[PATCH v9 02/13] dt-bindings: net: mediatek,net: allow up to 8 IRQs

From: Frank Wunderlich <hidden>
Date: 2025-07-09 11:12:05
Also in: linux-arm-kernel, linux-devicetree, linux-mediatek, linux-pm, lkml
Subsystem: networking drivers, open firmware and flattened device tree bindings, the rest · Maintainers: Andrew Lunn, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Rob Herring, Krzysztof Kozlowski, Conor Dooley, Linus Torvalds

From: Frank Wunderlich <redacted>

Increase the maximum IRQ count to 8 (4 FE + 4 RSS/LRO).

Frame-engine-IRQs (max 4):
MT7621, MT7628: 1 FE-IRQ
MT7622, MT7623: 3 FE-IRQs (only two used by the driver for now)
MT7981, MT7986, MT7988: 4 FE-IRQs (only two used by the driver for now)

Mediatek Filogic SoCs (mt798x) have 4 additional IRQs for RSS and/or
LRO. So MT798x have 8 IRQs in total.

MT7981 does not have a ethernet-node yet.
MT7986 Ethernet node is updated with RSS/LRO IRQs in this series.
MT7988 Ethernet node is added in this series.

Signed-off-by: Frank Wunderlich <redacted>
---
v9:
- set interrupt minitems to 8 for filogic
  - mt7981 does not have a ethernet node yet, so no ABI break
  - devicetree for mt7986 is updated later in this series, ABI-Break,
    but RSS/LRO should use interrupt names and is simply disabled when
    using older DT
- extend mt7986 example with PDMA-IRQs because minItems now 8
v8: separate irq-count change from interrupt-names patch
---
 .../devicetree/bindings/net/mediatek,net.yaml      | 14 +++++++++-----
 1 file changed, 9 insertions(+), 5 deletions(-)

diff --git a/Documentation/devicetree/bindings/net/mediatek,net.yaml b/Documentation/devicetree/bindings/net/mediatek,net.yaml
index 175d1d011dc6..99dc0401eb9a 100644
--- a/Documentation/devicetree/bindings/net/mediatek,net.yaml
+++ b/Documentation/devicetree/bindings/net/mediatek,net.yaml

@@ -40,7 +40,7 @@ properties:
 
   interrupts:
     minItems: 1
-    maxItems: 4
+    maxItems: 8
 
   power-domains:
     maxItems: 1

@@ -272,7 +272,7 @@ allOf:
     then:
       properties:
         interrupts:
-          minItems: 4
+          minItems: 8
 
         clocks:
           minItems: 15

@@ -310,7 +310,7 @@ allOf:
     then:
       properties:
         interrupts:
-          minItems: 4
+          minItems: 8
 
         clocks:
           minItems: 15

@@ -348,7 +348,7 @@ allOf:
     then:
       properties:
         interrupts:
-          minItems: 4
+          minItems: 8
 
         clocks:
           minItems: 24

@@ -507,7 +507,11 @@ examples:
         interrupts = <GIC_SPI 196 IRQ_TYPE_LEVEL_HIGH>,
                      <GIC_SPI 197 IRQ_TYPE_LEVEL_HIGH>,
                      <GIC_SPI 198 IRQ_TYPE_LEVEL_HIGH>,
-                     <GIC_SPI 199 IRQ_TYPE_LEVEL_HIGH>;
+                     <GIC_SPI 199 IRQ_TYPE_LEVEL_HIGH>,
+                     <GIC_SPI 189 IRQ_TYPE_LEVEL_HIGH>,
+                     <GIC_SPI 190 IRQ_TYPE_LEVEL_HIGH>,
+                     <GIC_SPI 191 IRQ_TYPE_LEVEL_HIGH>,
+                     <GIC_SPI 192 IRQ_TYPE_LEVEL_HIGH>;
         clocks = <&ethsys CLK_ETH_FE_EN>,
                  <&ethsys CLK_ETH_GP2_EN>,
                  <&ethsys CLK_ETH_GP1_EN>,

-- 
2.43.0

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