From da4286445670b68f4e52447ee1784bb3262b2f15 Mon Sep 17 00:00:00 2001
From: zhaoxiao <zhaoxiao@uniontech.com>
Date: Fri, 11 Feb 2022 11:27:55 +0800
Subject: video: fbdev: s3c-fb: Use platform_get_irq() to get the interrupt
Git-commit: 4f37ea5d0e7c6ec65aa523db0ccd4ab9e52cb2e7
Patch-mainline: v5.18-rc1
References: jsc#PED-1166 jsc#PED-1168 jsc#PED-1170 jsc#PED-1218 jsc#PED-1220 jsc#PED-1222 jsc#PED-1223 jsc#PED-1225

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 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().

Signed-off-by: zhaoxiao <zhaoxiao@uniontech.com>
Signed-off-by: Helge Deller <deller@gmx.de>
Acked-by: Patrik Jakobsson <pjakobsson@suse.de>
---
 drivers/video/fbdev/s3c-fb.c | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

diff --git a/drivers/video/fbdev/s3c-fb.c b/drivers/video/fbdev/s3c-fb.c
index 55889fe71210..576b0d9b8803 100644
--- a/drivers/video/fbdev/s3c-fb.c
+++ b/drivers/video/fbdev/s3c-fb.c
@@ -1360,7 +1360,6 @@ static int s3c_fb_probe(struct platform_device *pdev)
 	struct device *dev = &pdev->dev;
 	struct s3c_fb_platdata *pd;
 	struct s3c_fb *sfb;
-	struct resource *res;
 	int win;
 	int ret = 0;
 	u32 reg;
@@ -1417,13 +1416,13 @@ static int s3c_fb_probe(struct platform_device *pdev)
 		goto err_lcd_clk;
 	}
 
-	res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
-	if (!res) {
+	sfb->irq_no = platform_get_irq(pdev, 0);
+	if (sfb->irq_no < 0) {
 		dev_err(dev, "failed to acquire irq resource\n");
 		ret = -ENOENT;
 		goto err_lcd_clk;
 	}
-	sfb->irq_no = res->start;
+
 	ret = devm_request_irq(dev, sfb->irq_no, s3c_fb_irq,
 			  0, "s3c_fb", sfb);
 	if (ret) {
-- 
2.38.1