arm64: dts: imx8mp: Fix LAN8740Ai PHY reference clock on DH electronics i.MX8M Plus...

[ Upstream commit c63749a7ddc59ac6ec0b05abfa0a21af9f2c1d38 ]

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 <marek.vasut@mailbox.org>
Tested-by: Christoph Niedermaier <cniedermaier@dh-electronics.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/arch/arm64/boot/dts/freescale/imx8mp-dhcom-som.dtsi b/arch/arm64/boot/dts/freescale/imx8mp-dhcom-som.dtsi
index 2fd50b5890afa4842028401e9adcd471df6e1003..0b81b85887f406a8bbbfafecaa6a2078622324a2 100644 (file)
--- a/arch/arm64/boot/dts/freescale/imx8mp-dhcom-som.dtsi
+++ b/arch/arm64/boot/dts/freescale/imx8mp-dhcom-som.dtsi
@@ -97,6 +97,7 @@
                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>;