linux-kernel - Re: [PATCH] gpiolib: of: Use correct fwnode for DT-probed chips

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Message-ID: <Y3Kv7XoBytwwy9pC@x1>
Date:   Mon, 14 Nov 2022 16:15:25 -0500
From:   Brian Masney <bmasney@...hat.com>
To:     Thierry Reding <thierry.reding@...il.com>
Cc:     Bartosz Golaszewski <brgl@...ev.pl>,
        Linus Walleij <linus.walleij@...aro.org>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Dmitry Torokhov <dmitry.torokhov@...il.com>,
        linux-gpio@...r.kernel.org, linux-kernel@...r.kernel.org,
        Marek Szyprowski <m.szyprowski@...sung.com>
Subject: Re: [PATCH] gpiolib: of: Use correct fwnode for DT-probed chips

On Fri, Nov 11, 2022 at 12:37:32PM +0100, Thierry Reding wrote:
> From: Thierry Reding <treding@...dia.com>
> 
> The OF node store in chip->fwnode is used to explicitly override the FW
> node for a GPIO chip. For chips that use the default FW node (i.e. that
> of their parent device), this will be NULL and cause the chip not to be
> fully registered.
> 
> Instead, use the GPIO device's FW node, which is set to either the node
> of the parent device or the explicit override in chip->fwnode.
> 
> Fixes: 8afe82550240 ("gpiolib: of: Prepare of_gpiochip_add() / of_gpiochip_remove() for fwnode")
> Tested-by: Marek Szyprowski <m.szyprowski@...sung.com>
> Signed-off-by: Thierry Reding <treding@...dia.com>

Reviewed-by: Brian Masney <bmasney@...hat.com>
Tested-by: Brian Masney <bmasney@...hat.com>

I separately sent a similar type of patch to fix the same issue today:
https://lore.kernel.org/linux-arm-msm/20221114202943.2389489-1-bmasney@redhat.com/T/#u

I'm still not sure what caused this breakage in linux-next.

Brian