1# SPDX-License-Identifier: (GPL-2.0+ OR MIT) 2%YAML 1.2 3--- 4$id: http://devicetree.org/schemas/clock/rockchip,rk3036-cru.yaml# 5$schema: http://devicetree.org/meta-schemas/core.yaml# 6 7title: Rockchip RK3036 Clock and Reset Unit (CRU) 8 9maintainers: 10 - Elaine Zhang <zhangqing@rock-chips.com> 11 - Heiko Stuebner <heiko@sntech.de> 12 13description: | 14 The RK3036 clock controller generates and supplies clocks to various 15 controllers within the SoC and also implements a reset controller for SoC 16 peripherals. 17 Each clock is assigned an identifier and client nodes can use this identifier 18 to specify the clock which they consume. All available clocks are defined as 19 preprocessor macros in the dt-bindings/clock/rk3036-cru.h headers and can be 20 used in device tree sources. Similar macros exist for the reset sources in 21 these files. 22 There are several clocks that are generated outside the SoC. It is expected 23 that they are defined using standard clock bindings with following 24 clock-output-names: 25 - "xin24m" - crystal input - required 26 - "ext_i2s" - external I2S clock - optional 27 - "rmii_clkin" - external EMAC clock - optional 28 29properties: 30 compatible: 31 enum: 32 - rockchip,rk3036-cru 33 34 reg: 35 maxItems: 1 36 37 "#clock-cells": 38 const: 1 39 40 "#reset-cells": 41 const: 1 42 43 clocks: 44 maxItems: 1 45 46 clock-names: 47 const: xin24m 48 49 rockchip,grf: 50 $ref: /schemas/types.yaml#/definitions/phandle 51 description: 52 Phandle to the syscon managing the "general register files" (GRF), 53 if missing pll rates are not changeable, due to the missing pll 54 lock status. 55 56required: 57 - compatible 58 - reg 59 - "#clock-cells" 60 - "#reset-cells" 61 62additionalProperties: false 63 64examples: 65 - | 66 cru: clock-controller@20000000 { 67 compatible = "rockchip,rk3036-cru"; 68 reg = <0x20000000 0x1000>; 69 rockchip,grf = <&grf>; 70 #clock-cells = <1>; 71 #reset-cells = <1>; 72 }; 73