From:   Rob Herring <robh@kernel.org>
To:     Russell King <linux@armlinux.org.uk>, Helge Deller <deller@gmx.de>
Cc:     linux-fbdev@vger.kernel.org, dri-devel@lists.freedesktop.org,
        linux-kernel@vger.kernel.org
Subject: [PATCH] video: ARM CLCD: Use of_address_to_resource()
Date:   Sun, 19 Mar 2023 11:32:41 -0500
Message-Id: <20230319163241.226984-1-robh@kernel.org>
MIME-Version: 1.0
Content-Transfer-Encoding: 8bit
Precedence: bulk

Replace of_get_address() and of_translate_address() with single call
to of_address_to_resource(). With this, use ioremap() instead of
of_iomap() which would parse "reg" a second time.

Signed-off-by: Rob Herring <robh@kernel.org>
---
 drivers/video/fbdev/amba-clcd.c | 24 +++++++++++++-----------
 1 file changed, 13 insertions(+), 11 deletions(-)

diff --git a/drivers/video/fbdev/amba-clcd.c b/drivers/video/fbdev/amba-clcd.c
index f65c96d1394d..1289bfe6e872 100644
--- a/drivers/video/fbdev/amba-clcd.c
+++ b/drivers/video/fbdev/amba-clcd.c
@@ -759,7 +759,7 @@ static int clcdfb_of_vram_setup(struct clcd_fb *fb)
 {
 	int err;
 	struct device_node *memory;
-	u64 size;
+	struct resource res;
 
 	err = clcdfb_of_init_display(fb);
 	if (err)
@@ -769,18 +769,20 @@ static int clcdfb_of_vram_setup(struct clcd_fb *fb)
 	if (!memory)
 		return -ENODEV;
 
-	fb->fb.screen_base = of_iomap(memory, 0);
-	if (!fb->fb.screen_base) {
-		of_node_put(memory);
-		return -ENOMEM;
-	}
 
-	fb->fb.fix.smem_start = of_translate_address(memory,
-			of_get_address(memory, 0, &size, NULL));
-	fb->fb.fix.smem_len = size;
-	of_node_put(memory);
+	err = of_address_to_resource(memory, 0, &res);
+	if (err)
+		goto out;
 
-	return 0;
+	fb->fb.screen_base = ioremap(res.start, resource_size(&res));
+	if (!fb->fb.screen_base)
+		goto out;
+
+	fb->fb.fix.smem_start = res.start;
+	fb->fb.fix.smem_len = resource_size(&res);
+out:
+	of_node_put(memory);
+	return err;
 }
 
 static int clcdfb_of_vram_mmap(struct clcd_fb *fb, struct vm_area_struct *vma)
-- 
2.39.2