From: Pramod Gurav <pramod.gurav@smartplayin.com>
Date: Wed, 1 Oct 2014 10:46:33 +0000 (+0530)
Subject: gpio: cs5535: Switch to using managed resources with devm_
X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=3eebd61322835565bbcb1745bf9bd44e86ff80ca;p=openwrt%2Fstaging%2Fblogic.git

gpio: cs5535: Switch to using managed resources with devm_

This change switches to devm_request_region to request region
and hence simplifies the module unload and does away with
release_region in remove function.

Cc: linux-gpio@vger.kernel.org
Signed-off-by: Pramod Gurav <pramod.gurav@smartplayin.com>
Reviewed-by: Alexandre Courbot <acourbot@nvidia.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
---

diff --git a/drivers/gpio/gpio-cs5535.c b/drivers/gpio/gpio-cs5535.c
index 668127fe90ef..71484eeb4ac2 100644
--- a/drivers/gpio/gpio-cs5535.c
+++ b/drivers/gpio/gpio-cs5535.c
@@ -322,7 +322,8 @@ static int cs5535_gpio_probe(struct platform_device *pdev)
 		goto done;
 	}
 
-	if (!request_region(res->start, resource_size(res), pdev->name)) {
+	if (!devm_request_region(&pdev->dev, res->start, resource_size(res),
+				 pdev->name)) {
 		dev_err(&pdev->dev, "can't request region\n");
 		goto done;
 	}
@@ -348,24 +349,18 @@ static int cs5535_gpio_probe(struct platform_device *pdev)
 	/* finally, register with the generic GPIO API */
 	err = gpiochip_add(&cs5535_gpio_chip.chip);
 	if (err)
-		goto release_region;
+		goto done;
 
 	return 0;
 
-release_region:
-	release_region(res->start, resource_size(res));
 done:
 	return err;
 }
 
 static int cs5535_gpio_remove(struct platform_device *pdev)
 {
-	struct resource *r;
-
 	gpiochip_remove(&cs5535_gpio_chip.chip);
 
-	r = platform_get_resource(pdev, IORESOURCE_IO, 0);
-	release_region(r->start, resource_size(r));
 	return 0;
 }