Hi,

On Thu Jul 23, 2026 at 1:14 PM CEST, Yu-Chun Lin [林祐君] wrote:
> Regarding the hardware, this controller indeed has dedicated and separate
> bits for IN, OUT, and DIR. If configured as an output, reading the IN bit
> does not reflect the actual state, so we must check the DIR bit first to
> know which bit to read.

Just out of curiosity, the out bit is also the control bit which
will set the gpio line state, correct? IOW, you are reading just the
bit you've set before and there is no way to read the real line
state.

-michael