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extcon: arizona: Time out if MICDET fails to report 

In pathological cases the microphone detection may fail to report, for
example due to a failure to get a stable measurement. Provide a timeout
to cover such cases.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
hifive-unleashed-5.1
Mark Brown 2013-04-01 19:17:34 +01:00
parent 9c2ba270ea
commit 939c5671d1
1 changed files with 35 additions and 3 deletions
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38
drivers/extcon/extcon-arizona.c
View File

@ -42,6 +42,7 @@
#define ARIZONA_HPDET_MAX 10000
#define HPDET_DEBOUNCE 500
#define MICD_TIMEOUT 2000
struct arizona_extcon_info {
struct device *dev;
@ -63,6 +64,7 @@ struct arizona_extcon_info {
bool micd_clamp;
struct delayed_work hpdet_work;
struct delayed_work micd_timeout_work;
bool hpdet_active;
bool hpdet_done;
@ -730,6 +732,24 @@ err:
info->hpdet_active = false;
}
static void arizona_micd_timeout_work(struct work_struct *work)
{
struct arizona_extcon_info *info = container_of(work,
struct arizona_extcon_info,
micd_timeout_work.work);
mutex_lock(&info->lock);
dev_dbg(info->arizona->dev, "MICD timed out, reporting HP\n");
arizona_identify_headphone(info);
info->detecting = false;
arizona_stop_mic(info);
mutex_unlock(&info->lock);
}
static irqreturn_t arizona_micdet(int irq, void *data)
{
struct arizona_extcon_info *info = data;
@ -737,6 +757,8 @@ static irqreturn_t arizona_micdet(int irq, void *data)
unsigned int val = 0, lvl;
int ret, i, key;
cancel_delayed_work_sync(&info->micd_timeout_work);
mutex_lock(&info->lock);
for (i = 0; i < 10 && !(val & 0x7fc); i++) {
@ -858,6 +880,10 @@ static irqreturn_t arizona_micdet(int irq, void *data)
}
handled:
if (info->detecting)
schedule_delayed_work(&info->micd_timeout_work,
msecs_to_jiffies(MICD_TIMEOUT));
pm_runtime_mark_last_busy(info->dev);
mutex_unlock(&info->lock);
@ -880,10 +906,11 @@ static irqreturn_t arizona_jackdet(int irq, void *data)
struct arizona_extcon_info *info = data;
struct arizona *arizona = info->arizona;
unsigned int val, present, mask;
bool cancelled;
bool cancelled_hp, cancelled_mic;
int ret, i;
cancelled = cancel_delayed_work_sync(&info->hpdet_work);
cancelled_hp = cancel_delayed_work_sync(&info->hpdet_work);
cancelled_mic = cancel_delayed_work_sync(&info->micd_timeout_work);
pm_runtime_get_sync(info->dev);
@ -909,10 +936,14 @@ static irqreturn_t arizona_jackdet(int irq, void *data)
val &= mask;
if (val == info->last_jackdet) {
dev_dbg(arizona->dev, "Suppressing duplicate JACKDET\n");
if (cancelled)
if (cancelled_hp)
schedule_delayed_work(&info->hpdet_work,
msecs_to_jiffies(HPDET_DEBOUNCE));
if (cancelled_mic)
schedule_delayed_work(&info->micd_timeout_work,
msecs_to_jiffies(MICD_TIMEOUT));
goto out;
}
info->last_jackdet = val;
@ -1037,6 +1068,7 @@ static int arizona_extcon_probe(struct platform_device *pdev)
info->dev = &pdev->dev;
info->last_jackdet = ~(ARIZONA_MICD_CLAMP_STS | ARIZONA_JD1_STS);
INIT_DELAYED_WORK(&info->hpdet_work, arizona_hpdet_work);
INIT_DELAYED_WORK(&info->micd_timeout_work, arizona_micd_timeout_work);
platform_set_drvdata(pdev, info);
switch (arizona->type) {