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dt-bindings: phy: mediatek: tphy: add a property for power-domains

Include the MediaTek TPHY in a power domain. Add the 'power-domains'
property in the Device Tree (DT) Schema and set 'maxItems: 1'.

Also, include a reminder in the description of the 'power-domains'
property.

Signed-off-by: Macpaul Lin <macpaul.lin@mediatek.com>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20241012035016.17667-1-macpaul.lin@mediatek.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>

authored by

Macpaul Lin and committed by
Vinod Koul 2ac03d08 3f12bf16

+10
+10
Documentation/devicetree/bindings/phy/mediatek,tphy.yaml
··· 125 125 $ref: /schemas/types.yaml#/definitions/uint32 126 126 default: 28 127 127 128 + power-domains: 129 + description: 130 + The TPHY of MediaTek should exist within a power domain. The 131 + developer should be aware that the hardware design of MediaTek TPHY 132 + does not require the addition of MTCMOS. If the power to the TPHY 133 + is turned off, it will impact other functions. From the current 134 + perspective of USB hardware design, even if MTCMOS is added to the 135 + TPHY, it should remain always on. 136 + maxItems: 1 137 + 128 138 # Required child node: 129 139 patternProperties: 130 140 "^(usb|pcie|sata)-phy@[0-9a-f]+$":