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Fri, 6 Mar 2026 20:38:27 +0100 (CET) From: Markus Probst Date: Fri, 06 Mar 2026 19:38:28 +0000 Subject: [PATCH 1/2] dt-bindings: mfd: Add binding for synology,microp devices Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20260306-synology_microp_initial-v1-1-fcffede6448c@posteo.de> References: <20260306-synology_microp_initial-v1-0-fcffede6448c@posteo.de> In-Reply-To: <20260306-synology_microp_initial-v1-0-fcffede6448c@posteo.de> To: Lee Jones , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Greg Kroah-Hartman , Miguel Ojeda , Boqun Feng , Gary Guo , =?utf-8?q?Bj=C3=B6rn_Roy_Baron?= , Benno Lossin , Andreas Hindborg , Alice Ryhl , Trevor Gross , Danilo Krummrich Cc: devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-staging@lists.linux.dev, rust-for-linux@vger.kernel.org, Markus Probst X-Developer-Signature: v=1; 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preference=encrypt Add the Synology Microp devicetree bindings. Those devices are microcontrollers found on Synology NAS devices. They are connected to a serial port on the host device. Those devices are used to control certain LEDs, fan speeds, a beeper, to handle buttons, fan failures and to properly shutdown and reboot the device. Signed-off-by: Markus Probst --- .../devicetree/bindings/mfd/synology,microp.yaml | 75 ++++++++++++++++++= ++++ 1 file changed, 75 insertions(+) diff --git a/Documentation/devicetree/bindings/mfd/synology,microp.yaml b/D= ocumentation/devicetree/bindings/mfd/synology,microp.yaml new file mode 100644 index 000000000000..0fcb0b750bf0 --- /dev/null +++ b/Documentation/devicetree/bindings/mfd/synology,microp.yaml @@ -0,0 +1,75 @@ +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/mfd/synology,microp.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Synology NAS on-board Microcontroller + +maintainers: + - Markus Probst + +description: | + Synology devices contain a microcontroller on their device to control + certain leds, fan speeds, a beeper, to properly handle system shutdown + and reboot, buttons and fan failures. + +properties: + compatible: + enum: + - synology,microp + power-led: + $ref: /schemas/leds/common.yaml + unevaluatedProperties: false + status-led: + $ref: /schemas/leds/common.yaml + unevaluatedProperties: false + alert-led: + $ref: /schemas/leds/common.yaml + unevaluatedProperties: false + usb-led: + $ref: /schemas/leds/common.yaml + unevaluatedProperties: false + no-check-fan: + type: boolean + description: | + Disable fan failure check. + + The fan failure event is triggered on the device, even if the fan + has been intentionally set to a low speed. 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This property prevents + a hardware protection shutdown if a cpu fan failure event is + reported. + +required: + - compatible + - power-led + - status-led + +additionalProperties: false + +examples: + - | + #include + + uart { + microp { + compatible =3D "synology,microp"; + + power-led { + color =3D ; + function =3D LED_FUNCTION_POWER; + }; + + status-led { + color =3D ; + function =3D LED_FUNCTION_STATUS; + }; + }; + }; --=20 2.52.0 From nobody Thu Apr 9 16:36:11 2026 Received: from mout02.posteo.de (mout02.posteo.de [185.67.36.66]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 39A7F4279F6 for ; Fri, 6 Mar 2026 19:38:33 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=185.67.36.66 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1772825923; cv=none; b=h5trJgwxIJE8GtciWxcDGV6gntOJdukzUGN9Pl31UvZQu6i8jZn/TZZVfVVxLFFLua4YOn8UalNQ0hWGQCXGYv5e2d7aqrEv8XmRYWaBSlpXTEvNfcIcqV2nnB4BLmxBDwILemDnFeW37iXa+O4Fy8RUDnlxTd4Hh6uaqWzBelQ= ARC-Message-Signature: i=1; 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preference=encrypt Add a initial synology microp driver, written in Rust, to the staging