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extcon: arizona: Add some debounce time before starting HPDET identification

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The HPDET identification method does not have the same natural debounce
built into it that the standard MICDET method does so add some extra on
top of what the jack detection does in hardware to make sure we get a
robust result.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
This commit is contained in:
Mark Brown 2013-02-05 21:00:15 +00:00
parent e339af1c45
commit 0e27bd3137
1 changed files with 20 additions and 2 deletions
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22
drivers/extcon/extcon-arizona.c
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@ -53,6 +53,8 @@ struct arizona_extcon_info {
bool micd_reva;
bool micd_clamp;
struct delayed_work hpdet_work;
bool hpdet_active;
int num_hpdet_res;
@ -640,7 +642,7 @@ static void arizona_start_hpdet_acc_id(struct arizona_extcon_info *info)
dev_dbg(arizona->dev, "Starting identification via HPDET\n");
/* Make sure we keep the device enabled during the measurement */
pm_runtime_get(info->dev);
pm_runtime_get_sync(info->dev);
info->hpdet_active = true;
@ -813,6 +815,17 @@ handled:
return IRQ_HANDLED;
}
static void arizona_hpdet_work(struct work_struct *work)
{
struct arizona_extcon_info *info = container_of(work,
struct arizona_extcon_info,
hpdet_work.work);
mutex_lock(&info->lock);
arizona_start_hpdet_acc_id(info);
mutex_unlock(&info->lock);
}
static irqreturn_t arizona_jackdet(int irq, void *data)
{
struct arizona_extcon_info *info = data;
@ -822,6 +835,8 @@ static irqreturn_t arizona_jackdet(int irq, void *data)
pm_runtime_get_sync(info->dev);
cancel_delayed_work_sync(&info->hpdet_work);
mutex_lock(&info->lock);
if (arizona->pdata.jd_gpio5) {
@ -857,7 +872,8 @@ static irqreturn_t arizona_jackdet(int irq, void *data)
arizona_start_mic(info);
} else {
arizona_start_hpdet_acc_id(info);
schedule_delayed_work(&info->hpdet_work,
msecs_to_jiffies(250));
}
regmap_update_bits(arizona->regmap,
@ -927,6 +943,7 @@ static int arizona_extcon_probe(struct platform_device *pdev)
mutex_init(&info->lock);
info->arizona = arizona;
info->dev = &pdev->dev;
INIT_DELAYED_WORK(&info->hpdet_work, arizona_hpdet_work);
platform_set_drvdata(pdev, info);
switch (arizona->type) {
@ -1173,6 +1190,7 @@ static int arizona_extcon_remove(struct platform_device *pdev)
arizona_free_irq(arizona, ARIZONA_IRQ_MICDET, info);
arizona_free_irq(arizona, jack_irq_rise, info);
arizona_free_irq(arizona, jack_irq_fall, info);
cancel_delayed_work_sync(&info->hpdet_work);
regmap_update_bits(arizona->regmap, ARIZONA_JACK_DETECT_ANALOGUE,
ARIZONA_JD1_ENA, 0);
arizona_clk32k_disable(arizona);