From: Ahmad Fatoum <a.fatoum@pengutronix.de>
To: Krzysztof Kozlowski <krzk@kernel.org>
Cc: Rob Herring <robh+dt@kernel.org>, Shawn Guo <shawnguo@kernel.org>,
Sascha Hauer <s.hauer@pengutronix.de>,
Pengutronix Kernel Team <kernel@pengutronix.de>,
Fabio Estevam <festevam@gmail.com>,
NXP Linux Team <linux-imx@nxp.com>,
Anson Huang <Anson.Huang@nxp.com>,
Andreas Kemnade <andreas@kemnade.info>,
Stefan Riedmueller <s.riedmueller@phytec.de>,
Robert Jones <rjones@gateworks.com>, Li Yang <leoyang.li@nxp.com>,
devicetree@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH v2 08/12] ARM: dts: imx6dl-pico: fix board compatibles
Date: Fri, 2 Oct 2020 09:41:28 +0200 [thread overview]
Message-ID: <7fcea21d-4651-9ba7-5331-86530296a847@pengutronix.de> (raw)
In-Reply-To: <20201001103704.GA26287@kozik-lap>
Hello,
On 10/1/20 12:37 PM, Krzysztof Kozlowski wrote:
>> The existing binding doesn't cover these boards then and needs to be
>> extended, no? How about following patch?
>
> What do you mean it doesn't cover? It was added exactly to handle them:
> + - technexion,imx6q-pico-dwarf # TechNexion i.MX6Q Pico-Dwarf
> + - technexion,imx6q-pico-hobbit # TechNexion i.MX6Q Pico-Hobbit
> + - technexion,imx6q-pico-nymph # TechNexion i.MX6Q Pico-Nymph
> + - technexion,imx6q-pico-pi # TechNexion i.MX6Q Pico-Pi
>
Still they are unused. So I'd think these boards should be handled like boards
that predated bindings: a binding is written that doesn't break existing users.
>> [I guess we need to keep the two-compatible list they were originally
>> in for compatibility even if it's unused among upstream device trees?]
>
> You want to change both the binding (thus breaking the ABI) and update
> the DTS to reflect new ABI. Then why having a binding at all?
If we leave the old two-compatible enumeration intact, there is no ABI broken.
> I would assume that either binding is correct or DTS. You propose that
> both are wrong and both need changes... in such case this is clearly
> broken.
IMO the DTS is the correct one. If you want to honor the author's intention
that each base board has a different compatible, it should be an extra
compatible and not replace the existing one that may be already in use.
Cheers
Ahmad
>
> Best regards,
> Krzysztof
>
--
Pengutronix e.K. | |
Steuerwalder Str. 21 | http://www.pengutronix.de/ |
31137 Hildesheim, Germany | Phone: +49-5121-206917-0 |
Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 |
WARNING: multiple messages have this Message-ID (diff)
From: Ahmad Fatoum <a.fatoum@pengutronix.de>
To: Krzysztof Kozlowski <krzk@kernel.org>
Cc: devicetree@vger.kernel.org, Robert Jones <rjones@gateworks.com>,
Stefan Riedmueller <s.riedmueller@phytec.de>,
Anson Huang <Anson.Huang@nxp.com>,
Shawn Guo <shawnguo@kernel.org>,
Sascha Hauer <s.hauer@pengutronix.de>,
linux-kernel@vger.kernel.org, Li Yang <leoyang.li@nxp.com>,
Rob Herring <robh+dt@kernel.org>,
NXP Linux Team <linux-imx@nxp.com>,
Pengutronix Kernel Team <kernel@pengutronix.de>,
Andreas Kemnade <andreas@kemnade.info>,
Fabio Estevam <festevam@gmail.com>,
linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH v2 08/12] ARM: dts: imx6dl-pico: fix board compatibles
Date: Fri, 2 Oct 2020 09:41:28 +0200 [thread overview]
Message-ID: <7fcea21d-4651-9ba7-5331-86530296a847@pengutronix.de> (raw)
In-Reply-To: <20201001103704.GA26287@kozik-lap>
Hello,
On 10/1/20 12:37 PM, Krzysztof Kozlowski wrote:
>> The existing binding doesn't cover these boards then and needs to be
>> extended, no? How about following patch?
>
> What do you mean it doesn't cover? It was added exactly to handle them:
> + - technexion,imx6q-pico-dwarf # TechNexion i.MX6Q Pico-Dwarf
> + - technexion,imx6q-pico-hobbit # TechNexion i.MX6Q Pico-Hobbit
> + - technexion,imx6q-pico-nymph # TechNexion i.MX6Q Pico-Nymph
> + - technexion,imx6q-pico-pi # TechNexion i.MX6Q Pico-Pi
>
Still they are unused. So I'd think these boards should be handled like boards
that predated bindings: a binding is written that doesn't break existing users.
