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path: root/drivers/rtc/rtc-rx8581.c
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Diffstat (limited to 'drivers/rtc/rtc-rx8581.c')
-rw-r--r--drivers/rtc/rtc-rx8581.c20
1 files changed, 17 insertions, 3 deletions
diff --git a/drivers/rtc/rtc-rx8581.c b/drivers/rtc/rtc-rx8581.c
index 9718aaaa821..600b890a3c1 100644
--- a/drivers/rtc/rtc-rx8581.c
+++ b/drivers/rtc/rtc-rx8581.c
@@ -168,7 +168,7 @@ static int rx8581_set_datetime(struct i2c_client *client, struct rtc_time *tm)
return -EIO;
}
- err = i2c_smbus_write_byte_data(client, RX8581_REG_FLAG,
+ err = i2c_smbus_write_byte_data(client, RX8581_REG_CTRL,
(data | RX8581_CTRL_STOP));
if (err < 0) {
dev_err(&client->dev, "Unable to write control register\n");
@@ -182,6 +182,20 @@ static int rx8581_set_datetime(struct i2c_client *client, struct rtc_time *tm)
return -EIO;
}
+ /* get VLF and clear it */
+ data = i2c_smbus_read_byte_data(client, RX8581_REG_FLAG);
+ if (data < 0) {
+ dev_err(&client->dev, "Unable to read flag register\n");
+ return -EIO;
+ }
+
+ err = i2c_smbus_write_byte_data(client, RX8581_REG_FLAG,
+ (data & ~(RX8581_FLAG_VLF)));
+ if (err != 0) {
+ dev_err(&client->dev, "Unable to write flag register\n");
+ return -EIO;
+ }
+
/* Restart the clock */
data = i2c_smbus_read_byte_data(client, RX8581_REG_CTRL);
if (data < 0) {
@@ -189,8 +203,8 @@ static int rx8581_set_datetime(struct i2c_client *client, struct rtc_time *tm)
return -EIO;
}
- err = i2c_smbus_write_byte_data(client, RX8581_REG_FLAG,
- (data | ~(RX8581_CTRL_STOP)));
+ err = i2c_smbus_write_byte_data(client, RX8581_REG_CTRL,
+ (data & ~(RX8581_CTRL_STOP)));
if (err != 0) {
dev_err(&client->dev, "Unable to write control register\n");
return -EIO;