Message-Id: <20260108-sifive-pd-drivers-v4-0-2a523d7d51a0@sifive.com>
Date: Thu, 08 Jan 2026 00:58:23 -0800
From: Nick Hu <nick.hu@...ive.com>
To: "Rafael J. Wysocki" <rafael@...nel.org>, 
 Daniel Lezcano <daniel.lezcano@...aro.org>, Paul Walmsley <pjw@...nel.org>, 
 Palmer Dabbelt <palmer@...belt.com>, Albert Ou <aou@...s.berkeley.edu>, 
 Alexandre Ghiti <alex@...ti.fr>, Anup Patel <anup@...infault.org>, 
 Samuel Holland <samuel.holland@...ive.com>, Rob Herring <robh@...nel.org>, 
 Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>, Cyan Yang <cyan.yang@...ive.com>, 
 Nick Hu <nick.hu@...ive.com>
Cc: linux-kernel@...r.kernel.org, linux-pm@...r.kernel.org, 
 linux-riscv@...ts.infradead.org, devicetree@...r.kernel.org
Subject: [PATCH v4 0/3] Add SiFive power provider driver

This patchset introduces the SiFive power provider driver, which sets up a
generic power domain (genpd) provider to coordinate with the RISC-V SBI
CPU idle driver.

To enable this coordination, split the power domain initialization out
of the RISC-V SBI CPU idle driver. This allows coordination between
power domain management and CPU idle states on SiFive platforms.

Changes in v4:
- Split the power domain initialization out of the RISC-V SBI CPU idle
  driver in PATCH 1
- Refine the commit messages of PATCH 1 and PATCH 3
- Rename cpuidle-sifive-dmc-pd.c to cpuidle-sifive-dmc-domain.c
- Rename SIFIVE_DMC_PD_CPUIDLE to CONFIG_SIFIVE_DMC_CPUIDLE_DOMAIN

Changes in v3:
- Update the explanation for the absence of the SoC-specific compatible
  string.
- Drop the smc3/tmc3/cmc3 bindings.
- Separate the genpd init and the idle driver init. The genpd remains
  functional even when the idle state is absent.
- Address the warning from the kernel test robot

Changes in v2:
- Add the driver for SiFive TMC, CMC and SMC
- Drop the `sifive,feature-level` property

Nick Hu (3):
  dt-bindings: power: Add SiFive Domain Management controllers
  cpuidle: riscv-sbi: Work with the external pmdomain driver
  cpuidle: Add SiFive power provider

 .../devicetree/bindings/power/sifive,tmc.yaml |  58 ++++++++++
 drivers/cpuidle/Kconfig.riscv                 |  11 ++
 drivers/cpuidle/Makefile                      |   1 +
 drivers/cpuidle/cpuidle-riscv-sbi.c           |  46 ++++----
 drivers/cpuidle/cpuidle-riscv-sbi.h           |  20 ++++
 drivers/cpuidle/cpuidle-sifive-dmc-pd.c       | 102 ++++++++++++++++++
 6 files changed, 220 insertions(+), 18 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/power/sifive,tmc.yaml
 create mode 100644 drivers/cpuidle/cpuidle-riscv-sbi.h
 create mode 100644 drivers/cpuidle/cpuidle-sifive-dmc-pd.c

--
2.17.1

_______________________________________________
linux-riscv mailing list
linux-riscv@...ts.infradead.org
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---
Nick Hu (3):
      cpuidle: riscv-sbi: Split PM domain init out of the cpuidle driver
      dt-bindings: power: Add SiFive Domain Management controllers
      cpuidle: Add SiFive power provider driver

 .../devicetree/bindings/power/sifive,tmc.yaml      |  58 +++++++
 MAINTAINERS                                        |   2 +
 drivers/cpuidle/Kconfig.riscv                      |  25 ++-
 drivers/cpuidle/Makefile                           |   2 +
 drivers/cpuidle/cpuidle-riscv-sbi-domain.c         | 176 ++++++++++++++++++++
 drivers/cpuidle/cpuidle-riscv-sbi.c                | 178 ++-------------------
 drivers/cpuidle/cpuidle-riscv-sbi.h                |  29 ++++
 drivers/cpuidle/cpuidle-sifive-dmc-domain.c        | 124 ++++++++++++++
 8 files changed, 423 insertions(+), 171 deletions(-)
---
base-commit: f0b9d8eb98dfee8d00419aa07543bdc2c1a44fb1
change-id: 20251207-sifive-pd-drivers-66de65108b1c

Best regards,
-- 
Nick Hu <nick.hu@...ive.com>

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