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kernel-source-code-drivers: add libgpiod for userspace driver #246

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Oct 28, 2024
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kernel-source-code-drivers: add libgpiod for userspace driver #246

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6 changes: 3 additions & 3 deletions slides/kernel-source-code-drivers/kernel-source-code-drivers.tex
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Expand Up @@ -245,12 +245,12 @@ \subsection{Linux kernel source code}
\begin{frame}
\frametitle{User space device drivers 1/2}
\begin{itemize}
\item The kernel provides certain mechanisms to access hardware
directly from userspace:
\item The kernel provides some mechanisms to access hardware from userspace:
\begin{itemize}
\item USB devices with {\em libusb}, \url{https://libusb.info/}
\item SPI devices with {\em spidev}, \kdochtml{spi/spidev}
\item I2C devices with {\em i2cdev}, \kdochtml{i2c/dev-interface}
\item GPIOs with {\em libgpiod}, \url{https://libgpiod.readthedocs.io}
\item Memory-mapped devices with {\em UIO}, including interrupt
handling, \kdochtml{driver-api/uio-howto}
\end{itemize}
Expand All @@ -264,7 +264,7 @@ \subsection{Linux kernel source code}
\item Certain classes of devices like printers and scanners do not
have any kernel support, they have always been handled in user space
for historical reasons.
\item Otherwise this is *not* how the system should be
\item Otherwise this is {\bf \em not} how the system should be
architectured. Kernel drivers should always be preferred!
\end{itemize}
\end{frame}
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