Re: enabling uart2 on omap5912 osk

[Steve Poulsen <spoulsen@css-design.us>]

If you do not have a "c" as the first character in the permissions, then 
your device file is not a true device file, but just a file.  You should 
delete that file (ttyS1) and create the device file:

mknod /dev/ttyS1 c 4 65
mknod /dev/ttyS2 c 4 66

Steve

mohammed shareef wrote:
> hi,
>
> i have changed the line in omap_osk.c to:
>
> static struct omap_uart_config osk_uart_config __initdata = {
>       .enabled_uarts = ((1 << 0) | (1 << 1) | (1 << 2)),
> };
>
> And all the three UARTs are enabled now as i can see in the kernel boot-log:
>
> serial8250.0: ttyS0 at MMIO 0xfffb0000 (irq = 46) is a ST16654
> serial8250.0: ttyS1 at MMIO 0xfffb0800 (irq = 47) is a ST16654
> serial8250.0: ttyS2 at MMIO 0xfffb9800 (irq = 15) is a ST16654
>
> A node called ttyS0 is already there which is linked to uart0.
>
> when i type:
>
> ls -l /dev/ttyS0
> crw-rw-rw-    1 root     root       4,  64 Aug  8  2004
> \0x1b[1;35m/dev/ttyS0\0x1b[0m
> # ls -l /dev/ttyS1
> -rw-r--r--    1 root     root           16 May 21  2008
> \0x1b[0;0m/dev/ttyS1\0x1b[0m
>
> i have a question on the above output. the major and minor number for
> ttyS0 are 4, 64 but fot ttyS1 i dont find a major number. what does
> this indicate?
>
> thanx for all the help.
>
> regards,
> Shareef
>
>
> On Thu, May 22, 2008 at 2:18 AM, Tony Lindgren <tony@atomide.com> wrote:
>   
>> * Felipe Balbi <me@felipebalbi.com> [080521 12:37]:
>>     
>>> On Wed, 21 May 2008 10:44:28 -0700, Tony Lindgren <tony@atomide.com> wrote:
>>>       
>>>> * mohammed shareef <mdshareef@gmail.com> [080521 10:12]:
>>>>         
>>>>> i see the following lines in the omap-osk.c file regarding the uarts:
>>>>>
>>>>> static struct omap_uart_config osk_uart_config __initdata = {
>>>>>    .enabled_uarts = (1 << 0),
>>>>> };
>>>>>
>>>>>
>>>>> what does it mean? i want all my uarts (1,2,3) enabled. how do i have
>>>>> to modify the above line?
>>>>>           
>>>> How about try .enabled_uarts = 3
>>>>         
>>> this would enable only uarts 1 and 2, right?
>>> maybe it's enough :-p
>>>       
>> Oh yeh, that's true :)
>>
>> Tony
>>
>>     
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