Author: Thomas Petazzoni

Linux 6.3 has been released yesterday, right on schedule. As usual, see the LWN.net articles that covered the 6.3 merge window (part 1 and part 2) as well as the KernelNewbies page.

For this release, Bootlin engineers contributed a total of 66 commits, with the following highlights:

• Alexandre Belloni, as the RTC subsystem maintainer, contributed a number of patches to RTC drivers: add support for ACPI-based probing to two RTC drivers, convert a number of RTC drivers to use the fwnode API to retrieve IRQ flags
• Alexis Lothoré contributed a fix for a regression in the FPGA subsystem
• Clément Léger contributed a fix for a reference count issue found while testing Device Tree overlays and also contributed a minor cleanup to the pcs-rzn1-miic he contributed sometime ago.
• Hervé Codina contributed a full new driver to support the USB Device controller found in Renesas RZ/N1 processors: renesas_usbf, together with the corresponding Device Tree binding description, Device Tree files updates, as well as an update to the Renesas clock driver
• Hervé Codina also contributed two new audio codec drivers: one for the Renesas IDT821034 codec and one for the Infineon PEB2466 codec
• Miquèl Raynal contributed a significant number of updates to the IEEE 802.15.4 stack of the Linux kernel, most notably implementing passive scanning support as well as beaconing support.
• Paul Kocialkowski contributed a number of fixes for the Allwinner sun6i-csi camera interface driver, the Allwinner MIPI CSI2 bridge driver as well as the Allwinner sun6i-isp ISP driver, following previous contributions he made on all those multimedia drivers

Here are the details of our contributions, commit by commit:

• Alexandre Belloni (15):
  • rtc: ab-eoz9: use IRQ flags obtained from fwnode
  • rtc: hym8563: use IRQ flags obtained from fwnode
  • rtc: m41t80: use IRQ flags obtained from fwnode
  • rtc: pcf2123: use IRQ flags obtained from fwnode
  • rtc: pcf85063: use IRQ flags obtained from fwnode
  • rtc: pcf8523: use IRQ flags obtained from fwnode
  • rtc: pcf85363: use IRQ flags obtained fromfwnode
  • rtc: pcf8563: use IRQ flags obtained from fwnode
  • rtc: rv3029c2: use IRQ flags obtained from fwnode
  • rtc: rv3032: use IRQ flags obtained from fwnode
  • rtc: rv8803: use IRQ flags obtained from fwnode
  • rtc: rx8010: use IRQ flags obtained from fwnode
  • rtc: rv3028: add ACPI support
  • rtc: rv3032: add ACPI support
  • rtc: allow rtc_read_alarm without read_alarm callback
• Alexis Lothoré (1):
  • fpga: bridge: properly initialize bridge device before populating children
• Clément Léger (2):
  • of/irq: add missing of_node_put() for interrupt parent node
  • net: pcs: rzn1-miic: remove unused struct members and use miic variable
• Herve Codina (13):
  • dt-bindings: usb: add the Renesas RZ/N1 USBF controller
  • soc: renesas: r9a06g032-sysctrl: Handle h2mode setting based on USBF presence
  • usb: gadget: udc: add Renesas RZ/N1 USBF controller support
  • ARM: dts: r9a06g032: Add the USBF controller node
  • MAINTAINERS: add the Renesas RZ/N1 USBF controller entry
  • clk: renesas: r9a06g032: Handle h2mode setting based on USBF presence
  • ARM: dts: r9a06g032: Add the USBF controller node
  • ASoC: Add Renesas IDT821034 codec bindings
  • ASoC: codecs: Add support for the Renesas IDT821034 codec
  • MAINTAINERS: add the Renesas IDT821034 codec entry
  • ASoC: dt-bindings: Add the Infineon PEB2466 codec
  • ASoC: codecs: Add support for the Infineon PEB2466 codec
  • MAINTAINERS: add the Infineon PEB2466 codec entry
• Luca Ceresoli (3):
  • ASoC: fsl-asoc-card: constify fsl_asoc_card_dai
  • scripts/spelling.txt: add “exsits” pattern and fix typo instances
  • ASoC: clarify that SND_SOC_IMX_SGTL5000 is the old driver
• Miquel Raynal (22):
  • ieee802154: Add support for user scanning requests
  • ieee802154: Define a beacon frame header
  • ieee802154: Introduce a helper to validate a channel
  • mac802154: Prepare forcing specific symbol duration
  • mac802154: Add MLME Tx locked helpers
  • mac802154: Handle passive scanning
  • mtd: rawnand: Check the data only read pattern only once
  • mtd: rawnand: Prepare the late addition of supported operation checks
  • mtd: rawnand: Fix nand_chip kdoc
  • mtd: spi-nor: Create macros to define chip IDs and geometries
  • ieee802154: Add support for user beaconing requests
  • mac802154: Handle basic beaconing
  • mac802154: Avoid superfluous endianness handling
  • ALSA: doc: Fix PCM interface section typos
  • ieee802154: Use netlink policies when relevant on scan parameters
  • ieee802154: Convert scan error messages to extack
  • ieee802154: Change error code on monitor scan netlink request
  • mac802154: Send beacons using the MLME Tx path
  • mac802154: Fix an always true condition
  • ieee802154: Drop device trackers
  • ieee802154: Prevent user from crashing the host
  • mtd: rawnand: nandsim: Artificially prevent sequential page reads
• Paul Kocialkowski (10):
  • media: sun6i-csi: bridge: Error out on invalid port to fix warning
  • media: sun6i-csi: capture: Remove useless ret initialization
  • media: sun6i-mipi-csi2: Clarify return code handling in stream off path
  • media: sun8i-a83t-mipi-csi2: Clarify return code handling in stream off path
  • media: sun6i-isp: proc: Fix return code handling in stream off path
  • media: sun6i-isp: proc: Error out on invalid port to fix warning
  • media: sun6i-isp: proc: Declare subdev ops as static
  • media: sun6i-isp: capture: Fix uninitialized variable use
  • media: sun6i-isp: params: Fix incorrect indentation
  • media: sun6i-isp: params: Unregister pending buffer on cleanup

