Optionally the `pins' file created inside the `/sys/kernel/debug/pinctrl' subdirectory of each pin controller device now allows you to set the mux register of a pin. Signed-off-by: Dario Binacchi <dariobin@xxxxxxxxx> --- (no changes since v1) Documentation/driver-api/pin-control.rst | 3 +++ 1 file changed, 3 insertions(+) diff --git a/Documentation/driver-api/pin-control.rst b/Documentation/driver-api/pin-control.rst index e2474425fb0c..3d8192fa45a3 100644 --- a/Documentation/driver-api/pin-control.rst +++ b/Documentation/driver-api/pin-control.rst @@ -1447,6 +1447,9 @@ controller device containing these files: - ``pins``: prints a line for each pin registered on the pin controller. The pinctrl driver may add additional information such as register contents. + Optionally writes the mux register for the selected pin. + e.g. to write the value 0x73 in the mux register of pin 19: + echo 19 0x73 >/sys/kernel/debug/pinctrl/pins - ``gpio-ranges``: print ranges that map gpio lines to pins on the controller -- 2.17.1
