SM501: Check SM501 ID register on initialisation

[powerpc.git] / drivers / rtc / rtc-vr41xx.c

diff --git a/drivers/rtc/rtc-vr41xx.c b/drivers/rtc/rtc-vr41xx.c
index 596764f..af7596e 100644 (file)
--- a/drivers/rtc/rtc-vr41xx.c
+++ b/drivers/rtc/rtc-vr41xx.c
@@ -97,6 +97,7 @@ static DEFINE_SPINLOCK(rtc_lock);
 static char rtc_name[] = "RTC";
 static unsigned long periodic_frequency;
 static unsigned long periodic_count;
+static unsigned int alarm_enabled;
 
 struct resource rtc_resource[2] = {
        {       .name   = rtc_name,
@@ -188,6 +189,7 @@ static int vr41xx_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *wkalrm)
        low = rtc1_read(ECMPLREG);
        mid = rtc1_read(ECMPMREG);
        high = rtc1_read(ECMPHREG);
+       wkalrm->enabled = alarm_enabled;
 
        spin_unlock_irq(&rtc_lock);
 
@@ -206,10 +208,18 @@ static int vr41xx_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *wkalrm)
 
        spin_lock_irq(&rtc_lock);
 
+       if (alarm_enabled)
+               disable_irq(ELAPSEDTIME_IRQ);
+
        rtc1_write(ECMPLREG, (uint16_t)(alarm_sec << 15));
        rtc1_write(ECMPMREG, (uint16_t)(alarm_sec >> 1));
        rtc1_write(ECMPHREG, (uint16_t)(alarm_sec >> 17));
 
+       if (wkalrm->enabled)
+               enable_irq(ELAPSEDTIME_IRQ);
+
+       alarm_enabled = wkalrm->enabled;
+
        spin_unlock_irq(&rtc_lock);
 
        return 0;
@@ -221,10 +231,24 @@ static int vr41xx_rtc_ioctl(struct device *dev, unsigned int cmd, unsigned long
 
        switch (cmd) {
        case RTC_AIE_ON:
-               enable_irq(ELAPSEDTIME_IRQ);
+               spin_lock_irq(&rtc_lock);
+
+               if (!alarm_enabled) {
+                       enable_irq(ELAPSEDTIME_IRQ);
+                       alarm_enabled = 1;
+               }
+
+               spin_unlock_irq(&rtc_lock);
                break;
        case RTC_AIE_OFF:
-               disable_irq(ELAPSEDTIME_IRQ);
+               spin_lock_irq(&rtc_lock);
+
+               if (alarm_enabled) {
+                       disable_irq(ELAPSEDTIME_IRQ);
+                       alarm_enabled = 0;
+               }
+
+               spin_unlock_irq(&rtc_lock);
                break;
        case RTC_PIE_ON:
                enable_irq(RTCLONG1_IRQ);
@@ -268,19 +292,19 @@ static int vr41xx_rtc_ioctl(struct device *dev, unsigned int cmd, unsigned long
        return 0;
 }
 
-static irqreturn_t elapsedtime_interrupt(int irq, void *dev_id, struct pt_regs *regs)
+static irqreturn_t elapsedtime_interrupt(int irq, void *dev_id)
 {
        struct platform_device *pdev = (struct platform_device *)dev_id;
        struct rtc_device *rtc = platform_get_drvdata(pdev);
 
        rtc2_write(RTCINTREG, ELAPSEDTIME_INT);
 
-       rtc_update_irq(&rtc->class_dev, 1, RTC_AF);
+       rtc_update_irq(rtc, 1, RTC_AF);
 
        return IRQ_HANDLED;
 }
 
-static irqreturn_t rtclong1_interrupt(int irq, void *dev_id, struct pt_regs *regs)
+static irqreturn_t rtclong1_interrupt(int irq, void *dev_id)
 {
        struct platform_device *pdev = (struct platform_device *)dev_id;
        struct rtc_device *rtc = platform_get_drvdata(pdev);
@@ -291,12 +315,12 @@ static irqreturn_t rtclong1_interrupt(int irq, void *dev_id, struct pt_regs *reg
        rtc1_write(RTCL1LREG, count);
        rtc1_write(RTCL1HREG, count >> 16);
 
-       rtc_update_irq(&rtc->class_dev, 1, RTC_PF);
+       rtc_update_irq(rtc, 1, RTC_PF);
 
        return IRQ_HANDLED;
 }
 
-static struct rtc_class_ops vr41xx_rtc_ops = {
+static const struct rtc_class_ops vr41xx_rtc_ops = {
        .release        = vr41xx_rtc_release,
        .ioctl          = vr41xx_rtc_ioctl,
        .read_time      = vr41xx_rtc_read_time,