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I have a custom board with several GPIO. I'd like to:

  • give them a friendly name
  • be able to get the level at boot time
  • define active high/low

I defined the GPIO as hogs like this

&gpio5 { ext_gpio_2 { gpio-hog; gpios = <26 GPIO_ACTIVE_LOW>; input; line-name = "ext_gpio_2"; }; };

With this, I set the GPIO direction at boot and have the correct name listed when I call gpioinfo gpiochip4. The problem is that the GPIO is labeled as [used], and I get Device or resource busy error when trying to get its level.

How can I avoid the [used] status and be able to control the GPIO?

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