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@kernel.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 d25c9e799c8b0725e82f44f067112caa101ec12e..68ddc940f675b42599bd2c0245dc715bb56edb32 100644
--- a/drivers/net/ethernet/airoha/airoha_npu.c
+++ b/drivers/net/ethernet/airoha/airoha_npu.c
@@ -694,6 +694,15 @@ 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 8e830d12bd8a518038f2df7605a5d9f455725e40..981b283806fa8347256f6dce756729daa4736e47 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 {

-- 
2.50.1