linux-kernel - [PATCH 05/13] media: stm32-dma2d: Use platform_get

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Message-Id: <20211223173015.22251-6-prabhakar.mahadev-lad.rj@bp.renesas.com>
Date:   Thu, 23 Dec 2021 17:30:06 +0000
From:   Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>
To:     linux-media@...r.kernel.org,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Maxime Coquelin <mcoquelin.stm32@...il.com>,
        Alexandre Torgue <alexandre.torgue@...s.st.com>
Cc:     Hans Verkuil <hverkuil-cisco@...all.nl>,
        Rob Herring <robh+dt@...nel.org>, linux-kernel@...r.kernel.org,
        Prabhakar <prabhakar.csengg@...il.com>,
        linux-renesas-soc@...r.kernel.org,
        Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>,
        linux-stm32@...md-mailman.stormreply.com,
        linux-arm-kernel@...ts.infradead.org
Subject: [PATCH 05/13] media: stm32-dma2d: 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().

Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>
---
 drivers/media/platform/stm32/dma2d/dma2d.c | 9 +++------
 1 file changed, 3 insertions(+), 6 deletions(-)

diff --git a/drivers/media/platform/stm32/dma2d/dma2d.c b/drivers/media/platform/stm32/dma2d/dma2d.c
index 17af90d86898..9706aa41b5d2 100644
--- a/drivers/media/platform/stm32/dma2d/dma2d.c
+++ b/drivers/media/platform/stm32/dma2d/dma2d.c
@@ -633,14 +633,11 @@ static int dma2d_probe(struct platform_device *pdev)
 		goto put_clk_gate;
 	}
 
-	res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
-	if (!res) {
-		dev_err(&pdev->dev, "failed to find IRQ\n");
-		ret = -ENXIO;
+	ret = platform_get_irq(pdev, 0);
+	if (ret < 0)
 		goto unprep_clk_gate;
-	}
 
-	dev->irq = res->start;
+	dev->irq = ret;
 
 	ret = devm_request_irq(&pdev->dev, dev->irq, dma2d_isr,
 			       0, pdev->name, dev);
-- 
2.17.1