si4700 tuner: fix power consumption issue caused by ill-defined power state at startup

Change-Id: I657bc7e3d330f436859cfef2a89b0813bc008c49

1 files changed, 4 insertions, 0 deletions

diff --git a/firmware/drivers/tuner/si4700.c b/firmware/drivers/tuner/si4700.c
index 16ec136d2e..f133c806ef 100644
--- a/firmware/drivers/tuner/si4700.c
+++ b/firmware/drivers/tuner/si4700.c
@@ -368,6 +368,10 @@ void si4700_init(void)
     mutex_init(&fmr_mutex);
     /* check device id */
     if (si4700_detect()) {
+        /* make sure the tuner goes into a well-defined powered-off state */
+        si4700_sleep(0);
+        si4700_sleep(1);
+
 #ifdef HAVE_RDS_CAP
         si4700_rds_init();
 #endif