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rtc: mark if rtc-cmos drivers were successfully registered
[GitHub/mt8127/android_kernel_alcatel_ttab.git]
/
drivers
/
rtc
/
rtc-s3c.c
diff --git
a/drivers/rtc/rtc-s3c.c
b/drivers/rtc/rtc-s3c.c
index 7a568beba3f00b95f483664b03d888fc76059877..e0d7b9991505564c412e4771f8061154c5adc449 100644
(file)
--- a/
drivers/rtc/rtc-s3c.c
+++ b/
drivers/rtc/rtc-s3c.c
@@
-94,6
+94,9
@@
static int s3c_rtc_setfreq(struct device *dev, int freq)
{
unsigned int tmp;
+ if (!is_power_of_2(freq))
+ return -EINVAL;
+
spin_lock_irq(&s3c_rtc_pie_lock);
tmp = readb(s3c_rtc_base + S3C2410_TICNT) & S3C2410_TICNT_ENABLE;