linux-kernel - [PATCH -next] iio: adc: stm32-dfsdm: Use devm_platform_get_and_ioremap

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Date:   Fri, 18 Sep 2020 16:31:42 +0800
From:   Wang ShaoBo <bobo.shaobowang@...wei.com>
To:     unlisted-recipients:; (no To-header on input)
CC:     <cj.chengjian@...wei.com>, <huawei.libin@...wei.com>,
        <Jonathan.Cameron@...wei.com>, <fabrice.gasnier@...com>,
        <linux-iio@...r.kernel.org>,
        <linux-stm32@...md-mailman.stormreply.com>,
        <linux-kernel@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>
Subject: [PATCH -next] iio: adc: stm32-dfsdm: Use devm_platform_get_and_ioremap_resource()

Make use of devm_platform_get_and_ioremap_resource() provided by
driver core platform instead of duplicated analogue, dev_err() is
removed because it has been done in devm_ioremap_resource().

Signed-off-by: Wang ShaoBo <bobo.shaobowang@...wei.com>
---
 drivers/iio/adc/stm32-dfsdm-core.c | 11 ++++-------
 1 file changed, 4 insertions(+), 7 deletions(-)

diff --git a/drivers/iio/adc/stm32-dfsdm-core.c b/drivers/iio/adc/stm32-dfsdm-core.c
index 0b8bea88b011..42a7377704a4 100644
--- a/drivers/iio/adc/stm32-dfsdm-core.c
+++ b/drivers/iio/adc/stm32-dfsdm-core.c
@@ -226,16 +226,13 @@ static int stm32_dfsdm_parse_of(struct platform_device *pdev,
 	if (!node)
 		return -EINVAL;
 
-	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	if (!res) {
-		dev_err(&pdev->dev, "Failed to get memory resource\n");
-		return -ENODEV;
-	}
-	priv->dfsdm.phys_base = res->start;
-	priv->dfsdm.base = devm_ioremap_resource(&pdev->dev, res);
+	priv->dfsdm.base = devm_platform_get_and_ioremap_resource(pdev, 0,
+							&res);
 	if (IS_ERR(priv->dfsdm.base))
 		return PTR_ERR(priv->dfsdm.base);
 
+	priv->dfsdm.phys_base = res->start;
+
 	/*
 	 * "dfsdm" clock is mandatory for DFSDM peripheral clocking.
 	 * "dfsdm" or "audio" clocks can be used as source clock for
-- 
2.17.1