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drivers/rtc/rtc-tps65910.c: enable/disable wake in suspend/resume

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Making the rtc driver as wakeup capabale and leaving the wake
enable/disable decision to user space through a sysfs attribute.

In suspend, enable wake if device wakeup enabled.  In resume disable wake
again.

This change is inline with the Documentation/power/devices.txt#
/sys/devices/.../power/wakeup files

Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
Cc: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Laxman Dewangan 2013-02-21 16:44:35 -08:00 committed by Linus Torvalds
parent 36d6182411
commit eb5eba4ef7
1 changed files with 11 additions and 1 deletions
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12
drivers/rtc/rtc-tps65910.c
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@ -27,6 +27,7 @@
struct tps65910_rtc { struct tps65910_rtc {
struct rtc_device *rtc; struct rtc_device *rtc;
int irq;
/* To store the list of enabled interrupts */ /* To store the list of enabled interrupts */
u32 irqstat; u32 irqstat;
}; };
@ -273,7 +274,8 @@ static int tps65910_rtc_probe(struct platform_device *pdev)
dev_err(&pdev->dev, "IRQ is not free.\n"); dev_err(&pdev->dev, "IRQ is not free.\n");
return ret; return ret;
} }
device_init_wakeup(&pdev->dev, 1); tps_rtc->irq = irq;
device_set_wakeup_capable(&pdev->dev, 1);
tps_rtc->rtc = rtc_device_register(pdev->name, &pdev->dev, tps_rtc->rtc = rtc_device_register(pdev->name, &pdev->dev,
&tps65910_rtc_ops, THIS_MODULE); &tps65910_rtc_ops, THIS_MODULE);
@ -308,9 +310,13 @@ static int tps65910_rtc_remove(struct platform_device *pdev)
static int tps65910_rtc_suspend(struct device *dev) static int tps65910_rtc_suspend(struct device *dev)
{ {
struct tps65910 *tps = dev_get_drvdata(dev->parent); struct tps65910 *tps = dev_get_drvdata(dev->parent);
struct tps65910_rtc *tps_rtc = dev_get_drvdata(dev);
u8 alarm = TPS65910_RTC_INTERRUPTS_IT_ALARM; u8 alarm = TPS65910_RTC_INTERRUPTS_IT_ALARM;
int ret; int ret;
if (device_may_wakeup(dev))
enable_irq_wake(tps_rtc->irq);
/* Store current list of enabled interrupts*/ /* Store current list of enabled interrupts*/
ret = regmap_read(tps->regmap, TPS65910_RTC_INTERRUPTS, ret = regmap_read(tps->regmap, TPS65910_RTC_INTERRUPTS,
&tps->rtc->irqstat); &tps->rtc->irqstat);
@ -324,6 +330,10 @@ static int tps65910_rtc_suspend(struct device *dev)
static int tps65910_rtc_resume(struct device *dev) static int tps65910_rtc_resume(struct device *dev)
{ {
struct tps65910 *tps = dev_get_drvdata(dev->parent); struct tps65910 *tps = dev_get_drvdata(dev->parent);
struct tps65910_rtc *tps_rtc = dev_get_drvdata(dev);
if (device_may_wakeup(dev))
disable_irq_wake(tps_rtc->irq);
/* Restore list of enabled interrupts before suspend */ /* Restore list of enabled interrupts before suspend */
return regmap_write(tps->regmap, TPS65910_RTC_INTERRUPTS, return regmap_write(tps->regmap, TPS65910_RTC_INTERRUPTS,