Back in November 2022, we announced the availability of a new training course titled Linux debugging, profiling, tracing and performance analysis.

At the time, this training course was still being prepared, but since then Bootlin engineer Clément Léger finished the preparation and successfully delivered the training course to a group of participants.

We are now happy to announce the availability of the training materials corresponding to this course, continuing Bootlin’s long commitment of free availability of all its training materials. On the training page, you can access:

• the slides
• the lab instructions
• the lab data

We have a public on-line session of this course planned on January 30-February 2 which is full, but we have a few seats left for the next session on March 20-23, registration available on-line.

We will of course schedule other public on-line sessions of this course this year. If you have a sufficiently large group of participants to train, we also offer private on-line and private on-site sessions.

The icon used in this blog post comes from flaticon.com.

Bootlin is really happy to welcome another engineer in its team: Jérémie Dautheribes, who joined us on November 2, 2022.

Jérémie Dautheribes graduated in 2020 with a master degree in Ambiant, Mobile and Embedded Systems from the Toulouse University. After graduating, he worked at the french research institute INRIA on cache optimization for FreeRTOS multicore programs, and then in a company called EPSI where he was in charge of developing and maintaining Linux-based BSPs for i.MX6 and Tegra platforms, based on Yocto.

In addition, Jérémie has some experience in using the Rust programming language for low-level development, a skill that might prove to be useful for doing Linux kernel development in the future!

Jérémie is now joining our team located in Toulouse, France, where he will work at our office with Hervé Codina, Paul Kocialkowski, Köry Maincent, Thomas Perrot, Miquèl Raynal and Thomas Petazzoni.

For more details, see Jérémie’s page on Bootlin.com and his LinkedIn profile.