linux-toradex.git/samples/rust, branch v6.15-rc7

Merge tag 'char-misc-6.15-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc

2025-04-01T18:26:08+00:00

Pull char / misc / IIO driver updates from Greg KH:
 "Here is the big set of char, misc, iio, and other smaller driver
  subsystems for 6.15-rc1. Lots of stuff in here, including:

   - loads of IIO changes and driver updates

   - counter driver updates

   - w1 driver updates

   - faux conversions for some drivers that were abusing the platform
     bus interface

   - coresight driver updates

   - rust miscdevice binding updates based on real-world-use

   - other minor driver updates

  All of these have been in linux-next with no reported issues for quite
  a while"

* tag 'char-misc-6.15-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc: (292 commits)
  samples: rust_misc_device: fix markup in top-level docs
  Coresight: Fix a NULL vs IS_ERR() bug in probe
  misc: lis3lv02d: convert to use faux_device
  tlclk: convert to use faux_device
  regulator: dummy: convert to use the faux device interface
  bus: mhi: host: Fix race between unprepare and queue_buf
  coresight: configfs: Constify struct config_item_type
  doc: iio: ad7380: describe offload support
  iio: ad7380: add support for SPI offload
  iio: light: Add check for array bounds in veml6075_read_int_time_ms
  iio: adc: ti-ads7924 Drop unnecessary function parameters
  staging: iio: ad9834: Use devm_regulator_get_enable()
  staging: iio: ad9832: Use devm_regulator_get_enable()
  iio: gyro: bmg160_spi: add of_match_table
  dt-bindings: iio: adc: Add i.MX94 and i.MX95 support
  iio: adc: ad7768-1: remove unnecessary locking
  Documentation: ABI: add wideband filter type to sysfs-bus-iio
  iio: adc: ad7768-1: set MOSI idle state to prevent accidental reset
  iio: adc: ad7768-1: Fix conversion result sign
  iio: adc: ad7124: Benefit of dev = indio_dev->dev.parent in ad7124_parse_channel_config()
  ...

Merge tag 'driver-core-6.15-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core

2025-04-01T18:02:03+00:00

Pull driver core updatesk from Greg KH:
 "Here is the big set of driver core updates for 6.15-rc1. Lots of stuff
  happened this development cycle, including:

   - kernfs scaling changes to make it even faster thanks to rcu

   - bin_attribute constify work in many subsystems

   - faux bus minor tweaks for the rust bindings

   - rust binding updates for driver core, pci, and platform busses,
     making more functionaliy available to rust drivers. These are all
     due to people actually trying to use the bindings that were in
     6.14.

   - make Rafael and Danilo full co-maintainers of the driver core
     codebase

   - other minor fixes and updates"

* tag 'driver-core-6.15-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core: (52 commits)
  rust: platform: require Send for Driver trait implementers
  rust: pci: require Send for Driver trait implementers
  rust: platform: impl Send + Sync for platform::Device
  rust: pci: impl Send + Sync for pci::Device
  rust: platform: fix unrestricted &mut platform::Device
  rust: pci: fix unrestricted &mut pci::Device
  rust: device: implement device context marker
  rust: pci: use to_result() in enable_device_mem()
  MAINTAINERS: driver core: mark Rafael and Danilo as co-maintainers
  rust/kernel/faux: mark Registration methods inline
  driver core: faux: only create the device if probe() succeeds
  rust/faux: Add missing parent argument to Registration::new()
  rust/faux: Drop #[repr(transparent)] from faux::Registration
  rust: io: fix devres test with new io accessor functions
  rust: io: rename `io::Io` accessors
  kernfs: Move dput() outside of the RCU section.
  efi: rci2: mark bin_attribute as __ro_after_init
  rapidio: constify 'struct bin_attribute'
  firmware: qemu_fw_cfg: constify 'struct bin_attribute'
  powerpc/perf/hv-24x7: Constify 'struct bin_attribute'
  ...

samples: rust: add Rust dma test sample driver

2025-03-20T20:44:46+00:00

Add a simple driver to exercise the basics of the Rust DMA
coherent allocator bindings.

Suggested-by: Danilo Krummrich 
Signed-off-by: Abdiel Janulgue 
Acked-by: Danilo Krummrich 
Link: https://lore.kernel.org/r/20250317185345.2608976-4-abdiel.janulgue@gmail.com
[ Renamed Kconfig symbol and moved it up. Migrated to the new
  `authors` key in `module!`. Fixed module name in description
  and typo in commit message. - Miguel ]
Signed-off-by: Miguel Ojeda

samples: rust_misc_device: fix markup in top-level docs

2025-03-17T07:06:07+00:00

The meaning of /// is to document the thing that comes after it, so
currently the example is documentation for the `use core::pin::Pin;`
statement. To write top-level docs (and have them rendered as such in
the html by rustdoc), use //! instead.

This does not change the contents of the docs at all. The only change is
changing /// to //!.

Signed-off-by: Alice Ryhl 
Fixes: 8d9b095b8f89 ("samples: rust_misc_device: Provide an example C program to exercise functionality")
Reviewed-by: Benno Lossin 
Reviewed-by: Christian Schrefl 
Link: https://lore.kernel.org/r/20250313-rust_misc_device_tld-v1-1-a519bced9a6d@google.com
Signed-off-by: Greg Kroah-Hartman

rust: platform: fix unrestricted &mut platform::Device

2025-03-17T07:04:25+00:00

As by now, platform::Device is implemented as:

	#[derive(Clone)]
	pub struct Device(ARef);

This may be convenient, but has the implication that drivers can call
device methods that require a mutable reference concurrently at any
point of time.

