linux-kernel - [RFC v4 0/4] StarFive's Pulse Width Modulation driver support

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Message-ID: <20230825081328.204442-1-william.qiu@starfivetech.com>
Date:   Fri, 25 Aug 2023 16:13:24 +0800
From:   William Qiu <william.qiu@...rfivetech.com>
To:     <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <linux-riscv@...ts.infradead.org>, <linux-pwm@...r.kernel.org>
CC:     Emil Renner Berthing <kernel@...il.dk>,
        Rob Herring <robh+dt@...nel.org>,
        Philipp Zabel <p.zabel@...gutronix.de>,
        Thierry Reding <thierry.reding@...il.com>,
        Uwe Kleine-König 
        <u.kleine-koenig@...gutronix.de>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>,
        "Paul Walmsley" <paul.walmsley@...ive.com>,
        Palmer Dabbelt <palmer@...belt.com>,
        Albert Ou <aou@...s.berkeley.edu>,
        Hal Feng <hal.feng@...rfivetech.com>,
        William Qiu <william.qiu@...rfivetech.com>
Subject: [RFC v4 0/4] StarFive's Pulse Width Modulation driver support

Hi,

This patchset adds initial rudimentary support for the StarFive
Pulse Width Modulation controller driver. And this driver will
be used in StarFive's VisionFive 2 board.The first patch add
Documentations for the device and Patch 2 adds device probe for
the module.

Changes v3->v4:
- Rebased to v6.5rc7.
- Sorted the header files in alphabetic order.
- Changed iowrite32() to writel().
- Added a way to turn off.
- Moified polarity inversion implementation.
- Added 7100 support.
- Added dts patches.
- Used the various helpers in linux/math.h.
- Corrected formatting problems.
- Renamed dtbinding  to 'starfive,jh7100-pwm.yaml'.
- Dropped the redundant code.

Changes v2->v3:
- Fixed some formatting issues.

Changes v1->v2:
- Renamed the dt-binding 'pwm-starfive.yaml' to 'starfive,jh7110-pwm.yaml'.
- Dropped the compatible's Items.
- Dropped the unuse defines.
- Modified the code to follow the Linux coding style.
- Changed return value to dev_err_probe.
- Dropped the unnecessary local variable.

The patch series is based on v6.5rc7.

William Qiu (4):
  dt-bindings: pwm: Add StarFive PWM module
  pwm: starfive: Add PWM driver support
  riscv: dts: starfive: jh7110: Add PWM node and pins configuration
  riscv: dts: starfive: jh7100: Add PWM node and pins configuration

 .../bindings/pwm/starfive,jh7100-pwm.yaml     |  55 +++++
 MAINTAINERS                                   |   7 +
 .../boot/dts/starfive/jh7100-common.dtsi      |  24 +++
 arch/riscv/boot/dts/starfive/jh7100.dtsi      |   9 +
 .../jh7110-starfive-visionfive-2.dtsi         |  22 ++
 arch/riscv/boot/dts/starfive/jh7110.dtsi      |   9 +
 drivers/pwm/Kconfig                           |   9 +
 drivers/pwm/Makefile                          |   1 +
 drivers/pwm/pwm-starfive-ptc.c                | 192 ++++++++++++++++++
 9 files changed, 328 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/pwm/starfive,jh7100-pwm.yaml
 create mode 100644 drivers/pwm/pwm-starfive-ptc.c

--
2.34.1