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extcon: arizona: Attempt more microphone measurements 

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>
hifive-unleashed-5.1
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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4
drivers/extcon/extcon-arizona.c
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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);