linux-kernel - Re: [PATCH v2 0/3] Make fw

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Date:   Wed, 3 Feb 2021 23:02:10 +0100
From:   Martin Kaiser <martin@...ser.cx>
To:     Geert Uytterhoeven <geert@...ux-m68k.org>
Cc:     Saravana Kannan <saravanak@...gle.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        "Rafael J. Wysocki" <rafael@...nel.org>,
        Marek Szyprowski <m.szyprowski@...sung.com>,
        Marc Zyngier <maz@...nel.org>,
        Tudor Ambarus <Tudor.Ambarus@...rochip.com>,
        Linus Walleij <linus.walleij@...aro.org>,
        Bartosz Golaszewski <bgolaszewski@...libre.com>,
        Rob Herring <robh+dt@...nel.org>,
        Frank Rowand <frowand.list@...il.com>,
        Len Brown <lenb@...nel.org>,
        LKML <linux-kernel@...r.kernel.org>,
        "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" 
        <devicetree@...r.kernel.org>,
        ACPI Devel Maling List <linux-acpi@...r.kernel.org>,
        Android Kernel Team <kernel-team@...roid.com>
Subject: Re: [PATCH v2 0/3] Make fw_devlink=on more forgiving

Thus wrote Geert Uytterhoeven (geert@...ux-m68k.org):

> > The property you are using is not a standard GPIO binding (-gpios,
> > gpio, gpios) and I'm not surprised it's not working. The gpio1 is
> > probably getting probe deferred and ends up running after "my_driver".

> So my_driver doesn't support deferred probe,

I know that the gpio definition in the device-tree is non-standard (and
should have been done differently).

Apart from this, the driver uses module_platform_driver_probe. My
understanding is that this prevents probe deferral.

Does this mean that from now on, a driver which requests a gpio must not
use module_platform_driver_probe?

Thanks,
Martin