[PATCH] iio: trigger: stm32-timer: fix get trigger mode

[jic23@kernel.org (Jonathan Cameron)]

On Thu, 3 Aug 2017 11:22:17 +0200
Fabrice Gasnier <fabrice.gasnier@st.com> wrote:

> Fix reading trigger mode, when other bit-fields are set. SMCR register
> value must be masked to read SMS (slave mode selection) only.
> 
> Fixes: 9eba381 ("iio: make stm32 trigger driver use
> INDIO_HARDWARE_TRIGGERED mode")
> 
> Signed-off-by: Fabrice Gasnier <fabrice.gasnier@st.com>
Applied to the fixes-togreg branch of iio.git.

THanks,

Jonathan
> ---
>  drivers/iio/trigger/stm32-timer-trigger.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/iio/trigger/stm32-timer-trigger.c b/drivers/iio/trigger/stm32-timer-trigger.c
> index 14e6eb0..25ad6ab 100644
> --- a/drivers/iio/trigger/stm32-timer-trigger.c
> +++ b/drivers/iio/trigger/stm32-timer-trigger.c
> @@ -485,7 +485,7 @@ static int stm32_get_trigger_mode(struct iio_dev *indio_dev,
>  
>  	regmap_read(priv->regmap, TIM_SMCR, &smcr);
>  
> -	return smcr == TIM_SMCR_SMS ? 0 : -EINVAL;
> +	return (smcr & TIM_SMCR_SMS) == TIM_SMCR_SMS ? 0 : -EINVAL;
>  }
>  
>  static const struct iio_enum stm32_trigger_mode_enum = {