rtc: rx8025: check time validity when necessary

Check time validity when reading time as this is when we need to know.

Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>

diff --git a/drivers/rtc/rtc-rx8025.c b/drivers/rtc/rtc-rx8025.c
index f3f1de2..24c3d69 100644 (file)
--- a/drivers/rtc/rtc-rx8025.c
+++ b/drivers/rtc/rtc-rx8025.c
@@ -104,6 +104,31 @@ static s32 rx8025_write_regs(const struct i2c_client *client,
                                              length, values);
 }
 
+static int rx8025_check_validity(struct device *dev)
+{
+       struct rx8025_data *rx8025 = dev_get_drvdata(dev);
+       int ctrl2;
+
+       ctrl2 = rx8025_read_reg(rx8025->client, RX8025_REG_CTRL2);
+       if (ctrl2 < 0)
+               return ctrl2;
+
+       if (ctrl2 & RX8025_BIT_CTRL2_VDET)
+               dev_warn(dev, "power voltage drop detected\n");
+
+       if (ctrl2 & RX8025_BIT_CTRL2_PON) {
+               dev_warn(dev, "power-on reset detected, date is invalid\n");
+               return -EINVAL;
+       }
+
+       if (!(ctrl2 & RX8025_BIT_CTRL2_XST)) {
+               dev_warn(dev, "crystal stopped, date is invalid\n");
+               return -EINVAL;
+       }
+
+       return 0;
+}
+
 static int rx8025_reset_validity(struct i2c_client *client)
 {
        int ctrl2 = rx8025_read_reg(client, RX8025_REG_CTRL2);
@@ -154,21 +179,11 @@ static int rx8025_get_time(struct device *dev, struct rtc_time *dt)
 {
        struct rx8025_data *rx8025 = dev_get_drvdata(dev);
        u8 date[7];
-       int ctrl, err;
-
-       ctrl = rx8025_read_reg(rx8025->client, RX8025_REG_CTRL2);
-       if (ctrl < 0)
-               return ctrl;
-
-       if (ctrl & RX8025_BIT_CTRL2_PON) {
-               dev_warn(dev, "power-on reset detected, date is invalid\n");
-               return -EINVAL;
-       }
+       int err;
 
-       if (!(ctrl & RX8025_BIT_CTRL2_XST)) {
-               dev_warn(dev, "crystal stopped, date is invalid\n");
-               return -EINVAL;
-       }
+       err = rx8025_check_validity(dev);
+       if (err)
+               return err;
 
        err = rx8025_read_regs(rx8025->client, RX8025_REG_SEC, 7, date);
        if (err)
@@ -250,21 +265,6 @@ static int rx8025_init_client(struct i2c_client *client)
        /* Keep test bit zero ! */
        rx8025->ctrl1 = ctrl[0] & ~RX8025_BIT_CTRL1_TEST;
 
-       if (ctrl[1] & RX8025_BIT_CTRL2_PON) {
-               dev_warn(&client->dev, "power-on reset was detected, "
-                        "you may have to readjust the clock\n");
-       }
-
-       if (ctrl[1] & RX8025_BIT_CTRL2_VDET) {
-               dev_warn(&client->dev, "a power voltage drop was detected, "
-                        "you may have to readjust the clock\n");
-       }
-
-       if (!(ctrl[1] & RX8025_BIT_CTRL2_XST)) {
-               dev_warn(&client->dev, "Oscillation stop was detected,"
-                        "you may have to readjust the clock\n");
-       }
-
        if (ctrl[1] & (RX8025_BIT_CTRL2_DAFG | RX8025_BIT_CTRL2_WAFG)) {
                dev_warn(&client->dev, "Alarm was detected\n");
                need_clear = 1;