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| author | Fabrice Gasnier <fabrice.gasnier@st.com> | 2017-09-18 12:05:31 +0200 |
|---|---|---|
| committer | Jonathan Cameron <Jonathan.Cameron@huawei.com> | 2017-09-24 13:09:57 +0100 |
| commit | b7a9776c1f9443326632486fcbd82dca82f8511e (patch) | |
| tree | c189564527a6dd09e643d384d0d2c4e3443f8f5e /drivers/iio | |
| parent | 0a56eabc4e3f730782e4a9f3af4f60aa03a8a849 (diff) | |
| download | linux-b7a9776c1f9443326632486fcbd82dca82f8511e.tar.gz linux-b7a9776c1f9443326632486fcbd82dca82f8511e.tar.bz2 linux-b7a9776c1f9443326632486fcbd82dca82f8511e.zip | |
iio: trigger: stm32-timer: fix a corner case to write preset
Balance timer start routine that sets ARPE: clear it in stop routine.
This fixes a corner case, when timer is used successively as trigger
(with sampling_frequency start/stop routines), then as a counter
(with preset).
Fixes: 93fbe91b5521 ("iio: Add STM32 timer trigger driver")
Signed-off-by: Fabrice Gasnier <fabrice.gasnier@st.com>
Cc: <Stable@vger.kernel.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Diffstat (limited to 'drivers/iio')
| -rw-r--r-- | drivers/iio/trigger/stm32-timer-trigger.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/iio/trigger/stm32-timer-trigger.c b/drivers/iio/trigger/stm32-timer-trigger.c index 4cec28af3ecf..a30ba6e1dfec 100644 --- a/drivers/iio/trigger/stm32-timer-trigger.c +++ b/drivers/iio/trigger/stm32-timer-trigger.c @@ -174,6 +174,7 @@ static void stm32_timer_stop(struct stm32_timer_trigger *priv) clk_disable(priv->clk); /* Stop timer */ + regmap_update_bits(priv->regmap, TIM_CR1, TIM_CR1_ARPE, 0); regmap_update_bits(priv->regmap, TIM_CR1, TIM_CR1_CEN, 0); regmap_write(priv->regmap, TIM_PSC, 0); regmap_write(priv->regmap, TIM_ARR, 0); |