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Fintek F81966 is a LPC/eSPI to 6 UARTs SuperIO. It has fully compatible with F81866. It's also need check the IRQ mode with system assigned. F81966 IRQ Mode setting: 0xf0 Bit1: IRQ_MODE0 Bit0: Share mode (always on) 0xf6 Bit3: IRQ_MODE1 Level/Low: IRQ_MODE0:0, IRQ_MODE1:0 Edge/High: IRQ_MODE0:1, IRQ_MODE1:0 Signed-off-by: Ji-Ze Hong (Peter Hong) <hpeter+linux_kernel@gmail.com> Cc: Ji-Ze Hong (Peter Hong) <peter_hong@fintek.com.tw> Link: https://lore.kernel.org/r/20200528022429.32078-1-hpeter+linux_kernel@gmail.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>