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Kernel: SparkFun Qwiic Joystick, Intel Graphics Compiler, and More

Submitted by Roy Schestowitz on Monday 21st of June 2021 03:52:18 PM Filed under
Linux
  • Linux 5.14 To Add Driver For A $10 Open-Source Joystick For DIY Electronics Projects - Phoronix

    Linux 5.14 is bringing a new input driver to support an open-source joystick that can be used for DIY electronics purposes and other use-cases. The schematics and firmware are open-source for building the joystick device yourself or can be purchased for about $10 USD.

    This new driver on the way to mainline is the qwiic-joystick driver that has been queued in the input subsystem's "-next" branch ahead of the Linux 5.14 merge window. This driver is for the SparkFun Qwiic Joystick, which is an open-source mini analog joystick built around a microcontroller and two potentiometers connected with a gimbal mechanism. Input events are in turn polled over the I2C bus.

  • Intel Graphics Compiler 1.0.7683 Ships With Many Changes

    Last week Intel shipped a big update to their open-source Intel Graphics Compiler "IGC" that is used currently by their Windows driver, their Linux compute stack, and potentially their Linux graphics drivers moving ahead.

    The Intel IGC 1.0.7683 update has dozens of changes including a few notable items for this routine open-source update.

  • The Unix background of Linux's 'file-max' and nr_open kernel limits on file descriptors

    Having two separate limits even on kernels which dynamically allocate these things makes some sense, but not necessarily a lot of it. A limit on the number of file descriptors that a single process can have open at once will save you from a program with a coding error that leaks open files (especially if it leaks them rapidly). A separate limit on the total number of open file descriptors across all processes is effectively a limit on the amount of memory one area of the kernel can lock down, which is at least potentially useful.

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