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drivers/rtc/rtc-jz4740.c: add alarm function

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Add the "alarm" function to the jz4740 RTC.  Interrupts will now be raised
when the "alarm" time is reached.

[akpm@linux-foundation.org: coding-style fixes]
Signed-off-by: Paul Cercueil <paul@crapouillou.net>
Cc: Wan ZongShun <mcuos.com@gmail.com>
Cc: Alessandro Zummo <a.zummo@towertech.it>
Cc: Lars-Peter Clausen <lars@metafoo.de>
Cc: Paul Gortmaker <p_gortmaker@yahoo.com>
Cc: Ralf Baechle <ralf@linux-mips.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Paul Cercueil 2010-10-27 15:33:12 -07:00 committed by Linus Torvalds
parent f46418c5ca
commit d0f744c8cb
1 changed files with 40 additions and 5 deletions
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37
drivers/rtc/rtc-jz4740.c
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@ -1,5 +1,6 @@
/*
* Copyright (C) 2009-2010, Lars-Peter Clausen <lars@metafoo.de>
* Copyright (C) 2010, Paul Cercueil <paul@crapouillou.net>
* JZ4740 SoC RTC driver
*
* This program is free software; you can redistribute it and/or modify it
@ -161,7 +162,8 @@ static int jz4740_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alrm)
ret = jz4740_rtc_reg_write(rtc, JZ_REG_RTC_SEC_ALARM, secs);
if (!ret)
ret = jz4740_rtc_ctrl_set_bits(rtc, JZ_RTC_CTRL_AE, alrm->enabled);
ret = jz4740_rtc_ctrl_set_bits(rtc,
JZ_RTC_CTRL_AE | JZ_RTC_CTRL_AF_IRQ, alrm->enabled);
return ret;
}
@ -258,6 +260,8 @@ static int __devinit jz4740_rtc_probe(struct platform_device *pdev)
platform_set_drvdata(pdev, rtc);
device_init_wakeup(&pdev->dev, 1);
rtc->rtc = rtc_device_register(pdev->name, &pdev->dev, &jz4740_rtc_ops,
THIS_MODULE);
if (IS_ERR(rtc->rtc)) {
@ -318,12 +322,43 @@ static int __devexit jz4740_rtc_remove(struct platform_device *pdev)
return 0;
}
#ifdef CONFIG_PM
static int jz4740_rtc_suspend(struct device *dev)
{
struct jz4740_rtc *rtc = dev_get_drvdata(dev);
if (device_may_wakeup(dev))
enable_irq_wake(rtc->irq);
return 0;
}
static int jz4740_rtc_resume(struct device *dev)
{
struct jz4740_rtc *rtc = dev_get_drvdata(dev);
if (device_may_wakeup(dev))
disable_irq_wake(rtc->irq);
return 0;
}
static const struct dev_pm_ops jz4740_pm_ops = {
.suspend = jz4740_rtc_suspend,
.resume = jz4740_rtc_resume,
};
#define JZ4740_RTC_PM_OPS (&jz4740_pm_ops)
#else
#define JZ4740_RTC_PM_OPS NULL
#endif /* CONFIG_PM */
struct platform_driver jz4740_rtc_driver = {
.probe = jz4740_rtc_probe,
.remove = __devexit_p(jz4740_rtc_remove),
.driver = {
.name = "jz4740-rtc",
.owner = THIS_MODULE,
.pm = JZ4740_RTC_PM_OPS,
},
};