diff options
| -rw-r--r-- | drivers/rtc/rtc-twl.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/drivers/rtc/rtc-twl.c b/drivers/rtc/rtc-twl.c index d43b4f6eb4e4..18dff5255670 100644 --- a/drivers/rtc/rtc-twl.c +++ b/drivers/rtc/rtc-twl.c @@ -176,6 +176,10 @@ static int set_rtc_irq_bit(unsigned char bit) unsigned char val; int ret; + /* if the bit is set, return from here */ + if (rtc_irq_bits & bit) + return 0; + val = rtc_irq_bits | bit; val &= ~BIT_RTC_INTERRUPTS_REG_EVERY_M; ret = twl_rtc_write_u8(val, REG_RTC_INTERRUPTS_REG); @@ -193,6 +197,10 @@ static int mask_rtc_irq_bit(unsigned char bit) unsigned char val; int ret; + /* if the bit is clear, return from here */ + if (!(rtc_irq_bits & bit)) + return 0; + val = rtc_irq_bits & ~bit; ret = twl_rtc_write_u8(val, REG_RTC_INTERRUPTS_REG); if (ret == 0) |