@@ -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
@@ -151,6 +151,7 @@ int rtc_write32(struct udevice *dev, unsigned int reg, u32 value);
int rtc_get (struct rtc_time *);
int rtc_set (struct rtc_time *);
void rtc_reset (void);
+void rtc_enable_32khz_output(void);
/**
* rtc_read8() - Read an 8-bit register
RTC devices can generate 32KHz output if for -DS3232 device, EN32KHz bit and BB32KHz bit are set -DS3231 device, EN32KHz bit is set, BB32KHz bit is don't care Patch adds rtc_enable_32khz_output() which when called will enable 32KHz output on 32KHz pin Signed-off-by: Priyanka Jain <Priyanka.Jain@freescale.com> --- Based on git://git.denx.de/u-boot-fsl-qoriq drivers/rtc/ds3231.c | 10 ++++++++++ include/rtc.h | 1 + 2 files changed, 11 insertions(+), 0 deletions(-)