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drivers/rtc/rtc-s3c.c: convert s3c_rtc to dev_pm_ops

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Instead of using legacy suspend/resume methods, using newer dev_pm_ops
structure allows better control over power management.  Also, 'wake_en'
variable is moved, because it is only used when CONFIG_PM_SLEEP is
enabled.

Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Cc: Grant Likely <grant.likely@secretlab.ca>
Cc: Rob Herring <rob.herring@calxeda.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Jingoo Han 2013-04-29 16:19:27 -07:00 committed by Linus Torvalds
parent bc48b9023b
commit 32e445aab4
1 changed files with 13 additions and 13 deletions
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26
drivers/rtc/rtc-s3c.c
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@ -51,7 +51,6 @@ static struct clk *rtc_clk;
static void __iomem *s3c_rtc_base; static void __iomem *s3c_rtc_base;
static int s3c_rtc_alarmno = NO_IRQ; static int s3c_rtc_alarmno = NO_IRQ;
static int s3c_rtc_tickno = NO_IRQ; static int s3c_rtc_tickno = NO_IRQ;
static bool wake_en;
static enum s3c_cpu_type s3c_rtc_cpu_type; static enum s3c_cpu_type s3c_rtc_cpu_type;
static DEFINE_SPINLOCK(s3c_rtc_pie_lock); static DEFINE_SPINLOCK(s3c_rtc_pie_lock);
@ -579,14 +578,16 @@ static int s3c_rtc_probe(struct platform_device *pdev)
return ret; return ret;
} }
#ifdef CONFIG_PM #ifdef CONFIG_PM_SLEEP
/* RTC Power management control */ /* RTC Power management control */
static int ticnt_save, ticnt_en_save; static int ticnt_save, ticnt_en_save;
static bool wake_en;
static int s3c_rtc_suspend(struct platform_device *pdev, pm_message_t state) static int s3c_rtc_suspend(struct device *dev)
{ {
struct platform_device *pdev = to_platform_device(dev);
clk_enable(rtc_clk); clk_enable(rtc_clk);
/* save TICNT for anyone using periodic interrupts */ /* save TICNT for anyone using periodic interrupts */
ticnt_save = readb(s3c_rtc_base + S3C2410_TICNT); ticnt_save = readb(s3c_rtc_base + S3C2410_TICNT);
@ -596,19 +597,20 @@ static int s3c_rtc_suspend(struct platform_device *pdev, pm_message_t state)
} }
s3c_rtc_enable(pdev, 0); s3c_rtc_enable(pdev, 0);
if (device_may_wakeup(&pdev->dev) && !wake_en) { if (device_may_wakeup(dev) && !wake_en) {
if (enable_irq_wake(s3c_rtc_alarmno) == 0) if (enable_irq_wake(s3c_rtc_alarmno) == 0)
wake_en = true; wake_en = true;
else else
dev_err(&pdev->dev, "enable_irq_wake failed\n"); dev_err(dev, "enable_irq_wake failed\n");
} }
clk_disable(rtc_clk); clk_disable(rtc_clk);
return 0; return 0;
} }
static int s3c_rtc_resume(struct platform_device *pdev) static int s3c_rtc_resume(struct device *dev)
{ {
struct platform_device *pdev = to_platform_device(dev);
unsigned int tmp; unsigned int tmp;
clk_enable(rtc_clk); clk_enable(rtc_clk);
@ -619,7 +621,7 @@ static int s3c_rtc_resume(struct platform_device *pdev)
writew(tmp | ticnt_en_save, s3c_rtc_base + S3C2410_RTCCON); writew(tmp | ticnt_en_save, s3c_rtc_base + S3C2410_RTCCON);
} }
if (device_may_wakeup(&pdev->dev) && wake_en) { if (device_may_wakeup(dev) && wake_en) {
disable_irq_wake(s3c_rtc_alarmno); disable_irq_wake(s3c_rtc_alarmno);
wake_en = false; wake_en = false;
} }
@ -627,11 +629,10 @@ static int s3c_rtc_resume(struct platform_device *pdev)
return 0; return 0;
} }
#else
#define s3c_rtc_suspend NULL
#define s3c_rtc_resume NULL
#endif #endif
static SIMPLE_DEV_PM_OPS(s3c_rtc_pm_ops, s3c_rtc_suspend, s3c_rtc_resume);
#ifdef CONFIG_OF #ifdef CONFIG_OF
static struct s3c_rtc_drv_data s3c_rtc_drv_data_array[] = { static struct s3c_rtc_drv_data s3c_rtc_drv_data_array[] = {
[TYPE_S3C2410] = { TYPE_S3C2410 }, [TYPE_S3C2410] = { TYPE_S3C2410 },
@ -681,12 +682,11 @@ MODULE_DEVICE_TABLE(platform, s3c_rtc_driver_ids);
static struct platform_driver s3c_rtc_driver = { static struct platform_driver s3c_rtc_driver = {
.probe = s3c_rtc_probe, .probe = s3c_rtc_probe,
.remove = s3c_rtc_remove, .remove = s3c_rtc_remove,
.suspend = s3c_rtc_suspend,
.resume = s3c_rtc_resume,
.id_table = s3c_rtc_driver_ids, .id_table = s3c_rtc_driver_ids,
.driver = { .driver = {
.name = "s3c-rtc", .name = "s3c-rtc",
.owner = THIS_MODULE, .owner = THIS_MODULE,
.pm = &s3c_rtc_pm_ops,
.of_match_table = of_match_ptr(s3c_rtc_dt_match), .of_match_table = of_match_ptr(s3c_rtc_dt_match),
}, },
}; };