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>
Fix timing in suspend-to-ram when using STM32WBA.
Switch to use RTC timer should be done only when idle is set
and LPTIM clocks should be switched off
Signed-off-by: Adam Berlinger <adam.berlinger@st.com>
Clock must be restored as soon as the SoC leaves standby.
Keep the logic inside the SoC instead of delegate it to the pm
subsystem.
Signed-off-by: Flavio Ceolin <flavio.ceolin@intel.com>
The LL_APBx_GRPn_ReleaseReset clears reset bit in RCC,
however this bit is reset by default. Code that set
this bit was removed in previous commit
0856e99155
Keepint the autonomous clocks for STM32U5 family.
Signed-off-by: Adam Berlinger <adam.berlinger@st.com>
When CONFIG_SYSTEM_SLOPPY_IDLE is not set, then system
can sleep for -1 means waking Up at the max possible
counter value (INT_MAX)
When CONFIG_SYSTEM_SLOPPY_IDLE is set sleeping K_TICKS_FOREVER
means never wakingUp
Signed-off-by: Francois Ramu <francois.ramu@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>
Remove initialization of static variable to 0 to prevent resetting the
value when reinitializing the driver after resume from standby.
This has no impact since static variables are initialized to 0 by default.
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>
With low LPTIM freq when prescaler is set to 16 or 32,
the CONFIG_SYS_CLOCK_TICKS_PER_SEC must be reduced to
LPTIM CLOCK_/prescaler to avoid spurious timer wakeup activity.
Assert error if the CONFIG_SYS_CLOCK_TICKS_PER_SEC
is not compatible with the lptim clock freq.
Signed-off-by: Francois Ramu <francois.ramu@st.com>
Rename to LPTIM_PRESCALER, the <st,property> prescaler of
the stm32 LPTimer. This commit gives better readability than
LPTIM_CLOCK_RATIO.
Signed-off-by: Francois Ramu <francois.ramu@st.com>
Revert "drivers: timer: lptim timer clock on stm32u5 has a prescaler"
This reverts commit c14670abea.
Signed-off-by: Francois Ramu <francois.ramu@st.com>
Timer "drivers" do not use the device model infrastructure, they are
singletons with a SYS_INIT call. This means they do not have to include
device.h but init.h. Things worked because device.h includes init.h.
Signed-off-by: Gerard Marull-Paretas <gerard@teslabs.com>
This PR is Calling "clock_control_on" and checking return value
(as is done elsewhere 10 out of 11 times)
CID 322066: Error handling issues (CHECKED_RETURN)
Signed-off-by: Francois Ramu <francois.ramu@st.com>
The stm32_lptim_wait_ready() is waiting for the DIEROK flag
with a while loop. It should not be repeated.
Signed-off-by: Francois Ramu <francois.ramu@st.com>
This PR will divide the LPTIM clock freq to increase the max timeout.
Only one LPTIM instance is considered for PM timer.
The input freq becomes a fraction of the internal PCLK
source (mainly LSE clock). As the tick per sec does not change,
the minimum lptim counter must always be >0.
Signed-off-by: Francois Ramu <francois.ramu@st.com>
On the stm32U5, when modifying the DIER register of the LPTIM peripheral,
a new write operation to can only be performed when the previous write
operation is completed and before going-on.
Signed-off-by: Francois Ramu <francois.ramu@st.com>
The init infrastructure, found in `init.h`, is currently used by:
- `SYS_INIT`: to call functions before `main`
- `DEVICE_*`: to initialize devices
They are all sorted according to an initialization level + a priority.
`SYS_INIT` calls are really orthogonal to devices, however, the required
function signature requires a `const struct device *dev` as a first
argument. The only reason for that is because the same init machinery is
used by devices, so we have something like:
```c
struct init_entry {
int (*init)(const struct device *dev);
/* only set by DEVICE_*, otherwise NULL */
const struct device *dev;
}
```
As a result, we end up with such weird/ugly pattern:
```c
static int my_init(const struct device *dev)
{
/* always NULL! add ARG_UNUSED to avoid compiler warning */
ARG_UNUSED(dev);
...
