netdev - [PATCH net-next v4 1/3] net: ethernet: mtk_eth_soc: improve support for named interrupts

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Message-ID: <aeccd00eccb7186d39d2c16292019b3b22ec53b8.1751421358.git.daniel@makrotopia.org>
Date: Wed, 2 Jul 2025 03:37:55 +0100
From: Daniel Golle <daniel@...rotopia.org>
To: Felix Fietkau <nbd@....name>,
	Frank Wunderlich <frank-w@...lic-files.de>,
	Eric Woudstra <ericwouds@...il.com>, Elad Yifee <eladwf@...il.com>,
	Bo-Cun Chen <bc-bocun.chen@...iatek.com>,
	Sky Huang <skylake.huang@...iatek.com>,
	Sean Wang <sean.wang@...iatek.com>,
	Lorenzo Bianconi <lorenzo@...nel.org>,
	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>,
	Matthias Brugger <matthias.bgg@...il.com>,
	AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>,
	netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org,
	linux-mediatek@...ts.infradead.org
Subject: [PATCH net-next v4 1/3] net: ethernet: mtk_eth_soc: improve support
 for named interrupts

Use platform_get_irq_byname_optional() to avoid outputting error
messages when using legacy device trees which rely identifying
interrupts only by index. Instead, output a warning notifying the user
to update their device tree.

Signed-off-by: Daniel Golle <daniel@...rotopia.org>
Reviewed-by: Andrew Lunn <andrew@...n.ch>
---
v4: unchanged
v3: unchanged
v2: unchanged

 drivers/net/ethernet/mediatek/mtk_eth_soc.c | 15 ++++++++++-----
 1 file changed, 10 insertions(+), 5 deletions(-)

diff --git a/drivers/net/ethernet/mediatek/mtk_eth_soc.c b/drivers/net/ethernet/mediatek/mtk_eth_soc.c
index f8a907747db4..8f55069441f4 100644
--- a/drivers/net/ethernet/mediatek/mtk_eth_soc.c
+++ b/drivers/net/ethernet/mediatek/mtk_eth_soc.c
@@ -3341,17 +3341,22 @@ static int mtk_get_irqs(struct platform_device *pdev, struct mtk_eth *eth)
 	int i;
 
 	/* future SoCs beginning with MT7988 should use named IRQs in dts */
-	eth->irq[MTK_FE_IRQ_TX] = platform_get_irq_byname(pdev, "fe1");
-	eth->irq[MTK_FE_IRQ_RX] = platform_get_irq_byname(pdev, "fe2");
+	eth->irq[MTK_FE_IRQ_TX] = platform_get_irq_byname_optional(pdev, "fe1");
+	eth->irq[MTK_FE_IRQ_RX] = platform_get_irq_byname_optional(pdev, "fe2");
 	if (eth->irq[MTK_FE_IRQ_TX] >= 0 && eth->irq[MTK_FE_IRQ_RX] >= 0)
 		return 0;
 
-	/* only use legacy mode if platform_get_irq_byname returned -ENXIO */
+	/* only use legacy mode if platform_get_irq_byname_optional returned -ENXIO */
 	if (eth->irq[MTK_FE_IRQ_TX] != -ENXIO)
-		return eth->irq[MTK_FE_IRQ_TX];
+		return dev_err_probe(&pdev->dev, eth->irq[MTK_FE_IRQ_TX],
+				     "Error requesting FE TX IRQ\n");
 
 	if (eth->irq[MTK_FE_IRQ_RX] != -ENXIO)
-		return eth->irq[MTK_FE_IRQ_RX];
+		return dev_err_probe(&pdev->dev, eth->irq[MTK_FE_IRQ_RX],
+				     "Error requesting FE RX IRQ\n");
+
+	if (!MTK_HAS_CAPS(eth->soc->caps, MTK_SHARED_INT))
+		dev_warn(&pdev->dev, "legacy DT: missing interrupt-names.");
 
 	/* legacy way:
 	 * On MTK_SHARED_INT SoCs (MT7621 + MT7628) the first IRQ is taken
-- 
2.50.0