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1# SPDX-License-Identifier: (GPL-2.0+ OR MIT)2%YAML 1.23---4$id: http://devicetree.org/schemas/clock/rockchip,rk3228-cru.yaml#5$schema: http://devicetree.org/meta-schemas/core.yaml#6 7title: Rockchip RK3228 Clock and Reset Unit (CRU)8 9maintainers:10 - Elaine Zhang <zhangqing@rock-chips.com>11 - Heiko Stuebner <heiko@sntech.de>12 13description: |14 The RK3228 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/rk3228-cru.h headers and can be20 used in device tree sources. Similar macros exist for the reset sources in21 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 - "ext_i2s" - external I2S clock - optional27 - "ext_gmac" - external GMAC clock - optional28 - "ext_hsadc" - external HSADC clock - optional29 - "phy_50m_out" - output clock of the pll in the mac phy30 31properties:32 compatible:33 enum:34 - rockchip,rk3228-cru35 36 reg:37 maxItems: 138 39 "#clock-cells":40 const: 141 42 "#reset-cells":43 const: 144 45 clocks:46 maxItems: 147 48 clock-names:49 const: xin24m50 51 rockchip,grf:52 $ref: /schemas/types.yaml#/definitions/phandle53 description:54 Phandle to the syscon managing the "general register files" (GRF),55 if missing pll rates are not changeable, due to the missing pll56 lock status.57 58required:59 - compatible60 - reg61 - "#clock-cells"62 - "#reset-cells"63 64additionalProperties: false65 66examples:67 - |68 cru: clock-controller@20000000 {69 compatible = "rockchip,rk3228-cru";70 reg = <0x20000000 0x1000>;71 rockchip,grf = <&grf>;72 #clock-cells = <1>;73 #reset-cells = <1>;74 };75