[PATCH] input: axp20x-pek: Fix reporting button state as inverted

Hans de Goede hdegoede at redhat.com
Sun Jun 14 03:42:21 PDT 2015

Currently we are reporting the button state as inverted on all boards with
an axp209 pmic, tested on a ba10-tvbox, bananapi, bananapro, cubietruck and
utoo-p66 tablet.

The axp209 datasheet clearly states that the power button must be connected
between the PWRON key and ground. Which means that on a press we will get
a falling edge (dbf) irq not a rising one, and likewise on release we will
get a rising edge (dbr) irq, not a falling one.

This commit swaps the check for the 2 irqs fixing the inverted reporting of
the power button state.

Signed-off-by: Hans de Goede <hdegoede at redhat.com>
 drivers/input/misc/axp20x-pek.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/drivers/input/misc/axp20x-pek.c b/drivers/input/misc/axp20x-pek.c
index f1c8447..10e140a 100644
--- a/drivers/input/misc/axp20x-pek.c
+++ b/drivers/input/misc/axp20x-pek.c
@@ -167,9 +167,13 @@ static irqreturn_t axp20x_pek_irq(int irq, void *pwr)
 	struct input_dev *idev = pwr;
 	struct axp20x_pek *axp20x_pek = input_get_drvdata(idev);
-	if (irq == axp20x_pek->irq_dbr)
+	/*
+	 * The power-button is connected to ground so a falling edge (dbf)
+	 * means it is pressed.
+	 */
+	if (irq == axp20x_pek->irq_dbf)
 		input_report_key(idev, KEY_POWER, true);
-	else if (irq == axp20x_pek->irq_dbf)
+	else if (irq == axp20x_pek->irq_dbr)
 		input_report_key(idev, KEY_POWER, false);

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