linux-kernel - [PATCH v3 0/2] clock support for Samsung Exynos pin controller (Google Tensor gs101)

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Message-Id: <20240426-samsung-pinctrl-busclock-v3-0-adb8664b8a7e@linaro.org>
Date: Fri, 26 Apr 2024 14:25:13 +0100
From: André Draszik <andre.draszik@...aro.org>
To: Krzysztof Kozlowski <krzk@...nel.org>, 
 Sylwester Nawrocki <s.nawrocki@...sung.com>, 
 Alim Akhtar <alim.akhtar@...sung.com>, 
 Linus Walleij <linus.walleij@...aro.org>, Rob Herring <robh@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>, Tomasz Figa <tomasz.figa@...il.com>, 
 Peter Griffin <peter.griffin@...aro.org>
Cc: Tudor Ambarus <tudor.ambarus@...aro.org>, 
 Will McVicker <willmcvicker@...gle.com>, 
 Sam Protsenko <semen.protsenko@...aro.org>, kernel-team@...roid.com, 
 linux-arm-kernel@...ts.infradead.org, linux-samsung-soc@...r.kernel.org, 
 linux-gpio@...r.kernel.org, devicetree@...r.kernel.org, 
 linux-kernel@...r.kernel.org, 
 André Draszik <andre.draszik@...aro.org>
Subject: [PATCH v3 0/2] clock support for Samsung Exynos pin controller
 (Google Tensor gs101)

This series enables clock support on the Samsung Exynos pin controller
driver.

This is required on Socs like Google Tensor gs101, which implement
fine-grained clock control / gating, and as such a running bus clock is
required for register access to work.

Signed-off-by: André Draszik <andre.draszik@...aro.org>
---
Changes in v3:
- fix binding for non-gs101 platforms (Krzysztof), sorry I missed that
  initially :-(
- Link to v2: https://lore.kernel.org/r/20240426-samsung-pinctrl-busclock-v2-0-8dfecaabf020@linaro.org

Changes in v2:
- propagate clk_enable() errors in samsung_pinmux_setup(), i.e.
  struct pinmux_ops::set_mux()
- move clk_enable()/disable() outside bank->slock lock, to avoid
  possible deadlocks due to locking inversion (Krzysztof)
- fix some comments (Krzysztof)
- use 'ret' instead of 'i' in samsung_pinctrl_resume() (Krzysztof)
- Link to v1: https://lore.kernel.org/r/20240425-samsung-pinctrl-busclock-v1-0-898a200abe68@linaro.org

---
André Draszik (2):
      dt-bindings: pinctrl: samsung: google,gs101-pinctrl needs a clock
      pinctrl: samsung: support a bus clock

 .../bindings/pinctrl/samsung,pinctrl.yaml          |  21 ++++
 drivers/pinctrl/samsung/pinctrl-exynos.c           | 112 +++++++++++++++++++++
 drivers/pinctrl/samsung/pinctrl-samsung.c          |  95 ++++++++++++++++-
 drivers/pinctrl/samsung/pinctrl-samsung.h          |   2 +
 4 files changed, 227 insertions(+), 3 deletions(-)
---
base-commit: a59668a9397e7245b26e9be85d23f242ff757ae8
change-id: 20240425-samsung-pinctrl-busclock-151c23d76860

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