| From | Greg Kroah-Hartman <> | Subject | [PATCH 4.13 088/160] iio: trigger: stm32-timer: fix a corner case to write preset | Date | Tue, 10 Oct 2017 21:50:16 +0200 |
| |
4.13-stable review patch. If anyone has any objections, please let me know.
------------------
From: Fabrice Gasnier <fabrice.gasnier@st.com>
commit b7a9776c1f9443326632486fcbd82dca82f8511e upstream.
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> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
--- drivers/iio/trigger/stm32-timer-trigger.c | 1 + 1 file changed, 1 insertion(+)
--- a/drivers/iio/trigger/stm32-timer-trigger.c +++ b/drivers/iio/trigger/stm32-timer-trigger.c @@ -138,6 +138,7 @@ static void stm32_timer_stop(struct stm3 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);
|