rockchip,px30-cru.yaml (2918B)
1# SPDX-License-Identifier: GPL-2.0 2%YAML 1.2 3--- 4$id: http://devicetree.org/schemas/clock/rockchip,px30-cru.yaml# 5$schema: http://devicetree.org/meta-schemas/core.yaml# 6 7title: Rockchip PX30 Clock and Reset Unit (CRU) 8 9maintainers: 10 - Elaine Zhang <zhangqing@rock-chips.com> 11 - Heiko Stuebner <heiko@sntech.de> 12 13description: | 14 The PX30 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/px30-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 - "xin32k" - rtc clock - optional 27 - "i2sx_clkin" - external I2S clock - optional 28 - "gmac_clkin" - external GMAC clock - optional 29 30properties: 31 compatible: 32 enum: 33 - rockchip,px30-cru 34 - rockchip,px30-pmucru 35 36 reg: 37 maxItems: 1 38 39 "#clock-cells": 40 const: 1 41 42 "#reset-cells": 43 const: 1 44 45 clocks: 46 minItems: 1 47 items: 48 - description: Clock for both PMUCRU and CRU 49 - description: Clock for CRU (sourced from PMUCRU) 50 51 clock-names: 52 minItems: 1 53 items: 54 - const: xin24m 55 - const: gpll 56 57 rockchip,grf: 58 $ref: /schemas/types.yaml#/definitions/phandle 59 description: 60 Phandle to the syscon managing the "general register files" (GRF), 61 if missing pll rates are not changeable, due to the missing pll 62 lock status. 63 64required: 65 - compatible 66 - reg 67 - clocks 68 - clock-names 69 - "#clock-cells" 70 - "#reset-cells" 71 72allOf: 73 - if: 74 properties: 75 compatible: 76 contains: 77 const: rockchip,px30-cru 78 79 then: 80 properties: 81 clocks: 82 minItems: 2 83 84 clock-names: 85 minItems: 2 86 87 else: 88 properties: 89 clocks: 90 maxItems: 1 91 92 clock-names: 93 maxItems: 1 94 95additionalProperties: false 96 97examples: 98 - | 99 #include <dt-bindings/clock/px30-cru.h> 100 101 pmucru: clock-controller@ff2bc000 { 102 compatible = "rockchip,px30-pmucru"; 103 reg = <0xff2bc000 0x1000>; 104 clocks = <&xin24m>; 105 clock-names = "xin24m"; 106 rockchip,grf = <&grf>; 107 #clock-cells = <1>; 108 #reset-cells = <1>; 109 }; 110 111 cru: clock-controller@ff2b0000 { 112 compatible = "rockchip,px30-cru"; 113 reg = <0xff2b0000 0x1000>; 114 clocks = <&xin24m>, <&pmucru PLL_GPLL>; 115 clock-names = "xin24m", "gpll"; 116 rockchip,grf = <&grf>; 117 #clock-cells = <1>; 118 #reset-cells = <1>; 119 };