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1# SPDX-License-Identifier: GPL-2.02%YAML 1.23---4$id: http://devicetree.org/schemas/clock/rockchip,rk3188-cru.yaml#5$schema: http://devicetree.org/meta-schemas/core.yaml#6 7title: Rockchip RK3188/RK3066 Clock and Reset Unit (CRU)8 9maintainers:10 - Elaine Zhang <zhangqing@rock-chips.com>11 - Heiko Stuebner <heiko@sntech.de>12 13description: |14 The RK3188/RK3066 clock controller generates and supplies clocks to various15 controllers within the SoC and also implements a reset controller for SoC16 peripherals.17 Each clock is assigned an identifier and client nodes can use this identifier18 to specify the clock which they consume. All available clocks are defined as19 preprocessor macros in the dt-bindings/clock/rk3188-cru.h and20 dt-bindings/clock/rk3066-cru.h headers and can be used in device tree sources.21 Similar macros exist for the reset sources in these files.22 There are several clocks that are generated outside the SoC. It is expected23 that they are defined using standard clock bindings with following24 clock-output-names:25 - "xin24m" - crystal input - required26 - "xin32k" - RTC clock - optional27 - "xin27m" - 27mhz crystal input on RK3066 - optional28 - "ext_hsadc" - external HSADC clock - optional29 - "ext_cif0" - external camera clock - optional30 - "ext_rmii" - external RMII clock - optional31 - "ext_jtag" - external JTAG clock - optional32 33properties:34 compatible:35 enum:36 - rockchip,rk3066a-cru37 - rockchip,rk3188-cru38 - rockchip,rk3188a-cru39 40 reg:41 maxItems: 142 43 "#clock-cells":44 const: 145 46 "#reset-cells":47 const: 148 49 clocks:50 maxItems: 151 52 clock-names:53 const: xin24m54 55 rockchip,grf:56 $ref: /schemas/types.yaml#/definitions/phandle57 description:58 Phandle to the syscon managing the "general register files" (GRF),59 if missing pll rates are not changeable, due to the missing pll60 lock status.61 62required:63 - compatible64 - reg65 - "#clock-cells"66 - "#reset-cells"67 68additionalProperties: false69 70examples:71 - |72 cru: clock-controller@20000000 {73 compatible = "rockchip,rk3188-cru";74 reg = <0x20000000 0x1000>;75 rockchip,grf = <&grf>;76 #clock-cells = <1>;77 #reset-cells = <1>;78 };79