From 4304d47d3b19bb74a18047572fad4aa3f5c8b5b8 Mon Sep 17 00:00:00 2001
From: Amaury Pouly <amaury.pouly@gmail.com>
Date: Sun, 21 Aug 2016 20:33:18 +0100
Subject: tlv320: document audiohw setting based on tlv320.c

Change-Id: I7cf354cb948444595ca541a4bf70dfbcf01147f2
---
 firmware/export/tlv320.h | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

(limited to 'firmware')

diff --git a/firmware/export/tlv320.h b/firmware/export/tlv320.h
index 75f98bc142..6c722bb437 100644
--- a/firmware/export/tlv320.h
+++ b/firmware/export/tlv320.h
@@ -26,7 +26,8 @@
 
 AUDIOHW_SETTING(VOLUME,     "dB", 0,  1, -74,   6, -20)
 #ifdef HAVE_RECORDING
- /* (x - 23)/1.5 *10 */
+/* Line in   : 0 .. 31 => Volume -34.5 .. +12 dB
+ * Mic (left): 0 ..  1 => Volume  +0,     +20 dB */
 AUDIOHW_SETTING(LEFT_GAIN,  "dB", 1,  1,   0,  31,  23, (val - 23) * 15)
 AUDIOHW_SETTING(RIGHT_GAIN, "dB", 1,  1,   0,  31,  23, (val - 23) * 15)
 /* 0 or 20 dB */
-- 
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