cgit v1.2.3