On Wed, 2026-06-03 at 13:00 +0000, Tudor Ambarus wrote: > Add driver for the Thermal Management Unit (TMU) managed via the Alive > Clock and Power Manager (ACPM), found on Samsung Exynos SoCs such as > the Google GS101. > > The TMU on the GS101 utilizes a hybrid management model shared between > the Application Processor (AP) and the ACPM firmware. The driver > maintains direct memory-mapped access to the TMU interrupt pending > registers to identify thermal events, while delegating functional > tasks - such as sensor initialization, threshold configuration, and > temperature acquisition, to the ACPM firmware via the ACPM IPC > protocol. > > Signed-off-by: Tudor Ambarus <[email protected]> > Acked-by: Krzysztof Kozlowski <[email protected]> > --- > drivers/thermal/samsung/Kconfig | 19 ++ > drivers/thermal/samsung/Makefile | 2 + > drivers/thermal/samsung/acpm-tmu.c | 651 > +++++++++++++++++++++++++++++++++++++ > 3 files changed, 672 insertions(+) > > diff --git a/drivers/thermal/samsung/Kconfig b/drivers/thermal/samsung/Kconfig > index f4eff5a41a84..bf9fb52e848e 100644 > --- a/drivers/thermal/samsung/Kconfig > +++ b/drivers/thermal/samsung/Kconfig > @@ -9,3 +9,22 @@ config EXYNOS_THERMAL > the TMU, reports temperature and handles cooling action if defined. > This driver uses the Exynos core thermal APIs and TMU configuration > data from the supported SoCs. > + > +config EXYNOS_ACPM_THERMAL > + tristate "Exynos ACPM thermal management unit driver" > + depends on THERMAL_OF > + depends on HAS_IOMEM > + depends on EXYNOS_ACPM_PROTOCOL > + default ARCH_EXYNOS > + help > + Support for the Thermal Management Unit (TMU) on Samsung Exynos SoCs > + utilizing the ACPM IPC protocol, such as the Google GS101. > + > + The TMU on these platforms is managed through a hybrid architecture. > + This driver handles direct register access for thermal interrupt > status > + monitoring and communicates with the Alive Clock and Power Manager > + (ACPM) firmware via the ACPM IPC protocol for functional sensor > control > + and configuration. > + > + Select this if you want to monitor device temperature and enable > + thermal mitigation on Samsung Exynos ACPM based devices.
If you're sending a new version, it might make sense to add a brief clarification to the existing CONFIG_EXYNOS_THERMAL in that it only supports (the older?) non-ACPM designs. In any case: Reviewed-by: André Draszik <[email protected]>