tree. The driver targets a microcontroller found in Synology NAS devices. It currently only supports controlling of the power led, status led, alert led and usb led. Other components such as fan control or handling on-device buttons will be added once the required rust abstractions are there. --- MAINTAINERS | 6 + drivers/staging/Kconfig | 2 + drivers/staging/Makefile | 1 + drivers/staging/synology_microp/Kconfig | 4 + drivers/staging/synology_microp/Makefile | 2 + drivers/staging/synology_microp/TODO | 8 + drivers/staging/synology_microp/command.rs | 48 +++++ drivers/staging/synology_microp/led.rs | 229 +++++++++++++++++= ++++ drivers/staging/synology_microp/synology_microp.rs | 73 +++++++ rust/uapi/uapi_helper.h | 2 + 10 files changed, 375 insertions(+) diff --git a/MAINTAINERS b/MAINTAINERS index e9e83ab552c7..a1f8dec31db2 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -25143,6 +25143,12 @@ L: linux-fbdev@vger.kernel.org S: Maintained F: drivers/staging/sm750fb/ =20 +STAGING - SYNOLOGY MICROP DRIVER +M: Markus Probst +S: Maintained +F: Documentation/devicetree/bindings/mfd/synology,microp.yaml +F: drivers/staging/synology_microp/ + STAGING SUBSYSTEM M: Greg Kroah-Hartman L: linux-staging@lists.linux.dev diff --git a/drivers/staging/Kconfig b/drivers/staging/Kconfig index 2f92cd698bef..193d4a5d7f56 100644 --- a/drivers/staging/Kconfig +++ b/drivers/staging/Kconfig @@ -48,4 +48,6 @@ source "drivers/staging/axis-fifo/Kconfig" =20 source "drivers/staging/vme_user/Kconfig" =20 +source "drivers/staging/synology_microp/Kconfig" + endif # STAGING diff --git a/drivers/staging/Makefile b/drivers/staging/Makefile index f5b8876aa536..cb0cadd08ae2 100644 --- a/drivers/staging/Makefile +++ b/drivers/staging/Makefile @@ -13,3 +13,4 @@ obj-$(CONFIG_MOST) +=3D most/ obj-$(CONFIG_GREYBUS) +=3D greybus/ obj-$(CONFIG_BCM2835_VCHIQ) +=3D vc04_services/ obj-$(CONFIG_XIL_AXIS_FIFO) +=3D axis-fifo/ +obj-$(CONFIG_MFD_SYNOLOGY_MICROP) +=3D synology_microp/ diff --git a/drivers/staging/synology_microp/Kconfig b/drivers/staging/syno= logy_microp/Kconfig new file mode 100644 index 000000000000..8d315d2576d8 --- /dev/null +++ b/drivers/staging/synology_microp/Kconfig @@ -0,0 +1,4 @@ + +config MFD_SYNOLOGY_MICROP + tristate "Synology Microp driver" + depends on RUST && SERIAL_DEV_BUS && LEDS_CLASS && LEDS_CLASS_MULTICOLOR diff --git a/drivers/staging/synology_microp/Makefile b/drivers/staging/syn= ology_microp/Makefile new file mode 100644 index 000000000000..d762cada20c9 --- /dev/null +++ b/drivers/staging/synology_microp/Makefile @@ -0,0 +1,2 @@ + +obj-y +=3D synology_microp.o diff --git a/drivers/staging/synology_microp/TODO b/drivers/staging/synolog= y_microp/TODO new file mode 100644 index 000000000000..d432ddd8403c --- /dev/null +++ b/drivers/staging/synology_microp/TODO @@ -0,0 +1,8 @@ +TODO: +- not all devices have a alert or usb led. Only register them, if a fwnode= entry is present. +- add missing components: + - handle on-device buttons (Power, Factory reset, "USB Copy") + - handle fan failure + - beeper + - fan speed control + - correctly perform device power-off and restart on Synology devices diff --git a/drivers/staging/synology_microp/command.rs b/drivers/staging/s= ynology_microp/command.rs new file mode 100644 index 000000000000..e98e46423e2d --- /dev/null +++ b/drivers/staging/synology_microp/command.rs @@ -0,0 +1,48 @@ +use kernel::{ + device::Bound, + error::Result, + serdev, // +}; + +use crate::led; + +#[derive(Copy, Clone)] +#[expect( + clippy::enum_variant_names, + reason =3D "future variants will not end with Led" +)] +pub(crate) enum Command { + PowerLed(led::State), + StatusLed(led::StatusLedColor, led::State), + AlertLed(led::State), + UsbLed(led::State), +} + +impl Command { + pub(crate) fn write(self, dev: &serdev::Device) -> Result<()> { + dev.write_all( + match self { + Command::PowerLed(led::State::On) =3D> &[0x34], + Command::PowerLed(led::State::Blink) =3D> &[0x35], + Command::PowerLed(led::State::Off) =3D> &[0x36], + + Command::StatusLed(_, led::State::Off) =3D> &[0x37], + Command::StatusLed(led::StatusLedColor::Green, led::State:= :On) =3D> &[0x38], + Command::StatusLed(led::StatusLedColor::Green, led::State:= :Blink) =3D> &[0x39], + Command::StatusLed(led::StatusLedColor::Orange, led::State= ::On) =3D> &[0x3A], + Command::StatusLed(led::StatusLedColor::Orange, led::State= ::Blink) =3D> &[0x3B], + + Command::AlertLed(led::State::On) =3D> &[0x4C, 0x41, 0x31], + Command::AlertLed(led::State::Blink) =3D> &[0x4C, 0x41, 0x= 32], + Command::AlertLed(led::State::Off) =3D> &[0x4C, 0x41, 0x33= ], + + Command::UsbLed(led::State::On) =3D> &[0x40], + Command::UsbLed(led::State::Blink) =3D> &[0x41], + Command::UsbLed(led::State::Off) =3D> &[0x42], + }, + serdev::Timeout::Max, + )?; + dev.wait_until_sent(serdev::Timeout::Max); + Ok(()) + } +} diff --git a/drivers/staging/synology_microp/led.rs b/drivers/staging/synol= ogy_microp/led.rs new file mode 100644 index 000000000000..deeece661937 --- /dev/null +++ b/drivers/staging/synology_microp/led.rs @@ -0,0 +1,229 @@ +use core::sync::atomic::{ + AtomicBool, + Ordering, // +}; + +use kernel::{ + device::Bound, + devres::Devres, + error::Error, + led::{self, MultiColorSubLed}, + macros::vtable, + prelude::*, + serdev, // +}; + +use crate::command::Command; + +pub(crate) struct SynologyMicropLedHandler { + blink: AtomicBool, + map: fn(State) -> Command, +} + +pub(crate) struct SynologyMicropStatusLedHandler { + blink: AtomicBool, +} + +#[derive(Copy, Clone)] +pub(crate) enum State { + On, + Blink, + Off, +} + +#[derive(Copy, Clone)] +pub(crate) enum StatusLedColor { + Green, + Orange, +} + +impl SynologyMicropLedHandler { + fn register<'a>( + parent: &'a serdev::Device, + fwnode_child_name: &'static CStr, + default_trigger: &'static CStr, + brightness: u32, + color: led::Color, + map: fn(State) -> Command, + ) -> impl PinInit>, Error> + 'a { + led::DeviceBuilder::new() + .fwnode( + parent + .as_ref() + .fwnode() + .and_then(|fwnode| fwnode.get_child_by_name(fwnode_chi= ld_name)), + ) + .default_trigger(default_trigger) + .initial_brightness(brightness) + .devicename(c"synology-microp") + .color(color) + .build( + parent, + Ok(Self { + blink: AtomicBool::new(true), + map, + }), + ) + } + + pub(crate) fn register_power<'a>( + parent: &'a serdev::Device, + ) -> impl PinInit>, Error> + 'a { + Self::register( + parent, + c"power-led", + c"timer", + 1, + led::Color::Blue, + Command::PowerLed, + ) + } + + pub(crate) fn register_alert<'a>( + parent: &'a serdev::Device, + ) -> impl PinInit>, Error> + 'a { + Self::register( + parent, + c"alert-led", + c"none", + 0, + led::Color::Orange, + Command::AlertLed, + ) + } + + pub(crate) fn register_usb<'a>( + parent: &'a serdev::Device, + ) -> impl PinInit>, Error> + 'a { + Self::register( + parent, + c"usb-led", + c"none", + 0, + led::Color::Green, + Command::UsbLed, + ) + } +} + +#[vtable] +impl led::LedOps for SynologyMicropLedHandler { + type Bus =3D serdev::Device; + type Mode =3D led::Normal; + const BLOCKING: bool =3D true; + const MAX_BRIGHTNESS: u32 =3D 1; + + fn brightness_set( + &self, + dev: &Self::Bus, + _classdev: &led::Device, + brightness: u32, + ) -> Result<()> { + (self.map)(if brightness =3D=3D 0 { + self.blink.store(false, Ordering::Relaxed); + State::Off + } else if self.blink.load(Ordering::Relaxed) { + State::Blink + } else { + State::On + }) + .write(dev) + } + + fn blink_set( + &self, + dev: &Self::Bus, + _classdev: &led::Device, + delay_on: &mut usize, + delay_off: &mut usize, + ) -> Result<()> { + *delay_on =3D 167; + *delay_off =3D 167; + + self.blink.store(true, Ordering::Relaxed); + (self.map)(State::Blink).write(dev) + } +} + +impl SynologyMicropStatusLedHandler { + pub(crate) fn register( + parent: &serdev::Device, + ) -> impl PinInit>, Error> + '_ { + const SUBLEDS: &[MultiColorSubLed] =3D &[ + MultiColorSubLed::new(led::Color::Green).initial_intensity(1), + MultiColorSubLed::new(led::Color::Orange), + ]; + + led::DeviceBuilder::new() + .fwnode( + parent + .as_ref() + .fwnode() + .and_then(|fwnode| fwnode.get_child_by_name(c"status-l= ed")), + ) + .devicename(c"synology-microp") + .color(led::Color::Multi) + .build_multicolor( + parent, + Ok(SynologyMicropStatusLedHandler { + blink: AtomicBool::new(false), + }), + SUBLEDS, + ) + } +} + +#[vtable] +impl led::LedOps for SynologyMicropStatusLedHandler { + type Bus =3D serdev::Device; + type Mode =3D led::MultiColor; + const BLOCKING: bool =3D true; + const MAX_BRIGHTNESS: u32 =3D 1; + + fn brightness_set( + &self, + dev: &Self::Bus, + classdev: &led::MultiColorDevice, + brightness: u32, + ) -> Result<()> { + if brightness =3D=3D 0 { + self.blink.store(false, Ordering::Relaxed); + } + + let (color, subled_brightness) =3D if classdev.subleds()[1].bright= ness =3D=3D 0 { + (StatusLedColor::Green, classdev.subleds()[0].brightness) + } else { + (StatusLedColor::Orange, classdev.subleds()[1].brightness) + }; + + if subled_brightness =3D=3D 0 { + Command::StatusLed(color, State::Off) + } else if self.blink.load(Ordering::Relaxed) { + Command::StatusLed(color, State::Blink) + } else { + Command::StatusLed(color, State::On) + } + .write(dev) + } + + fn blink_set( + &self, + dev: &Self::Bus, + classdev: &led::MultiColorDevice, + delay_on: &mut usize, + delay_off: &mut usize, + ) -> Result<()> { + *delay_on =3D 167; + *delay_off =3D 167; + + self.blink.store(true, Ordering::Relaxed); + + let color =3D if classdev.subleds()[1].brightness =3D=3D 0 { + StatusLedColor::Green + } else { + StatusLedColor::Orange + }; + + Command::StatusLed(color, State::Blink).write(dev) + } +} diff --git a/drivers/staging/synology_microp/synology_microp.rs b/drivers/s= taging/synology_microp/synology_microp.rs new file mode 100644 index 000000000000..abc513edc590 --- /dev/null +++ b/drivers/staging/synology_microp/synology_microp.rs @@ -0,0 +1,73 @@ +// SPDX-License-Identifier: GPL-2.0 + +//! Synology Microp driver + +use kernel::{ + device, + devres::Devres, + of, + prelude::*, + serdev, // +}; +use pin_init::pin_init_scope; + +use crate::{ + led::{ + SynologyMicropLedHandler, + SynologyMicropStatusLedHandler, // + }, // +}; + +pub(crate) mod command; +mod led; + +kernel::module_serdev_device_driver! { + type: SynologyMicropDriver, + name: "synology_microp", + authors: ["Markus Probst "], + description: "Synology Microp driver", + license: "GPL v2", +} + +#[pin_data] +struct SynologyMicropDriver { + #[pin] + power_led: Devres>, + #[pin] + status_led: Devres>, + #[pin] + alert_led: Devres>, + #[pin] + usb_led: Devres>, +} + +kernel::of_device_table!( + OF_TABLE, + MODULE_OF_TABLE, + ::IdInfo, + [(of::DeviceId::new(c"synology,microp"), ()),] +); + +#[vtable] +impl serdev::Driver for SynologyMicropDriver { + type IdInfo =3D (); + const OF_ID_TABLE: Option> =3D Some(= &OF_TABLE); + + fn probe( + dev: &serdev::Device, + _id_info: Option<&Self::IdInfo>, + ) -> impl PinInit { + pin_init_scope(move || { + let _ =3D dev.set_baudrate(9600); + dev.set_flow_control(false); + dev.set_parity(serdev::Parity::None)?; + + Ok(try_pin_init!(Self { + power_led <- SynologyMicropLedHandler::register_power(dev), + status_led <- SynologyMicropStatusLedHandler::register(dev= ), + alert_led <- SynologyMicropLedHandler::register_alert(dev), + usb_led <- SynologyMicropLedHandler::register_usb(dev), + })) + }) + } +} diff --git a/rust/uapi/uapi_helper.h b/rust/uapi/uapi_helper.h index 06d7d1a2e8da..94b6c1b59e56 100644 --- a/rust/uapi/uapi_helper.h +++ b/rust/uapi/uapi_helper.h @@ -14,3 +14,5 @@ #include #include #include +#include + --=20 2.52.0