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Message-ID: <581A52C1.1010907@linaro.org>
Date: Thu, 03 Nov 2016 04:55:29 +0800
From: Hanjun Guo <hanjun.guo@linaro.org>
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To: Lukas Wunner <lukas@wunner.de>, Hanjun Guo <guohanjun@huawei.com>
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        Kevin Hilman <khilman@kernel.org>,
        Ulf Hansson <ulf.hansson@linaro.org>,
        "Luis R. Rodriguez" <mcgrof@suse.com>
Subject: Re: [PATCH v5 0/5] Functional dependencies between devices
References: <27296716.H9VWo8ShOm@vostro.rjw.lan> <13957403.ZrB4mMbICz@vostro.rjw.lan> <5811F0CF.5000204@huawei.com> <20161028093959.GA7889@wunner.de>
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On 10/28/2016 05:39 PM, Lukas Wunner wrote:
> On Thu, Oct 27, 2016 at 08:19:27PM +0800, Hanjun Guo wrote:
>> I'm trying to using this patch set to solve the functional dependency
>> between devices and irqchip, which are both ACPI platform devices.
>> irqchip needs to be probed before the devices connecting to them,
>> which specifically, it's the mbi-gen support I send out recently:
>>
>> https://lkml.org/lkml/2016/10/25/453
>>
>> But I didn't see an example to do so in this patch set, and seems that
>> some extra code needs to be added for that purpose, could you give me
>> some suggestions for how to do that then I can work on and test against
>> your patch set?
>
> If the consumers can detect that there's a consumer on which they depend,
> you could call device_link_add() from their ->probe hook.
>
> Generally the earliest point in time when device links can be added is
> after device_initialize() has been called for the consumer and device_add()
> has been called for the supplier.  (At least that's my understanding.)

Thank you, currently I'm on travailing and will take a deep look to
see if it works (or adding things on top) on my case.

Thanks
Hanjun