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Excluding gpio from Linux

Bennny
Associate II

Hello.

Is there any way to exclude some GPIOs from Linux, when I control them from M4 core and I don't want to give an ability to control them from Linux apps? I would like to exclude e.g. PG12. I tried this, which should be exactly for such use:

&gpiog {
   gpio-reserved-ranges = <12 1>; /* Reserve PG12 for M4 */
};

 
But it doesn't help, still the GPIO is listed and possible to control under Linux.

We use OpenSTLinux custom Yocto build with kernel 5.15.67

Thanks

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