rtc: k3: wait until the unlock field is not zero

After writing the magic words to the KICK0 and KICK1 registers, we must
wait for a 1 in the unlock field of the general control register to
signify when the rtc device is in an unlocked state.

Signed-off-by: Bryan Brattlof <bb@ti.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Link: https://lore.kernel.org/r/20220816173312.23243-1-bb@ti.com

diff --git a/drivers/rtc/rtc-ti-k3.c b/drivers/rtc/rtc-ti-k3.c
index 7a0f181d3fefe782dd206ae8abe48fe61860a603..fd26be7868d2559fa8387325447740d1c5191fe7 100644 (file)
--- a/drivers/rtc/rtc-ti-k3.c
+++ b/drivers/rtc/rtc-ti-k3.c
@@ -190,7 +190,7 @@ static int k3rtc_unlock_rtc(struct ti_k3_rtc *priv)
 
        /* Skip fence since we are going to check the unlock bit as fence */
        ret = regmap_field_read_poll_timeout(priv->r_fields[K3RTC_UNLOCK], ret,
-                                            !ret, 2, priv->sync_timeout_us);
+                                            ret, 2, priv->sync_timeout_us);
 
        return ret;
 }