Messages in this thread | | | Date | Wed, 23 Nov 2005 17:02:33 +0100 | From | Marc Koschewski <> | Subject | Re: Christmas list for the kernel |
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* Jon Smirl <jonsmirl@gmail.com> [2005-11-23 10:19:19 -0500]:
> On 11/23/05, Russell King <rmk+lkml@arm.linux.org.uk> wrote: > > On Wed, Nov 23, 2005 at 09:43:58AM -0500, Jon Smirl wrote: > > > My system has: > > > 2 serial > > > > > > In /sys/bus/platform/devices I see this: > > > serial8250 > > > shouldn't there be entries for all of the legacy devices? > > > > > > In /dev > > > ttyS0 > > > ttyS1 > > > ttyS2 > > > ttyS3 > > > > You're basically confused about serial ports. The kernel serial devices > > whether or not hardware is found, to allow programs such as setserial to > > function. > > > > If you disagree with that, there'll be an equal number of people who > > have serial cards that need setserial who will in turn disagree with > > you. > > This is confusing... > > Serial: 8250/16550 driver $Revision: 1.90 $ 4 ports, IRQ sharing disabled > serial8250: ttyS0 at I/O 0x3f8 (irq = 4) is a 16550A > serial8250: ttyS1 at I/O 0x2f8 (irq = 3) is a 16550A > serial8250: ttyS0 at I/O 0x3f8 (irq = 4) is a 16550A > serial8250: ttyS1 at I/O 0x2f8 (irq = 3) is a 16550A > > /sys/bus/platform/devices/serial8250 > [jonsmirl@jonsmirl serial8250]$ ls > bus driver power tty:ttyS0 tty:ttyS1 tty:ttyS2 tty:ttyS3 uevent > [jonsmirl@jonsmirl serial8250]$ >
Mine looks like this.
* Why is the seconf line for ttyS1 missing (as you have one above)? * What does these 'too much work' messages mean? Must have been come in lately...
marc@stiffy:~$ dmesg | grep -i serial Serial: 8250/16550 driver $Revision: 1.90 $ 4 ports, IRQ sharing enabled serial8250: ttyS0 at I/O 0x3f8 (irq = 4) is a 16550A serial8250: ttyS1 at I/O 0x2f8 (irq = 3) is a 16550A serial8250: ttyS0 at I/O 0x3f8 (irq = 4) is a 16550A serial8250: too much work for irq3 serial8250: too much work for irq3 serial8250: too much work for irq3 serial8250: too much work for irq3 serial8250: too much work for irq3 marc@stiffy:~$ ls /sys/bus/platform/devices/serial8250/ insgesamt 0 832 drwxr-xr-x 3 root root 0 2005-11-23 16:57 ./ 12 drwxr-xr-x 7 root root 0 2005-11-23 09:21 ../ 2452535 lrwxrwxrwx 1 root root 0 2005-11-23 16:58 bus -> ../../../bus/platform/ 2452533 lrwxrwxrwx 1 root root 0 2005-11-23 16:58 driver -> ../../../bus/platform/drivers/serial8250/ 833 drwxr-xr-x 2 root root 0 2005-11-23 09:21 power/ 2452534 lrwxrwxrwx 1 root root 0 2005-11-23 16:58 tty:ttyS1 -> ../../../class/tty/ttyS1/ 2452536 --w------- 1 root root 4096 2005-11-23 09:20 uevent marc@stiffy:~$
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