From: Mark Brown <broonie@opensource.wolfsonmicro.com>
Date: Mon, 1 Apr 2013 18:04:43 +0000 (+0100)
Subject: extcon: arizona: Raise minimum microphone impedance for HPDET method
X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=82e2e0fd3fcf2aec9d5796e31d7f29c738331f6b;p=openwrt%2Fstaging%2Fblogic.git

extcon: arizona: Raise minimum microphone impedance for HPDET method

Ensure greater reliability by increasing the minimum threashold for
identifying a microphone.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
---

diff --git a/drivers/extcon/extcon-arizona.c b/drivers/extcon/extcon-arizona.c
index 132bc99fdc06..2f0bd4938fcc 100644
--- a/drivers/extcon/extcon-arizona.c
+++ b/drivers/extcon/extcon-arizona.c
@@ -519,7 +519,7 @@ static int arizona_hpdet_do_id(struct arizona_extcon_info *info, int *reading)
 		 * measure the mic as high impedance.
 		 */
 		if ((info->hpdet_res[0] > info->hpdet_res[1] * 2) ||
-		    (id_gpio && info->hpdet_res[2] > 10)) {
+		    (id_gpio && info->hpdet_res[2] > 1257)) {
 			dev_dbg(arizona->dev, "Detected mic\n");
 			info->mic = true;
 			info->detecting = true;