buildroot

config BR2_PACKAGE_C_PERIPHERY

    bool "c-periphery"

    help

      c-periphery is a set of C wrapper functions for GPIO, SPI,

      I2C, MMIO, and Serial peripheral I/O interface access in

      userspace Linux. The c-periphery wrappers simplify and

      consolidate the native Linux APIs to these

      interfaces. c-periphery is useful in embedded Linux

      environments (including BeagleBone, Raspberry Pi,

      etc. platforms) for interfacing with external

      peripherals. c-periphery is re-entrant, uses static

      allocations, has no dependencies outside the standard C

      library and Linux, compiles into a static library for easy

      integration with other projects, and is MIT licensed.

​

      https://github.com/vsergeev/c-periphery