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net: ethernet: mtk_eth_soc: support named IRQs

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Add named interrupts and keep index based fallback for existing
devicetrees.

Currently only rx and tx IRQs are defined to be used with mt7988, but
later extended with RSS/LRO support.

Signed-off-by: Frank Wunderlich <frank-w@public-files.de>
Reviewed-by: Simon Horman <horms@kernel.org>
Link: https://patch.msgid.link/20250619132125.78368-2-linux@fw-web.de
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Frank Wunderlich 2025-06-19 15:21:21 +02:00 committed by Jakub Kicinski
parent b7ac47616f
commit ee85b483fe
1 changed files with 35 additions and 11 deletions
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46
drivers/net/ethernet/mediatek/mtk_eth_soc.c
View File

@ -3336,6 +3336,37 @@ static void mtk_tx_timeout(struct net_device *dev, unsigned int txqueue)
schedule_work(&eth->pending_work);
}
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[1] = platform_get_irq_byname(pdev, "fe1");
eth->irq[2] = platform_get_irq_byname(pdev, "fe2");
if (eth->irq[1] >= 0 && eth->irq[2] >= 0)
return 0;
/* legacy way:
* On MTK_SHARED_INT SoCs (MT7621 + MT7628) the first IRQ is taken
* from devicetree and used for both RX and TX - it is shared.
* On SoCs with non-shared IRQs the first entry is not used,
* the second is for TX, and the third is for RX.
*/
for (i = 0; i < 3; i++) {
if (MTK_HAS_CAPS(eth->soc->caps, MTK_SHARED_INT) && i > 0)
eth->irq[i] = eth->irq[0];
else
eth->irq[i] = platform_get_irq(pdev, i);
if (eth->irq[i] < 0) {
dev_err(&pdev->dev, "no IRQ%d resource found\n", i);
return -ENXIO;
}
}
return 0;
}
static irqreturn_t mtk_handle_irq_rx(int irq, void *_eth)
{
struct mtk_eth *eth = _eth;
@ -5105,17 +5136,10 @@ static int mtk_probe(struct platform_device *pdev)
}
}
for (i = 0; i < 3; i++) {
if (MTK_HAS_CAPS(eth->soc->caps, MTK_SHARED_INT) && i > 0)
eth->irq[i] = eth->irq[0];
else
eth->irq[i] = platform_get_irq(pdev, i);
if (eth->irq[i] < 0) {
dev_err(&pdev->dev, "no IRQ%d resource found\n", i);
err = -ENXIO;
goto err_wed_exit;
}
}
err = mtk_get_irqs(pdev, eth);
if (err)
goto err_wed_exit;
for (i = 0; i < ARRAY_SIZE(eth->clks); i++) {
eth->clks[i] = devm_clk_get(eth->dev,
mtk_clks_source_name[i]);