Linux 4.19 released, Bootlin contributions

With the 4.19 released last week by Greg Kroah-Hartman (and not Linus), it’s time to have a look at our contributions for this release.

As always, LWN.net did an interesting coverage of this release cycle merge window, highlighting the most important changes: the first half of the 4.19 merge window and the rest of the 4.19 merge window. For 4.19 only, Bootlin contributed a total of 295 patches, which puts us at the 10th place in the ranking of most contributing companies according to KPS.

Also according to LWN statistics, Bootlin’s engineer Boris Brezillon is the 16th most active developer in terms of commits for this release with a total of 85.

The main highlights of our contributions are:

For Marvell platforms:
- Antoine Ténart made a few fixes and improvements to the inside-secure cryptographic engine driver and contributed support for SHA512, SHA384 and eip197d. This crypto engine is used on Marvell Armada 3700 and 7K/8K,
- Maxime Chevallier added support for Receive Side Scaling (RSS), in the PPv2 Ethernet controller driver found on Marvell 7K and 8K platforms,
- Gregory Clement added support for Adaptative Voltage Scaling (AVS) used by DVFS and more specifically by CPUfreq on Armada 37xx platforms,
- Miquèl Raynal added support for suspend/resume in the pinctrl driver for Marvell Armada 37xx family,
- Miquèl Raynal added support for multi-channel sensor in the thermal driver for Marvell SoCs,
- Thomas Petazzoni fixed a few bugs found in the PCI mvebu controller driver,
In the MTD subsystem:
- Boris Brezillon contributed the support for the MX35LF1GE4AB SPI NAND chip,
- Miquèl Raynal added the support for the MX35LF2GE4AB SPI NAND chip,
- Miquèl Raynal converted NAND drivers to the added nand_scan() hook,
- Miquèl Raynal and Boris Brezillon continued their cleanup of the NAND subsystem,
For Microsemi Ocelot platforms:
- Alexandre Belloni added link aggregation hardware offload support to the Ethernet switch driver that was contributed in Linux 4.18,
- Antoine Ténart contributed VLAN support also in the Ethernet switch driver that was contributed in Linux 4.18,
- Alexandre Belloni added support for the SPI controllers,
- Quentin Schulz added support for the interrupt controller on GPIO pins,
For Allwinner platforms:
- Boris Brezillon fixed an overflow in the dotclock driver of the Allwinner DRM driver,
- Paul Kocialkowski fixed an issue in the DRM driver on sun8i SoC family where planes untouched by an atomic commit are not displayed,
- Maxime Ripard added support for the C1 SRAM region on sun5i, sun7i and sun8i SoC families, which was needed to support the VPU (coming in future Linux kernel versions)
Maxime Chevallier improved PIO transfers on the SPI imx driver to support non-multiple of 8 bits_per_word and dynamic_burst transfers,

Bootlin engineers are not only contributors, but also maintainers of various subsystems in the Linux kernel, which means they are involved in the process of reviewing, discussing and merging patches contributed to those subsystems:

Maxime Ripard, as the Allwinner platform co-maintainer, merged 93 patches from other contributors
Boris Brezillon, as the MTD/NAND maintainer, merged 38 patches from other contributors
Miquèl Raynal, as the NAND co-maintainer, merged 110 patches from other contributors
Alexandre Belloni, as the RTC and Microsemi maintainer and Atmel platform co-maintainer, merged 38 patches from other contributors
Grégory Clement, as the Marvell EBU co-maintainer, merged 16 patches from other contributors

Here is the commit by commit detail of our contributions to 4.19:

Author: Quentin Schulz

Quentin Schulz was an engineer at Bootlin between 2016 and 2018. See https://bootlin.com/company/staff/quentin-schulz/ for details. View all posts by Quentin Schulz

Author: Quentin Schulz

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