Bootlin contributions to Linux 5.14 and 5.15

It’s been a while we haven’t posted about Bootlin contributions to the Linux kernel, and in fact missed both the Linux 5.14 and Linux 5.15 releases, which we will cover in this blog post.

Linux 5.14 was released on August 29, 2021. The usual page and the LWN articles on the merge window (part 1 and part 2) provide the best summaries of the new features and hardware support offered by this release.

Linux 5.15 on the other hand was released on November 1, 2021. Here as well, we have a great article and LWN articles on the merge window (part 1 and part 2).

In total for those two releases, Bootlin contributed 79 commits, in various areas:

  • Alexandre Belloni, as the RTC subsystem maintainer, contributed 9 patches improving various aspects of RTC drivers, the RTC subsystem or Device Tree bindings for RTC
  • Clément Léger contributed a small improvement to the at_xdmac driver used on Microchip ARM platforms
  • Hervé Codina enabled Ethernet support on the old ST Spear320 SoC, by leveraging the existing stmmac Ethernet controller driver
  • Maxime Chevallier fixed a small issue with the Ethernet PHY on the i.MX6 Solidrun system-on-module
  • Miquèl Raynal added support for NV-DDR timings in the MTD susbsystem. This allows to improve performance with NAND flash memories that support those timings. Their usage is specifically implemented in the Arasan NAND controller driver, which Miquèl contributed back in Linux 5.8. See our previous blog post on this topic for more details
  • Miquèl Raynal added support for yet another NAND controller driver, the ARM PL35x, which is used for example on Xilinx Zynq 7000. See our previous blog post on this topic.
  • Miquèl Raynal added support for NAND chips with large pages (larger than 4 KB) to the OMAP GPMC driver.
  • Miquèl Raynal made a few fixes to the IIO driver for the max1027 ADC.
  • Paul Kocialkowski contributed a few patches to enable usage of the Hantro video decoder driver on the Rockchip PX30 processor.
  • Thomas Perrot contributed one patch to enable usage of the Flex Timers on i.MX7, and one to fix an issue in the PL022 SPI controller driver.

And now, as usual the complete list of our contributions to Linux 5.14 and 5.15:

Author: Thomas Petazzoni

Thomas Petazzoni is Bootlin's co-owner and CEO. Thomas joined Bootlin in 2008 as a kernel and embedded Linux engineer, became CTO in 2013, and co-owner/CEO in 2021. More details...

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