| From: |
| Manaf Meethalavalappu Pallikunhi <manaf.pallikunhi-AT-oss.qualcomm.com> |
| To: |
| Rob Herring <robh-AT-kernel.org>, Krzysztof Kozlowski <krzk+dt-AT-kernel.org>, Conor Dooley <conor+dt-AT-kernel.org>, "Rafael J. Wysocki" <rafael-AT-kernel.org>, Bjorn Andersson <andersson-AT-kernel.org>, Konrad Dybcio <konradybcio-AT-kernel.org>, Daniel Lezcano <daniel.lezcano-AT-oss.qualcomm.com> |
| Subject: |
| [PATCH v2 0/3] Add Qualcomm SPEL powercap driver |
| Date: |
| Sat, 20 Jun 2026 02:09:07 +0530 |
| Message-ID: |
| <20260620-qcom_spel_driver_upstream-v2-0-a3ee6837c18f@oss.qualcomm.com> |
| Cc: |
| Gaurav Kohli <gaurav.kohli-AT-oss.qualcomm.com>, linux-arm-msm-AT-vger.kernel.org, devicetree-AT-vger.kernel.org, linux-kernel-AT-vger.kernel.org, linux-pm-AT-vger.kernel.org, Manaf Meethalavalappu Pallikunhi <manaf.pallikunhi-AT-oss.qualcomm.com> |
| Archive-link: |
| Article |
This patch series introduces support for Qualcomm's SPEL (SoC Power
and Electrical Limits) hardware, which provides power monitoring and
limiting capabilities for various power domains in Qualcomm SoCs.
The SPEL hardware enables:
- Real-time energy consumption monitoring across multiple power domains
- Hardware-enforced power limits with configurable time windows
- Support for up to 4 power limits (PL1-PL4) per domain
- Hierarchical power domain organization (SYS -> SOC -> subsystems)
The driver integrates with the Linux powercap framework, exposing SPEL
capabilities through standard sysfs interfaces. This allows userspace
applications and thermal management daemons to monitor energy consumption
and configure power limits for optimal power/performance balance.
Signed-off-by: Manaf Meethalavalappu Pallikunhi <manaf.pallikunhi@oss.qualcomm.com>
---
Changes in v2:
- Fixed DT issues: corrected unit-address mismatch and made compatible
platform-specific.(Konrad/Krzysztof)
- Cleaned up bitfield handling: switched to GENMASK, FIELD_* macros.(Konrad)
- Converted hex values to lowercase and simplified array definitions.(Konrad)
- used devm_platform_ioremap_resource_byname().(Konrad)
- Refactored data structures: merged domain data into spel_domain_info
and removed hardcoded limits using ARRAY_SIZE().(Daniel)
- Added bounds checks (TIME_WINDOW_MAX) and fixed time window RMW
handling (preserving reserved bits + firmware notify).(Sashiko)
- Resolved use-after-free, replaced allocation strategy, and
added proper cleanup in .release().(Sashiko)
- Updated time window calculation logic.
- Removed cyclic dependency, improved validation logic, and aligned
naming consistency.(Daniel)
- Link to v1: https://lore.kernel.org/r/20260519-qcom_spel_driver_upstr...
---
Manaf Meethalavalappu Pallikunhi (3):
dt-bindings: power: limits: Describe Qualcomm SPEL hardware
powercap: qcom: Add SPEL powercap driver
arm64: dts: qcom: glymur: Enable SPEL powercap driver
.../bindings/power/limits/qcom,spel.yaml | 47 ++
MAINTAINERS | 7 +
arch/arm64/boot/dts/qcom/glymur.dtsi | 10 +
drivers/powercap/Kconfig | 13 +
drivers/powercap/Makefile | 1 +
drivers/powercap/qcom_spel.c | 776 +++++++++++++++++++++
6 files changed, 854 insertions(+)
---
base-commit: 80dd246accce631c328ea43294e53b2b2dd2aa32
change-id: 20260519-qcom_spel_driver_upstream-11efd8c85e6e
Best regards,
--
Manaf Meethalavalappu Pallikunhi <manaf.pallikunhi@oss.qualcomm.com>
