From: Arnd Bergmann <arnd@arndb.de>
To: Maxime Ripard <maxime.ripard@free-electrons.com>
Cc: Mark Rutland <mark.rutland@arm.com>,
Rob Herring <rob.herring@linaro.org>,
Vishnu Patekar <vishnupatekar0510@gmail.com>,
Jean-Francois Moine <moinejf@free.fr>,
Andre Przywara <andre.przywara@arm.com>,
Mike Turquette <mturquette@baylibre.com>,
Stephen Boyd <sboyd@codeaurora.org>,
Hans de Goede <hdegoede@redhat.com>, Chen-Yu Tsai <wens@csie.org>,
Jens Kuske <jenskuske@gmail.com>,
Grant Likely <grant.likely@linaro.org>,
Frank Rowand <frowand.list@gmail.com>,
linux-clk@vger.kernel.org,
"devicetree@vger.kernel.org" <devicetree@vger.kernel.org>,
linux-arm-kernel <linux-arm-kernel@lists.infradead.org>
Subject: Re: breaking DT compatibility (was: Re: [PATCH v4] clk: sunxi: Refactor A31 PLL6 so that it can be reused)
Date: Wed, 10 Feb 2016 15:45:01 +0100 [thread overview]
Message-ID: <3703606.9ibfaTDDFx@wuerfel> (raw)
In-Reply-To: <20160210143755.GE31506@lukather>
On Wednesday 10 February 2016 15:37:55 Maxime Ripard wrote:
> Hi Rob,
>
> On Wed, Feb 10, 2016 at 07:42:02AM -0600, Rob Herring wrote:
> > On Wed, Feb 10, 2016 at 6:30 AM, Andre Przywara <andre.przywara@arm.com> wrote:
> > > Hi,
> > >
> > > just a ping:
> > >
> > > Are we really OK with breaking existing DTs in 4.6? (per the code in
> > > -next: f7d372ba54ea04d528a291b8dbe34716507bb60b, which is this patch).
> >
> > I only warn and make sure people are aware of the issue. I leave that
> > up to platform maintainers to decide. It depends on the maturity of
> > the platform and users.
>
> The impacted SoCs support is really partial. For the most supported
> one, big things like display or sound are totally missing, and we
> still update them on a regular basis to add support for new
> devices. As such, users are very likely to upgrade the DT from one
> version to another just because there's new devices available to
> them. And the newest SoC impacted just got introduced in 4.5, and only
> has the UART and MMC devices available.
>
>
I think the main problems we had were around people building their
own boards and maintaining out-of-tree dts files.
Arnd
WARNING: multiple messages have this Message-ID (diff)
From: Arnd Bergmann <arnd@arndb.de>
To: Maxime Ripard <maxime.ripard@free-electrons.com>
Cc: Rob Herring <rob.herring@linaro.org>,
Andre Przywara <andre.przywara@arm.com>,
Mark Rutland <mark.rutland@arm.com>,
Grant Likely <grant.likely@linaro.org>,
Frank Rowand <frowand.list@gmail.com>,
Chen-Yu Tsai <wens@csie.org>,
Jean-Francois Moine <moinejf@free.fr>,
Vishnu Patekar <vishnupatekar0510@gmail.com>,
Mike Turquette <mturquette@baylibre.com>,
Stephen Boyd <sboyd@codeaurora.org>,
Hans de Goede <hdegoede@redhat.com>,
"devicetree@vger.kernel.org" <devicetree@vger.kernel.org>,
Jens Kuske <jenskuske@gmail.com>,
linux-clk@vger.kernel.org,
linux-arm-kernel <linux-arm-kernel@lists.infradead.org>
Subject: Re: breaking DT compatibility (was: Re: [PATCH v4] clk: sunxi: Refactor A31 PLL6 so that it can be reused)
Date: Wed, 10 Feb 2016 15:45:01 +0100 [thread overview]
Message-ID: <3703606.9ibfaTDDFx@wuerfel> (raw)
In-Reply-To: <20160210143755.GE31506@lukather>
On Wednesday 10 February 2016 15:37:55 Maxime Ripard wrote:
> Hi Rob,
>
> On Wed, Feb 10, 2016 at 07:42:02AM -0600, Rob Herring wrote:
> > On Wed, Feb 10, 2016 at 6:30 AM, Andre Przywara <andre.przywara@arm.com> wrote:
> > > Hi,
> > >
> > > just a ping:
> > >
> > > Are we really OK with breaking existing DTs in 4.6? (per the code in
> > > -next: f7d372ba54ea04d528a291b8dbe34716507bb60b, which is this patch).
> >
> > I only warn and make sure people are aware of the issue. I leave that
> > up to platform maintainers to decide. It depends on the maturity of
> > the platform and users.
>
> The impacted SoCs support is really partial. For the most supported
> one, big things like display or sound are totally missing, and we
> still update them on a regular basis to add support for new
> devices. As such, users are very likely to upgrade the DT from one
> version to another just because there's new devices available to
> them. And the newest SoC impacted just got introduced in 4.5, and only
> has the UART and MMC devices available.
>
>
I think the main problems we had were around people building their
own boards and maintaining out-of-tree dts files.
