Re: [PATCH v6 0/7] Add STM32MP25 LPTIM support: MFD, PWM, IIO, counter, clocksource

[Lee Jones]

On Tue, 29 Apr 2025, Fabrice Gasnier wrote:

> This series adds support for STM32MP25 to MFD PWM, IIO, counter and
> clocksource low-power timer (LPTIM) drivers.
> This new variant is managed by using a new DT compatible string, hardware
> configuration and version registers.
> It comes with a slightly updated register set, some new features and new
> interconnect signals inside the SoC.
> Same feature list as on STM32MP1x is supported currently.
> The device tree files add all instances in stm32mp251 dtsi file.
> 
> Changes in V6
> ---
> - Fixed kernel test robot warning
>   https://lore.kernel.org/oe-kbuild-all/202504261456.aCATBoYN-lkp@xxxxxxxxx/
> 
> Changes in V5
> ---
> - Add a necessary delay in clocksource driver, when enabling the timer.
> - Add collected Acks
> - Dropped IIO trigger patch as applied by Jonathan [1] (no dependency)
>   [1] https://lore.kernel.org/all/20250331110435.26157ebe@jic23-huawei/
> 
> Changes in V4
> ---
> - Simplify IIO trigger driver as per Jonathan's comments.
> - Rework clocksource driver: encapsulate mp25 changes in separate function
>   after Daniel's suggestion.
> - Add some definitions to MFD header.
> 
> Changes in V3
> ---
> - Yaml indentation issue fixed, reported by Rob's bot
> 
> Changes in V2
> ---
> - Review comments from Krzysztof
>   - Adopt compatible fallback in dt-bindings and driver
>   - drivers: drop "st,stm32mp25-..." compatibles when unused (e.g. no .data)
>   - counter driver: no update (patch dropped)
>   - defconfig: only enable the necessary config for upstream board
>   - add lptimer DT node in stm32mp257f-ev1 board
> - Add missing management of IER access for stm32mp25
> 
> Fabrice Gasnier (7):
>   dt-bindings: mfd: stm32-lptimer: add support for stm32mp25
>   mfd: stm32-lptimer: add support for stm32mp25
>   clocksource: stm32-lptimer: add support for stm32mp25
>   pwm: stm32-lp: add support for stm32mp25
>   arm64: defconfig: enable STM32 LP timer clockevent driver
>   arm64: dts: st: add low-power timer nodes on stm32mp251
>   arm64: dts: st: use lptimer3 as tick broadcast source on
>     stm32mp257f-ev1
> 
>  .../bindings/mfd/st,stm32-lptimer.yaml        |  40 +++-
>  arch/arm64/boot/dts/st/stm32mp251.dtsi        | 177 ++++++++++++++
>  arch/arm64/boot/dts/st/stm32mp257f-ev1.dts    |   8 +
>  arch/arm64/configs/defconfig                  |   2 +
>  drivers/clocksource/timer-stm32-lp.c          |  61 ++++-
>  drivers/mfd/stm32-lptimer.c                   |  33 ++-
>  drivers/pwm/pwm-stm32-lp.c                    | 219 +++++++++++++++---
>  include/linux/mfd/stm32-lptimer.h             |  37 ++-
>  8 files changed, 537 insertions(+), 40 deletions(-)

Is it just the Clocksource Ack that we're waiting on now?

-- 
Lee Jones [李琼斯]