bananapi r2 pro gpio

i want to use led on/off 7 pin (gpio 40 header) but it doesn’t work.

Others work fine:

echo 20 > /sys/class/gpio/export
echo 23 > /sys/class/gpio/export
echo 40 > /sys/class/gpio/export
echo 42 > /sys/class/gpio/export

echo out > /sys/class/gpio/gpio20/direction
echo out > /sys/class/gpio/gpio23/direction
echo out > /sys/class/gpio/gpio40/direction
echo out > /sys/class/gpio/gpio42/direction

echo 1 > /sys/class/gpio/gpio20/value
echo 1 > /sys/class/gpio/gpio23/value
echo 1 > /sys/class/gpio/gpio40/value
echo 1 > /sys/class/gpio/gpio42/value

May be problem in pwm10

               pwm10 {

                    pwm10m0-pins {
                            rockchip,pins = <0x03 0x0d 0x05 0xab>;
                            phandle = <0x9d>;
                    };

                    pwm10m1-pins {
                            rockchip,pins = <0x02 0x01 0x02 0xab>;
                            phandle = <0x1f5>;
                    };

dts attached from firmware - https://www.armbian.com/bananapi-r2-pro/

r2pro.dts

Edited August 19, 20233 yr by Ace Space