[PATCH] staging/iio/adc/MXS/LRADC: fix touchscreen statemachine

[Alexandre Belloni]

On 24/02/2014 at 15:39:53 +0100, Juergen Beisert wrote :
> Releasing the touchscreen lets the internal statemachine left in a wrong state.
> Due to this the release coordinate will be reported again by accident when the next
> touchscreen event happens. This change sets up the correct state when waiting
> for the next touchscreen event.
>     
> Signed-off-by: Juergen Beisert <jbe at pengutronix.de>
> 

Tested-by: Alexandre Belloni <alexandre.belloni at free-electrons.com>

> diff --git a/drivers/staging/iio/adc/mxs-lradc.c b/drivers/staging/iio/adc/mxs-lradc.c
> index 7fc66a6..514844e 100644
> --- a/drivers/staging/iio/adc/mxs-lradc.c
> +++ b/drivers/staging/iio/adc/mxs-lradc.c
> @@ -757,6 +757,7 @@ static void mxs_lradc_finish_touch_event(struct mxs_lradc *lradc, bool valid)
>  	}
>  
>  	/* if it is released, wait for the next touch via IRQ */
> +	lradc->cur_plate = LRADC_TOUCH;
>  	mxs_lradc_reg_clear(lradc, LRADC_CTRL1_TOUCH_DETECT_IRQ, LRADC_CTRL1);
>  	mxs_lradc_reg_set(lradc, LRADC_CTRL1_TOUCH_DETECT_IRQ_EN, LRADC_CTRL1);
>  }
> 
> -- 
> Pengutronix e.K.                              | Juergen Beisert             |
> Linux Solutions for Science and Industry      | http://www.pengutronix.de/  |

-- 
Alexandre Belloni, Free Electrons
Embedded Linux, Kernel and Android engineering
http://free-electrons.com