[PATCH 06/16] extcon: arizona: Raise minimum microphone impedance for HPDET method

From: Mark Brown
Date: Tue Apr 02 2013 - 07:36:46 EST


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

Signed-off-by: Mark Brown <broonie@xxxxxxxxxxxxxxxxxxxxxxxxxxx>
---
drivers/extcon/extcon-arizona.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/extcon/extcon-arizona.c b/drivers/extcon/extcon-arizona.c
index 132bc99..2f0bd49 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;
--
1.7.10.4

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