linux-kernel - Re: About regression caused by commit aea6cb99703e ("regulator: resolve supply after creating regulator")

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Message-ID: <20201108171811.GB10914@qmqm.qmqm.pl>
Date:   Sun, 8 Nov 2020 18:18:11 +0100
From:   Michał Mirosław <mirq-linux@...e.qmqm.pl>
To:     Qu Wenruo <wqu@...e.com>
Cc:     Linux ARM <linux-arm-kernel@...ts.infradead.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        broonie@...nel.org
Subject: Re: About regression caused by commit aea6cb99703e ("regulator:
 resolve supply after creating regulator")

On Sun, Nov 08, 2020 at 03:35:33PM +0800, Qu Wenruo wrote:
> Hi Michał,
> 
> Recently when testing v5.10-rc2, I found my RK3399 boards failed to boot
> from NVME.
> 
> It turns out that, commit aea6cb99703e ("regulator: resolve supply after
> creating regulator") seems to be the cause.
> 
> In RK3399 board, vpcie1v8 and vpcie0v9 of the pcie controller is
> provided by RK808 regulator.
> With that commit, now RK808 regulator fails to register:
> 
> [    1.402500] rk808-regulator rk808-regulator: there is no dvs0 gpio
> [    1.403104] rk808-regulator rk808-regulator: there is no dvs1 gpio
> [    1.419856] rk808 0-001b: failed to register 12 regulator
> [    1.422801] rk808-regulator: probe of rk808-regulator failed with
> error -22

Hi,

This looks lika the problem fixed by commit cf1ad559a20d ("regulator: defer
probe when trying to get voltage from unresolved supply") recently accepted
to regulator tree [1]. Can you verify this?

[1] git.kernel.org/pub/scm/linux/kernel/git/broonie/regulator.git for-next 
 
Best Regards
Michał Mirosław