linux-kernel - [PATCH v3 00/10] pinctrl: stm32: Support I/O synchronization

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Message-ID: <20251014140451.1009969-1-antonio.borneo@foss.st.com>
Date: Tue, 14 Oct 2025 16:04:41 +0200
From: Antonio Borneo <antonio.borneo@...s.st.com>
To: Linus Walleij <linus.walleij@...aro.org>, Rob Herring <robh@...nel.org>,
        Krzysztof Kozlowski <krzk+dt@...nel.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Maxime Coquelin <mcoquelin.stm32@...il.com>,
        Alexandre Torgue
	<alexandre.torgue@...s.st.com>,
        Bartosz Golaszewski <brgl@...ev.pl>, <linux-gpio@...r.kernel.org>,
        <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <linux-stm32@...md-mailman.stormreply.com>,
        <linux-arm-kernel@...ts.infradead.org>
CC: Antonio Borneo <antonio.borneo@...s.st.com>,
        Christophe Roullier
	<christophe.roullier@...s.st.com>,
        Fabien Dessenne
	<fabien.dessenne@...s.st.com>,
        Valentin Caron <valentin.caron@...s.st.com>
Subject: [PATCH v3 00/10] pinctrl: stm32: Support I/O synchronization

This v3 is a subset of the v1, split-out to simplify the review.
The old patches concerned in v1 where 05/14, 06/14 and 07/14.

This subset:
- introduces the generic pinctrl properties "skew-delay-input" and
  "skew-delay-output", as suggested by Linus Walleij;
- applies some cleanup to STM32 pinctrl driver to simplify the following
  commits in the series;
- adds support for the I/O synchronization in STM32 pinctrl driver and
  bindings;
- updates the DT for STM32MP25 pinctrl to use the new properties.

Changes v2 -> v3:
- rebased on v6.18-rc1;
- replace "skew-delay-direction" with "skew-delay-input" and
  "skew-delay-output";
- use generic properties from pincfg-node.yaml in dt-bindings;
- add the new properties to the new node eth1 in DT.

Changes v1 -> v2 subset:
- rebased on v6.17-rc1;
- replace ST property "st,io-delay" with generic "skew-delay";
- replace ST property "st,io-delay-path" with generic "skew-delay-direction";
- collapse the other ST property in a single "st,io-sync";
- Link to v1: https://lore.kernel.org/lkml/20241022155658.1647350-1-antonio.borneo@foss.st.com/



Antonio Borneo (10):
  pinctrl: pinconf-generic: Add properties 'skew-delay-{in,out}put'
  dt-bindings: pincfg-node: Add properties 'skew-delay-{in,out}put'
  pinctrl: stm32: Rework stm32_pconf_parse_conf()
  pinctrl: stm32: Simplify handling of backup pin status
  pinctrl: stm32: Drop useless spinlock save and restore
  pinctrl: stm32: Avoid keeping a bool value in a u32 variable
  pinctrl: stm32: Support I/O synchronization parameters
  dt-bindings: pinctrl: stm32: Use properties from pincfg-node.yaml
  dt-bindings: pinctrl: stm32: Support I/O synchronization parameters
  arm64: dts: st: Add I/O sync to eth pinctrl in stm32mp25-pinctrl.dtsi

 .../bindings/pinctrl/pincfg-node.yaml         |  22 ++
 .../bindings/pinctrl/st,stm32-pinctrl.yaml    | 123 ++++++-
 arch/arm64/boot/dts/st/stm32mp25-pinctrl.dtsi |   4 +
 drivers/pinctrl/pinconf-generic.c             |   4 +
 drivers/pinctrl/stm32/pinctrl-stm32.c         | 345 ++++++++++++++----
 drivers/pinctrl/stm32/pinctrl-stm32.h         |   1 +
 drivers/pinctrl/stm32/pinctrl-stm32mp257.c    |   2 +
 include/linux/pinctrl/pinconf-generic.h       |  12 +
 8 files changed, 421 insertions(+), 92 deletions(-)


base-commit: 3a8660878839faadb4f1a6dd72c3179c1df56787
-- 
2.34.1