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Message-ID: <CAHp75VfPio=TacTTrY=vZp8vZ7qst_7zWeXKDpYvJ6q7oh2Hdw@mail.gmail.com>
Date: Tue, 17 Nov 2020 18:45:37 +0200
From: Andy Shevchenko <andy.shevchenko@...il.com>
To: "Enrico Weigelt, metux IT consult" <info@...ux.net>,
Jonathan Cameron <jic23@...nel.org>
Cc: Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
Linus Walleij <linus.walleij@...aro.org>,
Bartosz Golaszewski <bgolaszewski@...libre.com>,
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Thierry Reding <thierry.reding@...il.com>,
Uwe Kleine-König
<u.kleine-koenig@...gutronix.de>, Lee Jones <lee.jones@...aro.org>,
Shawn Guo <shawnguo@...nel.org>,
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Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>,
Philipp Zabel <p.zabel@...gutronix.de>,
"open list:GPIO SUBSYSTEM" <linux-gpio@...r.kernel.org>,
linux-pwm@...r.kernel.org,
Linux OMAP Mailing List <linux-omap@...r.kernel.org>,
linux-tegra@...r.kernel.org
Subject: Re: [PATCH] drivers: gpio: use of_match_ptr() and ACPI_PTR() macros
On Tue, Nov 17, 2020 at 5:45 PM Enrico Weigelt, metux IT consult
<info@...ux.net> wrote:
>
> The of_match_ptr(foo) macro evaluates to foo, only if
> CONFIG_OF is set, otherwise to NULL. Same does ACPI_PTR with
> CONFIG_ACPI. That's very helpful for drivers that can be used
> with or without oftree / acpi.
>
> Even though most of the drivers touched here probably don't
> actually need that, it's also nice for consistency to make it
> the de-facto standard and change all drivers to use the
> of_match_ptr() and ACPI_PTR() macros.
>
> A nice side effect: in some situations, when compiled w/o
> CONFIG_OF/CONFIG_ACPI, the corresponding match tables could
> automatically become unreferenced and optimized-away by the
> compiler, w/o explicitly cluttering the code w/ ifdef's.
NAK.
It prevents using DT-enabled drivers on ACPI based platforms.
+Cc: Jonathan who had done the opposite in the entire IIO subsystem.
--
With Best Regards,
Andy Shevchenko
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