Re: Unhandled LM90 irq 308 on Dalmore?

[Wei Ni <wni-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org>]

On 12/20/2013 06:36 AM, Paul Walmsley wrote:
> Hi Jean,
> 
> On Thu, 19 Dec 2013, Jean Delvare wrote:
> 
>> Adding Wei who added interrupt support to the lm90 driver, and moving
>> to the appropriate list.
> 
> Thanks for the speedy response and list correction.
> 
>> On Thu, 19 Dec 2013 02:08:45 -0800, Paul Walmsley wrote:
>>> Just FYI, the Tegra114 Dalmore board here reports an unhandled IRQ about
>>> two minutes after boot:
>>>
>>> [  120.950839] irq 308: nobody cared (try booting with the "irqpoll" option)
> 
> ...
> 
>>> [  121.019825] handlers:
>>> [  121.022117] [<c0064408>] irq_default_primary_handler threaded
>>> [<c0384764>] lm90_irq_thread
>>> [  121.030418] Disabling IRQ #308
>>>
>>> This is on next-20131218.
>>
>> Which temperature chip is the Tegra114 Dalmore board using?
> 
> It's an NCT72.
> 
>> Is the interrupt shared with something else?
> 
> Doesn't look like it.  From /proc/interrupts:
> 
> 308:      74181          0          0          0      GPIO 116  lm90

Hi, Paul
When I developed it, my Dalmore board used GPIO 116 (GPIO_PO4) as
interrupt line, but according to our downsttream kernel, there also have
other Dalmore board used GPIO 190 (GPIO_PX6). So I think your
problems was caused by it. Please try to change the interrupt line in
dts file.

Thanks.
Wei.

> 
> That's from shortly after boot.  From successive 'cat's of 
> /proc/interrupts, I see that the interrupt count is increasing very 
> quickly.  So something is definitely not right.
> 
>> Is there any monitoring script, application or daemon polling for
>> temperatures on this system?
> 
> This is a totally quiet system, booted with 'init=/bin/bash' on the kernel 
> command line - nothing else running at all.
> 
> regards
> 
> - Paul
>