The hwmon subsystem originates from the 1998 project lm-sensors. Along the way, there have been a lot of effort done to have all drivers present a standard interface to user-space, and consolidate the common plumbing into an easy-to-use, hard-to-get-wrong API. The...
UARTs and RS-232 have been around since the 1960s, and despite the advent of technologies like USB and PCIe, it seems UART-attached devices are not going away anytime soon. In embedded systems, UARTs are a commonly used peripheral interface (e.g. for Bluetooth, NFC,...
Since linux 4.8 the GPIO sysfs interface is deprecated. Due to its many drawbacks and bad design decisions a new user space interface has been implemented in the form of the GPIO character device which is now the preferred method of interaction with GPIOs which can’t...
SD and eMMC devices are widely present on Linux systems and became on some products the primary storage medium. One of the key feature for storage is the speed of the bus accessing the data. Since the introduction of the original “default” (DS) and “high speed” (HS)...
The kernel is great at doing its job for your task, providing unified access to hardware, filesystem, network, scheduling your code when you need to, … But can’t it all be done quietly please, because your application is sensitive to headaches and is having a hard...
