LPTIM is not available in STOP3 mode, so RTC needs to be used instead.
This code usese similar approach as STM32WBAx for suspend to ram.
The STOP3 is disabled by default in device tree.
Signed-off-by: Adam Berlinger <adam.berlinger@st.com>
Add support for a backup standby timer in STM32 LPTIM driver for cases
when the LPTIM is not available (ie standby low power mode).
A counter (typically RTC) is used for such a case.
Signed-off-by: Guillaume Gautier <guillaume.gautier-ext@st.com>
Now that STM32_LPTIM_CLOCK choice symbol is defined from device tree,
remove the prompt which was defining it as a user selectable entry.
Remove the warning related to possible symbol misalignment with
device tree setting.
Signed-off-by: Erwan Gouriou <erwan.gouriou@st.com>
A specific check is implemented lptim driver in order to ensure global
platform clock/tick configuration is in line with recommendations.
To respect portability principles, don't error out when a config
conflict is detected but generates a warning instead.
Also, since these are only recommendations, provide an option to override
the check. Besides automatically override when ZTEST is enabled, as some
kernel tests specifically configure tick freq to 100.
Signed-off-by: Erwan Gouriou <erwan.gouriou@linaro.org>
Similarly to other drivers, use auto generated DT_HAS_<COMPAT> Kconfig
symbol to control use of STM32 lptim driver.
Signed-off-by: Erwan Gouriou <erwan.gouriou@linaro.org>
Instead of relying on Kconfig, use dt inputs to configure LPTIM domain
clck (LSI/lSE).
Clock control dedicated APIs are used for configuration and get the
frequency of domain clock in use.
Constants macros used previously to store frequency and time base are
converted to static global variables.
Some code was set up specifically to keep compatibility with targets
that still use Kconfig to configure domain clock. This will be removed
after a deprecation period.
Signed-off-by: Erwan Gouriou <erwan.gouriou@linaro.org>
With the introduction of `EXPERIMENTAL` and `WARN_EXPERIMENTAL` in
Zephyr all drivers settings having `[EXPERIMENTAL]` in their
prompt has has been updated to include `select EXPERIMENTAL` so that
developers can enable warnings when experimental features are enabled.
Signed-off-by: Torsten Rasmussen <Torsten.Rasmussen@nordicsemi.no>
Timer STM32 LPTIM currently supports 2 clocks sources: LSE & LSI.
LSE (external) is defined as default but its availability depends
on board support package and then may not be available.
This ends up in situations where users have LSE implicitly selected
while no crystal is available on board, leading to non functional
LPTIM.
To avoid this situation, makes LSI clock, which is always available
(since internal to the SoC), the default LPTIM source clock.
Then, default case will be functional. Users will then be able to
select LSE if needed.
Signed-off-by: Erwan Gouriou <erwan.gouriou@linaro.org>
The stm32_lptim driver is hardcoded to use lptim1.
Make the Kconfig option depend on the presence of the node label in the
devicetree, so that there's one less list of supported SoC to keep track
of.
Signed-off-by: Fabio Baltieri <fabio.baltieri@gmail.com>
- Remove SYS_ prefix
- shorten POWER_MANAGEMENT to just PM
- DEVICE_POWER_MANAGEMENT -> PM_DEVICE
and use PM_ as the prefix for all PM related Kconfigs
Signed-off-by: Anas Nashif <anas.nashif@intel.com>
The LPTIM driver is supposed to be only available when the SoC is
allowed to enter power sleep mode, as described in commit f30f5fff72
("drivers: timer: lptim is [EXPERIMENTAL] for stm32 soc series only").
For that it should depends on SYS_POWER_MANAGEMENT (which gates the
SYS_POWER_SLEEP_STATES and SYS_POWER_DEEP_SLEEP_STATES options) instead
of DEVICE_POWER_MANAGEMENT.
Fixes#25989
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
Activation of the LPTIMER is valid for SLEEP MODE only
The choice of the lptim clock source is STM32_LPTIM_CLOCK
set the LSE in first position to have as default value
Signed-off-by: Francois Ramu <francois.ramu@st.com>
Adam Berlinger
Guillaume Gautier
Erwan Gouriou
Erwan Gouriou
Torsten Rasmussen
Fabio Baltieri
Francois Ramu
Anas Nashif
Aurelien Jarno
Ulf Magnusson