From: Changhuang Liang <changhuang.liang@starfivetech.com>
To: Guenter Roeck <linux@roeck-us.net>, Rob Herring <robh@kernel.org>,
Krzysztof Kozlowski <krzk+dt@kernel.org>,
Conor Dooley <conor+dt@kernel.org>
Cc: linux-kernel@vger.kernel.org, linux-hwmon@vger.kernel.org,
devicetree@vger.kernel.org,
Changhuang Liang <changhuang.liang@starfivetech.com>
Subject: [PATCH v5 0/2] Add JHB100 Fan-Tach support
Date: Wed, 23 Sep 2026 06:06:22 -0700 [thread overview]
Message-ID: <20260923130624.239499-1-changhuang.liang@starfivetech.com> (raw)
StarFive Fan-Tach controller can support up to 16 fan tach input.
The series has been tested on the EVB1 board.
Change since v4:
PATCH 1:
- Convert the fan node from fan@0 to fan-0.
- Add the phandle of the PWM node.
- Remove the reg property under the fan node.
- Remove the properties "#address-cells" and "#size-cells".
- Convert the keyword "fan tach" to "pwm fan"
PATCH 2:
- Add PWM fan speed control through up to 8 PWM channels supplied by an external
PWM controller, exposed as pwm[1-8].
- Add support for one PWM channel driving up to two fans.
- Add suspend/resume support to disable and restore PWM outputs across system sleep.
- Add pwm_lock to serialize PWM updates with PM operations.
- Convert the keyword "fan tach" to "pwm fan"
v4: https://lore.kernel.org/all/20260830011941.40199-1-changhuang.liang@starfivetech.com/
v3: https://lore.kernel.org/all/20260824030234.9321-1-changhuang.liang@starfivetech.com/
v2: https://lore.kernel.org/all/20260819091601.41077-1-changhuang.liang@starfivetech.com/
v1: https://lore.kernel.org/all/20260428082337.743546-1-changhuang.liang@starfivetech.com/
Changhuang Liang (2):
dt-bindings: hwmon: Add starfive,jhb100-pwm-fan
hwmon: (starfive-pwm-fan) Add PWM fan driver for StarFive JHB100
.../hwmon/starfive,jhb100-pwm-fan.yaml | 87 ++
Documentation/hwmon/index.rst | 1 +
Documentation/hwmon/starfive-pwm-fan.rst | 45 ++
MAINTAINERS | 8 +
drivers/hwmon/Kconfig | 15 +
drivers/hwmon/Makefile | 1 +
drivers/hwmon/starfive-pwm-fan.c | 762 ++++++++++++++++++
7 files changed, 919 insertions(+)
create mode 100644 Documentation/devicetree/bindings/hwmon/starfive,jhb100-pwm-fan.yaml
create mode 100644 Documentation/hwmon/starfive-pwm-fan.rst
create mode 100644 drivers/hwmon/starfive-pwm-fan.c
--
2.25.1
next reply other threads:[~2026-09-23 13:08 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-09-23 13:06 Changhuang Liang [this message]
2026-09-23 13:06 ` [PATCH v5 1/2] dt-bindings: hwmon: Add starfive,jhb100-pwm-fan Changhuang Liang
2026-09-23 16:37 ` Conor Dooley
2026-09-23 13:06 ` [PATCH v5 2/2] hwmon: (starfive-pwm-fan) Add PWM fan driver for StarFive JHB100 Changhuang Liang
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