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iio: trigger: stm32-timer: fix get trigger mode 

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>
Cc: <Stable@vger.kernel.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
This commit is contained in:
Fabrice Gasnier 2017-08-03 11:22:17 +02:00 committed by Jonathan Cameron
parent fdd0d32eb9
commit a359bb2a55
1 changed files with 1 additions and 1 deletions
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2
drivers/iio/trigger/stm32-timer-trigger.c
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@ -485,7 +485,7 @@ static int stm32_get_trigger_mode(struct iio_dev *indio_dev,
regmap_read(priv->regmap, TIM_SMCR, &smcr); 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 = { static const struct iio_enum stm32_trigger_mode_enum = {