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path: root/drivers/rtc/rtc-sirfsoc.c
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Diffstat (limited to 'drivers/rtc/rtc-sirfsoc.c')
-rw-r--r--drivers/rtc/rtc-sirfsoc.c66
1 files changed, 51 insertions, 15 deletions
diff --git a/drivers/rtc/rtc-sirfsoc.c b/drivers/rtc/rtc-sirfsoc.c
index 76e38007ba90..d2ac6688e5c7 100644
--- a/drivers/rtc/rtc-sirfsoc.c
+++ b/drivers/rtc/rtc-sirfsoc.c
@@ -47,6 +47,7 @@ struct sirfsoc_rtc_drv {
unsigned irq_wake;
/* Overflow for every 8 years extra time */
u32 overflow_rtc;
+ spinlock_t lock;
#ifdef CONFIG_PM
u32 saved_counter;
u32 saved_overflow_rtc;
@@ -61,7 +62,7 @@ static int sirfsoc_rtc_read_alarm(struct device *dev,
rtcdrv = dev_get_drvdata(dev);
- local_irq_disable();
+ spin_lock_irq(&rtcdrv->lock);
rtc_count = sirfsoc_rtc_iobrg_readl(rtcdrv->rtc_base + RTC_CN);
@@ -84,7 +85,8 @@ static int sirfsoc_rtc_read_alarm(struct device *dev,
if (sirfsoc_rtc_iobrg_readl(
rtcdrv->rtc_base + RTC_STATUS) & SIRFSOC_RTC_AL0E)
alrm->enabled = 1;
- local_irq_enable();
+
+ spin_unlock_irq(&rtcdrv->lock);
return 0;
}
@@ -99,7 +101,7 @@ static int sirfsoc_rtc_set_alarm(struct device *dev,
if (alrm->enabled) {
rtc_tm_to_time(&(alrm->time), &rtc_alarm);
- local_irq_disable();
+ spin_lock_irq(&rtcdrv->lock);
rtc_status_reg = sirfsoc_rtc_iobrg_readl(
rtcdrv->rtc_base + RTC_STATUS);
@@ -123,14 +125,15 @@ static int sirfsoc_rtc_set_alarm(struct device *dev,
rtc_status_reg |= SIRFSOC_RTC_AL0E;
sirfsoc_rtc_iobrg_writel(
rtc_status_reg, rtcdrv->rtc_base + RTC_STATUS);
- local_irq_enable();
+
+ spin_unlock_irq(&rtcdrv->lock);
} else {
/*
* if this function was called with enabled=0
* then it could mean that the application is
* trying to cancel an ongoing alarm
*/
- local_irq_disable();
+ spin_lock_irq(&rtcdrv->lock);
rtc_status_reg = sirfsoc_rtc_iobrg_readl(
rtcdrv->rtc_base + RTC_STATUS);
@@ -146,7 +149,7 @@ static int sirfsoc_rtc_set_alarm(struct device *dev,
rtcdrv->rtc_base + RTC_STATUS);
}
- local_irq_enable();
+ spin_unlock_irq(&rtcdrv->lock);
}
return 0;
@@ -209,12 +212,38 @@ static int sirfsoc_rtc_ioctl(struct device *dev, unsigned int cmd,
}
}
+static int sirfsoc_rtc_alarm_irq_enable(struct device *dev,
+ unsigned int enabled)
+{
+ unsigned long rtc_status_reg = 0x0;
+ struct sirfsoc_rtc_drv *rtcdrv;
+
+ rtcdrv = dev_get_drvdata(dev);
+
+ spin_lock_irq(&rtcdrv->lock);
+
+ rtc_status_reg = sirfsoc_rtc_iobrg_readl(
+ rtcdrv->rtc_base + RTC_STATUS);
+ if (enabled)
