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path: root/drivers/rtc/rtc-ds1742.c
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Diffstat (limited to 'drivers/rtc/rtc-ds1742.c')
-rw-r--r--drivers/rtc/rtc-ds1742.c10
1 files changed, 7 insertions, 3 deletions
diff --git a/drivers/rtc/rtc-ds1742.c b/drivers/rtc/rtc-ds1742.c
index 01da5ab..6273a3d 100644
--- a/drivers/rtc/rtc-ds1742.c
+++ b/drivers/rtc/rtc-ds1742.c
@@ -17,7 +17,7 @@
#include <linux/platform_device.h>
#include <linux/io.h>
-#define DRV_VERSION "0.1"
+#define DRV_VERSION "0.2"
#define RTC_REG_SIZE 0x800
#define RTC_OFFSET 0x7f8
@@ -196,7 +196,7 @@ static int __init ds1742_rtc_probe(struct platform_device *pdev)
writeb(sec, ioaddr + RTC_SECONDS);
writeb(cen & RTC_CENTURY_MASK, ioaddr + RTC_CONTROL);
}
- if (readb(ioaddr + RTC_DAY) & RTC_BATT_FLAG)
+ if (!(readb(ioaddr + RTC_DAY) & RTC_BATT_FLAG))
dev_warn(&pdev->dev, "voltage-low detected.\n");
rtc = rtc_device_register(pdev->name, &pdev->dev,
@@ -208,9 +208,13 @@ static int __init ds1742_rtc_probe(struct platform_device *pdev)
pdata->rtc = rtc;
pdata->last_jiffies = jiffies;
platform_set_drvdata(pdev, pdata);
- sysfs_create_bin_file(&pdev->dev.kobj, &ds1742_nvram_attr);
+ ret = sysfs_create_bin_file(&pdev->dev.kobj, &ds1742_nvram_attr);
+ if (ret)
+ goto out;
return 0;
out:
+ if (pdata->rtc)
+ rtc_device_unregister(pdata->rtc);
if (ioaddr)
iounmap(ioaddr);
if (pdata->baseaddr)