MAINTAINERS | 5 +- drivers/tty/serdev/Kconfig | 7 + rust/bindings/bindings_helper.h | 1 + rust/helpers/helpers.c | 1 + rust/helpers/serdev.c | 22 ++ rust/kernel/lib.rs | 2 + rust/kernel/serdev.rs | 605 +++++++++++++++++++++++++++++++++++++ samples/rust/Kconfig | 11 + samples/rust/Makefile | 1 + samples/rust/rust_driver_serdev.rs | 90 ++++++ 10 files changed, 744 insertions(+), 1 deletion(-)
This patch series adds the serdev device bus rust abstraction into the
kernel.
This abstraction will be used by a driver,
which targets the MCU devices in Synology devices.
Kari Argillander also messaged me, stating that he wants to write a
watchdog driver with this abstraction (needing initial device data).
This series depends on [1].
[1] https://lore.kernel.org/rust-for-linux/20260530132736.3298549-1-dakr@kernel.org/
Signed-off-by: Markus Probst <markus.probst@posteo.de>
---
Changes in v16:
- use `Jiffies` instead of `impl Into<Jiffies>`, until `Jiffies` is a
newtype
- Link to v15: https://patch.msgid.link/20260718-rust_serdev-v15-0-208ed2e6ec15@posteo.de
Changes in v15:
- fix documentation typo
- add documentation for `PrivateData::active`
- adding missing `#[inline]` attributes
- replace `serdev::Timeout` with the use of `impl Into<Jiffies>`
- This replaces https://lore.kernel.org/rust-for-linux/20260718-rust_serdev_fixes-v1-0-35433b6dce0f@posteo.de/
- Link to v14: https://patch.msgid.link/20260715-rust_serdev-v14-0-b4ed5c93606f@posteo.de
Changes in v14:
- fix issues reported by Sashiko:
- fix missing Sync
- fix write buffers allowed with data.len() > i32::MAX
- fix sample driver possibly stalling on full tx buffer
- Link to v13: https://patch.msgid.link/20260712-rust_serdev-v13-0-2c4060bc8e30@posteo.de
Changes in v13:
- Added Acked-by trailer from Rob. Consider this a RESEND.
- Link to v12: https://patch.msgid.link/20260603-rust_serdev-v12-0-3400ffb88b12@posteo.de
Changes in v12:
- fix CoreInternal instead of BoundInternal
- Link to v11: https://patch.msgid.link/20260531-rust_serdev-v11-0-dee8e0d830f1@posteo.de
Changes in v11:
- redo changes from v9 with the following fixes:
- fix memory leak on probe failure
- fix possible access of dropped drvdata from receive_buf
- Link to v10: https://patch.msgid.link/20260530-rust_serdev-v10-0-65d1d5db876c@posteo.de
Changes in v10:
- revert everything from v9, except BoundInternal
- use mutex to ensure receive_buf won't be called on a dropped drvdata.
- Link to v9: https://patch.msgid.link/20260530-rust_serdev-v9-0-f8b5fccb49c3@posteo.de
Changes in v9:
- make use of BoundInternal
- use PrivateData wrapper and drop rust_private_data field
- use non-devm version of serdev_device_open
- Link to v8: https://patch.msgid.link/20260530-rust_serdev-v8-0-2a95f1da22a7@posteo.de
Changes in v8:
- adapted to driver-lifetime v5 patch series
- add MAINTAINERS file patch
- Link to v7: https://patch.msgid.link/20260429-rust_serdev-v7-0-0d89c791b5c8@posteo.de
Changes in v7:
- adapted to driver-lifetime patch series
- Link to v6: https://patch.msgid.link/20260427-rust_serdev-v6-0-173798d5e1a3@posteo.de
Changes in v6:
- rebased onto v7.1-rc1
- Link to v5: https://patch.msgid.link/20260420-rust_serdev-v5-0-57e8ba0519f3@posteo.de
Changes in v5:
- fix typo in documentation
- Link to v4: https://lore.kernel.org/r/20260411-rust_serdev-v4-0-845e960c6627@posteo.de
Changes in v4:
- fixed not selecting rust serdev abstraction in sample
- Link to v3: https://lore.kernel.org/r/20260313-rust_serdev-v3-0-c9a3af214f7f@posteo.de
Changes in v3:
- fix vertical import style
- add Kconfig entry for the rust abstraction
- fix documentation in include/linux/serdev.h
- rename private_data to rust_private_data
- fix `complete_all` <-> `wait_for_completion` typo
- move drvdata_borrow call after the completion
- Link to v2: https://lore.kernel.org/r/20260306-rust_serdev-v2-0-e9b23b42b255@posteo.de
Changes in v2:
- fix documentation in `serdev::Driver::write` and
`serdev::Driver::write_all`
- remove use of `dev_info` in probe from the sample
- remove `properties_parse` from the sample
- add optional `baudrate` property to the sample
- remove 1. patch
- remove `TryFrom<&device::Device<Ctx>> for &serdev::Device<Ctx>`
implementation
- fix import style
- add patch to return reference in `devres::register` to fix safety
issue
- add patch to add private data to serdev_device, to fix
`Device.drvdata()` from failing
- simplify abstraction by removing ability to receive the initial
transmission. It may be added later in a separate patch series if
needed.
