linux-kernel - [PATCH v2 0/8] pinctrl: Add T-Head TH1520 SoC pin controllers

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Message-Id: <20240914-th1520-pinctrl-v2-0-3ba67dde882c@tenstorrent.com>
Date: Sat, 14 Sep 2024 19:40:48 -0700
From: Drew Fustini <dfustini@...storrent.com>
To: Drew Fustini <drew@...7.com>, Guo Ren <guoren@...nel.org>, 
 Fu Wei <wefu@...hat.com>, Linus Walleij <linus.walleij@...aro.org>, 
 Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>, 
 Emil Renner Berthing <emil.renner.berthing@...onical.com>, 
 Thomas Bonnefille <thomas.bonnefille@...tlin.com>, 
 Paul Walmsley <paul.walmsley@...ive.com>, 
 Palmer Dabbelt <palmer@...belt.com>, Albert Ou <aou@...s.berkeley.edu>
Cc: linux-riscv@...ts.infradead.org, linux-gpio@...r.kernel.org, 
 devicetree@...r.kernel.org, linux-kernel@...r.kernel.org, 
 Drew Fustini <dfustini@...storrent.com>
Subject: [PATCH v2 0/8] pinctrl: Add T-Head TH1520 SoC pin controllers

This adds a pin control driver created by Emil for the T-Head TH1520
RISC-V SoC used on the Lichee Pi 4A and BeagleV Ahead boards and updates
the device trees to make use of it.

Emil's series from January used separate compatibles for each pin
controller instance. Rob did not think this was appropriate because the
programming model is the same for each instance.

This series takes a different approach by adding a thead,pad-group
device tree property to select the pad group for a given pin controller
instance.

Changes in v2:
 - Add thead,pad-group device tree property
 - Change driver to use the thead,pad-group property instead of the unit
   address to identify the pad group of the pin controller being probed
 - Return -EINVAL if no pin group can be determined during probe. In v1,
   there was a bug that instead returned an unitialized variable
 - Link to v1: https://lore.kernel.org/r/20240902-th1520-pinctrl-v1-0-639bf83ef50a@tenstorrent.com

Signed-off-by: Drew Fustini <dfustini@...storrent.com>
---
Emil Renner Berthing (8):
      dt-bindings: pinctrl: Add thead,th1520-pinctrl bindings
      pinctrl: Add driver for the T-Head TH1520 SoC
      riscv: dts: thead: Add TH1520 pin control nodes
      riscv: dts: thead: Add TH1520 GPIO ranges
      riscv: dts: thead: Adjust TH1520 GPIO labels
      riscv: dts: thead: Add Lichee Pi 4M GPIO line names
      riscv: dts: thead: Add TH1520 pinctrl settings for UART0
      riscv: dtb: thead: Add BeagleV Ahead LEDs

 .../bindings/pinctrl/thead,th1520-pinctrl.yaml     | 176 ++++
 MAINTAINERS                                        |   2 +
 arch/riscv/boot/dts/thead/th1520-beaglev-ahead.dts |  87 ++
 .../boot/dts/thead/th1520-lichee-module-4a.dtsi    |  43 +
 arch/riscv/boot/dts/thead/th1520-lichee-pi-4a.dts  |  28 +
 arch/riscv/boot/dts/thead/th1520.dtsi              |  65 +-
 drivers/pinctrl/Kconfig                            |  13 +
 drivers/pinctrl/Makefile                           |   1 +
 drivers/pinctrl/pinctrl-th1520.c                   | 911 +++++++++++++++++++++
 9 files changed, 1310 insertions(+), 16 deletions(-)
---
base-commit: 5be63fc19fcaa4c236b307420483578a56986a37
change-id: 20240902-th1520-pinctrl-d71de44acc66

Best regards,
-- 
Drew Fustini <dfustini@...storrent.com>