p1010 ttyS1 input/output error

jungong — Fri, 01 Jun 2018 08:14:49 GMT

HI to all, please help me!

ttyS0 and ttyS1 both used duart1 of p1010.

/dev/ttyS0 and /dev/ttyS1 can open success both, ttyS0 all is ok, but ttyS1 log input/output error when call tcgetattr().

The kernel message about serial in startup as following:

/////////////////////////////////////////

Serial 825016550 driver, 2 ports, IRQ sharing enabled
serial8250.0 ttyS0 at MMIO 0xffe04500 (irq = 42, base_baud = 25000000) is a 16550A
console [ttyS0] enabled, bootconsole disabled
console [ttyS0] enabled, bootconsole disabled

//////////////////////////////////////////

As above showing, there is no about ttyS1 message,but this two uart is configured in dts, as following:

///////////////////////////////////////////////////

serial0: serial@4500 {
cell-index = <0>;
device_type = "serial";
compatible = "fsl,ns16550", "ns16550";
reg = <0x4500 0x100>;
clock-frequency = <0>;
interrupts = <42 2 0 0>;
};

serial1: serial@4600 {
cell-index = <1>;
device_type = "serial";
compatible = "fsl,ns16550", "ns16550";
reg = <0x4600 0x100>;
clock-frequency = <0>;
interrupts = <42 2 0 0>;
};

///////////////////////////////////////////////

There is more as following:

///////////////////////////////////////////

root@p1010rdb-pb:/proc/tty/driver# cat serial
serinfo:1.0 driver revision:
0: uart:16550A mmio:0xFFE04500 irq:42 tx:1779 rx:236 RTS|DTR
1: uart:unknown port:00000000 irq:0

//////////////////////////////////////////////////////

Why no message about ttyS1? Why ttyS1 can not use?

Please help me !

Thanks.

Re: p1010 ttyS1 input/output error

alexander_yakov — Sat, 02 Jun 2018 05:24:50 GMT

Please look this community topic:

https://community.nxp.com/thread/387283

Hope it will be helpful

Have a great day,
Alexander
TIC

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Re: p1010 ttyS1 input/output error

jungong — Mon, 04 Jun 2018 08:37:28 GMT

Thank you very much!

It solves my problem.

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