2009/7/14, Martyn Welch <martyn.welch@xxxxxxxxxxx>:
> vichy wrote:
>
> > Dear all:
> > while tracing 8250.c, serial8250_init, I find all the ports are
> > assigned with the same uart_driver 8250 as below:
> > static struct uart_driver serial8250_reg = {
> > .owner = THIS_MODULE,
> > .driver_name = "serial",
> > .dev_name = "ttyS",
> > .major = TTY_MAJOR,
> > .minor = 64,
> > .nr = UART_NR,
> > .cons = SERIAL8250_CONSOLE,
> > };
> >
> > what make me curious is the minor# above is 64, but the minor number
> > of /dev/ttyS1 is 65.
> >
> >
>
> Numbering starts at 0, the first serial port (/dev/ttyS0) is assigned minor
> 64.
hi:
Thanks for your reminding.
What makes me curious is how kernel connect /dev/ttyS1 with serial driver?
By port number or minor number?
I can see the minor of /dev/ttyS0 is 64, and serial driver is also
register as minor 64.
But what about /dev/ttyS1?
appreciate your kind help,
vichy
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