tree 21e57956bbbbcb623cb7c55a419247b1ebf949d7
parent d7c51b47ac11e66f547b55640405c1c474642d72
author Linus Walleij <linus.walleij@linaro.org> 1461660429 +0200
committer Linus Walleij <linus.walleij@linaro.org> 1465975744 +0200

tools/gpio: add the gpio-hammer tool

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
supplied.

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: Michael Welling <mwelling@ieee.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>