linux-kernel - Re: [PATCH 3/3] gpio: realtek-otto: use of instead of device handlers

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Message-ID: <CAKxU2N-vr=GjkkXLo_f2M9MAf2GEmKjK8J_pDwsY7jd26p-AYQ@mail.gmail.com>
Date: Thu, 18 Dec 2025 01:32:39 -0800
From: Rosen Penev <rosenp@...il.com>
To: Bartosz Golaszewski <brgl@...nel.org>
Cc: linux-gpio@...r.kernel.org, Linus Walleij <linusw@...nel.org>, 
	open list <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 3/3] gpio: realtek-otto: use of instead of device handlers

On Thu, Dec 18, 2025 at 12:31 AM Bartosz Golaszewski <brgl@...nel.org> wrote:
>
> On Wed, Dec 17, 2025 at 9:26 PM Rosen Penev <rosenp@...il.com> wrote:
> > >
> > > Yeah, no, there's almost *never* a point in using OF-specific accessors. NAK.
> >
> > Argument made to me on netdev before is it's pointless overhead for an
> > OF only driver.
>
> Would you mind posting a lore link? I'll gladly chime in.
>
> Drivers are OF-only until they aren't. Vide: lots of discussions
> currently about supporting ARM laptops and servers with mixed DT-ACPI
> setup.
Hrm I must have misremembered or I can't find it. In any case, these
devices will never support ACPI. They're all embedded devices with
uboot.
>
> The overhead of going through the fwnode pointer is absolutely
> negligible while using generic accessors allows taking secondary
> fwnodes into account.
>
> Please don't tell me people are going around the kernel converting
> drivers to using of_ routines?
There's one special case I know of, of_get_mac_address vs
device_get_mac_address. The former supports NVMEM. The latter does
not.
>
> Bart