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+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/net/ti,k3-am654-cpts.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: The TI AM654x/J721E Common Platform Time Sync (CPTS) module
+
+maintainers:
+ - Grygorii Strashko <grygorii.strashko@ti.com>
+ - Sekhar Nori <nsekhar@ti.com>
+
+description: |+
+ The TI AM654x/J721E CPTS module is used to facilitate host control of time
+ sync operations.
+ Main features of CPTS module are
+ - selection of multiple external clock sources
+ - Software control of time sync events via interrupt or polling
+ - 64-bit timestamp mode in ns with PPM and nudge adjustment.
+ - hardware timestamp push inputs (HWx_TS_PUSH)
+ - timestamp counter compare output (TS_COMP)
+ - timestamp counter bit output (TS_SYNC)
+ - periodic Generator function outputs (TS_GENFx)
+ - Ethernet Enhanced Scheduled Traffic Operations (CPTS_ESTFn) (TSN)
+ - external hardware timestamp push inputs (HWx_TS_PUSH) timestamping
+
+ Depending on integration it enables compliance with the IEEE 1588-2008
+ standard for a precision clock synchronization protocol, Ethernet Enhanced
+ Scheduled Traffic Operations (CPTS_ESTFn) and PCIe Subsystem Precision Time
+ Measurement (PTM).
+
+ TI AM654x/J721E SoCs has several similar CPTS modules integrated into the
+ different parts of the system which could be synchronized with each other
+ - Main CPTS
+ - MCU CPSW CPTS with IEEE 1588-2008 support
+ - PCIe subsystem CPTS for PTM support
+
+ Depending on CPTS module integration and when CPTS is integral part of
+ another module (MCU CPSW for example) "compatible" and "reg" can
+ be omitted - parent module is fully responsible for CPTS enabling and
+ configuration.
+
+properties:
+ $nodename:
+ pattern: "^cpts@[0-9a-f]+$"
+
+ compatible:
+ enum:
+ - ti,am65-cpts
+ - ti,j721e-cpts
+
+ reg:
+ maxItems: 1
+ description:
+ The physical base address and size of CPTS IO range
+
+ reg-names:
+ items:
+ - const: cpts
+
+ clocks:
+ maxItems: 1
+ description: CPTS reference clock
+
+ clock-names:
+ items:
+ - const: cpts
+
+ interrupts:
+ items:
+ - description: CPTS events interrupt
+
+ interrupt-names:
+ items:
+ - const: cpts
+
+ assigned-clock-parents: true
+
+ assigned-clocks: true
+
+ power-domains:
+ maxItems: 1
+
+ ti,cpts-ext-ts-inputs:
+ $ref: /schemas/types.yaml#/definitions/uint32
+ maximum: 8
+ description:
+ Number of hardware timestamp push inputs (HWx_TS_PUSH)
+
+ ti,cpts-periodic-outputs:
+ $ref: /schemas/types.yaml#/definitions/uint32
+ maximum: 8
+ description:
+ Number of timestamp Generator function outputs (TS_GENFx)
+
+ refclk-mux:
+ type: object
+ additionalProperties: false
+ description: CPTS reference clock multiplexer clock
+ properties:
+ '#clock-cells':
+ const: 0
+
+ clocks:
+ maxItems: 8
+
+ required:
+ - clocks
+
+required:
+ - compatible
+ - reg
+ - clocks
+ - clock-names
+ - interrupts
+ - interrupt-names
+
+additionalProperties: false
+
+examples:
+ - |
+ #include <dt-bindings/interrupt-controller/irq.h>
+ #include <dt-bindings/interrupt-controller/arm-gic.h>
+
+ cpts@310d0000 {
+ compatible = "ti,am65-cpts";
+ reg = <0x310d0000 0x400>;
+ reg-names = "cpts";
+ clocks = <&main_cpts_mux>;
+ clock-names = "cpts";
+ interrupts-extended = <&k3_irq 163 0 IRQ_TYPE_LEVEL_HIGH>;
+ interrupt-names = "cpts";
+ ti,cpts-periodic-outputs = <6>;
+ ti,cpts-ext-ts-inputs = <8>;
+
+ main_cpts_mux: refclk-mux {
+ #clock-cells = <0>;
+ clocks = <&k3_clks 118 5>, <&k3_clks 118 11>,
+ <&k3_clks 157 91>, <&k3_clks 157 77>,
+ <&k3_clks 157 102>, <&k3_clks 157 80>,
+ <&k3_clks 120 3>, <&k3_clks 121 3>;
+ assigned-clocks = <&main_cpts_mux>;
+ assigned-clock-parents = <&k3_clks 118 11>;
+ };
+ };