Re: [RFC][PATCH v3 1/3] runtime interpreted power sequences

From: Stephen Warren
Date: Mon Aug 06 2012 - 12:16:37 EST


On 08/05/2012 08:27 PM, Alex Courbot wrote:
> On 08/04/2012 11:12 PM, Mark Brown wrote:
>> On Fri, Aug 03, 2012 at 10:15:46AM +0900, Alex Courbot wrote:
>>> On Fri 03 Aug 2012 03:11:12 AM JST, Mark Brown wrote:
>>
>>>> I missed some of the earlier bits of the thread here but why can't
>>>> we do
>>>> device based lookups?
...
> I think we only have two choices for this:
>
> 1) Stick to the scheme where resources are declared at the device level,
> such as they can be referenced by name in the sub-nodes (basically what
> I did in this patch):
>
> backlight {
> compatible = "pwm-backlight";
> ...
> backlight-supply = <&backlight_reg>;
>
> power-on-sequence {
> step@0 {
> regulator = "backlight";
> enable;
> };
>
> This would translate by a get_regulator(dev, "backlight") in the code
> which would be properly resolved.

Yes, upon reflection, that scheme does make sense. I withdraw the
comments I made re: whether it'd be better to just stick the phandles
into the steps.
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