[PATCH v2 1/2] extcon: arizona: Fix reset of HPDET after race with removal

[Charles Keepax <ckeepax@opensource.wolfsonmicro.com>]

We need to make sure we reset back to our starting state, especially
making sure that we have disabled poll in the register cache.

Signed-off-by: Charles Keepax <ckeepax@opensource.wolfsonmicro.com>
---
 drivers/extcon/extcon-arizona.c |    8 +++++++-
 1 files changed, 7 insertions(+), 1 deletions(-)

diff --git a/drivers/extcon/extcon-arizona.c b/drivers/extcon/extcon-arizona.c
index ec9a14e..dac8ba0 100644
--- a/drivers/extcon/extcon-arizona.c
+++ b/drivers/extcon/extcon-arizona.c
@@ -596,9 +596,15 @@ static irqreturn_t arizona_hpdet_irq(int irq, void *data)
 		dev_err(arizona->dev, "Failed to report HP/line: %d\n",
 			ret);
 
+done:
+	/* Reset back to starting range */
+	regmap_update_bits(arizona->regmap,
+			   ARIZONA_HEADPHONE_DETECT_1,
+			   ARIZONA_HP_IMPEDANCE_RANGE_MASK | ARIZONA_HP_POLL,
+			   0);
+
 	arizona_extcon_do_magic(info, 0);
 
-done:
 	if (id_gpio)
 		gpio_set_value_cansleep(id_gpio, 0);
 
-- 
1.7.2.5