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

[Dmitry Torokhov]

On Sun, Jun 14, 2015 at 12:42:21PM +0200, Hans de Goede wrote:
> 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>

Carlo, Chen-Yu, could you please give this patch a spin and let us know
if it works on your boards?

Thanks!

> ---
>  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);
>  
>  	input_sync(idev);
> -- 
> 2.4.3
> 

-- 
Dmitry