if the GPIOHANDLE_REQUEST_OUTPUT is set in flags, this specifies the default output value, should be 0 (low) or 1 (high), anything else than 0 or 1 will be interpreted as 1 (high)
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if the GPIOHANDLE_REQUEST_OUTPUT is set in flags, this specifies the default output value, should be 0 (low) or 1 (high), anything else than 0 or 1 will be interpreted as 1 (high)