+ rtc_status_reg |= SIRFSOC_RTC_AL0E;
+ else
+ rtc_status_reg &= ~SIRFSOC_RTC_AL0E;
+
+ sirfsoc_rtc_iobrg_writel(rtc_status_reg, rtcdrv->rtc_base + RTC_STATUS);
+
+ spin_unlock_irq(&rtcdrv->lock);
+
+ return 0;
+
+}
+
static const struct rtc_class_ops sirfsoc_rtc_ops = {
.read_time = sirfsoc_rtc_read_time,
.set_time = sirfsoc_rtc_set_time,
.read_alarm = sirfsoc_rtc_read_alarm,
.set_alarm = sirfsoc_rtc_set_alarm,
- .ioctl = sirfsoc_rtc_ioctl
+ .ioctl = sirfsoc_rtc_ioctl,
+ .alarm_irq_enable = sirfsoc_rtc_alarm_irq_enable
};
static irqreturn_t sirfsoc_rtc_irq_handler(int irq, void *pdata)
@@ -223,6 +252,8 @@ static irqreturn_t sirfsoc_rtc_irq_handler(int irq, void *pdata)
unsigned long rtc_status_reg = 0x0;
unsigned long events = 0x0;
+ spin_lock(&rtcdrv->lock);
+
rtc_status_reg = sirfsoc_rtc_iobrg_readl(rtcdrv->rtc_base + RTC_STATUS);
/* this bit will be set ONLY if an alarm was active
* and it expired NOW
@@ -240,6 +271,9 @@ static irqreturn_t sirfsoc_rtc_irq_handler(int irq, void *pdata)
rtc_status_reg &= ~(SIRFSOC_RTC_AL0E);
}
sirfsoc_rtc_iobrg_writel(rtc_status_reg, rtcdrv->rtc_base + RTC_STATUS);
+
+ spin_unlock(&rtcdrv->lock);
+
/* this should wake up any apps polling/waiting on the read
* after setting the alarm
*/
@@ -267,6 +301,8 @@ static int sirfsoc_rtc_probe(struct platform_device *pdev)
if (rtcdrv == NULL)
return -ENOMEM;
+ spin_lock_init(&rtcdrv->lock);
+
err = of_property_read_u32(np, "reg", &rtcdrv->rtc_base);
if (err) {
dev_err(&pdev->dev, "unable to find base address of rtc node in dtb\n");
@@ -286,14 +322,6 @@ static int sirfsoc_rtc_probe(struct platform_device *pdev)
rtc_div = ((32768 / RTC_HZ) / 2) - 1;
sirfsoc_rtc_iobrg_writel(rtc_div, rtcdrv->rtc_base + RTC_DIV);
- rtcdrv->rtc = devm_rtc_device_register(&pdev->dev, pdev->name,
- &sirfsoc_rtc_ops, THIS_MODULE);
- if (IS_ERR(rtcdrv->rtc)) {
- err = PTR_ERR(rtcdrv->rtc);
- dev_err(&pdev->dev, "can't register RTC device\n");
- return err;
- }
-
/* 0x3 -> RTC_CLK */
sirfsoc_rtc_iobrg_writel(SIRFSOC_RTC_CLK,
rtcdrv->rtc_base + RTC_CLOCK_SWITCH);
@@ -308,6 +336,14 @@ static int sirfsoc_rtc_probe(struct platform_device *pdev)
rtcdrv->overflow_rtc =
sirfsoc_rtc_iobrg_readl(rtcdrv->rtc_base + RTC_SW_VALUE);
+ rtcdrv->rtc = devm_rtc_device_register(&pdev->dev, pdev->name,
+ &sirfsoc_rtc_ops, THIS_MODULE);
+ if (IS_ERR(rtcdrv->rtc)) {
+ err = PTR_ERR(rtcdrv->rtc);
+ dev_err(&pdev->dev, "can't register RTC device\n");
+ return err;
+ }
+
rtcdrv->irq = platform_get_irq(pdev, 0);
err = devm_request_irq(
&pdev->dev,