linux-kernel - Re: [PATCH v5 0/9] Introduce HDP support for STM32MP platforms

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Message-ID: <CAMRc=Me8KZPU_KbbifL-j74GMPSuDgmmacw9g1UEfy=zeGyZcw@mail.gmail.com>
Date: Wed, 18 Jun 2025 14:32:00 +0200
From: Bartosz Golaszewski <brgl@...ev.pl>
To: Linus Walleij <linus.walleij@...aro.org>
Cc: Clément Le Goffic <clement.legoffic@...s.st.com>, 
	Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>, Conor Dooley <conor+dt@...nel.org>, 
	Maxime Coquelin <mcoquelin.stm32@...il.com>, Alexandre Torgue <alexandre.torgue@...s.st.com>, 
	linux-kernel@...r.kernel.org, linux-gpio@...r.kernel.org, 
	devicetree@...r.kernel.org, linux-stm32@...md-mailman.stormreply.com, 
	linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH v5 0/9] Introduce HDP support for STM32MP platforms

On Wed, Jun 18, 2025 at 2:21 PM Linus Walleij <linus.walleij@...aro.org> wrote:
>
> On Mon, Jun 16, 2025 at 10:05 AM Bartosz Golaszewski <brgl@...ev.pl> wrote:
> > On Fri, Jun 13, 2025 at 12:16 PM Clément Le Goffic
> > <clement.legoffic@...s.st.com> wrote:
> > >
> > > This patch series introduces the Hardware Debug Port (HDP) support for
> > > STM32MP platforms.
> > >
> > > It includes updates to the mmio gpio driver, the addition of device tree
> > > bindings, the HDP driver, and updates to the device tree files for
> > > STM32MP13, STM32MP15,
> > > and STM32MP25 SoCs.
> > > The series also updates the MAINTAINERS file to include myself as the
> > > maintainer for the STM32 HDP driver and adds the necessary
> > > pinmux configurations for HDP pins on STM32MP157C-DK2 as example.
> > >
> > > Signed-off-by: Clément Le Goffic <clement.legoffic@...s.st.com>
> > > ---
> >
> > [snip]
> >
> > > ---
> > > Clément Le Goffic (9):
> > >       gpio: mmio: add BGPIOF_NO_INPUT flag for GPO gpiochip
> > >       dt-bindings: pinctrl: stm32: Introduce HDP
> > >       pinctrl: stm32: Introduce HDP driver
> > >       MAINTAINERS: add Clément Le Goffic as STM32 HDP maintainer
> > >       ARM: dts: stm32: add Hardware debug port (HDP) on stm32mp13
> > >       ARM: dts: stm32: add Hardware debug port (HDP) on stm32mp15
> > >       ARM: dts: stm32: add Hardware debug port (HDP) on stm32mp25
> > >       ARM: dts: stm32: add alternate pinmux for HDP pin and add HDP pinctrl node
> > >       ARM: dts: stm32: add Hardware debug port (HDP) on stm32mp157c-dk2 board
> > >
> >
> > Patches 1-4 and 5-9 can go upstream independently. I suggest taking
> > patch 1/9 through the GPIO tree and providing an immutable tag to
> > Linus to take patches 2-4 through the pinctrl tree. Linus: are you OK
> > with that?
>
> Yes go ahead if you want, an immutable branch based on v6.16-rc1
> is the best for me, then I pull that in.
>
> I could also just apply it and hope for the best... it usually works.
>

I have a rework of gpio-mmio in progress that removes the bgpio
specific fields from struct gpio_chip. This includes moving the flags
into a separate gpio/generic.h header. I really need to either apply
it myself or get an immutable tag from you with this change.

Bartosz