}
```
This is really a result of poor internals isolation. This patch proposes
a to make init entries more flexible so that they can accept sytem
initialization calls like this:
```c
static int my_init(void)
{
...
}
```
This is achieved using a union:
```c
union init_function {
/* for SYS_INIT, used when init_entry.dev == NULL */
int (*sys)(void);
/* for DEVICE*, used when init_entry.dev != NULL */
int (*dev)(const struct device *dev);
};
struct init_entry {
/* stores init function (either for SYS_INIT or DEVICE*)
union init_function init_fn;
/* stores device pointer for DEVICE*, NULL for SYS_INIT. Allows
* to know which union entry to call.
*/
const struct device *dev;
}
```
This solution **does not increase ROM usage**, and allows to offer clean
public APIs for both SYS_INIT and DEVICE*. Note that however, init
machinery keeps a coupling with devices.
**NOTE**: This is a breaking change! All `SYS_INIT` functions will need
to be converted to the new signature. See the script offered in the
following commit.
Signed-off-by: Gerard Marull-Paretas <gerard.marull@nordicsemi.no>
init: convert SYS_INIT functions to the new signature
Conversion scripted using scripts/utils/migrate_sys_init.py.
Signed-off-by: Gerard Marull-Paretas <gerard.marull@nordicsemi.no>
manifest: update projects for SYS_INIT changes
Update modules with updated SYS_INIT calls:
- hal_ti
- lvgl
- sof
- TraceRecorderSource
Signed-off-by: Gerard Marull-Paretas <gerard.marull@nordicsemi.no>
tests: devicetree: devices: adjust test
Adjust test according to the recently introduced SYS_INIT
infrastructure.
Signed-off-by: Gerard Marull-Paretas <gerard.marull@nordicsemi.no>
tests: kernel: threads: adjust SYS_INIT call
Adjust to the new signature: int (*init_fn)(void);
Signed-off-by: Gerard Marull-Paretas <gerard.marull@nordicsemi.no>
This commit finish to fix the bug describe by 85e2a0679a68f02f7ef.
With the previous correction, the uptime read could be in the past:
if the counter rewinds just after testing ARRM flag, we had lost
some counts.
Signed-off-by: Julien D'Ascenzio <julien.dascenzio@paratronic.fr>
On the stm32U5, when modifying the DIER register of the LPTIM peripheral,
a new write operation to can only be performed when the previous write
operation is completed and before going-on.
This is done with a function call for better readability.
Signed-off-by: Francois Ramu <francois.ramu@st.com>
The stm32 devices shows a x2 factor on the LPTIM1,3,4
clock source but it acts as a prescaler.
The max lptim counter (timebase) is counting 4 sec
In that case, the LPTIM count unit is double.
Signed-off-by: Francois Ramu <francois.ramu@st.com>
Bug occurs when polling kernel uptime. Uptime was suddenly
jumping because lptim counter was counted twice
(from CNT and ARR registers) in case reload happens between
values are fetched.
Signed-off-by: Cyril Fougeray <cyril.fougeray@worldcoin.org>
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>
In some configurations, a udf instruction may be generated
when compiling code where static global variable lptim_clock_freq is
used as a divisor.
To avoid this, initialize variable on declaration so that compiler
could see that it can't be used uninitialized in this division.
Signed-off-by: Erwan Gouriou <erwan.gouriou@linaro.org>
On L0 series, LSI runs at 37KHz while LPTIM driver only supports speeds
up to 32768Hz (to avoid counter overflow). Consequence is a time running
faster than reality (x1.13)
Solution to this is the implementation of the LPTIM prescaler support.
While moving driver configuration from Kconfig to DT, this case was
not taken into account and the effect was LPTIM counter overflow which
consequence is worse than the slightly faster timer.
Reproduce the initial behavior with this piece of code that will be
removed once prescaler support is available.
Signed-off-by: Erwan Gouriou <erwan.gouriou@linaro.org>
When using LPTIM as tick source, tick freq (SYS_CLOCK_TICKS_PER_SEC)
needs to be adapted to get a precise tick to LPTIM freq ratio.
