Add the new binding documentation for MediaTek frequency hopping and spread spectrum clocking control. Co-developed-by: Edward-JW Yang <edward-jw.yang@xxxxxxxxxxxx> Signed-off-by: Edward-JW Yang <edward-jw.yang@xxxxxxxxxxxx> Signed-off-by: Johnson Wang <johnson.wang@xxxxxxxxxxxx> Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@xxxxxxxxxxxxx> Reviewed-by: Rob Herring <robh@xxxxxxxxxx> --- .../bindings/clock/mediatek,mt8186-fhctl.yaml | 53 +++++++++++++++++++ 1 file changed, 53 insertions(+) create mode 100644 Documentation/devicetree/bindings/clock/mediatek,mt8186-fhctl.yaml diff --git a/Documentation/devicetree/bindings/clock/mediatek,mt8186-fhctl.yaml b/Documentation/devicetree/bindings/clock/mediatek,mt8186-fhctl.yaml new file mode 100644 index 000000000000..cfd042ac1e14 --- /dev/null +++ b/Documentation/devicetree/bindings/clock/mediatek,mt8186-fhctl.yaml @@ -0,0 +1,53 @@ +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/clock/mediatek,mt8186-fhctl.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: MediaTek frequency hopping and spread spectrum clocking control + +maintainers: + - Edward-JW Yang <edward-jw.yang@xxxxxxxxxxxx> + +description: | + Frequency hopping control (FHCTL) is a piece of hardware that control + some PLLs to adopt "hopping" mechanism to adjust their frequency. + Spread spectrum clocking (SSC) is another function provided by this hardware. + +properties: + compatible: + const: mediatek,mt8186-fhctl + + reg: + maxItems: 1 + + clocks: + description: Phandles of the PLL with FHCTL hardware capability. + minItems: 1 + maxItems: 30 + + mediatek,hopping-ssc-percent: + description: The percentage of spread spectrum clocking for one PLL. + minItems: 1 + maxItems: 30 + items: + default: 0 + minimum: 0 + maximum: 8 + +required: + - compatible + - reg + - clocks + +additionalProperties: false + +examples: + - | + #include <dt-bindings/clock/mt8186-clk.h> + fhctl: fhctl@1000ce00 { + compatible = "mediatek,mt8186-fhctl"; + reg = <0x1000ce00 0x200>; + clocks = <&apmixedsys CLK_APMIXED_MSDCPLL>; + mediatek,hopping-ssc-percent = <3>; + }; -- 2.18.0
