Merge tag 'timers-clocksource-2025-05-25' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull clocksource updates from Thomas Gleixner:
"Updates for clocksource/clockevent drivers:

-

Merge tag 'timers-clocksource-2025-05-25' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull clocksource updates from Thomas Gleixner:
"Updates for clocksource/clockevent drivers:

- The final conversion of text formatted device tree binding to
schemas

- A new driver fot the System Timer Module on S32G NXP SoCs

- A new driver fot the Econet HPT timer

- The usual improvements and device tree binding updates"

* tag 'timers-clocksource-2025-05-25' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (31 commits)
clocksource/drivers/renesas-ostm: Unconditionally enable reprobe support
dt-bindings: timer: renesas,ostm: Document RZ/V2N (R9A09G056) support
dt-bindings: timer: Convert marvell,armada-370-timer to DT schema
dt-bindings: timer: Convert ti,keystone-timer to DT schema
dt-bindings: timer: Convert st,spear-timer to DT schema
dt-bindings: timer: Convert socionext,milbeaut-timer to DT schema
dt-bindings: timer: Convert snps,arc-timer to DT schema
dt-bindings: timer: Convert snps,archs-rtc to DT schema
dt-bindings: timer: Convert snps,archs-gfrc to DT schema
dt-bindings: timer: Convert lsi,zevio-timer to DT schema
dt-bindings: timer: Convert jcore,pit to DT schema
dt-bindings: timer: Convert img,pistachio-gptimer to DT schema
dt-bindings: timer: Convert ezchip,nps400-timer to DT schema
dt-bindings: timer: Convert cirrus,clps711x-timer to DT schema
dt-bindings: timer: Convert altr,timer-1.0 to DT schema
dt-bindings: timer: Add ESWIN EIC7700 CLINT
clocksource/drivers: Add EcoNet Timer HPT driver
dt-bindings: timer: Add EcoNet EN751221 "HPT" CPU Timer
dt-bindings: timer: Convert arm,mps2-timer to DT schema
dt-bindings: timer: Add Sophgo SG2044 ACLINT timer
...

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Merge tag 'timers-v6.16-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/daniel.lezcano/linux into timers/drivers

- Add the System Timer Module driver for the S32G NXP platforms
(Daniel L

Merge tag 'timers-v6.16-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/daniel.lezcano/linux into timers/drivers

- Add the System Timer Module driver for the S32G NXP platforms
(Daniel Lezcano)

- Convert the remaining text formatted DT bindings in schemas (Rob
Herring)

- Fix a Kconfig dependency on the atmel TCB driver to prevent a
compilation warning when CONFIG_OF is disabled (Arnd Bergmann)

- Fix self-pinging and support gettimeleft in the watchdog part of the tegra186
timer (Pohsun Su)

- Add the Sophgo SG2044 ACLINT timer binding (Inochi Amaoto)

- Add the EcoNet Timer HPT driver along with the DT bindings (Caleb
James DeLisle)

- Add the Renesas R9A09G056 compatible string bindings and enable
reprobe support on the Renesas OSTM (Lab Prabhakar)

Link: https://lore.kernel.org/all/aCy43_obHEdIpwWg@mai.linaro.org

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clocksource/drivers/nxp-timer: Add the System Timer Module for the s32gx platforms

STM supports commonly required system and application software timing
functions. STM includes a 32-bit count-up tim

clocksource/drivers/nxp-timer: Add the System Timer Module for the s32gx platforms

STM supports commonly required system and application software timing
functions. STM includes a 32-bit count-up timer and four 32-bit
compare channels with a separate interrupt source for each
channel. The timer is driven by the STM module clock divided by an
8-bit prescale value (1 to 256).

STM has the following features:
• One 32-bit count-up timer with an 8-bit prescaler
• Four 32-bit compare channels
• An independent interrupt source for each channel
• Ability to stop the timer in Debug mode

The s32g platform is declined into two versions, the s32g2 and the
s32g3. The former has a STM block with 8 timers and the latter has 12
timers.

The platform is designed to have one usable STM instance per core on
the system which is composed of 3 x Cortex-M3 + 4 Cortex-A53 for the
s32g2 and 3 x Cortex-M3 + 8 Cortex-A53 for the s32g3.

There is a special STM instance called STM_TS which is dedicated to
the timestamp. The 7th STM instance STM_07 is directly tied to the
STM_TS which means it is not usable as a clockevent.

The driver instantiate each STM described in the device tree as a
clocksource and a clockevent conforming to the reference manual even
if the Linux system does not use all of the clocksource. Each
clockevent will have a cpumask set for a specific CPU.

Given the counter is shared between the clocksource and the
clockevent, the STM module can not be disabled by one or another so
the refcounting mechanism is used to stop the counter when it reaches
zero and to start it when it is one. The suspend and resume relies on
the refcount to stop the module.

As the device tree will have multiple STM entries, the driver can be
probed in parallel with the async option but it is not enabled
yet. However, the driver code takes care of preventing a race by
putting a lock to protect the number of STM instances global variable
which means it is ready to support the option when enough testing will
be done with the underlying time framework.

Cc: Ghennadi Procopciuc <ghennadi.procopciuc@oss.nxp.com>
Cc: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Cc: Thomas Fossati <thomas.fossati@linaro.org>
Suggested-by: Ghennadi Procopciuc <ghennadi.procopciuc@nxp.com>
Link: https://lore.kernel.org/r/20250417151623.121109-3-daniel.lezcano@linaro.org
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>

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