[MinnowBoard] UART ports configuration issues

[Orozco, Edgar Alexis]

Hello everybody!

I am experiencing an issue with UART ports: here's the output of setserial -ag /dev/ttyS*

/dev/ttyS0, Line 0, UART: 16550A, Port: 0x03f8, IRQ: 4
                Baud_base: 115200, close_delay: 50, divisor: 0
                closing_wait: 3000
                Flags: spd_normal skip_test auto_irq

/dev/ttyS1, Line 1, UART: unknown, Port: 0x02f8, IRQ: 3
                Baud_base: 115200, close_delay: 50, divisor: 0
                closing_wait: 3000
                Flags: spd_normal skip_test auto_irq

/dev/ttyS2, Line 2, UART: unknown, Port: 0x03e8, IRQ: 4
                Baud_base: 115200, close_delay: 50, divisor: 0
                closing_wait: 3000
                Flags: spd_normal skip_test auto_irq

/dev/ttyS3, Line 3, UART: unknown, Port: 0x02e8, IRQ: 3
                Baud_base: 115200, close_delay: 50, divisor: 0
                closing_wait: 3000
                Flags: spd_normal auto_irq

ttyS0 is working OK since I am using it as a serial console.
I noticed that the dmesg output was commonly showing "ttySX MMIO at 0x<address>". Not anymore!.
I thought it was related to a BIOS configuration (just like Intel NUC's)... but I was not able to find something related to it.

Any thoughts ?
Thank you very much!


Alexis O. De la Vega
Software Engineer
CIDEC Queretaro Technical Center
Circuito Palma Cocotera No.2059
Fraccionamiento Palmares. Querétaro, Qro
edgar.alexis.orozco at delphi.com<mailto:edgar.alexis.orozco at delphi.com>

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