netdev - [PATCH net-next v2 5/7] net: airoha: npu: Read NPU wlan interrupt lines from the DTS

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Message-Id: <20250705-airoha-en7581-wlan-offlaod-v2-5-3cf32785e381@kernel.org>
Date: Sat, 05 Jul 2025 23:09:49 +0200
From: Lorenzo Bianconi <lorenzo@...nel.org>
To: Andrew Lunn <andrew+netdev@...n.ch>, 
 "David S. Miller" <davem@...emloft.net>, Eric Dumazet <edumazet@...gle.com>, 
 Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>, 
 Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>, Lorenzo Bianconi <lorenzo@...nel.org>
Cc: linux-arm-kernel@...ts.infradead.org, 
 linux-mediatek@...ts.infradead.org, netdev@...r.kernel.org, 
 devicetree@...r.kernel.org
Subject: [PATCH net-next v2 5/7] net: airoha: npu: Read NPU wlan interrupt
 lines from the DTS

Read all NPU wlan IRQ lines from the NPU device-tree node.
NPU module fires wlan irq lines when the traffic to/from the WiFi NIC is
not hw accelerated (these interrupts will be consumed by the MT76 driver
in subsequent patches).
This is a preliminary patch to enable wlan flowtable offload for EN7581
SoC.

Signed-off-by: Lorenzo Bianconi <lorenzo@...nel.org>
---
 drivers/net/ethernet/airoha/airoha_npu.c | 9 +++++++++
 drivers/net/ethernet/airoha/airoha_npu.h | 3 +++
 2 files changed, 12 insertions(+)

diff --git a/drivers/net/ethernet/airoha/airoha_npu.c b/drivers/net/ethernet/airoha/airoha_npu.c
index aa7edb60e5d1d19fbfc0675bae623cab346bf211..8c31df5b760730814ccfaa9fffff6c6aa8742f01 100644
--- a/drivers/net/ethernet/airoha/airoha_npu.c
+++ b/drivers/net/ethernet/airoha/airoha_npu.c
@@ -701,6 +701,15 @@ static int airoha_npu_probe(struct platform_device *pdev)
 		INIT_WORK(&core->wdt_work, airoha_npu_wdt_work);
 	}

+	/* wlan IRQ lines */
+	for (i = 0; i < ARRAY_SIZE(npu->irqs); i++) {
+		irq = platform_get_irq(pdev, i + ARRAY_SIZE(npu->cores) + 1);
+		if (irq < 0)
+			return irq;
+
+		npu->irqs[i] = irq;
+	}
+
 	err = dma_set_coherent_mask(dev, DMA_BIT_MASK(32));
 	if (err)
 		return err;
diff --git a/drivers/net/ethernet/airoha/airoha_npu.h b/drivers/net/ethernet/airoha/airoha_npu.h
index 9e225df8b6c94b40386cc015cc086e9de7489a53..72b1d41d99e798ed32e8abdaa443e4775c6defd1 100644
--- a/drivers/net/ethernet/airoha/airoha_npu.h
+++ b/drivers/net/ethernet/airoha/airoha_npu.h
@@ -5,6 +5,7 @@
  */

 #define NPU_NUM_CORES		8
+#define NPU_NUM_IRQ		6

 enum airoha_npu_wlan_set_cmd {
 	WLAN_FUNC_SET_WAIT_PCIE_ADDR,
@@ -67,6 +68,8 @@ struct airoha_npu {
 		struct work_struct wdt_work;
 	} cores[NPU_NUM_CORES];

+	int irqs[NPU_NUM_IRQ];
+
 	struct airoha_foe_stats __iomem *stats;

 	struct {

-- 
2.50.0