--- zzzz-none-000/linux-3.10.107/drivers/mtd/nand/orion_nand.c	2017-06-27 09:49:32.000000000 +0000
+++ scorpion-7490-727/linux-3.10.107/drivers/mtd/nand/orion_nand.c	2021-02-04 17:41:59.000000000 +0000
@@ -19,7 +19,7 @@
 #include <linux/mtd/partitions.h>
 #include <linux/clk.h>
 #include <linux/err.h>
-#include <asm/io.h>
+#include <linux/io.h>
 #include <asm/sizes.h>
 #include <linux/platform_data/mtd-orion_nand.h>
 
@@ -85,35 +85,24 @@
 	int ret = 0;
 	u32 val = 0;
 
-	nc = kzalloc(sizeof(struct nand_chip) + sizeof(struct mtd_info), GFP_KERNEL);
-	if (!nc) {
-		printk(KERN_ERR "orion_nand: failed to allocate device structure.\n");
-		ret = -ENOMEM;
-		goto no_res;
-	}
+	nc = devm_kzalloc(&pdev->dev,
+			sizeof(struct nand_chip) + sizeof(struct mtd_info),
+			GFP_KERNEL);
+	if (!nc)
+		return -ENOMEM;
 	mtd = (struct mtd_info *)(nc + 1);
 
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	if (!res) {
-		ret = -ENODEV;
-		goto no_res;
-	}
+	io_base = devm_ioremap_resource(&pdev->dev, res);
 
-	io_base = ioremap(res->start, resource_size(res));
-	if (!io_base) {
-		printk(KERN_ERR "orion_nand: ioremap failed\n");
-		ret = -EIO;
-		goto no_res;
-	}
+	if (IS_ERR(io_base))
+		return PTR_ERR(io_base);
 
 	if (pdev->dev.of_node) {
 		board = devm_kzalloc(&pdev->dev, sizeof(struct orion_nand_data),
 					GFP_KERNEL);
-		if (!board) {
-			printk(KERN_ERR "orion_nand: failed to allocate board structure.\n");
-			ret = -ENOMEM;
-			goto no_res;
-		}
+		if (!board)
+			return -ENOMEM;
 		if (!of_property_read_u32(pdev->dev.of_node, "cle", &val))
 			board->cle = (u8)val;
 		else
@@ -130,11 +119,12 @@
 		if (!of_property_read_u32(pdev->dev.of_node,
 						"chip-delay", &val))
 			board->chip_delay = (u8)val;
-	} else
-		board = pdev->dev.platform_data;
+	} else {
+		board = dev_get_platdata(&pdev->dev);
+	}
 
 	mtd->priv = nc;
-	mtd->owner = THIS_MODULE;
+	mtd->dev.parent = &pdev->dev;
 
 	nc->priv = board;
 	nc->IO_ADDR_R = nc->IO_ADDR_W = io_base;
@@ -186,10 +176,6 @@
 		clk_disable_unprepare(clk);
 		clk_put(clk);
 	}
-	platform_set_drvdata(pdev, NULL);
-	iounmap(io_base);
-no_res:
-	kfree(nc);
 
 	return ret;
 }
@@ -197,15 +183,10 @@
 static int orion_nand_remove(struct platform_device *pdev)
 {
 	struct mtd_info *mtd = platform_get_drvdata(pdev);
-	struct nand_chip *nc = mtd->priv;
 	struct clk *clk;
 
 	nand_release(mtd);
 
-	iounmap(nc->IO_ADDR_W);
-
-	kfree(nc);
-
 	clk = clk_get(&pdev->dev, NULL);
 	if (!IS_ERR(clk)) {
 		clk_disable_unprepare(clk);
@@ -216,17 +197,17 @@
 }
 
 #ifdef CONFIG_OF
-static struct of_device_id orion_nand_of_match_table[] = {
+static const struct of_device_id orion_nand_of_match_table[] = {
 	{ .compatible = "marvell,orion-nand", },
 	{},
 };
+MODULE_DEVICE_TABLE(of, orion_nand_of_match_table);
 #endif
 
 static struct platform_driver orion_nand_driver = {
 	.remove		= orion_nand_remove,
 	.driver		= {
 		.name	= "orion_nand",
-		.owner	= THIS_MODULE,
 		.of_match_table = of_match_ptr(orion_nand_of_match_table),
 	},
 };