From: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>

Add interrupt support for the GMAC1 and GMAC2 PHYs on the RZ/N2H EVK
board. The PHYs are connected to the ICU via IRQ14 and IRQ15 lines
respectively.

Define RZN2H_IRQxx macros in the SoC DTSI to map the ICU IRQ_NS lines
to their absolute ICU interrupt space offsets.

Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
---
 arch/arm64/boot/dts/renesas/r9a09g087.dtsi     | 18 ++++++++++++++++++
 .../dts/renesas/r9a09g087m44-rzn2h-evk.dts     |  9 +++++++--
 2 files changed, 25 insertions(+), 2 deletions(-)

diff --git a/arch/arm64/boot/dts/renesas/r9a09g087.dtsi b/arch/arm64/boot/dts/renesas/r9a09g087.dtsi
index 6218cef2fca5..f697e9698ed3 100644
--- a/arch/arm64/boot/dts/renesas/r9a09g087.dtsi
+++ b/arch/arm64/boot/dts/renesas/r9a09g087.dtsi
@@ -8,6 +8,24 @@
 #include <dt-bindings/clock/renesas,r9a09g087-cpg-mssr.h>
 #include <dt-bindings/interrupt-controller/arm-gic.h>
 
+/* The IRQ_NS lines start at offset 16 in the ICU interrupt space */
+#define RZN2H_IRQ0	16
+#define RZN2H_IRQ1	17
+#define RZN2H_IRQ2	18
+#define RZN2H_IRQ3	19
+#define RZN2H_IRQ4	20
+#define RZN2H_IRQ5	21
+#define RZN2H_IRQ6	22
+#define RZN2H_IRQ7	23
+#define RZN2H_IRQ8	24
+#define RZN2H_IRQ9	25
+#define RZN2H_IRQ10	26
+#define RZN2H_IRQ11	27
+#define RZN2H_IRQ12	28
+#define RZN2H_IRQ13	29
+#define RZN2H_IRQ14	30
+#define RZN2H_IRQ15	31
+
 / {
 	compatible = "renesas,r9a09g087";
 	#address-cells = <2>;
diff --git a/arch/arm64/boot/dts/renesas/r9a09g087m44-rzn2h-evk.dts b/arch/arm64/boot/dts/renesas/r9a09g087m44-rzn2h-evk.dts
index 19f0a2c06753..821a74edab50 100644
--- a/arch/arm64/boot/dts/renesas/r9a09g087m44-rzn2h-evk.dts
+++ b/arch/arm64/boot/dts/renesas/r9a09g087m44-rzn2h-evk.dts
@@ -303,6 +303,7 @@ &i2c1 {
 };
 
 &mdio1_phy {
+	interrupts-extended = <&icu RZN2H_IRQ15 IRQ_TYPE_EDGE_FALLING>;
 	/*
 	 * PHY3 Reset Configuration:
 	 *
@@ -312,6 +313,7 @@ &mdio1_phy {
 };
 
 &mdio2_phy {
+	interrupts-extended = <&icu RZN2H_IRQ14 IRQ_TYPE_EDGE_FALLING>;
 	/*
 	 * PHY2 Reset Configuration:
 	 *
@@ -338,6 +340,7 @@ can1_pins: can1-pins {
 	 * DSW5[6] OFF - connect MDC/MDIO of Ethernet port 2 to GMAC2
 	 * DSW5[7] ON - use pins P29_1-P29_7, P30_0-P30_4, P30_7,
 	 * P31_2, P31_4 and P31_5 are used for Ethernet port 2
+	 * DSW13[7] OFF; DSW13[8] ON - use pin P13_7 for IRQ14
 	 */
 	gmac2_pins: gmac2-pins {
 		pinmux = <RZT2H_PORT_PINMUX(29, 1, 0xf)>, /* ETH2_TXCLK */
@@ -358,7 +361,8 @@ gmac2_pins: gmac2-pins {
 			 <RZT2H_PORT_PINMUX(31, 5, 0xf)>, /* ETH2_COL */
 			 <RZT2H_PORT_PINMUX(30, 5, 0x10)>, /* GMAC2_MDC */
 			 <RZT2H_PORT_PINMUX(30, 6, 0x10)>, /* GMAC2_MDIO */
-			 <RZT2H_PORT_PINMUX(31, 0, 0x2)>; /* ETH2_REFCLK */
+			 <RZT2H_PORT_PINMUX(31, 0, 0x2)>, /* ETH2_REFCLK */
+			 <RZT2H_PORT_PINMUX(13, 7, 0x0)>; /* IRQ14 */
 
 	};
 
@@ -388,7 +392,8 @@ gmac1_pins: gmac1-pins {
 			 <RZT2H_PORT_PINMUX(0, 3, 0xf)>, /* ETH3_COL */
 			 <RZT2H_PORT_PINMUX(26, 1, 0x10)>, /* GMAC1_MDC */
 			 <RZT2H_PORT_PINMUX(26, 2, 0x10)>, /* GMAC1_MDIO */
-			 <RZT2H_PORT_PINMUX(34, 6, 0x2)>; /* ETH3_REFCLK */
+			 <RZT2H_PORT_PINMUX(34, 6, 0x2)>, /* ETH3_REFCLK */
+			 <RZT2H_PORT_PINMUX(17, 3, 0x0)>; /* IRQ15 */
 	};
 
 	/*
-- 
2.53.0

On Thu, 12 Mar 2026 at 17:04, Prabhakar <prabhakar.csengg@gmail.com> wrote:
> From: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
>
> Add interrupt support for the GMAC1 and GMAC2 PHYs on the RZ/N2H EVK
> board. The PHYs are connected to the ICU via IRQ14 and IRQ15 lines
> respectively.
>
> Define RZN2H_IRQxx macros in the SoC DTSI to map the ICU IRQ_NS lines
> to their absolute ICU interrupt space offsets.
>
> Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>

Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
i.e. will queue in renesas-devel for v7.1.

Gr{oetje,eeting}s,

                        Geert

-- 
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds