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net: stmmac: platform: read channels irq

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JIRA: https://redhat.atlassian.net/browse/RHEL-168971

commit a31bbe5ca2f8265f9c7dbc78f1787b88a1ad1775
Author: Jan Petrous (OSS) <jan.petrous@oss.nxp.com>
Date:   Fri Mar 13 08:13:32 2026 +0100

    net: stmmac: platform: read channels irq

    Read IRQ resources for all rx/tx channels, to allow Multi-IRQ mode
    for platform glue drivers.

    Reviewed-by: Matthias Brugger <mbrugger@suse.com>
    Signed-off-by: Jan Petrous (OSS) <jan.petrous@oss.nxp.com>
    Reviewed-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
    Link: https://patch.msgid.link/20260313-dwmac_multi_irq-v12-1-b5c9d0aa13d6@oss.nxp.com
    Signed-off-by: Jakub Kicinski <kuba@kernel.org>

Signed-off-by: Jared Kangas <jkangas@redhat.com>
This commit is contained in:
Jared Kangas
2026-08-25 12:06:29 -07:00
parent afa81ddbe0
commit b4c6fc2bcd
1 changed files with 56 additions and 1 deletions
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drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c
+56 -1
View File
@@ -733,9 +733,47 @@ struct clk *stmmac_pltfr_find_clk(struct plat_stmmacenet_data *plat_dat,
}
EXPORT_SYMBOL_GPL(stmmac_pltfr_find_clk);
/**
* stmmac_pltfr_get_irq_array - Read per-channel IRQs from platform device
* @pdev: platform device
* @fmt: IRQ name format string (e.g., "tx-queue-%d")
* @irqs: array to store IRQ numbers
* @num: maximum number of IRQs to read
*
* Return: 0 on success, -EPROBE_DEFER if IRQ is deferred, -EINVAL on error.
* Missing IRQs are set to 0 and iteration stops at first missing IRQ.
*/
static int stmmac_pltfr_get_irq_array(struct platform_device *pdev,
const char *fmt, int *irqs, size_t num)
{
char name[16];
int i;
for (i = 0; i < num; i++) {
if (snprintf(name, sizeof(name), fmt, i) >= sizeof(name))
return -EINVAL;
irqs[i] = platform_get_irq_byname_optional(pdev, name);
if (irqs[i] == -EPROBE_DEFER)
return -EPROBE_DEFER;
if (irqs[i] <= 0) {
dev_dbg(&pdev->dev, "IRQ %s not found\n", name);
/* Stop silently on first unset irq */
irqs[i] = 0;
break;
}
}
return 0;
}
int stmmac_get_platform_resources(struct platform_device *pdev,
struct stmmac_resources *stmmac_res)
{
int ret;
memset(stmmac_res, 0, sizeof(*stmmac_res));
/* Get IRQ information early to have an ability to ask for deferred
@@ -779,7 +817,24 @@ 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);
/* TX channels irq */
ret = stmmac_pltfr_get_irq_array(pdev, "tx-queue-%d",
stmmac_res->tx_irq,
MTL_MAX_TX_QUEUES);
if (ret)
return ret;
/* RX channels irq */
ret = stmmac_pltfr_get_irq_array(pdev, "rx-queue-%d",
stmmac_res->rx_irq,
MTL_MAX_RX_QUEUES);
if (ret)
return ret;
return 0;
}
EXPORT_SYMBOL_GPL(stmmac_get_platform_resources);