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extcon: arizona: Attempt more microphone measurements

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In some pathological use cases users may insert an accessory very slowly
causing multiple indeterminate measurements. Handle this by retrying many
measurements before we give up and declare a headphone.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
This commit is contained in:
Mark Brown
2013-01-25 20:14:44 +08:00
parent 253b5374f0
commit 84eaa13616
1 changed files with 3 additions and 1 deletions
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drivers/extcon/extcon-arizona.c
+3 -1
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@@ -153,6 +153,8 @@ static void arizona_extcon_set_mode(struct arizona_extcon_info *info, int mode)
{
struct arizona *arizona = info->arizona;
mode %= info->num_micd_modes;
if (arizona->pdata.micd_pol_gpio > 0)
gpio_set_value_cansleep(arizona->pdata.micd_pol_gpio,
info->micd_modes[mode].gpio);
@@ -783,7 +785,7 @@ static irqreturn_t arizona_micdet(int irq, void *data)
* impedence then give up and report headphones.
*/
if (info->detecting && (val & 0x3f8)) {
if (info->jack_flips >= info->micd_num_modes) {
if (info->jack_flips >= info->micd_num_modes * 10) {
dev_dbg(arizona->dev, "Detected HP/line\n");
arizona_identify_headphone(info);