linux-kernel - [PATCH 10/13] rtc: avoid to use hardcoding irq number in max8925

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Message-Id: <1302706264-25815-11-git-send-email-haojian.zhuang@marvell.com>
Date:	Wed, 13 Apr 2011 22:51:01 +0800
From:	Haojian Zhuang <haojian.zhuang@...vell.com>
To:	sameo@...ux.intel.com, haojian.zhuang@...il.com,
	linux-kernel@...r.kernel.org
Cc:	Haojian Zhuang <haojian.zhuang@...vell.com>,
	Alessandro Zummo <a.zummo@...ertech.it>
Subject: [PATCH 10/13] rtc: avoid to use hardcoding irq number in max8925

Avoid to use hardcoding irq number in max8925 rtc driver. Use irq number
from resources instead.

Signed-off-by: Haojian Zhuang <haojian.zhuang@...vell.com>
Cc: Alessandro Zummo <a.zummo@...ertech.it>
---
 drivers/rtc/rtc-max8925.c |   22 +++++++++++++---------
 1 files changed, 13 insertions(+), 9 deletions(-)

diff --git a/drivers/rtc/rtc-max8925.c b/drivers/rtc/rtc-max8925.c
index 174036d..c460152 100644
--- a/drivers/rtc/rtc-max8925.c
+++ b/drivers/rtc/rtc-max8925.c
@@ -69,6 +69,7 @@ struct max8925_rtc_info {
 	struct max8925_chip	*chip;
 	struct i2c_client	*rtc;
 	struct device		*dev;
+	int			irq;
 };
 
 static irqreturn_t rtc_update_handler(int irq, void *data)
@@ -239,7 +240,7 @@ static int __devinit max8925_rtc_probe(struct platform_device *pdev)
 {
 	struct max8925_chip *chip = dev_get_drvdata(pdev->dev.parent);
 	struct max8925_rtc_info *info;
-	int irq, ret;
+	int ret = -EINVAL;
 
 	info = kzalloc(sizeof(struct max8925_rtc_info), GFP_KERNEL);
 	if (!info)
@@ -247,16 +248,22 @@ static int __devinit max8925_rtc_probe(struct platform_device *pdev)
 	info->chip = chip;
 	info->rtc = chip->rtc;
 	info->dev = &pdev->dev;
-	irq = chip->irq_base + MAX8925_IRQ_RTC_ALARM0;
+	info->irq = platform_get_irq(pdev, 0);
+	if (info->irq < 0) {
+		dev_err(chip->dev, "Failed to get IRQ resource\n");
+		goto out_irq;
+	}
 
-	ret = request_threaded_irq(irq, NULL, rtc_update_handler,
+	ret = request_threaded_irq(info->irq, NULL, rtc_update_handler,
 				   IRQF_ONESHOT, "rtc-alarm0", info);
 	if (ret < 0) {
 		dev_err(chip->dev, "Failed to request IRQ: #%d: %d\n",
-			irq, ret);
+			info->irq, ret);
 		goto out_irq;
 	}
 
+	dev_set_drvdata(&pdev->dev, info);
+	platform_set_drvdata(pdev, info);
 	info->rtc_dev = rtc_device_register("max8925-rtc", &pdev->dev,
 					&max8925_rtc_ops, THIS_MODULE);
 	ret = PTR_ERR(info->rtc_dev);
@@ -265,12 +272,9 @@ static int __devinit max8925_rtc_probe(struct platform_device *pdev)
 		goto out_rtc;
 	}
 
-	dev_set_drvdata(&pdev->dev, info);
-	platform_set_drvdata(pdev, info);
-
 	return 0;
 out_rtc:
-	free_irq(chip->irq_base + MAX8925_IRQ_RTC_ALARM0, info);
+	free_irq(info->irq, info);
 out_irq:
 	kfree(info);
 	return ret;
@@ -281,7 +285,7 @@ static int __devexit max8925_rtc_remove(struct platform_device *pdev)
 	struct max8925_rtc_info *info = platform_get_drvdata(pdev);
 
 	if (info) {
-		free_irq(info->chip->irq_base + MAX8925_IRQ_RTC_ALARM0, info);
+		free_irq(info->irq, info);
 		rtc_device_unregister(info->rtc_dev);
 		kfree(info);
 	}
-- 
1.5.6.5

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