imx233: add note about power down bits in audioout

Change-Id: I204acff8ee697d70fd16f9828010646b10a8f11b

1 files changed, 4 insertions, 0 deletions

diff --git a/firmware/target/arm/imx233/audioout-imx233.c b/firmware/target/arm/imx233/audioout-imx233.c
index a4c353c88e..4e26fe1349 100644
--- a/firmware/target/arm/imx233/audioout-imx233.c
+++ b/firmware/target/arm/imx233/audioout-imx233.c
@@ -279,6 +279,8 @@ void imx233_audioout_enable_spkr(bool en)
     else
     {
         BF_SET(AUDIOOUT_SPEAKERCTRL, MUTE);
+        /* despite what the manual says, we can perfectly set and clear this bit
+         * at will, no need for a reset */
         BF_SET(AUDIOOUT_PWRDN, SPEAKER);
     }
 #elif IMX233_SUBTARGET >= 3700
@@ -311,6 +313,8 @@ void imx233_audioout_enable_spkr(bool en)
         /** Reverse procedure */
         BF_SET(AUDIOOUT_LINEOUTCTRL, MUTE);
         BF_WR(AUDIOOUT_LINEOUTCTRL, CHARGE_CAP(2));
+        /* despite what the manual says, we can perfectly set and clear this bit
+         * at will, no need for a reset */
         BF_SET(AUDIOOUT_PWRDN, LINEOUT);
     }
 #else