• Linus Walleij's avatar
    tools/gpio: add the gpio-hammer tool · 2a144dd0
    Linus Walleij authored
    The gpio-hammer is used from userspace as an example of how
    to retrieve a GPIO handle for one or several GPIO lines and
    hammer the outputs from low to high and back again. It will
    pulse the selected lines once per second for a specified
    number of times or indefinitely if no loop count is
    Example output:
    $ gpio-hammer -n gpiochip0 -o5 -o6 -o7
    Hammer lines [5, 6, 7] on gpiochip0, initial states: [1, 1, 1]
    [-] [5: 0, 6: 0, 7: 0]
    Tested-by: default avatarMichael Welling <mwelling@ieee.org>
    Signed-off-by: default avatarLinus Walleij <linus.walleij@linaro.org>
gpio-hammer.c 4.27 KB