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And also supports time synchronization as required for IEEE 1588 and IEEE 802.1AS-2020. So add device tree binding doc for the PTP clock based on NETC Timer. Signed-off-by: Wei Fang --- v2 changes: 1. Refine the subject and the commit message 2. Remove "nxp,pps-channel" 3. Add description to "clocks" and "clock-names" --- .../devicetree/bindings/ptp/nxp,ptp-netc.yaml | 67 +++++++++++++++++++ 1 file changed, 67 insertions(+) create mode 100644 Documentation/devicetree/bindings/ptp/nxp,ptp-netc.yaml diff --git a/Documentation/devicetree/bindings/ptp/nxp,ptp-netc.yaml b/Documentation/devicetree/bindings/ptp/nxp,ptp-netc.yaml new file mode 100644 index 000000000000..6af1899d904f --- /dev/null +++ b/Documentation/devicetree/bindings/ptp/nxp,ptp-netc.yaml @@ -0,0 +1,67 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/ptp/nxp,ptp-netc.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: NXP NETC Timer PTP clock + +description: + NETC Timer provides current time with nanosecond resolution, precise + periodic pulse, pulse on timeout (alarm), and time capture on external + pulse support. And it supports time synchronization as required for + IEEE 1588 and IEEE 802.1AS-2020. + +maintainers: + - Wei Fang + - Clark Wang + +properties: + compatible: + enum: + - pci1131,ee02 + + reg: + maxItems: 1 + + clocks: + maxItems: 1 + description: + The reference clock of NETC Timer, if not present, indicates that + the system clock of NETC IP is selected as the reference clock. + + clock-names: + description: + NETC Timer has three reference clock sources, set TMR_CTRL[CK_SEL] + by parsing clock name to select one of them as the reference clock. + The "system" means that the system clock of NETC IP is used as the + reference clock. + The "ccm_timer" means another clock from CCM as the reference clock. + The "ext_1588" means the reference clock comes from external IO pins. + enum: + - system + - ccm_timer + - ext_1588 + +required: + - compatible + - reg + +allOf: + - $ref: /schemas/pci/pci-device.yaml + +unevaluatedProperties: false + +examples: + - | + pcie { + #address-cells = <3>; + #size-cells = <2>; + + ethernet@18,0 { + compatible = "pci1131,ee02"; + reg = <0x00c000 0 0 0 0>; + clocks = <&scmi_clk 18>; + clock-names = "ccm_timer"; + }; + }; -- 2.34.1