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path: root/drivers/rtc/rtc-ds1553.c
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Diffstat (limited to 'drivers/rtc/rtc-ds1553.c')
-rw-r--r--drivers/rtc/rtc-ds1553.c15
1 files changed, 7 insertions, 8 deletions
diff --git a/drivers/rtc/rtc-ds1553.c b/drivers/rtc/rtc-ds1553.c
index b9475cd2021..38d472b6340 100644
--- a/drivers/rtc/rtc-ds1553.c
+++ b/drivers/rtc/rtc-ds1553.c
@@ -162,7 +162,7 @@ static int ds1553_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alrm)
struct platform_device *pdev = to_platform_device(dev);
struct rtc_plat_data *pdata = platform_get_drvdata(pdev);
- if (pdata->irq < 0)
+ if (pdata->irq <= 0)
return -EINVAL;
pdata->alrm_mday = alrm->time.tm_mday;
pdata->alrm_hour = alrm->time.tm_hour;
@@ -179,7 +179,7 @@ static int ds1553_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alrm)
struct platform_device *pdev = to_platform_device(dev);
struct rtc_plat_data *pdata = platform_get_drvdata(pdev);
- if (pdata->irq < 0)
+ if (pdata->irq <= 0)
return -EINVAL;
alrm->time.tm_mday = pdata->alrm_mday < 0 ? 0 : pdata->alrm_mday;
alrm->time.tm_hour = pdata->alrm_hour < 0 ? 0 : pdata->alrm_hour;
@@ -213,7 +213,7 @@ static int ds1553_rtc_ioctl(struct device *dev, unsigned int cmd,
struct platform_device *pdev = to_platform_device(dev);
struct rtc_plat_data *pdata = platform_get_drvdata(pdev);
- if (pdata->irq < 0)
+ if (pdata->irq <= 0)
return -ENOIOCTLCMD; /* fall back into rtc-dev's emulation */
switch (cmd) {
case RTC_AIE_OFF:
@@ -301,7 +301,6 @@ static int __devinit ds1553_rtc_probe(struct platform_device *pdev)
pdata = kzalloc(sizeof(*pdata), GFP_KERNEL);
if (!pdata)
return -ENOMEM;
- pdata->irq = -1;
if (!request_mem_region(res->start, RTC_REG_SIZE, pdev->name)) {
ret = -EBUSY;
goto out;
@@ -327,13 +326,13 @@ static int __devinit ds1553_rtc_probe(struct platform_device *pdev)
if (readb(ioaddr + RTC_FLAGS) & RTC_FLAGS_BLF)
dev_warn(&pdev->dev, "voltage-low detected.\n");
- if (pdata->irq >= 0) {
+ if (pdata->irq > 0) {
writeb(0, ioaddr + RTC_INTERRUPTS);
if (request_irq(pdata->irq, ds1553_rtc_interrupt,
IRQF_DISABLED | IRQF_SHARED,
pdev->name, pdev) < 0) {
dev_warn(&pdev->dev, "interrupt not available.\n");
- pdata->irq = -1;
+ pdata->irq = 0;
}
}
@@ -353,7 +352,7 @@ static int __devinit ds1553_rtc_probe(struct platform_device *pdev)
out:
if (pdata->rtc)
rtc_device_unregister(pdata->rtc);
- if (pdata->irq >= 0)
+ if (pdata->irq > 0)
free_irq(pdata->irq, pdev);
if (ioaddr)
iounmap(ioaddr);
@@ -369,7 +368,7 @@ static int __devexit ds1553_rtc_remove(struct platform_device *pdev)
sysfs_remove_bin_file(&pdev->dev.kobj, &ds1553_nvram_attr);
rtc_device_unregister(pdata->rtc);
- if (pdata->irq >= 0) {
+ if (pdata->irq > 0) {
writeb(0, pdata->ioaddr + RTC_INTERRUPTS);
free_irq(pdata->irq, pdev);
}