From: liran raz <hidden> Date: 2009-03-13 19:01:22
hi,
I've configured SCC1 to be serial uart driver.
(in addition to SMC1 & SMC2 that were already configured
as UARTs).
Now I can see these defines in .config file:
CONFIG_SERIAL_CPM_SCC1=y
CONFIG_SERIAL_CPM_SMC1=y
CONFIG_SERIAL_CPM_SMC2=y
When the kernal starts I see these log messages:
ttyCPM0 at MMIO 0xc505ca80 (irq = 17) is a CPM UART
ttyCPM1 at MMIO 0xc5060a90 (irq = 16) is a CPM UART
ttyCPM2 at MMIO 0xc5064a00 (irq = 40) is a CPM UART
But when I list the devices:
[root@urm dev]# ll ttyCPM*
crw-rw-rw- 1 root root 204, 46 Dec 31 17:00 ttyCPM0
crw-rw-rw- 1 root root 204, 47 Dec 31 17:00 ttyCPM1
I can't see ttyCPM2.
Does anyone know what I'm missing? or what do I need to configure
in order to have: /dev/ttyCPM2 ?
Thanks,
Liran.
From: liran raz <hidden> Date: 2009-03-16 13:39:11
Thanks, I don't see any mdev process running.
Just wonder who is creating /dev/ttyCPM1 since in the device table file
(device_table.txt)
I have only node: 204 (major) 46 (minor) defined.
But I can see /dev/ttyCPM1 (204 47)
Liran.
On Fri, Mar 13, 2009 at 4:18 PM, Timur Tabi [off-list ref] wrote:
On Fri, Mar 13, 2009 at 1:56 PM, liran raz [off-list ref]
wrote:
quoted
Does anyone know what I'm missing? or what do I need to configure
in order to have: /dev/ttyCPM2 ?
My guess is that you don't have udev or mdev running.
--
Timur Tabi
Linux kernel developer at Freescale
From: Scott Wood <hidden> Date: 2009-03-18 18:37:47
On Mon, Mar 16, 2009 at 05:39:08AM -0800, liran raz wrote:
Thanks, I don't see any mdev process running.
Does it run during the boot scripts? Or do you have udev?
Just wonder who is creating /dev/ttyCPM1 since in the device table file
(device_table.txt)
I have only node: 204 (major) 46 (minor) defined.
But I can see /dev/ttyCPM1 (204 47)
Ideally, it would be a program such as udev or mdev. If you're using a
static /dev with no utility to automatically create nodes, then it's *you*
that creates it, with mknod. :-)
-Scott