media: camss: Use platform_get_irq_byname() to get the interrupt

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@bp.renesas.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>

drivers/media/platform/qcom/camss/camss-csid.c

@@ -562,7 +562,6 @@ int msm_csid_subdev_init(struct camss *camss, struct csid_device *csid,
 {
 	struct device *dev = camss->dev;
 	struct platform_device *pdev = to_platform_device(dev);
-	struct resource *r;
 	int i, j;
 	int ret;
 
@@ -601,14 +600,11 @@ int msm_csid_subdev_init(struct camss *camss, struct csid_device *csid,
 
 	/* Interrupt */
 
-	r = platform_get_resource_byname(pdev, IORESOURCE_IRQ,
-					 res->interrupt[0]);
-	if (!r) {
-		dev_err(dev, "missing IRQ\n");
-		return -EINVAL;
-	}
+	ret = platform_get_irq_byname(pdev, res->interrupt[0]);
+	if (ret < 0)
+		return ret;
 
-	csid->irq = r->start;
+	csid->irq = ret;
 	snprintf(csid->irq_name, sizeof(csid->irq_name), "%s_%s%d",
 		 dev_name(dev), MSM_CSID_NAME, csid->id);
 	ret = devm_request_irq(dev, csid->irq, csid->ops->isr,

drivers/media/platform/qcom/camss/camss-csiphy.c

@@ -569,7 +569,6 @@ 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;
 
@@ -613,14 +612,11 @@ int msm_csiphy_subdev_init(struct camss *camss,
 
 	/* Interrupt */
 
-	r = platform_get_resource_byname(pdev, IORESOURCE_IRQ,
-					 res->interrupt[0]);
-	if (!r) {
-		dev_err(dev, "missing IRQ\n");
-		return -EINVAL;
-	}
+	ret = platform_get_irq_byname(pdev, res->interrupt[0]);
+	if (ret < 0)
+		return ret;
 
-	csiphy->irq = r->start;
+	csiphy->irq = ret;
 	snprintf(csiphy->irq_name, sizeof(csiphy->irq_name), "%s_%s%d",
 		 dev_name(dev), MSM_CSIPHY_NAME, csiphy->id);
 

drivers/media/platform/qcom/camss/camss-ispif.c

@@ -1100,7 +1100,6 @@ int msm_ispif_subdev_init(struct camss *camss,
 	struct device *dev = camss->dev;
 	struct ispif_device *ispif = camss->ispif;
 	struct platform_device *pdev = to_platform_device(dev);
-	struct resource *r;
 	int i;
 	int ret;
 
@@ -1153,14 +1152,11 @@ int msm_ispif_subdev_init(struct camss *camss,
 
 	/* Interrupt */
 
-	r = platform_get_resource_byname(pdev, IORESOURCE_IRQ, res->interrupt);
-
-	if (!r) {
-		dev_err(dev, "missing IRQ\n");
-		return -EINVAL;
-	}
+	ret = platform_get_irq_byname(pdev, res->interrupt);
+	if (ret < 0)
+		return ret;
 
-	ispif->irq = r->start;
+	ispif->irq = ret;
 	snprintf(ispif->irq_name, sizeof(ispif->irq_name), "%s_%s",
 		 dev_name(dev), MSM_ISPIF_NAME);
 	if (camss->version == CAMSS_8x16)

drivers/media/platform/qcom/camss/camss-vfe.c

@@ -1281,7 +1281,6 @@ int msm_vfe_subdev_init(struct camss *camss, struct vfe_device *vfe,
 {
 	struct device *dev = camss->dev;
 	struct platform_device *pdev = to_platform_device(dev);
-	struct resource *r;
 	int i, j;
 	int ret;
 
@@ -1316,14 +1315,11 @@ int msm_vfe_subdev_init(struct camss *camss, struct vfe_device *vfe,
 
 	/* Interrupt */
 
-	r = platform_get_resource_byname(pdev, IORESOURCE_IRQ,
-					 res->interrupt[0]);
-	if (!r) {
-		dev_err(dev, "missing IRQ\n");
-		return -EINVAL;
-	}
+	ret = platform_get_irq_byname(pdev, res->interrupt[0]);
+	if (ret < 0)
+		return ret;
 
-	vfe->irq = r->start;
+	vfe->irq = ret;
 	snprintf(vfe->irq_name, sizeof(vfe->irq_name), "%s_%s%d",
 		 dev_name(dev), MSM_VFE_NAME, id);
 	ret = devm_request_irq(dev, vfe->irq, vfe->ops->isr,