can: ti_hecc: ti_hecc_probe(): use platform_get_irq() to get the interrupt

platform_get_resource(pdev, IORESOURCE_IRQ, ..) relies on static
allocation of IRQ resources in DT core code, this causes an issue when
using hierarchical interrupt domains using "interrupts" property in
the node as this bypasses the hierarchical setup and messes up the irq
chaining.

In preparation for removal of static setup of IRQ resource from DT
core code use platform_get_irq().

Link: https://lore.kernel.org/all/20211221194508.11737-1-prabhakar.mahadev-lad.rj@bp.renesas.com
Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>

diff --git a/drivers/net/can/ti_hecc.c b/drivers/net/can/ti_hecc.c
index 353062ead98ffa0c53c8f0d7c01e6556df8b2770..ff31b993ab178f361bd2bc271f2e612b383fbb30 100644 (file)
--- a/drivers/net/can/ti_hecc.c
+++ b/drivers/net/can/ti_hecc.c
@@ -859,7 +859,6 @@ static int ti_hecc_probe(struct platform_device *pdev)
        struct net_device *ndev = (struct net_device *)0;
        struct ti_hecc_priv *priv;
        struct device_node *np = pdev->dev.of_node;
-       struct resource *irq;
        struct regulator *reg_xceiver;
        int err = -ENODEV;
 
@@ -904,9 +903,9 @@ static int ti_hecc_probe(struct platform_device *pdev)
                goto probe_exit_candev;
        }
 
-       irq = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
-       if (!irq) {
-               dev_err(&pdev->dev, "No irq resource\n");
+       ndev->irq = platform_get_irq(pdev, 0);
+       if (ndev->irq < 0) {
+               err = ndev->irq;
                goto probe_exit_candev;
        }
 
@@ -920,7 +919,6 @@ static int ti_hecc_probe(struct platform_device *pdev)
        priv->can.ctrlmode_supported = CAN_CTRLMODE_3_SAMPLES;
 
        spin_lock_init(&priv->mbx_lock);
-       ndev->irq = irq->start;
        ndev->flags |= IFF_ECHO;
        platform_set_drvdata(pdev, ndev);
        SET_NETDEV_DEV(ndev, &pdev->dev);