- Link to v1: https://lore.kernel.org/r/20251220-rust_serdev-v1-0-e44645767621@posteo.de
---
Markus Probst (3):
rust: add basic serial device bus abstractions
samples: rust: add Rust serial device bus sample device driver
MAINTAINERS: serdev: Add self for serdev
MAINTAINERS | 5 +-
drivers/tty/serdev/Kconfig | 7 +
rust/bindings/bindings_helper.h | 1 +
rust/helpers/helpers.c | 1 +
rust/helpers/serdev.c | 22 ++
rust/kernel/lib.rs | 2 +
rust/kernel/serdev.rs | 605 +++++++++++++++++++++++++++++++++++++
samples/rust/Kconfig | 11 +
samples/rust/Makefile | 1 +
samples/rust/rust_driver_serdev.rs | 90 ++++++
10 files changed, 744 insertions(+), 1 deletion(-)
---
base-commit: 4e63c0582e2aef7284a2cc7c62215f245003e775
change-id: 20251217-rust_serdev-ee5481e9085c
On Sat, 18 Jul 2026 15:33:09 +0000, Markus Probst wrote:
> [PATCH v16 0/3] rust: add basic serial device bus abstractions
Applied, thanks!
Branch: driver-core-testing
Tree: git://git.kernel.org/pub/scm/linux/kernel/git/driver-core/driver-core.git
[1/3] rust: add basic serial device bus abstractions
commit: 99f59aa82341
[2/3] samples: rust: add Rust serial device bus sample device driver
commit: 4b2c9156d312
[3/3] MAINTAINERS: serdev: Add self for serdev
commit: 6b71fef6f05c
The patches will appear in the next linux-next integration (typically within 24
hours on weekdays).
The patches are in the driver-core-testing branch and will be promoted to
driver-core-next after validation.
On Thu Jul 23, 2026 at 10:59 PM CEST, Danilo Krummrich wrote: > On Sat, 18 Jul 2026 15:33:09 +0000, Markus Probst wrote: >> [PATCH v16 0/3] rust: add basic serial device bus abstractions > > Applied, thanks! > > Branch: driver-core-testing > Tree: git://git.kernel.org/pub/scm/linux/kernel/git/driver-core/driver-core.git > > [1/3] rust: add basic serial device bus abstractions > commit: 99f59aa82341 > [2/3] samples: rust: add Rust serial device bus sample device driver > commit: 4b2c9156d312 > [3/3] MAINTAINERS: serdev: Add self for serdev > commit: 6b71fef6f05c > > The patches will appear in the next linux-next integration (typically within 24 > hours on weekdays). > > The patches are in the driver-core-testing branch and will be promoted to > driver-core-next after validation. Greg, since I've dropped it from the queue a few days ago I've now picked it back up. Thanks, Danilo
On Thu, Jul 23, 2026 at 11:01:17PM +0200, Danilo Krummrich wrote: > On Thu Jul 23, 2026 at 10:59 PM CEST, Danilo Krummrich wrote: > > On Sat, 18 Jul 2026 15:33:09 +0000, Markus Probst wrote: > >> [PATCH v16 0/3] rust: add basic serial device bus abstractions > > > > Applied, thanks! > > > > Branch: driver-core-testing > > Tree: git://git.kernel.org/pub/scm/linux/kernel/git/driver-core/driver-core.git > > > > [1/3] rust: add basic serial device bus abstractions > > commit: 99f59aa82341 > > [2/3] samples: rust: add Rust serial device bus sample device driver > > commit: 4b2c9156d312 > > [3/3] MAINTAINERS: serdev: Add self for serdev > > commit: 6b71fef6f05c > > > > The patches will appear in the next linux-next integration (typically within 24 > > hours on weekdays). > > > > The patches are in the driver-core-testing branch and will be promoted to > > driver-core-next after validation. > > Greg, since I've dropped it from the queue a few days ago I've now picked it > back up. That's great, thanks!
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