[PATCH v4 1/4] net: stmmac: platform: read channels irq

[Jan Petrous via B4 Relay <devnull+jan.petrous.oss.nxp.com@kernel.org>]

From: "Jan Petrous (OSS)" <jan.petrous@oss.nxp.com>

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>
---
 .../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..94854bfb6e0d 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);
 

-- 
2.47.0