October 2017
Intermediate to advanced
586 pages
14h 8m
English
Content preview from Linux Device Drivers Development
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The integer-based GPIO interface – legacy
The integer-based interface is the most well-known. The GPIO is identified by an integer, which is used for every operation that needs to be performed on the GPIO. The following is the header that contains legacy GPIO access functions:
#include <linux/gpio.h>
There are well known functions to handle GPIO in the kernel.