Instead define platform::Device as

	pub struct Device(
		Opaque,
		PhantomData,
	);

and manually implement the AlwaysRefCounted trait.

With this we can implement methods that should only be called from
bus callbacks (such as probe()) for platform::Device. Consequently,
we make this type accessible in bus callbacks only.

Arbitrary references taken by the driver are still of type
ARef and hence don't provide access to methods that are
reserved for bus callbacks.

Fixes: 683a63befc73 ("rust: platform: add basic platform device / driver abstractions")
Reviewed-by: Benno Lossin 
Signed-off-by: Danilo Krummrich 
Acked-by: Boqun Feng 
Link: https://lore.kernel.org/r/20250314160932.100165-5-dakr@kernel.org
Signed-off-by: Greg Kroah-Hartman

rust: pci: fix unrestricted &mut pci::Device

2025-03-17T07:04:25+00:00

As by now, pci::Device is implemented as:

	#[derive(Clone)]
	pub struct Device(ARef);

This may be convenient, but has the implication that drivers can call
device methods that require a mutable reference concurrently at any
point of time.

Instead define pci::Device as

	pub struct Device(
		Opaque,
		PhantomData,
	);

and manually implement the AlwaysRefCounted trait.

With this we can implement methods that should only be called from
bus callbacks (such as probe()) for pci::Device. Consequently, we
make this type accessible in bus callbacks only.

Arbitrary references taken by the driver are still of type
ARef and hence don't provide access to methods that are
reserved for bus callbacks.

Fixes: 1bd8b6b2c5d3 ("rust: pci: add basic PCI device / driver abstractions")
Reviewed-by: Benno Lossin 
Signed-off-by: Danilo Krummrich 
Acked-by: Boqun Feng 
Link: https://lore.kernel.org/r/20250314160932.100165-4-dakr@kernel.org
Signed-off-by: Greg Kroah-Hartman

rust: module: introduce `authors` key

2025-03-10T14:12:17+00:00

In the `module!` macro, the `author` field is currently of type `String`.

Since modules can have multiple authors, this limitation prevents
specifying more than one.

Add an `authors` field as `Option>` to allow creating
modules with multiple authors, and change the documentation and all
current users to use it. Eventually, the single `author` field may
be removed.

[ The `modinfo` key needs to still be `author`; otherwise, tooling
  may not work properly, e.g.:

      $ modinfo --author samples/rust/rust_print.ko
      Rust for Linux Contributors

  I have also kept the original `author` field (undocumented), so
  that we can drop it more easily in a kernel cycle or two.

    - Miguel ]

Suggested-by: Miguel Ojeda 
Link: https://github.com/Rust-for-Linux/linux/issues/244
Reviewed-by: Charalampos Mitrodimas 
Reviewed-by: Alice Ryhl 
Reviewed-by: Andreas Hindborg 
Signed-off-by: Guilherme Giacomo Simoes 
Link: https://lore.kernel.org/r/20250309175712.845622-2-trintaeoitogc@gmail.com
[ Fixed `modinfo` key. Kept `author` field. Reworded message
  accordingly. Updated my email. - Miguel ]
Signed-off-by: Miguel Ojeda

rust/faux: Add missing parent argument to Registration::new()

2025-02-28T02:03:17+00:00

A little late in the review of the faux device interface, we added the
ability to specify a parent device when creating new faux devices - but
this never got ported over to the rust bindings. So, let's add the missing
argument now so we don't have to convert other users later down the line.

Signed-off-by: Lyude Paul 
Cc: Greg Kroah-Hartman 
Link: https://lore.kernel.org/r/20250227193522.198344-1-lyude@redhat.com
Signed-off-by: Greg Kroah-Hartman

rust: io: rename `io::Io` accessors

2025-02-22T14:44:19+00:00

Rename the I/O accessors provided by `Io` to encode the type as
number instead of letter. This is in preparation for Port I/O support
to use a trait for generic accessors.

Add a `c_fn` argument to the accessor generation macro to translate
between rust and C names.

Suggested-by: Danilo Krummrich 
Link: https://rust-for-linux.zulipchat.com/#narrow/channel/288089-General/topic/PIO.20support/near/499460541
Signed-off-by: Fiona Behrens 
Acked-by: Danilo Krummrich 
Acked-by: Daniel Almeida 
Reviewed-by: Greg Kroah-Hartman 
Link: https://lore.kernel.org/r/20250217-io-generic-rename-v1-1-06d97a9e3179@kloenk.dev
Signed-off-by: Greg Kroah-Hartman

rust/kernel: Add faux device bindings

2025-02-13T15:58:58+00:00

This introduces a module for working with faux devices in rust, along with
adding sample code to show how the API is used. Unlike other types of
devices, we don't provide any hooks for device probe/removal - since these
are optional for the faux API and are unnecessary in rust.

Signed-off-by: Lyude Paul 
Cc: Maíra Canal 
Cc: Danilo Krummrich 
Cc: Miguel Ojeda 
Acked-by: Danilo Krummrich 
Link: https://lore.kernel.org/r/2025021026-exert-accent-b4c6@gregkh
Signed-off-by: Greg Kroah-Hartman