linux-kernel - [PATCH v3 0/6] Add support for Amlogic S7/S7D/S6 pinctrl

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Message-Id: <20250527-s6-s7-pinctrl-v3-0-44f6a0451519@amlogic.com>
Date: Tue, 27 May 2025 13:23:27 +0800
From: Xianwei Zhao via B4 Relay <devnull+xianwei.zhao.amlogic.com@...nel.org>
To: Linus Walleij <linus.walleij@...aro.org>, Rob Herring <robh@...nel.org>, 
 Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>, 
 Neil Armstrong <neil.armstrong@...aro.org>, 
 Kevin Hilman <khilman@...libre.com>, Jerome Brunet <jbrunet@...libre.com>, 
 Martin Blumenstingl <martin.blumenstingl@...glemail.com>
Cc: linux-amlogic@...ts.infradead.org, linux-gpio@...r.kernel.org, 
 devicetree@...r.kernel.org, linux-kernel@...r.kernel.org, 
 linux-arm-kernel@...ts.infradead.org, 
 Xianwei Zhao <xianwei.zhao@...ogic.com>
Subject: [PATCH v3 0/6] Add support for Amlogic S7/S7D/S6 pinctrl

In some Amlogic SoCs, to save register space or due to some
abnormal arrangements, two sets of pins share one mux register.
A group starting from pin0 is the main pin group, which acquires
the register address through DTS and has management permissions,
but the register bit offset is undetermined.
Another GPIO group as a subordinate group. Some pins mux use share
register and bit offset from bit0 . But this group do not have
register management permissions.

In SoC S7 and S7D, GPIOX(16~19) mux share with GPIOCC mux register.

In SoC S6, GPIOX(16~19) mux share with GPIOCC mux register, and GPIOD(6)
mux share with GPIOF mux register.

Add S7/S7D/S6 pinctrl compatible string and device node.

Signed-off-by: Xianwei Zhao <xianwei.zhao@...ogic.com>
---
Changes in v3:
- Squash three submissons of bindings into one.
- Link to v2: https://lore.kernel.org/r/20250521-s6-s7-pinctrl-v2-0-0ce5e3728404@amlogic.com

Changes in v2:
- Add a unit address for pinctrl node.
- Use pointer instead of flexible array to solve the problem tested by kernel test robot.
- Link to v1: https://lore.kernel.org/r/20250514-s6-s7-pinctrl-v1-0-39d368cad250@amlogic.com

---
Xianwei Zhao (6):
      dt-bindings: pinctl: amlogic,pinctrl-a4: Add compatible string for S7/S7D/S6
      pinctrl: meson: a4: remove special data processing
      pinctrl: meson: support amlogic S6/S7/S7D SoC
      dts: arm64: amlogic: add S7 pinctrl node
      dts: arm64: amlogic: add S7D pinctrl node
      dts: arm64: amlogic: add S6 pinctrl node

 .../bindings/pinctrl/amlogic,pinctrl-a4.yaml       |   9 +-
 arch/arm64/boot/dts/amlogic/amlogic-s6.dtsi        |  97 +++++++++++++++++
 arch/arm64/boot/dts/amlogic/amlogic-s7.dtsi        |  81 ++++++++++++++
 arch/arm64/boot/dts/amlogic/amlogic-s7d.dtsi       |  90 ++++++++++++++++
 drivers/pinctrl/meson/pinctrl-amlogic-a4.c         | 118 ++++++++++++++++-----
 5 files changed, 370 insertions(+), 25 deletions(-)
---
base-commit: 176e917e010cb7dcc605f11d2bc33f304292482b
change-id: 20250514-s6-s7-pinctrl-af1ebda88a4e

Best regards,
-- 
Xianwei Zhao <xianwei.zhao@...ogic.com>