jz4740-battery: Use devm_request_and_ioremap

No functional changes. Just a cleanup.
Signed-off-by: Marcos Paulo de Souza <marcos.souza.org@gmail.com>
Acked-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Anton Vorontsov <anton.vorontsov@linaro.org>

drivers/power/jz4740-battery.c

@@ -33,7 +33,6 @@ struct jz_battery {
 	struct jz_battery_platform_data *pdata;
 	struct platform_device *pdev;
 
-	struct resource *mem;
 	void __iomem *base;
 
 	int irq;
@@ -244,6 +243,7 @@ static int __devinit jz_battery_probe(struct platform_device *pdev)
 	struct jz_battery_platform_data *pdata = pdev->dev.parent->platform_data;
 	struct jz_battery *jz_battery;
 	struct power_supply *battery;
+	struct resource *mem;
 
 	if (!pdata) {
 		dev_err(&pdev->dev, "No platform_data supplied\n");
@@ -264,26 +264,11 @@ static int __devinit jz_battery_probe(struct platform_device *pdev)
 		return jz_battery->irq;
 	}
 
-	jz_battery->mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	if (!jz_battery->mem) {
-		dev_err(&pdev->dev, "Failed to get platform mmio resource\n");
-		return -ENOENT;
-	}
+	mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 
-	jz_battery->mem = request_mem_region(jz_battery->mem->start,
-				resource_size(jz_battery->mem),	pdev->name);
-	if (!jz_battery->mem) {
-		dev_err(&pdev->dev, "Failed to request mmio memory region\n");
+	jz_battery->base = devm_request_and_ioremap(&pdev->dev, mem);
+	if (!jz_battery->base)
 		return -EBUSY;
-	}
-
-	jz_battery->base = ioremap_nocache(jz_battery->mem->start,
-				resource_size(jz_battery->mem));
-	if (!jz_battery->base) {
-		ret = -EBUSY;
-		dev_err(&pdev->dev, "Failed to ioremap mmio memory\n");
-		goto err_release_mem_region;
-	}
 
 	battery = &jz_battery->battery;
 	battery->name = pdata->info.name;
@@ -306,7 +291,7 @@ static int __devinit jz_battery_probe(struct platform_device *pdev)
 			jz_battery);
 	if (ret) {
 		dev_err(&pdev->dev, "Failed to request irq %d\n", ret);
-		goto err_iounmap;
+		goto err;
 	}
 	disable_irq(jz_battery->irq);
 
@@ -363,11 +348,8 @@ static int __devinit jz_battery_probe(struct platform_device *pdev)
 		gpio_free(jz_battery->pdata->gpio_charge);
 err_free_irq:
 	free_irq(jz_battery->irq, jz_battery);
-err_iounmap:
+err:
 	platform_set_drvdata(pdev, NULL);
-	iounmap(jz_battery->base);
-err_release_mem_region:
-	release_mem_region(jz_battery->mem->start, resource_size(jz_battery->mem));
 	return ret;
 }
 
@@ -387,9 +369,6 @@ static int __devexit jz_battery_remove(struct platform_device *pdev)
 
 	free_irq(jz_battery->irq, jz_battery);
 
-	iounmap(jz_battery->base);
-	release_mem_region(jz_battery->mem->start, resource_size(jz_battery->mem));
-
 	return 0;
 }