linux/samples/rust/rust_misc_device.rs, branch v6.16

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

2025-04-01T18:26:08Z

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() ...

samples: rust_misc_device: fix markup in top-level docs

2025-03-17T07:06:07Z

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: module: introduce `authors` key

2025-03-10T14:12:17Z

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

samples: rust_misc_device: Provide an example C program to exercise functionality

2024-12-16T15:12:56Z

Here is the expected output (manually spliced together): USERSPACE: Opening /dev/rust-misc-device for reading and writing KERNEL: rust_misc_device: Opening Rust Misc Device Sample USERSPACE: Calling Hello KERNEL: rust_misc_device: IOCTLing Rust Misc Device Sample KERNEL: rust_misc_device: -> Hello from the Rust Misc Device USERSPACE: Fetching initial value KERNEL: rust_misc_device: IOCTLing Rust Misc Device Sample KERNEL: rust_misc_device: -> Copying data to userspace (value: 0) USERSPACE: Submitting new value (1) KERNEL: rust_misc_device: IOCTLing Rust Misc Device Sample KERNEL: rust_misc_device: -> Copying data from userspace (value: 1) USERSPACE: Fetching new value KERNEL: rust_misc_device: IOCTLing Rust Misc Device Sample KERNEL: rust_misc_device: -> Copying data to userspace (value: 1) USERSPACE: Attempting to call in to an non-existent IOCTL KERNEL: rust_misc_device: IOCTLing Rust Misc Device Sample KERNEL: rust_misc_device: -> IOCTL not recognised: 20992 USERSPACE: ioctl: Succeeded to fail - this was expected: Inappropriate ioctl for device USERSPACE: Closing /dev/rust-misc-device KERNEL: rust_misc_device: Exiting the Rust Misc Device Sample USERSPACE: Success Signed-off-by: Lee Jones Link: https://lore.kernel.org/r/20241213134715.601415-6-lee@kernel.org Signed-off-by: Greg Kroah-Hartman

samples: rust_misc_device: Demonstrate additional get/set value functionality

2024-12-16T15:12:53Z

Expand the complexity of the sample driver by providing the ability to get and set an integer. The value is protected by a mutex. Signed-off-by: Lee Jones Link: https://lore.kernel.org/r/20241213134715.601415-4-lee@kernel.org Signed-off-by: Greg Kroah-Hartman

samples: rust: Provide example using the new Rust MiscDevice abstraction

2024-12-16T15:12:45Z

This sample driver demonstrates the following basic operations: * Register a Misc Device * Create /dev/rust-misc-device * Provide open call-back for the aforementioned character device * Operate on the character device via a simple ioctl() * Provide close call-back for the character device Signed-off-by: Lee Jones Reviewed-by: Danilo Krummrich Link: https://lore.kernel.org/r/20241213134715.601415-3-lee@kernel.org Signed-off-by: Greg Kroah-Hartman