[RFC PATCH 3/3] Enable BCM2835 mailbox support

[Craig McGeachie]

On 10/02/2013 04:15 PM, Stephen Warren wrote:
> On 09/13/2013 05:32 AM, Craig McGeachie wrote:
>> Implement BCM2835 CPU thermal sensor support.
>>
>> Signed-off-by: Craig McGeachie <slapdau at yahoo.com.au>
>> ---
>>
>> Beyond the usual reviews of rubbish code, there are two points
>> here that I'm looking for feedback on.
>>
>> First is the placement of the mailbox directory make target in
>> drivers/Makefile.  I placed it as early as I did in anticipation of
>> implemented a frame buffer driver, which needs mailbox support at
>> probe time. Another option would be to initialise the driver at
>> architecture initialisation time, but I'm unfamiliar with good
>> practice about when to initialise different bits and pieces.
>> Especially with generic mailbox support looking kinda new.
>
> These days, all drivers should support deferred probe, so that if they
> get probe()d and find that resources they need aren't yet available,
> they return -EPROBE_DEFER from probe(), and the driver core will call
> their probe() again later, when hopefully the resources actually will be
> available. Once this works, most drivers will simply use
> module_initcall(). This all avoids having to play games with link order
> or initcall ordering.

Thank you.  That's the information I needed.  I mostly kick started my 
kernel knowledge with LDD3.  It's getting a little old.

Cheers,
Craig.