linux-stable/drivers/counter
Fabrice Gasnier 3e705059e5 counter: stm32-lptimer-cnt: fix the check on arr and cmp registers update
[ Upstream commit fd5ac974fc ]

The ARR (auto reload register) and CMP (compare) registers are
successively written. The status bits to check the update of these
registers are polled together with regmap_read_poll_timeout().
The condition to end the loop may become true, even if one of the register
isn't correctly updated.
So ensure both status bits are set before clearing them.

Fixes: d8958824cf ("iio: counter: Add support for STM32 LPTimer")
Signed-off-by: Fabrice Gasnier <fabrice.gasnier@foss.st.com>
Link: https://lore.kernel.org/r/20221123133609.465614-1-fabrice.gasnier@foss.st.com/
Signed-off-by: William Breathitt Gray <william.gray@linaro.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2022-12-31 13:26:26 +01:00
..
104-quad-8.c counter: 104-quad-8: Fix race getting function mode and direction 2022-11-04 00:00:23 +09:00
Kconfig counter: 104-quad-8: Add COMPILE_TEST depends 2022-03-18 14:04:30 +01:00
Makefile counter: Add character device interface 2021-10-17 10:53:52 +01:00
counter-chrdev.c counter: add defaults to switch-statements 2022-03-18 14:04:30 +01:00
counter-chrdev.h counter: Add character device interface 2021-10-17 10:53:52 +01:00
counter-core.c counter: Set counter device name 2022-03-18 14:04:30 +01:00
counter-sysfs.c counter: Stop using dev_get_drvdata() to get the counter device 2022-03-15 19:24:13 +01:00
counter-sysfs.h counter: Internalize sysfs interface code 2021-10-17 10:52:58 +01:00
ftm-quaddec.c counter: ftm-quaddec: Convert to new counter registration 2021-12-30 17:44:07 +01:00
intel-qep.c counter: intel-qep: Convert to new counter registration 2021-12-30 17:44:07 +01:00
interrupt-cnt.c counter: interrupt-cnt: add counter_push_event() 2022-03-18 14:04:30 +01:00
microchip-tcb-capture.c counter: microchip-tcb-capture: Handle Signal1 read and Synapse 2022-11-04 00:00:23 +09:00
stm32-lptimer-cnt.c counter: stm32-lptimer-cnt: fix the check on arr and cmp registers update 2022-12-31 13:26:26 +01:00
stm32-timer-cnt.c counter: stm32-timer-cnt: Convert to new counter registration 2021-12-30 17:44:07 +01:00
ti-eqep.c counter: ti-eqep: Convert to new counter registration 2021-12-30 17:44:07 +01:00