[PATCH] media: camss-csiphy: Use platform_get_irq_byname() to get the interrupt

[zhaoxiao]

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 bypassed the hierarchical setup and messed 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: zhaoxiao <zhaoxiao@xxxxxxxxxxxxx>
---
 drivers/media/platform/qcom/camss/camss-csiphy.c | 14 ++++----------
 1 file changed, 4 insertions(+), 10 deletions(-)

diff --git a/drivers/media/platform/qcom/camss/camss-csiphy.c b/drivers/media/platform/qcom/camss/camss-csiphy.c
index 24eec16197e7..92bdd1cd260f 100644
--- a/drivers/media/platform/qcom/camss/camss-csiphy.c
+++ b/drivers/media/platform/qcom/camss/camss-csiphy.c
@@ -568,7 +568,6 @@ int msm_csiphy_subdev_init(struct camss *camss,
 {
 	struct device *dev = camss->dev;
 	struct platform_device *pdev = to_platform_device(dev);
-	struct resource *r;
 	int i, j;
 	int ret;
 
@@ -610,19 +609,14 @@ int msm_csiphy_subdev_init(struct camss *camss,
 	}
 
 	/* Interrupt */
+	ret = platform_get_irq_byname(pdev, res->interrupt[0]);
+	if (ret < 0)
+		return ret;
 
-	r = platform_get_resource_byname(pdev, IORESOURCE_IRQ,
-					 res->interrupt[0]);
-	if (!r) {
-		dev_err(dev, "missing IRQ\n");
-		return -EINVAL;
-	}
-
-	csiphy->irq = r->start;
 	snprintf(csiphy->irq_name, sizeof(csiphy->irq_name), "%s_%s%d",
 		 dev_name(dev), MSM_CSIPHY_NAME, csiphy->id);
 
-	ret = devm_request_irq(dev, csiphy->irq, csiphy->ops->isr,
+	ret = devm_request_irq(dev, ret, csiphy->ops->isr,
 			       IRQF_TRIGGER_RISING | IRQF_NO_AUTOEN,
 			       csiphy->irq_name, csiphy);
 	if (ret < 0) {
-- 
2.20.1