This patch add an implementation of the rtc_enable_32khz_output() that
uses the driver model i2c APIs.
Signed-off-by: Chuanhua Han <chuanhua....@nxp.com>
---
drivers/rtc/ds3231.c | 17 +++++++++++++++++
include/rtc.h | 1 +
2 files changed, 18 insertions(+)
diff --git a/drivers/rtc/ds3231.c b/drivers/rtc/ds3231.c
index 79b026a..2f7bbc2 100644
--- a/drivers/rtc/ds3231.c
+++ b/drivers/rtc/ds3231.c
@@ -251,6 +251,23 @@ static int ds3231_probe(struct udevice *dev)
return 0;
}
+void rtc_enable_32khz_output(void)
+{
+ int ret;
+ struct udevice *dev;
+
+#ifdef CONFIG_DS3231_BUS_NUM
+ ret = i2c_get_chip_for_busnum(CONFIG_DS3231_BUS_NUM,
+ CONFIG_SYS_I2C_RTC_ADDR, 1, &dev);
+#else
+ ret = i2c_get_chip_for_busnum(0, CONFIG_SYS_I2C_RTC_ADDR, 1, &dev);
+#endif
+ if (!ret)
+ dm_i2c_reg_write(dev, RTC_STAT_REG_ADDR,
+ RTC_STAT_BIT_BB32KHZ |
+ RTC_STAT_BIT_EN32KHZ);
+}
+
static const struct rtc_ops ds3231_rtc_ops = {
.get = ds3231_rtc_get,
.set = ds3231_rtc_set,
diff --git a/include/rtc.h b/include/rtc.h
index b255bdc..690391e 100644
--- a/include/rtc.h
+++ b/include/rtc.h
@@ -166,6 +166,7 @@ int rtc_read32(struct udevice *dev, unsigned int reg, u32
*valuep);
*/
int rtc_write32(struct udevice *dev, unsigned int reg, u32 value);
+void rtc_enable_32khz_output(void);
#else
int rtc_get (struct rtc_time *);
int rtc_set (struct rtc_time *);
--
2.9.5
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