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Message-id: <000501ce55ea$cc10e2d0$6432a870$@samsung.com>
Date: Tue, 21 May 2013 15:16:57 +0900
From: Jingoo Han <jg1.han@...sung.com>
To: 'Andrew Morton' <akpm@...ux-foundation.org>
Cc: linux-kernel@...r.kernel.org,
'Alessandro Zummo' <a.zummo@...ertech.it>,
rtc-linux@...glegroups.com, Jingoo Han <jg1.han@...sung.com>
Subject: [PATCH 2/8] rtc: rtc-jz4740: use devm_*() functions
Use devm_*() functions to make cleanup paths simpler.
Signed-off-by: Jingoo Han <jg1.han@...sung.com>
---
drivers/rtc/rtc-jz4740.c | 65 ++++++++++++----------------------------------
1 file changed, 16 insertions(+), 49 deletions(-)
diff --git a/drivers/rtc/rtc-jz4740.c b/drivers/rtc/rtc-jz4740.c
index c6573585..1b126d2 100644
--- a/drivers/rtc/rtc-jz4740.c
+++ b/drivers/rtc/rtc-jz4740.c
@@ -14,6 +14,7 @@
*
*/
+#include <linux/io.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/platform_device.h>
@@ -216,37 +217,34 @@ static int jz4740_rtc_probe(struct platform_device *pdev)
struct jz4740_rtc *rtc;
uint32_t scratchpad;
- rtc = kzalloc(sizeof(*rtc), GFP_KERNEL);
+ rtc = devm_kzalloc(&pdev->dev, sizeof(*rtc), GFP_KERNEL);
if (!rtc)
return -ENOMEM;
rtc->irq = platform_get_irq(pdev, 0);
if (rtc->irq < 0) {
- ret = -ENOENT;
dev_err(&pdev->dev, "Failed to get platform irq\n");
- goto err_free;
+ return -ENOENT;
}
rtc->mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!rtc->mem) {
- ret = -ENOENT;
dev_err(&pdev->dev, "Failed to get platform mmio memory\n");
- goto err_free;
+ return -ENOENT;
}
- rtc->mem = request_mem_region(rtc->mem->start, resource_size(rtc->mem),
- pdev->name);
+ rtc->mem = devm_request_mem_region(&pdev->dev, rtc->mem->start,
+ resource_size(rtc->mem), pdev->name);
if (!rtc->mem) {
- ret = -EBUSY;
dev_err(&pdev->dev, "Failed to request mmio memory region\n");
- goto err_free;
+ return -EBUSY;
}
- rtc->base = ioremap_nocache(rtc->mem->start, resource_size(rtc->mem));
+ rtc->base = devm_ioremap_nocache(&pdev->dev, rtc->mem->start,
+ resource_size(rtc->mem));
if (!rtc->base) {
- ret = -EBUSY;
dev_err(&pdev->dev, "Failed to ioremap mmio memory\n");
- goto err_release_mem_region;
+ return -EBUSY;
}
spin_lock_init(&rtc->lock);
@@ -255,19 +253,19 @@ static int jz4740_rtc_probe(struct platform_device *pdev)
device_init_wakeup(&pdev->dev, 1);
- rtc->rtc = rtc_device_register(pdev->name, &pdev->dev, &jz4740_rtc_ops,
- THIS_MODULE);
+ rtc->rtc = devm_rtc_device_register(&pdev->dev, pdev->name,
+ &jz4740_rtc_ops, THIS_MODULE);
if (IS_ERR(rtc->rtc)) {
ret = PTR_ERR(rtc->rtc);
dev_err(&pdev->dev, "Failed to register rtc device: %d\n", ret);
- goto err_iounmap;
+ return ret;
}
- ret = request_irq(rtc->irq, jz4740_rtc_irq, 0,
+ ret = devm_request_irq(&pdev->dev, rtc->irq, jz4740_rtc_irq, 0,
pdev->name, rtc);
if (ret) {
dev_err(&pdev->dev, "Failed to request rtc irq: %d\n", ret);
- goto err_unregister_rtc;
+ return ret;
}
scratchpad = jz4740_rtc_reg_read(rtc, JZ_REG_RTC_SCRATCHPAD);
@@ -276,43 +274,13 @@ static int jz4740_rtc_probe(struct platform_device *pdev)
ret = jz4740_rtc_reg_write(rtc, JZ_REG_RTC_SEC, 0);
if (ret) {
dev_err(&pdev->dev, "Could not write write to RTC registers\n");
- goto err_free_irq;
+ return ret;
}
}
return 0;
-
-err_free_irq:
- free_irq(rtc->irq, rtc);
-err_unregister_rtc:
- rtc_device_unregister(rtc->rtc);
-err_iounmap:
- iounmap(rtc->base);
-err_release_mem_region:
- release_mem_region(rtc->mem->start, resource_size(rtc->mem));
-err_free:
- kfree(rtc);
-
- return ret;
}
-static int jz4740_rtc_remove(struct platform_device *pdev)
-{
- struct jz4740_rtc *rtc = platform_get_drvdata(pdev);
-
- free_irq(rtc->irq, rtc);
-
- rtc_device_unregister(rtc->rtc);
-
- iounmap(rtc->base);
- release_mem_region(rtc->mem->start, resource_size(rtc->mem));
-
- kfree(rtc);
-
- return 0;
-}
-
-
#ifdef CONFIG_PM
static int jz4740_rtc_suspend(struct device *dev)
{
@@ -344,7 +312,6 @@ static const struct dev_pm_ops jz4740_pm_ops = {
static struct platform_driver jz4740_rtc_driver = {
.probe = jz4740_rtc_probe,
- .remove = jz4740_rtc_remove,
.driver = {
.name = "jz4740-rtc",
.owner = THIS_MODULE,
--
1.7.10.4
--
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