[PATCH v6 3/7] clocksource: stm32-lptimer: add support for stm32mp25

[Daniel Lezcano]

On Tue, Apr 29, 2025 at 02:51:29PM +0200, Fabrice Gasnier wrote:
> On stm32mp25, DIER (former IER) must only be modified when the lptimer
> is enabled. On earlier SoCs, it must be only be modified when it is
> disabled. There's also a new DIEROK flag, to ensure register access
> has completed.
> Add a new "set_evt" routine to be used on stm32mp25, called depending
> on the version register, read by the MFD core (LPTIM_VERR).
> 
> Signed-off-by: Patrick Delaunay <patrick.delaunay at foss.st.com>
> Signed-off-by: Fabrice Gasnier <fabrice.gasnier at foss.st.com>
> ---
> Changes in V6:
> - Fixed warning reported by kernel test robot in
>   https://lore.kernel.org/oe-kbuild-all/202504261456.aCATBoYN-lkp@intel.com/
>   use FIELD_GET() macro
> Changes in V5:
> - Added a delay after timer enable, it needs two clock cycles.
> Changes in V4:
> - Daniel suggests to encapsulate IER write into a separate function
>   that manages the enabling/disabling of the LP timer. In addition,
>   DIEROK and ARROK flags checks have been added. So adopt a new routine
>   to set the event into ARR register and enable the interrupt.
> Changes in V2:
> - rely on fallback compatible as no specific .data is associated to the
>   driver. Use version data from MFD core.
> - Added interrupt enable register access update in (missed in V1)
> ---

Acked-by: Daniel Lezcano <daniel.lezcano at linaro.org>
-- 

 <http://www.linaro.org/> Linaro.org │ Open source software for ARM SoCs

Follow Linaro:  <http://www.facebook.com/pages/Linaro> Facebook |
<http://twitter.com/#!/linaroorg> Twitter |
<http://www.linaro.org/linaro-blog/> Blog