[PATCH] arm64: dts: ti: k3-am654-icssg2: Enable PHY interrupts for ICSSG2

[Siddharth Vadapalli]

Enable interrupt mode of operation of the DP83867 Ethernet PHY which is
used by ICSSG2. The DP83867 PHY driver already supports interrupt handling
for interrupts generated by the PHY. Thus, add the necessary device-tree
support to enable it.

Since the GPIO1_87 line is muxed with EXT_REFCLK1 and SYNC1_OUT, update
the pinmux to select GPIO1_87 for routing the interrupt.

Signed-off-by: Siddharth Vadapalli <s-vadapalli@xxxxxx>
---

This patch is based on linux-next tagged next-20231120.

Regards,
Siddharth.

 arch/arm64/boot/dts/ti/k3-am654-icssg2.dtso | 17 +++++++++++++++--
 1 file changed, 15 insertions(+), 2 deletions(-)

diff --git a/arch/arm64/boot/dts/ti/k3-am654-icssg2.dtso b/arch/arm64/boot/dts/ti/k3-am654-icssg2.dtso
index ec8cf20ca3ac..9f723592d0f4 100644
--- a/arch/arm64/boot/dts/ti/k3-am654-icssg2.dtso
+++ b/arch/arm64/boot/dts/ti/k3-am654-icssg2.dtso
@@ -124,21 +124,34 @@ AM65X_IOPAD(0x0088, PIN_INPUT, 2) /* (AG17) PRG2_PRU0_GPO4.PRG2_RGMII1_RX_CTL */
 	};
 };
 
+&main_pmx1 {
+	/* Select GPIO1_87 for ICSSG2 PHY interrupt */
+	icssg2_phy_irq_pins_default: icssg2-phy-irq-default-pins {
+		pinctrl-single,pins = <
+			AM65X_IOPAD(0x0014, PIN_INPUT, 7) /* (A22) EXT_REFCLK1.GPIO1_87 */
+		>;
+	};
+};
+
 &icssg2_mdio {
 	status = "okay";
-	pinctrl-names = "default";
-	pinctrl-0 = <&icssg2_mdio_pins_default>;
+	pinctrl-names = "default", "icssg2-phy-irq";
+	pinctrl-0 = <&icssg2_mdio_pins_default>, <&icssg2_phy_irq_pins_default>;
 	#address-cells = <1>;
 	#size-cells = <0>;
 
 	icssg2_phy0: ethernet-phy@0 {
 		reg = <0>;
+		interrupt-parent = <&main_gpio1>;
+		interrupts = <87 0x2>;
 		ti,rx-internal-delay = <DP83867_RGMIIDCTL_2_00_NS>;
 		ti,fifo-depth = <DP83867_PHYCR_FIFO_DEPTH_4_B_NIB>;
 	};
 
 	icssg2_phy1: ethernet-phy@3 {
 		reg = <3>;
+		interrupt-parent = <&main_gpio1>;
+		interrupts = <87 0x2>;
 		ti,rx-internal-delay = <DP83867_RGMIIDCTL_2_00_NS>;
 		ti,fifo-depth = <DP83867_PHYCR_FIFO_DEPTH_4_B_NIB>;
 	};
-- 
2.34.1