linux-kernel - [PATCH] rtc: r7301: Use devm_platform_ioremap_resource() in rtc7301_rtc

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Date:   Sat, 21 Sep 2019 13:49:12 +0200
From:   Markus Elfring <Markus.Elfring@....de>
To:     linux-rtc@...r.kernel.org, Akinobu Mita <akinobu.mita@...il.com>,
        Alessandro Zummo <a.zummo@...ertech.it>,
        Alexandre Belloni <alexandre.belloni@...tlin.com>
Cc:     LKML <linux-kernel@...r.kernel.org>,
        kernel-janitors@...r.kernel.org, Rob Herring <robh@...nel.org>
Subject: [PATCH] rtc: r7301: Use devm_platform_ioremap_resource() in
 rtc7301_rtc_probe()

From: Markus Elfring <elfring@...rs.sourceforge.net>
Date: Sat, 21 Sep 2019 13:43:07 +0200

Simplify this function implementation by using a known wrapper function.

This issue was detected by using the Coccinelle software.

Signed-off-by: Markus Elfring <elfring@...rs.sourceforge.net>
---
 drivers/rtc/rtc-r7301.c | 7 +------
 1 file changed, 1 insertion(+), 6 deletions(-)

diff --git a/drivers/rtc/rtc-r7301.c b/drivers/rtc/rtc-r7301.c
index 2498278853af..aaf1b95e3990 100644
--- a/drivers/rtc/rtc-r7301.c
+++ b/drivers/rtc/rtc-r7301.c
@@ -354,21 +354,16 @@ static void rtc7301_init(struct rtc7301_priv *priv)

 static int __init rtc7301_rtc_probe(struct platform_device *dev)
 {
-	struct resource *res;
 	void __iomem *regs;
 	struct rtc7301_priv *priv;
 	struct rtc_device *rtc;
 	int ret;

-	res = platform_get_resource(dev, IORESOURCE_MEM, 0);
-	if (!res)
-		return -ENODEV;
-
 	priv = devm_kzalloc(&dev->dev, sizeof(*priv), GFP_KERNEL);
 	if (!priv)
 		return -ENOMEM;

-	regs = devm_ioremap_resource(&dev->dev, res);
+	regs = devm_platform_ioremap_resource(dev, 0);
 	if (IS_ERR(regs))
 		return PTR_ERR(regs);

--
2.23.0