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From: Alexander Aring <alex.aring@gmail.com>
To: Peter Mamonov <pmamonov@gmail.com>
Cc: barebox <barebox@lists.infradead.org>
Subject: Re: [RFC] device probe order
Date: Wed, 23 Dec 2015 17:35:51 +0100	[thread overview]
Message-ID: <20151223163532.GA1068@omega> (raw)
In-Reply-To: <20151223191058.4ffb07f4@berta>

On Wed, Dec 23, 2015 at 07:10:58PM +0300, Peter Mamonov wrote:
> Dear All,
> 
> I've ported an UHCI driver from the u-boot to the barebox (WIP). To
> interoperate with the EHCI driver, the UHCI driver should be probed
> ater the EHCI driver. Both drivers are binded via the device tree
> mechanism. How can i achieve the correct probe order?
> 

Normally this should done by returning "-EPROBE_DEFER" inside the probe
function. There was some RFC last years for supporting EPROBE_DEFER [0]
and it seems these are mainline.

However you need some bool which indicates that the EHCI driver is probed.

int uhci_probe(foobar) {

if (!indicate_ehci_is_probed(foobar)
	return -EPROBE_DEFER;
}

- Alex

[0] http://barebox.infradead.narkive.com/ZWIXXU0R/patch-v2-0-6-introduce-deferred-probing

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  reply	other threads:[~2015-12-23 16:36 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-12-23 16:10 Peter Mamonov
2015-12-23 16:35 ` Alexander Aring [this message]
2015-12-23 16:56   ` Peter Mamonov
2015-12-23 17:04     ` Alexander Aring
2015-12-24  9:48       ` Peter Mamonov
2015-12-24 13:42         ` Peter Mamonov
2016-01-04  8:56           ` Sascha Hauer
2015-12-23 19:46 ` Sascha Hauer
2015-12-24 10:46   ` Peter Mamonov
2015-12-24 14:35     ` Alexander Aring
2015-12-24 16:10       ` Peter Mamonov
2015-12-25 10:21         ` Alexander Aring

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