linux-kernel - [RFC v2 0/5] Microchip mpfs/pic64gx pinctrl part 2

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Message-ID: <20251127-bogged-gauze-74aed9fdac0e@spud>
Date: Thu, 27 Nov 2025 10:57:56 +0000
From: Conor Dooley <conor@...nel.org>
To: linus.walleij@...aro.org
Cc: conor@...nel.org,
	Conor Dooley <conor.dooley@...rochip.com>,
	Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	linux-kernel@...r.kernel.org,
	linux-gpio@...r.kernel.org,
	devicetree@...r.kernel.org,
	Valentina.FernandezAlanis@...rochip.com
Subject: [RFC v2 0/5] Microchip mpfs/pic64gx pinctrl part 2

From: Conor Dooley <conor.dooley@...rochip.com>

Hey Linus,

v2 here, with what I need out of a generic function. I think I've done
what you wanted location wise, but my naming failed me again with the
Kconfig knob for it.

Still RFC, so ignore the lack of a meaningful commit message on it.

I didn't touch the mutual exclusion stuff yet, that's next and why I
left RFC on it in addition to ibufmd still being unexplained.

There's one @Linus in the driver worth checking out, cos it's the impact
of using a generic function to do function + group creation. Don't think
it's a big deal, but worth confirming that it's fine.

Mainly looking for feedback on the new generic function here.

Cheers,
Conor.

main changes in v2:
- bank voltage is now controllable from dt
- bank lockdown no longer controllable from dt
- dt_node_to_map callback is now a new (attempt at) a generic function
- some schmitt properties now no longer supported

CC: Linus Walleij <linus.walleij@...aro.org>
CC: Rob Herring <robh@...nel.org>
CC: Krzysztof Kozlowski <krzk+dt@...nel.org>
CC: linux-kernel@...r.kernel.org
CC: linux-gpio@...r.kernel.org
CC: devicetree@...r.kernel.org
CC: Valentina.FernandezAlanis@...rochip.com

Conor Dooley (5):
  dt-bindings: pinctrl: document polarfire soc mssio pin controller
  pinctrl: add generic functions + pins mapper
  pinctrl: add polarfire soc mssio pinctrl driver
  MAINTAINERS: add Microchip mpfs mssio driver/bindings to entry
  riscv: dts: microchip: add pinctrl nodes for mpfs/icicle kit

 .../pinctrl/microchip,mpfs-pinctrl-mssio.yaml | 119 +++
 .../microchip,mpfs-mss-top-sysreg.yaml        |   4 +
 MAINTAINERS                                   |   2 +
 .../dts/microchip/mpfs-icicle-kit-common.dtsi |   1 -
 .../dts/microchip/mpfs-icicle-kit-fabric.dtsi |  63 ++
 .../boot/dts/microchip/mpfs-pinctrl.dtsi      | 167 ++++
 arch/riscv/boot/dts/microchip/mpfs.dtsi       |  16 +
 drivers/pinctrl/Kconfig                       |  13 +-
 drivers/pinctrl/Makefile                      |   2 +
 drivers/pinctrl/pinconf.h                     |   7 +
 drivers/pinctrl/pinctrl-generic.c             | 186 +++++
 drivers/pinctrl/pinctrl-mpfs-mssio.c          | 750 ++++++++++++++++++
 12 files changed, 1327 insertions(+), 3 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/pinctrl/microchip,mpfs-pinctrl-mssio.yaml
 create mode 100644 arch/riscv/boot/dts/microchip/mpfs-pinctrl.dtsi
 create mode 100644 drivers/pinctrl/pinctrl-generic.c
 create mode 100644 drivers/pinctrl/pinctrl-mpfs-mssio.c

-- 
2.51.0