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authorMark Brown <broonie@opensource.wolfsonmicro.com>2013-04-01 19:05:27 +0100
committerMark Brown <broonie@opensource.wolfsonmicro.com>2013-04-02 11:53:56 +0100
commita3e2078d6a14bc67e733f7dbd32d1bc4051c9d90 (patch)
tree0a6bc938ed9080b82d0f2d66a7b0243b7fc6663a /drivers/extcon
parent82e2e0fd3fcf2aec9d5796e31d7f29c738331f6b (diff)
extcon: arizona: Suppress duplicate JACKDET reports
In cases where we see a brief (dis)connection of the jack detection signals we may see a noop jack insertion or removal where the jack has returned to the original state by the time the interrupt is serviced. Suppress these events in order to save work and avoid confusing the rest of the code. Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Diffstat (limited to 'drivers/extcon')
-rw-r--r--drivers/extcon/extcon-arizona.c26
1 files changed, 22 insertions, 4 deletions
diff --git a/drivers/extcon/extcon-arizona.c b/drivers/extcon/extcon-arizona.c
index 2f0bd4938fcc..9e4bffe610b6 100644
--- a/drivers/extcon/extcon-arizona.c
+++ b/drivers/extcon/extcon-arizona.c
@@ -39,6 +39,8 @@
#define ARIZONA_ACCDET_MODE_HPL 1
#define ARIZONA_ACCDET_MODE_HPR 2
+#define HPDET_DEBOUNCE 250
+
struct arizona_extcon_info {
struct device *dev;
struct arizona *arizona;
@@ -46,6 +48,8 @@ struct arizona_extcon_info {
struct regulator *micvdd;
struct input_dev *input;
+ u16 last_jackdet;
+
int micd_mode;
const struct arizona_micd_config *micd_modes;
int micd_num_modes;
@@ -871,11 +875,12 @@ 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;
int ret, i;
- pm_runtime_get_sync(info->dev);
+ cancelled = cancel_delayed_work_sync(&info->hpdet_work);
- cancel_delayed_work_sync(&info->hpdet_work);
+ pm_runtime_get_sync(info->dev);
mutex_lock(&info->lock);
@@ -896,7 +901,18 @@ static irqreturn_t arizona_jackdet(int irq, void *data)
return IRQ_NONE;
}
- if ((val & mask) == present) {
+ val &= mask;
+ if (val == info->last_jackdet) {
+ dev_dbg(arizona->dev, "Suppressing duplicate JACKDET\n");
+ if (cancelled)
+ schedule_delayed_work(&info->hpdet_work,
+ msecs_to_jiffies(HPDET_DEBOUNCE));
+
+ goto out;
+ }
+ info->last_jackdet = val;
+
+ if (info->last_jackdet == present) {
dev_dbg(arizona->dev, "Detected jack\n");
ret = extcon_set_cable_state_(&info->edev,
ARIZONA_CABLE_MECHANICAL, true);
@@ -913,7 +929,7 @@ static irqreturn_t arizona_jackdet(int irq, void *data)
arizona_start_mic(info);
} else {
schedule_delayed_work(&info->hpdet_work,
- msecs_to_jiffies(250));
+ msecs_to_jiffies(HPDET_DEBOUNCE));
}
regmap_update_bits(arizona->regmap,
@@ -953,6 +969,7 @@ static irqreturn_t arizona_jackdet(int irq, void *data)
ARIZONA_JD1_FALL_TRIG_STS |
ARIZONA_JD1_RISE_TRIG_STS);
+out:
mutex_unlock(&info->lock);
pm_runtime_mark_last_busy(info->dev);
@@ -1012,6 +1029,7 @@ static int arizona_extcon_probe(struct platform_device *pdev)
mutex_init(&info->lock);
info->arizona = arizona;
info->dev = &pdev->dev;
+ info->last_jackdet = ~(ARIZONA_MICD_CLAMP_STS | ARIZONA_JD1_STS);
INIT_DELAYED_WORK(&info->hpdet_work, arizona_hpdet_work);
platform_set_drvdata(pdev, info);