This adaptation was done easily using Kconfig up to now (under
soc/st_stm32/common/Kconfig.defconfig.series).
Since driver is configured using device tree, this method should
be adapted. For the LSI case (default Kconfig case), rely on the
existing mecanism, which is also still used by OOT users.
For the LSE case, force the value manually in boards forlder.
Signed-off-by: Erwan Gouriou <erwan.gouriou@linaro.org>
Following transition of lptim timer configuration from Kconfig to DT,
a warning message was set to inform users about this deprecation.
Due to errors in CI this message had to be removed while fixing the related
issues.
Now these issues are fixed, set the deprecation message again.
Signed-off-by: Erwan Gouriou <erwan.gouriou@linaro.org>
It is frequent to find variable definitions like this:
```c
static const struct device *dev = DEVICE_DT_GET(...)
```
That is, module level variables that are statically initialized with a
device reference. Such value is, in most cases, never changed meaning
the variable can also be declared as const (immutable). This patch
constifies all such cases.
Signed-off-by: Gerard Marull-Paretas <gerard.marull@nordicsemi.no>
It appears that some in tree boards still enable lptim w/o configured
domain clocks.
Remove this deprecation message the time a clean up is done fully.
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>
Continue conversion of LPTIM driver to device tree based configuration.
Get clock configuration from device tree and use clock_control API for
bus clock configuration
Signed-off-by: Erwan Gouriou <erwan.gouriou@linaro.org>
Start converting LPTIM driver to device tree based configuration and
support of other instances.
First: get base address and IRQ using dt instance
Signed-off-by: Erwan Gouriou <erwan.gouriou@linaro.org>
The waiting of the flag ARROK could be quite long (100µs-200µs in my
test). During this time, the interrupts are locked that is not
recommended. To avoid this, we manage the update of the autoreload value
in interruption
Signed-off-by: Julien D'Ascenzio <julien.dascenzio@paratronic.fr>
Not all platforms support setting the LSE driving capability, causing
the build to fail for platform such as the STM32L072 if compiled with
CONFIG_STM32_LPTIM_CLOCK_LSE=y.
Adding an #ifdef guard around the call to skip it if not defined in the
HAL.
Signed-off-by: Fabio Baltieri <fabio.baltieri@gmail.com>
In order to bring consistency in-tree, migrate all drivers to the new
prefix <zephyr/...>. Note that the conversion has been scripted, refer
to #45388 for more details.
Signed-off-by: Gerard Marull-Paretas <gerard.marull@nordicsemi.no>
Make the LSE driving capability configurable for the STM32 series.
Fixes#44737.
Signed-off-by: Benedikt Schmidt <benedikt.schmidt@embedded-solutions.at>
The weak symbol sys_clock_driver_init has been removed, therefore moving
the init responsability to the drivers themselves. As a result, the init
function has now been made static on all drivers and moved to the
bottom, following the convention used in other areas.
Signed-off-by: Gerard Marull-Paretas <gerard.marull@nordicsemi.no>
Add the lptim1 device node definition and enable the corresponding
exti interrupt in sys_clock_driver_init().
Signed-off-by: Fabio Baltieri <fabio.baltieri@gmail.com>
This is another API that is being used in all timer drivers and is not
internal to the clock subsystem. Remove the leading z_ and make promote
it to a cross-subsystem API.
Signed-off-by: Anas Nashif <anas.nashif@intel.com>
The clock/timer APIs are not application facing APIs, however, similar
to arch_ and a few other APIs they are available to implement drivers
and add support for new hardware and are documented and available to be
used outside of the clock/kernel subsystems.
Remove the leading z_ and provide them as clock_* APIs for someone
writing a new timer driver to use.
Signed-off-by: Anas Nashif <anas.nashif@intel.com>
Adam Berlinger
Flavio Ceolin
Francois Ramu
Guillaume Gautier
Erwan Gouriou
Gerard Marull-Paretas
Gerard Marull-Paretas
Pieter De Gendt
Julien D'Ascenzio
Cyril Fougeray
Erwan Gouriou
Fabio Baltieri
Benedikt Schmidt
Anas Nashif