linux-kernel - Re: [PATCH RFC v2 1/4] net: stmmac: platform: read channels irq

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Message-ID: <6573c875-7ee4-4ca9-90b2-d78ca3b4ae55@suse.com>
Date: Wed, 21 Jan 2026 17:14:37 +0100
From: Matthias Brugger <mbrugger@...e.com>
To: jan.petrous@....nxp.com, 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>,
 Maxime Coquelin <mcoquelin.stm32@...il.com>,
 Alexandre Torgue <alexandre.torgue@...s.st.com>,
 Chester Lin <chester62515@...il.com>,
 Ghennadi Procopciuc <ghennadi.procopciuc@....nxp.com>,
 NXP S32 Linux Team <s32@....com>, Shawn Guo <shawnguo@...nel.org>,
 Sascha Hauer <s.hauer@...gutronix.de>,
 Pengutronix Kernel Team <kernel@...gutronix.de>,
 Fabio Estevam <festevam@...il.com>, Rob Herring <robh@...nel.org>,
 Krzysztof Kozlowski <krzk+dt@...nel.org>, Conor Dooley <conor+dt@...nel.org>
Cc: netdev@...r.kernel.org, linux-stm32@...md-mailman.stormreply.com,
 linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
 imx@...ts.linux.dev, devicetree@...r.kernel.org
Subject: Re: [PATCH RFC v2 1/4] net: stmmac: platform: read channels irq

On 21/01/2026 15:23, Jan Petrous via B4 Relay wrote:
> From: "Jan Petrous (OSS)" <jan.petrous@....nxp.com>
> 
> Read IRQ resources for all rx/tx channels, to allow Multi-IRQ mode
> for platform glue drivers.
> 
> Signed-off-by: Jan Petrous (OSS) <jan.petrous@....nxp.com>

Reviewed-by: Matthias Brugger <mbrugger@...e.com>

> ---
>   .../net/ethernet/stmicro/stmmac/stmmac_platform.c  | 38 +++++++++++++++++++++-
>   1 file changed, 37 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c
> index 8979a50b5507..f10a691b8add 100644
> --- a/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c
> +++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c
> @@ -700,6 +700,9 @@ EXPORT_SYMBOL_GPL(stmmac_pltfr_find_clk);
>   int stmmac_get_platform_resources(struct platform_device *pdev,
>   				  struct stmmac_resources *stmmac_res)
>   {
> +	char name[16];
> +	int i;
> +
>   	memset(stmmac_res, 0, sizeof(*stmmac_res));
>   
>   	/* Get IRQ information early to have an ability to ask for deferred
> @@ -743,7 +746,40 @@ int stmmac_get_platform_resources(struct platform_device *pdev,
>   
>   	stmmac_res->addr = devm_platform_ioremap_resource(pdev, 0);
>   
> -	return PTR_ERR_OR_ZERO(stmmac_res->addr);
> +	if (IS_ERR(stmmac_res->addr))
> +		return PTR_ERR(stmmac_res->addr);
> +
> +	/* RX channels irq */
> +	for (i = 0; i < MTL_MAX_RX_QUEUES; i++) {
> +		scnprintf(name, sizeof(name), "rx-queue-%d", i);
> +		stmmac_res->rx_irq[i] = platform_get_irq_byname_optional(pdev,
> +									 name);
> +		if (stmmac_res->rx_irq[i] < 0) {
> +			if (stmmac_res->rx_irq[i] == -EPROBE_DEFER)
> +				return -EPROBE_DEFER;
> +			dev_dbg(&pdev->dev, "IRQ rx-queue-%d not found\n", i);
> +
> +			/* Stop on first unset rx-queue-%i property member */
> +			break;
> +		}
> +	}
> +
> +	/* TX channels irq */
> +	for (i = 0; i < MTL_MAX_TX_QUEUES; i++) {
> +		scnprintf(name, sizeof(name), "tx-queue-%d", i);
> +		stmmac_res->tx_irq[i] = platform_get_irq_byname_optional(pdev,
> +									 name);
> +		if (stmmac_res->tx_irq[i] < 0) {
> +			if (stmmac_res->tx_irq[i] == -EPROBE_DEFER)
> +				return -EPROBE_DEFER;
> +			dev_dbg(&pdev->dev, "IRQ tx-queue-%d not found\n", i);
> +
> +			/* Stop on first unset tx-queue-%i property member */
> +			break;
> +		}
> +	}
> +
> +	return 0;
>   }
>   EXPORT_SYMBOL_GPL(stmmac_get_platform_resources);
>   
>