On 3 September 2015 at 15:35, Geert Uytterhoeven <geert@xxxxxxxxxxxxxx> wrote:
> Hi Ulf,
>
> On Thu, Sep 3, 2015 at 2:53 PM, Ulf Hansson <ulf.hansson@xxxxxxxxxx> wrote:
>> On 17 June 2015 at 10:38, Geert Uytterhoeven <geert+renesas@xxxxxxxxx> wrote:
>>> Add support for easy registering of one ore more platform devices that
>>> may:
>>> - need clocks that are described in DT,
>>> - be part of a PM Domain.
>
>>> diff --git a/drivers/staging/board/board.c b/drivers/staging/board/board.c
>>> index 8712f566b31196e0..29d456e29f38feac 100644
>>> --- a/drivers/staging/board/board.c
>>> +++ b/drivers/staging/board/board.c
>
>>> +int __init board_staging_register_device(const struct board_staging_dev *dev)
>>> +{
>>> + struct platform_device *pdev = dev->pdev;
>>> + unsigned int i;
>>> + int error;
>>> +
>>> + pr_debug("Trying to register device %s\n", pdev->name);
>>> + if (board_staging_dt_node_available(pdev->resource,
>>> + pdev->num_resources)) {
>>> + pr_warn("Skipping %s, already in DT\n", pdev->name);
>>> + return -EEXIST;
>>> + }
>>> +
>>> + board_staging_gic_fixup_resources(pdev->resource, pdev->num_resources);
>>> +
>>> + for (i = 0; i < dev->nclocks; i++)
>>> + board_staging_register_clock(&dev->clocks[i]);
>>> +
>>> + error = platform_device_register(pdev);
>>> + if (error) {
>>> + pr_err("Failed to register device %s (%d)\n", pdev->name,
>>> + error);
>>> + return error;
>>> + }
>>> +
>>> + if (dev->domain)
>>> + __pm_genpd_name_add_device(dev->domain, &pdev->dev, NULL);
>>
>> Urgh, this managed to slip through my filters.
>>
>> It seems like we almost managed to remove all users of the
>> "..._name_add..." APIs for genpd. If hasn't been for $subject patch.
>> :-)
>>
>> Now, I realize this is already too late here, but let's try to fix
>> this before it turns into a bigger issue.
>>
>> Geert, do you think it's possible to convert into using the non-named
>> bases APIs?
>
> That will be difficult. This code is meant to use drivers that are not yet
> DT-aware on DT-based systems. Hence it uses platform devices with named PM
> domains, while the PM domains are described in DT.
> I don't think there's another way to look up a PM domain by name, is there?
As a matter of fact there are, especially for those genpds that has
been created through DT as in this case. The API to use is
of_genpd_get_from_provider() to find the struct generic_pm_domain.
Yes, I do realize that you need to manage the parsing of the domain
name to make sure it's the one you want, but I would rather keep that
"hack" in this driver than in the generic API.
>
> This code is meant to go away, once all drivers are converted to DT, or
> considered obsolete.
Well, who knows *when* that is going to happen. :-)
Kind regards
Uffe
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