linux-kernel - [PATCH v3 1/5] i2c: i2c-davinci: switch to use platform_get

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Date:	Mon, 1 Dec 2014 17:34:03 +0200
From:	Grygorii Strashko <grygorii.strashko@...com>
To:	Wolfram Sang <wsa@...-dreams.de>, Sekhar Nori <nsekhar@...com>,
	Uwe Kleine-König 
	<u.kleine-koenig@...gutronix.de>
CC:	<linux-i2c@...r.kernel.org>,
	<linux-arm-kernel@...ts.infradead.org>,
	<linux-kernel@...r.kernel.org>,
	Grygorii Strashko <grygorii.strashko@...com>,
	Kevin Hilman <khilman@...prootsystems.com>,
	Santosh Shilimkar <ssantosh@...nel.org>,
	Murali Karicheri <m-karicheri2@...com>
Subject: [PATCH v3 1/5] i2c: i2c-davinci: switch to use platform_get_irq

Switch Davinci I2C driver to use platform_get_irq(), because
it is not recommened to use platform_get_resource(pdev, IORESOURCE_IRQ, ..)
for requesting IRQ resources any more, as they can be not ready yet
in case of DT-boot.

CC: Sekhar Nori <nsekhar@...com>
CC: Kevin Hilman <khilman@...prootsystems.com>
CC: Santosh Shilimkar <ssantosh@...nel.org>
CC: Murali Karicheri <m-karicheri2@...com>
Acked-by: Uwe Kleine-König <u.kleine-koenig@...gutronix.de>
Signed-off-by: Grygorii Strashko <grygorii.strashko@...com>
---
 drivers/i2c/busses/i2c-davinci.c | 20 ++++++++++++--------
 1 file changed, 12 insertions(+), 8 deletions(-)

diff --git a/drivers/i2c/busses/i2c-davinci.c b/drivers/i2c/busses/i2c-davinci.c
index 4d96147..25e8e25 100644
--- a/drivers/i2c/busses/i2c-davinci.c
+++ b/drivers/i2c/busses/i2c-davinci.c
@@ -640,13 +640,17 @@ static int davinci_i2c_probe(struct platform_device *pdev)
 {
 	struct davinci_i2c_dev *dev;
 	struct i2c_adapter *adap;
-	struct resource *mem, *irq;
-	int r;
-
-	irq = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
-	if (!irq) {
-		dev_err(&pdev->dev, "no irq resource?\n");
-		return -ENODEV;
+	struct resource *mem;
+	int r, irq;
+
+	irq = platform_get_irq(pdev, 0);
+	if (irq <= 0) {
+		if (!irq)
+			irq = -ENXIO;
+		if (irq != -EPROBE_DEFER)
+			dev_err(&pdev->dev,
+				"can't get irq resource ret=%d\n", irq);
+		return irq;
 	}
 
 	dev = devm_kzalloc(&pdev->dev, sizeof(struct davinci_i2c_dev),
@@ -661,7 +665,7 @@ static int davinci_i2c_probe(struct platform_device *pdev)
 	init_completion(&dev->xfr_complete);
 #endif
 	dev->dev = &pdev->dev;
-	dev->irq = irq->start;
+	dev->irq = irq;
 	dev->pdata = dev_get_platdata(&pdev->dev);
 	platform_set_drvdata(pdev, dev);
 
-- 
1.9.1

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