[PATCHv2] mtd: rawnand: fsl_ifc: use devm_platform_get_and_ioremap_resource

[Rosen Penev]

Replace the manual of_address_to_resource(), ioremap(), and iounmap()
in the probe/remove paths with devm_platform_get_and_ioremap_resource()
so the resource is managed and released automatically on probe failure
and driver removal.

Assisted-by: opencode:big-pickle
Signed-off-by: Rosen Penev <rosenp at gmail.com>
---
 v2: rebase and remove now unused header.
 drivers/mtd/nand/raw/fsl_ifc_nand.c | 30 +++++++++--------------------
 1 file changed, 9 insertions(+), 21 deletions(-)

diff --git a/drivers/mtd/nand/raw/fsl_ifc_nand.c b/drivers/mtd/nand/raw/fsl_ifc_nand.c
index 4c2d95461c2e..469b233db73e 100644
--- a/drivers/mtd/nand/raw/fsl_ifc_nand.c
+++ b/drivers/mtd/nand/raw/fsl_ifc_nand.c
@@ -12,7 +12,6 @@
 #include <linux/platform_device.h>
 #include <linux/types.h>
 #include <linux/kernel.h>
-#include <linux/of_address.h>
 #include <linux/slab.h>
 #include <linux/mtd/mtd.h>
 #include <linux/mtd/rawnand.h>
@@ -968,9 +967,6 @@ static int fsl_ifc_chip_remove(struct fsl_ifc_mtd *priv)
 
 	kfree(mtd->name);
 
-	if (priv->vbase)
-		iounmap(priv->vbase);
-
 	ifc_nand_ctrl->chips[priv->bank] = NULL;
 
 	return 0;
@@ -995,12 +991,12 @@ static int fsl_ifc_nand_probe(struct platform_device *dev)
 {
 	struct fsl_ifc_runtime __iomem *ifc;
 	struct fsl_ifc_mtd *priv;
-	struct resource res;
+	struct resource *res;
+	void __iomem *vbase;
 	static const char *part_probe_types[]
 		= { "cmdlinepart", "RedBoot", "ofpart", NULL };
 	int ret;
 	int bank;
-	struct device_node *node = dev->dev.of_node;
 	struct mtd_info *mtd;
 
 	if (!fsl_ifc_ctrl_dev || !fsl_ifc_ctrl_dev->rregs)
@@ -1008,15 +1004,13 @@ static int fsl_ifc_nand_probe(struct platform_device *dev)
 	ifc = fsl_ifc_ctrl_dev->rregs;
 
 	/* get, allocate and map the memory resource */
-	ret = of_address_to_resource(node, 0, &res);
-	if (ret) {
-		dev_err(&dev->dev, "%s: failed to get resource\n", __func__);
-		return ret;
-	}
+	vbase = devm_platform_get_and_ioremap_resource(dev, 0, &res);
+	if (IS_ERR(vbase))
+		return PTR_ERR(vbase);
 
 	/* find which chip select it is connected to */
 	for (bank = 0; bank < fsl_ifc_ctrl_dev->banks; bank++) {
-		if (match_bank(fsl_ifc_ctrl_dev->gregs, bank, res.start))
+		if (match_bank(fsl_ifc_ctrl_dev->gregs, bank, res->start))
 			break;
 	}
 
@@ -1051,13 +1045,7 @@ static int fsl_ifc_nand_probe(struct platform_device *dev)
 	priv->bank = bank;
 	priv->ctrl = fsl_ifc_ctrl_dev;
 	priv->dev = &dev->dev;
-
-	priv->vbase = ioremap(res.start, resource_size(&res));
-	if (!priv->vbase) {
-		dev_err(priv->dev, "%s: failed to map chip region\n", __func__);
-		ret = -ENOMEM;
-		goto err;
-	}
+	priv->vbase = vbase;
 
 	dev_set_drvdata(priv->dev, priv);
 
@@ -1073,7 +1061,7 @@ static int fsl_ifc_nand_probe(struct platform_device *dev)
 		  &ifc->ifc_nand.nand_evter_intr_en);
 
 	mtd = nand_to_mtd(&priv->chip);
-	mtd->name = kasprintf(GFP_KERNEL, "%llx.flash", (u64)res.start);
+	mtd->name = kasprintf(GFP_KERNEL, "%llx.flash", (u64)res->start);
 	if (!mtd->name) {
 		ret = -ENOMEM;
 		goto err;
@@ -1095,7 +1083,7 @@ static int fsl_ifc_nand_probe(struct platform_device *dev)
 		goto cleanup_nand;
 
 	dev_info(priv->dev, "IFC NAND device at 0x%llx, bank %d\n",
-		 (unsigned long long)res.start, priv->bank);
+		 (unsigned long long)res->start, priv->bank);
 
 	return 0;
 
-- 
2.55.0