Arnd
WARNING: multiple messages have this Message-ID (diff)
From: arnd@arndb.de (Arnd Bergmann)
To: linux-arm-kernel@lists.infradead.org
Subject: breaking DT compatibility (was: Re: [PATCH v4] clk: sunxi: Refactor A31 PLL6 so that it can be reused)
Date: Wed, 10 Feb 2016 15:45:01 +0100 [thread overview]
Message-ID: <3703606.9ibfaTDDFx@wuerfel> (raw)
In-Reply-To: <20160210143755.GE31506@lukather>
On Wednesday 10 February 2016 15:37:55 Maxime Ripard wrote:
> Hi Rob,
>
> On Wed, Feb 10, 2016 at 07:42:02AM -0600, Rob Herring wrote:
> > On Wed, Feb 10, 2016 at 6:30 AM, Andre Przywara <andre.przywara@arm.com> wrote:
> > > Hi,
> > >
> > > just a ping:
> > >
> > > Are we really OK with breaking existing DTs in 4.6? (per the code in
> > > -next: f7d372ba54ea04d528a291b8dbe34716507bb60b, which is this patch).
> >
> > I only warn and make sure people are aware of the issue. I leave that
> > up to platform maintainers to decide. It depends on the maturity of
> > the platform and users.
>
> The impacted SoCs support is really partial. For the most supported
> one, big things like display or sound are totally missing, and we
> still update them on a regular basis to add support for new
> devices. As such, users are very likely to upgrade the DT from one
> version to another just because there's new devices available to
> them. And the newest SoC impacted just got introduced in 4.5, and only
> has the UART and MMC devices available.
>
>
I think the main problems we had were around people building their
own boards and maintaining out-of-tree dts files.
Arnd
next prev parent reply other threads:[~2016-02-10 14:45 UTC|newest]
Thread overview: 61+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-02-01 20:20 [PATCH v4] clk: sunxi: Refactor A31 PLL6 so that it can be reused Maxime Ripard
2016-02-01 20:20 ` Maxime Ripard
2016-02-04 12:05 ` Maxime Ripard
2016-02-04 12:05 ` Maxime Ripard
2016-02-04 15:25 ` Jean-Francois Moine
2016-02-04 15:25 ` Jean-Francois Moine
2016-02-10 12:53 ` Maxime Ripard
2016-02-10 12:53 ` Maxime Ripard
2016-02-10 17:04 ` Jean-Francois Moine
2016-02-10 17:04 ` Jean-Francois Moine
2016-02-11 9:53 ` Maxime Ripard
2016-02-11 9:53 ` Maxime Ripard
2016-02-05 17:59 ` Andre Przywara
2016-02-05 17:59 ` Andre Przywara
2016-02-10 12:30 ` breaking DT compatibility (was: Re: [PATCH v4] clk: sunxi: Refactor A31 PLL6 so that it can be reused) Andre Przywara
2016-02-10 12:30 ` Andre Przywara
2016-02-10 13:42 ` Rob Herring
2016-02-10 13:42 ` Rob Herring
2016-02-10 14:37 ` Maxime Ripard
2016-02-10 14:37 ` Maxime Ripard
2016-02-10 14:45 ` Arnd Bergmann [this message]
2016-02-10 14:45 ` Arnd Bergmann
2016-02-10 14:45 ` Arnd Bergmann
2016-02-10 16:14 ` breaking DT compatibility Andre Przywara
2016-02-10 16:14 ` Andre Przywara
2016-02-11 10:16 ` Maxime Ripard
2016-02-11 10:16 ` Maxime Ripard
2016-02-10 16:30 ` breaking DT compatibility (was: Re: [PATCH v4] clk: sunxi: Refactor A31 PLL6 so that it can be reused) Mark Rutland
2016-02-10 16:30 ` Mark Rutland
2016-02-11 10:00 ` Maxime Ripard
2016-02-11 10:00 ` Maxime Ripard
2016-02-11 11:44 ` Mark Rutland
2016-02-11 11:44 ` Mark Rutland
2016-02-11 12:29 ` breaking DT compatibility Andre Przywara
2016-02-11 12:29 ` Andre Przywara
2016-02-11 17:08 ` breaking DT compatibility (was: Re: [PATCH v4] clk: sunxi: Refactor A31 PLL6 so that it can be reused) Maxime Ripard
2016-02-11 17:08 ` Maxime Ripard
2016-02-12 9:40 ` Lucas Stach
2016-02-12 9:40 ` Lucas Stach
2016-02-12 9:40 ` Lucas Stach
2016-02-16 8:44 ` Maxime Ripard
2016-02-16 8:44 ` Maxime Ripard
2016-02-16 19:40 ` Michael Turquette
2016-02-16 19:40 ` Michael Turquette
2016-02-16 19:40 ` Michael Turquette
2016-02-16 21:11 ` Rob Herring
2016-02-11 14:51 ` Richard Cochran
2016-02-11 14:51 ` Richard Cochran
2016-02-11 15:16 ` breaking DT compatibility Andre Przywara
2016-02-11 15:16 ` Andre Przywara
2016-02-11 21:46 ` breaking DT compatibility (was: Re: [PATCH v4] clk: sunxi: Refactor A31 PLL6 so that it can be reused) Rob Herring
2016-02-11 21:46 ` Rob Herring
2016-02-11 21:46 ` Rob Herring
2016-02-10 12:59 ` [PATCH v4] clk: sunxi: Refactor A31 PLL6 so that it can be reused Maxime Ripard
2016-02-10 12:59 ` Maxime Ripard
2016-02-10 14:02 ` Rob Herring
2016-02-10 14:02 ` Rob Herring
2016-02-11 9:41 ` Maxime Ripard
2016-02-11 9:41 ` Maxime Ripard
2016-02-10 18:41 ` Mark Rutland
2016-02-10 18:41 ` Mark Rutland
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