[PATCH 5/6] usb: cdns3: Use platform_get_irq_byname() to get the interrupt

[Lad Prabhakar]

platform_get_resource_byname(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_byname().

Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@xxxxxxxxxxxxxx>
---
 drivers/usb/cdns3/cdns3-plat.c | 14 ++++++++------
 1 file changed, 8 insertions(+), 6 deletions(-)

diff --git a/drivers/usb/cdns3/cdns3-plat.c b/drivers/usb/cdns3/cdns3-plat.c
index 4d0f027e5bd3..dc068e940ed5 100644
--- a/drivers/usb/cdns3/cdns3-plat.c
+++ b/drivers/usb/cdns3/cdns3-plat.c
@@ -13,6 +13,7 @@
  */
 
 #include <linux/module.h>
+#include <linux/irq.h>
 #include <linux/kernel.h>
 #include <linux/platform_device.h>
 #include <linux/pm_runtime.h>
@@ -65,13 +66,14 @@ static int cdns3_plat_probe(struct platform_device *pdev)
 
 	platform_set_drvdata(pdev, cdns);
 
-	res = platform_get_resource_byname(pdev, IORESOURCE_IRQ, "host");
-	if (!res) {
-		dev_err(dev, "missing host IRQ\n");
-		return -ENODEV;
-	}
+	ret = platform_get_irq_byname(pdev, "host");
+	if (ret < 0)
+		return ret;
 
-	cdns->xhci_res[0] = *res;
+	cdns->xhci_res[0].start = ret;
+	cdns->xhci_res[0].end = ret;
+	cdns->xhci_res[0].flags = IORESOURCE_IRQ | irq_get_trigger_type(ret);
+	cdns->xhci_res[0].name = "host";
 
 	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "xhci");
 	if (!res) {
-- 
2.17.1