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+# SPDX-License-Identifier: GPL-2.0
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/clock/rockchip,px30-cru.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Rockchip PX30 Clock and Reset Unit (CRU)
+
+maintainers:
+ - Elaine Zhang <zhangqing@rock-chips.com>
+ - Heiko Stuebner <heiko@sntech.de>
+
+description: |
+ The PX30 clock controller generates and supplies clocks to various
+ controllers within the SoC and also implements a reset controller for SoC
+ peripherals.
+ 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/px30-cru.h headers and can be
+ used in device tree sources. Similar macros exist for the reset sources in
+ these files.
+ There are several clocks that are generated outside the SoC. It is expected
+ that they are defined using standard clock bindings with following
+ clock-output-names:
+ - "xin24m" - crystal input - required
+ - "xin32k" - rtc clock - optional
+ - "i2sx_clkin" - external I2S clock - optional
+ - "gmac_clkin" - external GMAC clock - optional
+
+properties:
+ compatible:
+ enum:
+ - rockchip,px30-cru
+ - rockchip,px30-pmucru
+
+ reg:
+ maxItems: 1
+
+ "#clock-cells":
+ const: 1
+
+ "#reset-cells":
+ const: 1
+
+ clocks:
+ minItems: 1
+ items:
+ - description: Clock for both PMUCRU and CRU
+ - description: Clock for CRU (sourced from PMUCRU)
+
+ clock-names:
+ minItems: 1
+ items:
+ - const: xin24m
+ - const: gpll
+
+ rockchip,grf:
+ $ref: /schemas/types.yaml#/definitions/phandle
+ description:
+ Phandle to the syscon managing the "general register files" (GRF),
+ if missing pll rates are not changeable, due to the missing pll
+ lock status.
+
+required:
+ - compatible
+ - reg
+ - clocks
+ - clock-names
+ - "#clock-cells"
+ - "#reset-cells"
+
+allOf:
+ - if:
+ properties:
+ compatible:
+ contains:
+ const: rockchip,px30-cru
+
+ then:
+ properties:
+ clocks:
+ minItems: 2
+
+ clock-names:
+ minItems: 2
+
+ else:
+ properties:
+ clocks:
+ maxItems: 1
+
+ clock-names:
+ maxItems: 1
+
+additionalProperties: false
+
+examples:
+ - |
+ #include <dt-bindings/clock/px30-cru.h>
+
+ pmucru: clock-controller@ff2bc000 {
+ compatible = "rockchip,px30-pmucru";
+ reg = <0xff2bc000 0x1000>;
+ clocks = <&xin24m>;
+ clock-names = "xin24m";
+ rockchip,grf = <&grf>;
+ #clock-cells = <1>;
+ #reset-cells = <1>;
+ };
+
+ cru: clock-controller@ff2b0000 {
+ compatible = "rockchip,px30-cru";
+ reg = <0xff2b0000 0x1000>;
+ clocks = <&xin24m>, <&pmucru PLL_GPLL>;
+ clock-names = "xin24m", "gpll";
+ rockchip,grf = <&grf>;
+ #clock-cells = <1>;
+ #reset-cells = <1>;
+ };