MYiR MYD-JX8MX Series, Development Manual

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4.9 GPIO test
How to convert GPIO pin to corresponding value? GPION_IOM = (N-1)*32+M
For example, the 8th pin of J22 (SAI1_TXFS) GPIO (4, 10), then the corresponding node is (4-1) * 32 + 10 = 106
The GPIO test steps are as follows:
1. Dts configuration corresponding pin pin for GPIO mode
2. Export node echo 106 > /sys/class/gpio/export
3. Set direction echo out > /sys/class/gpio/gpio106/direction
4. Set to 1 echo 1 > /sys/class/gpio/gpio106/value
4-9-1 set SAI1_TXFS to gpio func
4.9 GPIO test
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