Hi All.
With helps by Dirk Behme, I got the messages like this.
Linux version : Current GIT kernel
UBoot version : Current GIT uboot
Root File System : provided by DVEVM
[When kernel boots, I got the messages.]
serial8250.0: ttyS0 at MMIO 0x1c20000 (irq = 40) is a 16550A
console [ttyS0] enabled
serial8250.0: ttyS1 at MMIO 0x1c20400 (irq = 41) is a 16550A
serial8250.0: ttyS2 at MMIO 0x1c20800 (irq = 42) is a 16550A
[After booting, I checked this]
[EMAIL PROTECTED]:~# cat /proc/tty/driver/serial
serinfo:1.0 driver revision:
0: uart:16550A mmio:0x01C20000 irq:40 tx:1847 rx:34 RTS|CTS|DTR|DSR
1: uart:16550A mmio:0x01C20400 irq:41 tx:0 rx:0 CTS|DSR
2: uart:16550A mmio:0x01C20800 irq:42 tx:0 rx:0 CTS|DSR
[EMAIL PROTECTED]:~#
[I edited the file /etc/udev/rules.d/compat.rules]
KERNEL="ttyS[0-9]*", SYMLINK="%k"
so I got the messages like this.
[EMAIL PROTECTED]:/etc/udev/rules.d# ls -al /dev/ttyS*
lrwxrwxrwx 1 root root 5 Jan 1 12:00 /dev/ttyS0 -> tts/0
lrwxrwxrwx 1 root root 5 Jan 1 12:00 /dev/ttyS1 -> tts/1
lrwxrwxrwx 1 root root 5 Jan 1 12:00 /dev/ttyS2 -> tts/2
[Question 1]
But, Here's the my question.
When I checked /proc/interruptes. I got this.
[EMAIL PROTECTED]:/etc/udev/rules.d# cat /proc/interrupts
CPU0
0: 0 AINTC dm644xv4l2
8: 31550 AINTC davincifb
12: 1 AINTC musb_hdrc
13: 10348 AINTC EMAC
16: 0 AINTC EDMA
17: 0 AINTC EDMA CC Err
18: 0 AINTC EDMA TC1 Err
19: 0 AINTC EDMA TC2 Err
26: 1053 AINTC mmc0
32: 52699 AINTC clockevent
33: 3 AINTC free-run counter
39: 186 AINTC i2c_davinci
40: 1263 AINTC serial
Err: 0
Why does the serial interrupt appear only uart0 ??
The interrupt number of Uart1 and Uart2 is 41 and 42.
[Question 2] I tested like this.
[EMAIL PROTECTED]:/etc/udev/rules.d# cat /proc/tty/driver/serial
serinfo:1.0 driver revision:
0: uart:16550A mmio:0x01C20000 irq:40 tx:8385 rx:424 RTS|CTS|DTR|DSR
1: uart:16550A mmio:0x01C20400 irq:41 tx:0 rx:0 CTS|DSR
2: uart:16550A mmio:0x01C20800 irq:42 tx:0 rx:0 CTS|DSR
[EMAIL PROTECTED]:/etc/udev/rules.d# echo "hello" > /dev/ttyS1
[EMAIL PROTECTED]:/etc/udev/rules.d# cat /proc/tty/driver/serial
serinfo:1.0 driver revision:
0: uart:16550A mmio:0x01C20000 irq:40 tx:8899 rx:480 RTS|CTS|DTR|DSR
1: uart:16550A mmio:0x01C20400 irq:41 tx:7 rx:0 CTS|DSR
<---- this point
2: uart:16550A mmio:0x01C20800 irq:42 tx:0 rx:0 CTS|DSR
when I tested echo "hello" > /dev/ttyS1, and examined /proc/tty/driver/serial
The number of tx for UART1 increased.
Is it impossible to register serial interrupt for UART1 and UART2?
** Is there anyone to help me with this problems?
Any comments will help us.
Thanks.
Jaehoon.
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