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-rw-r--r--drivers/rtc/ds3231.c10
1 files changed, 10 insertions, 0 deletions
diff --git a/drivers/rtc/ds3231.c b/drivers/rtc/ds3231.c
index c84bbc6..e5e1be1 100644
--- a/drivers/rtc/ds3231.c
+++ b/drivers/rtc/ds3231.c
@@ -49,6 +49,8 @@
#define RTC_STAT_BIT_A1F 0x1 /* Alarm 1 flag */
#define RTC_STAT_BIT_A2F 0x2 /* Alarm 2 flag */
#define RTC_STAT_BIT_OSF 0x80 /* Oscillator stop flag */
+#define RTC_STAT_BIT_BB32KHZ 0x40 /* Battery backed 32KHz Output */
+#define RTC_STAT_BIT_EN32KHZ 0x8 /* Enable 32KHz Output */
static uchar rtc_read (uchar reg);
@@ -141,6 +143,14 @@ void rtc_reset (void)
rtc_write (RTC_CTL_REG_ADDR, RTC_CTL_BIT_RS1 | RTC_CTL_BIT_RS2);
}
+/*
+ * Enable 32KHz output
+ */
+void rtc_enable_32khz_output(void)
+{
+ rtc_write(RTC_STAT_REG_ADDR,
+ RTC_STAT_BIT_BB32KHZ | RTC_STAT_BIT_EN32KHZ);
+}
/*
* Helper functions