linux-kernel - Aw: Re: BUG: devm_regulator_get returns EPROBE_DEFER (5.3-rc5..next-20190822) for bpi-r2/mt7623/mt7530

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Date:   Thu, 22 Aug 2019 22:28:44 +0200
From:   "Frank Wunderlich" <frank-w@...lic-files.de>
To:     "Mark Brown" <broonie@...nel.org>
Cc:     "Liam Girdwood" <lgirdwood@...il.com>,
        linux-kernel@...r.kernel.org, linux-mediatek@...ts.infradead.org,
        "René van Dorst" <opensource@...rst.com>
Subject: Aw: Re: BUG: devm_regulator_get returns EPROBE_DEFER
 (5.3-rc5..next-20190822) for bpi-r2/mt7623/mt7530

cfba5de9b99f drivers: Introduce device lookup variants by of_node

this looks suspicios to me since the change is in the function which fails:

struct regulator_dev *of_find_regulator_by_node(struct device_node *np)
 {
        struct device *dev;
 
-       dev = class_find_device(&regulator_class, NULL, np, of_node_match);
+       dev = class_find_device_by_of_node(&regulator_class, np);


but i cannot revert this commit so i did it manually...but this does not seem to be the cause...still error 517, also a change in core.c is not the cause...

how can i check instantiation at runtime?

regards Frank


> Gesendet: Donnerstag, 22. August 2019 um 21:30 Uhr
> Von: "Mark Brown" <broonie@...nel.org>
> An: "Frank Wunderlich" <frank-w@...lic-files.de>
> Cc: "Liam Girdwood" <lgirdwood@...il.com>, linux-kernel@...r.kernel.org, linux-mediatek@...ts.infradead.org, "René van Dorst" <opensource@...rst.com>
> Betreff: Re: BUG: devm_regulator_get returns EPROBE_DEFER (5.3-rc5..next-20190822) for bpi-r2/mt7623/mt7530
>
> On Thu, Aug 22, 2019 at 09:23:57PM +0200, Frank Wunderlich wrote:
> 
> > seems of_find_regulator_by_node(node); is failing here, but i see the dts-node (mt6323_vpa_reg: buck_vpa) in /sys/firmware/devicetree/...
> 
> It's not looking for the node in the device tree, it's looking
> for that regulator to instantiate at runtime.  Is that happening?
>