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watchdog: davinci_wdt: update to devm_* API

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Update the code to use devm_* API so that driver
core will manage resources.

Signed-off-by: Kumar, Anil <anilkumar.v@ti.com>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
This commit is contained in:
Kumar, Anil 2013-02-08 13:09:30 +05:30 committed by Wim Van Sebroeck
parent 362ce5aeeb
commit e20880e60f
1 changed files with 5 additions and 21 deletions
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26
drivers/watchdog/davinci_wdt.c
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@ -69,7 +69,6 @@ static unsigned long wdt_status;
#define WDT_REGION_INITED 2
#define WDT_DEVICE_INITED 3
static struct resource *wdt_mem;
static void __iomem *wdt_base;
struct clk *wdt_clk;
@ -201,8 +200,9 @@ static struct miscdevice davinci_wdt_miscdev = {
static int davinci_wdt_probe(struct platform_device *pdev)
{
int ret = 0, size;
int ret = 0;
struct device *dev = &pdev->dev;
struct resource *wdt_mem;
wdt_clk = devm_clk_get(dev, NULL);
if (WARN_ON(IS_ERR(wdt_clk)))
@ -221,41 +221,25 @@ static int davinci_wdt_probe(struct platform_device *pdev)
return -ENOENT;
}
size = resource_size(wdt_mem);
if (!request_mem_region(wdt_mem->start, size, pdev->name)) {
dev_err(dev, "failed to get memory region\n");
return -ENOENT;
}
wdt_base = ioremap(wdt_mem->start, size);
wdt_base = devm_request_and_ioremap(dev, wdt_mem);
if (!wdt_base) {
dev_err(dev, "failed to map memory region\n");
release_mem_region(wdt_mem->start, size);
wdt_mem = NULL;
return -ENOMEM;
dev_err(dev, "ioremap failed\n");
return -EADDRNOTAVAIL;
}
ret = misc_register(&davinci_wdt_miscdev);
if (ret < 0) {
dev_err(dev, "cannot register misc device\n");
release_mem_region(wdt_mem->start, size);
wdt_mem = NULL;
} else {
set_bit(WDT_DEVICE_INITED, &wdt_status);
}
iounmap(wdt_base);
return ret;
}
static int davinci_wdt_remove(struct platform_device *pdev)
{
misc_deregister(&davinci_wdt_miscdev);
if (wdt_mem) {
release_mem_region(wdt_mem->start, resource_size(wdt_mem));
wdt_mem = NULL;
}
clk_disable_unprepare(wdt_clk);
return 0;