From a966a967c56f40f99bc69940e6451d5ce92ab7eb Mon Sep 17 00:00:00 2001
From: sam_chen <sam_chen@asus.com>
Date: Tue, 2 Apr 2013 10:46:45 +0800
Subject: [PATCH] Audio: headset: Disable bandgap power according to codec
 bandgap status.

Change-Id: Ieefd76b0cc02fd58e240a934fd9f84b309d48c5b
Signed-off-by: sam_chen <sam_chen@asus.com>
---
 sound/soc/msm/asustek_headset.c | 11 ++++++++---
 1 file changed, 8 insertions(+), 3 deletions(-)

diff --git a/sound/soc/msm/asustek_headset.c b/sound/soc/msm/asustek_headset.c
index c2c4127db4f..504872fc8d8 100644
--- a/sound/soc/msm/asustek_headset.c
+++ b/sound/soc/msm/asustek_headset.c
@@ -38,6 +38,7 @@
 #include <asm/string.h>
 #include <sound/soc.h>
 #include <linux/mfd/wcd9xxx/wcd9310_registers.h>
+#include "../codecs/wcd9310.h"
 #include "../../../arch/arm/mach-msm/board-8960.h"
 #include <asm/mach-types.h>
 #include <mach/board_asustek.h>
@@ -119,9 +120,13 @@ static void set_hs_micbias(int status)
                                 0xC0, 0x00);
 		snd_soc_update_bits(wcd9310_codec, TABLA_A_LDO_H_MODE_1,
 				0xff, 0x65);
-		/* Disable Bandgap Reference */
-		snd_soc_update_bits(wcd9310_codec, TABLA_A_BIAS_CENTRAL_BG_CTL,
-                                0x0F, 0x00);
+		if (tabla_check_bandgap_status(wcd9310_codec) == 0) {
+			/* Disable Bandgap Reference power */
+			printk("%s badgap status: OFF power down bandgap\n",
+				__func__);
+			snd_soc_write(wcd9310_codec,
+				TABLA_A_BIAS_CENTRAL_BG_CTL, 0x50);
+		}
 	}
 
 	return;