[alsa-devel] [PATCH 0/8] da9055: Driver initialisation fixes, add DT support

[Guenter Roeck]

On 02/06/2014 03:46 AM, Opensource [Adam Thomson] wrote:
> On Thu, Feb 06, 2014 at 00:54:11AM +0000, Guenter Roeck wrote:
>
>> Adam,
>>
>> You don't really explain what the problem actually is. Can you elaborate ?
>
> Sorry, yes. For the conflicting device Ids, both the PMIC and the CODEC used
> the same I2C Id string, which meant if you tried to intiate both together on the
> same bus, then the second would fail.
>
> For the removal of platform_get_irq_byname(), the reason for this was that it
> was conflicting with regmap_irq_get_virq() when the IRQ value returned from
> platform_get_irq_byname() was being passed to regmap_irq_get_virq(). The result
> for the code was that it would try to request a threaded IRQ using an invalid
> IRQ number (have also described this further in patch 0004 mail thread,
> https://lkml.org/lkml/2014/2/6/126).
>
>>
>> Also, I have been using platform_get_irq() to get the interrupt resource
>> in mfd client drivers and similar situations. Wouldn't this work here as well
>> if you don't want to use platform_get_irq_byname() ?
>
> What I could've done is use platform_get_irq_byname() and avoided using
> regmap_irq_get_virq() as I would already have the correct VIRQ to pass to
> request_threaded_irq(), but I figured that using regmap_irq_get_virq() made
> more sense at the time, and was unable to use both.
>

I may be missing something, but I think the problem may be that you are
doing two mappings instead of just one. I don't think you need to call
regmap_irq_get_virq() at all.

Guenter