Add missing 'clocks' property to LAN8740Ai PHY node, to allow the PHY driver
to manage LAN8740Ai CLKIN reference clock supply. This fixes sporadic link
bouncing caused by interruptions on the PHY reference clock, by letting the
PHY driver manage the reference clock and assure there are no interruptions.

This follows the matching PHY driver recommendation described in commit
bedd8d78aba3 ("net: phy: smsc: LAN8710/20: add phy refclk in support")

Fixes: 8d6712695bc8 ("arm64: dts: imx8mp: Add support for DH electronics i.MX8M Plus DHCOM
and PDK2")
Signed-off-by: Marek Vasut <redacted>
---
Cc: Christoph Niedermaier <cniedermaier@dh-electronics.com>
Cc: Conor Dooley <conor+dt@kernel.org>
Cc: Fabio Estevam <festevam@gmail.com>
Cc: Krzysztof Kozlowski <krzk+dt@kernel.org>
Cc: Pengutronix Kernel Team <kernel@pengutronix.de>
Cc: Rob Herring <robh@kernel.org>
Cc: Sascha Hauer <s.hauer@pengutronix.de>
Cc: Shawn Guo <shawnguo@kernel.org>
Cc: devicetree@vger.kernel.org
Cc: imx@lists.linux.dev
Cc: kernel@dh-electronics.com
Cc: linux-arm-kernel@lists.infradead.org
---
 arch/arm64/boot/dts/freescale/imx8mp-dhcom-som.dtsi | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/arm64/boot/dts/freescale/imx8mp-dhcom-som.dtsi

b/arch/arm64/boot/dts/freescale/imx8mp-dhcom-som.dtsi
index 68c2e0156a5c8..f8303b7e2bd22 100644

--- a/arch/arm64/boot/dts/freescale/imx8mp-dhcom-som.dtsi
+++ b/arch/arm64/boot/dts/freescale/imx8mp-dhcom-som.dtsi

@@ -113,6 +113,7 @@ mdio {
                ethphy0f: ethernet-phy@1 { /* SMSC LAN8740Ai */
                        compatible = "ethernet-phy-id0007.c110",
                                     "ethernet-phy-ieee802.3-c22";
+                       clocks = <&clk IMX8MP_CLK_ENET_QOS>;
                        interrupt-parent = <&gpio3>;
                        interrupts = <19 IRQ_TYPE_LEVEL_LOW>;
                        pinctrl-0 = <&pinctrl_ethphy0>;