linux-kernel - [PATCH v5 00/10] pmdomain: samsung: add support for Google GS101

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Message-Id: <20260205-gs101-pd-v5-0-ede49cdb57a6@linaro.org>
Date: Thu, 05 Feb 2026 21:42:28 +0000
From: André Draszik <andre.draszik@...aro.org>
To: Krzysztof Kozlowski <krzk@...nel.org>, 
 Alim Akhtar <alim.akhtar@...sung.com>, Rob Herring <robh@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>, 
 Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Ulf Hansson <ulf.hansson@...aro.org>, Liam Girdwood <lgirdwood@...il.com>, 
 Mark Brown <broonie@...nel.org>
Cc: Peter Griffin <peter.griffin@...aro.org>, 
 Tudor Ambarus <tudor.ambarus@...aro.org>, Juan Yescas <jyescas@...gle.com>, 
 Will McVicker <willmcvicker@...gle.com>, kernel-team@...roid.com, 
 linux-arm-kernel@...ts.infradead.org, linux-samsung-soc@...r.kernel.org, 
 devicetree@...r.kernel.org, linux-kernel@...r.kernel.org, 
 linux-pm@...r.kernel.org, 
 André Draszik <andre.draszik@...aro.org>, 
 Marek Szyprowski <m.szyprowski@...sung.com>, 
 Krzysztof Kozlowski <krzk@...nel.org>
Subject: [PATCH v5 00/10] pmdomain: samsung: add support for Google GS101

Hi,

This series adds support for the power domains on Google GS101.

There are a few differences compared to SoCs already supported by this
driver:
* register access does not work via plain ioremap() / readl() /
  writel().
  Instead, the regmap created by the PMU driver must be used (which
  uses Arm SMCC calls under the hood).
* DTZPC: a call needs to be made before and after power domain off/on,
  to inform the EL3 firmware of the request.
* power domains can and are fed by a regulator rail and therefore
  regulator control needed be implemented.

Bullet points 2 and 3 are new since version 4 of this series, and
related changes are in patches 1, 2, 9, and 10. I can merge patch 9
(SMC call) into the gs101 patch (patch 7) if preferred, but for now I
kept them independent to make it easier to see changes compared to
previous versions of this series, and because patch 9 actually applies
to not only gs101, but to many newer Exynos SoCs, and to make patches 9
and 10 themselves easier to review and reason about.

The DT update to add the new required properties on gs101 will be
posted separately.

Signed-off-by: André Draszik <andre.draszik@...aro.org>
---
Changes in v5:
- add domain-supply to binding (patch 2)
- Link to v4: https://lore.kernel.org/r/20260128-gs101-pd-v4-0-cbe7bd5a4060@linaro.org

Changes in v4:
- drop unneeded or already merged patches
- drop patch "pmdomain: samsung: convert to regmap_read_poll_timeout()"
  as Marek reported issues on some platforms
- rebase
- DTZPC related changes
- Link to v3: https://lore.kernel.org/r/20251016-gs101-pd-v3-0-7b30797396e7@linaro.org

Changes in v3:
- use additionalProperties, not unevaluatedProperties in patch 2
- fix path in $id in patch 2 (Rob)
- drop comment around 'select' in patch 2 (Rob)
- collect tags
- Link to v2: https://lore.kernel.org/r/20251009-gs101-pd-v2-0-3f4a6db2af39@linaro.org

Changes in v2:
- Krzysztof:
  - move google,gs101-pmu binding into separate file
  - mark devm_kstrdup_const() patch as fix
  - use bool for need_early_sync_state
  - merge patches 8 and 10 from v1 series into one patch
- collect tags
- Link to v1: https://lore.kernel.org/r/20251006-gs101-pd-v1-0-f0cb0c01ea7b@linaro.org

---
André Draszik (10):
      dt-bindings: soc: google: add google,gs101-dtzpc
      dt-bindings: power: samsung: add google,gs101-pd
      dt-bindings: soc: samsung: exynos-pmu: move gs101-pmu into separate binding
      dt-bindings: soc: google: gs101-pmu: allow power domains as children
      pmdomain: samsung: convert to using regmap
      pmdomain: samsung: don't hard-code offset for registers to 0 and 4
      pmdomain: samsung: add support for google,gs101-pd
      pmdomain: samsung: use dev_err() instead of pr_err()
      pmdomain: samsung: implement SMC to save / restore TZ config
      pmdomain: samsung: implement domain-supply regulator

 .../devicetree/bindings/power/pd-samsung.yaml      |  33 ++-
 .../bindings/soc/google/google,gs101-dtzpc.yaml    |  42 ++++
 .../bindings/soc/google/google,gs101-pmu.yaml      |  97 ++++++++
 .../bindings/soc/samsung/exynos-pmu.yaml           |  20 --
 MAINTAINERS                                        |   2 +
 drivers/pmdomain/samsung/exynos-pm-domains.c       | 254 ++++++++++++++++++---
 6 files changed, 399 insertions(+), 49 deletions(-)
---
base-commit: 9845cf73f7db6094c0d8419d6adb848028f4a921
change-id: 20251001-gs101-pd-d4dc97d70a84

Best regards,
-- 
André Draszik <andre.draszik@...aro.org>