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path: root/drivers/rtc/rtc-coh901331.c
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Diffstat (limited to 'drivers/rtc/rtc-coh901331.c')
-rw-r--r--drivers/rtc/rtc-coh901331.c61
1 files changed, 23 insertions, 38 deletions
diff --git a/drivers/rtc/rtc-coh901331.c b/drivers/rtc/rtc-coh901331.c
index a5b8a0c..76b2156 100644
--- a/drivers/rtc/rtc-coh901331.c
+++ b/drivers/rtc/rtc-coh901331.c
@@ -155,13 +155,10 @@ static int __exit coh901331_remove(struct platform_device *pdev)
struct coh901331_port *rtap = dev_get_drvdata(&pdev->dev);
if (rtap) {
- free_irq(rtap->irq, rtap);
rtc_device_unregister(rtap->rtc);
+ clk_unprepare(rtap->clk);
clk_put(rtap->clk);
- iounmap(rtap->virtbase);
- release_mem_region(rtap->phybase, rtap->physize);
platform_set_drvdata(pdev, NULL);
- kfree(rtap);
}
return 0;
@@ -174,49 +171,43 @@ static int __init coh901331_probe(struct platform_device *pdev)
struct coh901331_port *rtap;
struct resource *res;
- rtap = kzalloc(sizeof(struct coh901331_port), GFP_KERNEL);
+ rtap = devm_kzalloc(&pdev->dev,
+ sizeof(struct coh901331_port), GFP_KERNEL);
if (!rtap)
return -ENOMEM;
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- if (!res) {
- ret = -ENOENT;
- goto out_no_resource;
- }
+ if (!res)
+ return -ENOENT;
+
rtap->phybase = res->start;
rtap->physize = resource_size(res);
- if (request_mem_region(rtap->phybase, rtap->physize,
- "rtc-coh901331") == NULL) {
- ret = -EBUSY;
- goto out_no_memregion;
- }
+ if (devm_request_mem_region(&pdev->dev, rtap->phybase, rtap->physize,
+ "rtc-coh901331") == NULL)
+ return -EBUSY;
- rtap->virtbase = ioremap(rtap->phybase, rtap->physize);
- if (!rtap->virtbase) {
- ret = -ENOMEM;
- goto out_no_remap;
- }
+ rtap->virtbase = devm_ioremap(&pdev->dev, rtap->phybase, rtap->physize);
+ if (!rtap->virtbase)
+ return -ENOMEM;
rtap->irq = platform_get_irq(pdev, 0);
- if (request_irq(rtap->irq, coh901331_interrupt, 0,
- "RTC COH 901 331 Alarm", rtap)) {
- ret = -EIO;
- goto out_no_irq;
- }
+ if (devm_request_irq(&pdev->dev, rtap->irq, coh901331_interrupt, 0,
+ "RTC COH 901 331 Alarm", rtap))
+ return -EIO;
rtap->clk = clk_get(&pdev->dev, NULL);
if (IS_ERR(rtap->clk)) {
ret = PTR_ERR(rtap->clk);
dev_err(&pdev->dev, "could not get clock\n");
- goto out_no_clk;
+ return ret;
}
/* We enable/disable the clock only to assure it works */
- ret = clk_enable(rtap->clk);
+ ret = clk_prepare_enable(rtap->clk);
if (ret) {
dev_err(&pdev->dev, "could not enable clock\n");
- goto out_no_clk_enable;
+ goto out_no_clk_prepenable;
}
clk_disable(rtap->clk);
@@ -232,18 +223,9 @@ static int __init coh901331_probe(struct platform_device *pdev)
out_no_rtc:
platform_set_drvdata(pdev, NULL);
- out_no_clk_enable:
+ clk_unprepare(rtap->clk);
+ out_no_clk_prepenable:
clk_put(rtap->clk);
- out_no_clk:
- free_irq(rtap->irq, rtap);
- out_no_irq:
- iounmap(rtap->virtbase);
- out_no_remap:
- platform_set_drvdata(pdev, NULL);
- out_no_memregion:
- release_mem_region(rtap->phybase, SZ_4K);
- out_no_resource:
- kfree(rtap);
return ret;
}
@@ -265,6 +247,7 @@ static int coh901331_suspend(struct platform_device *pdev, pm_message_t state)
writel(0, rtap->virtbase + COH901331_IRQ_MASK);
clk_disable(rtap->clk);
}
+ clk_unprepare(rtap->clk);
return 0;
}
@@ -272,6 +255,7 @@ static int coh901331_resume(struct platform_device *pdev)
{
struct coh901331_port *rtap = dev_get_drvdata(&pdev->dev);
+ clk_prepare(rtap->clk);
if (device_may_wakeup(&pdev->dev)) {
disable_irq_wake(rtap->irq);
} else {
@@ -293,6 +277,7 @@ static void coh901331_shutdown(struct platform_device *pdev)
clk_enable(rtap->clk);
writel(0, rtap->virtbase + COH901331_IRQ_MASK);
clk_disable(rtap->clk);
+ clk_unprepare(rtap->clk);
}
static struct platform_driver coh901331_driver = {
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