>> [I guess we need to keep the two-compatible list they were originally
>> in for compatibility even if it's unused among upstream device trees?]
>
> You want to change both the binding (thus breaking the ABI) and update
> the DTS to reflect new ABI. Then why having a binding at all?
If we leave the old two-compatible enumeration intact, there is no ABI broken.
> I would assume that either binding is correct or DTS. You propose that
> both are wrong and both need changes... in such case this is clearly
> broken.
IMO the DTS is the correct one. If you want to honor the author's intention
that each base board has a different compatible, it should be an extra
compatible and not replace the existing one that may be already in use.
Cheers
Ahmad
>
> Best regards,
> Krzysztof
>
--
Pengutronix e.K. | |
Steuerwalder Str. 21 | http://www.pengutronix.de/ |
31137 Hildesheim, Germany | Phone: +49-5121-206917-0 |
Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 |
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next prev parent reply other threads:[~2020-10-02 7:41 UTC|newest]
Thread overview: 64+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-09-30 19:01 [PATCH v2 00/12] ARM: dts: imx: Board compatibles cleanup Krzysztof Kozlowski
2020-09-30 19:01 ` Krzysztof Kozlowski
2020-09-30 19:01 ` [PATCH v2 01/12] dt-bindings: vendor-prefixes: add MicroSys Krzysztof Kozlowski
2020-09-30 19:01 ` Krzysztof Kozlowski
2020-10-06 17:36 ` Rob Herring
2020-10-06 17:36 ` Rob Herring
2020-09-30 19:01 ` [PATCH v2 02/12] dt-bindings: vendor-prefixes: add Revotics Krzysztof Kozlowski
2020-09-30 19:01 ` Krzysztof Kozlowski
2020-10-06 17:36 ` Rob Herring
2020-10-06 17:36 ` Rob Herring
2020-09-30 19:01 ` [PATCH v2 03/12] dt-bindings: arm: fsl: document i.MX25 and i.MX27 boards Krzysztof Kozlowski
2020-09-30 19:01 ` Krzysztof Kozlowski
2020-09-30 19:01 ` [PATCH v2 04/12] dt-bindings: arm: fsl: document i.MX51 boards Krzysztof Kozlowski
2020-09-30 19:01 ` Krzysztof Kozlowski
2020-09-30 19:01 ` [PATCH v2 05/12] dt-bindings: arm: fsl: document i.MX53 boards Krzysztof Kozlowski
2020-09-30 19:01 ` Krzysztof Kozlowski
2020-09-30 19:01 ` [PATCH v2 06/12] dt-bindings: arm: fsl: document VF boards Krzysztof Kozlowski
2020-09-30 19:01 ` Krzysztof Kozlowski
2020-09-30 19:01 ` [PATCH v2 07/12] dt-bindings: arm: fsl: document i.MX6DL boards Krzysztof Kozlowski
2020-09-30 19:01 ` Krzysztof Kozlowski
2020-09-30 19:01 ` [PATCH v2 08/12] ARM: dts: imx6dl-pico: fix board compatibles Krzysztof Kozlowski
2020-09-30 19:01 ` Krzysztof Kozlowski
2020-10-01 7:22 ` Ahmad Fatoum
2020-10-01 7:22 ` Ahmad Fatoum
2020-10-01 7:32 ` Krzysztof Kozlowski
2020-10-01 7:32 ` Krzysztof Kozlowski
2020-10-01 10:19 ` Ahmad Fatoum
2020-10-01 10:19 ` Ahmad Fatoum
2020-10-01 10:37 ` Krzysztof Kozlowski
2020-10-01 10:37 ` Krzysztof Kozlowski
2020-10-02 7:41 ` Ahmad Fatoum [this message]
2020-10-02 7:41 ` Ahmad Fatoum
2020-10-02 8:20 ` Krzysztof Kozlowski
2020-10-02 8:20 ` Krzysztof Kozlowski
2020-10-02 8:34 ` Ahmad Fatoum
2020-10-02 8:34 ` Ahmad Fatoum
2020-10-02 8:41 ` Marco Felsch
2020-10-02 8:41 ` Marco Felsch
2020-10-02 10:36 ` Krzysztof Kozlowski
2020-10-02 10:36 ` Krzysztof Kozlowski
2020-10-05 11:39 ` Fabio Estevam
2020-10-05 11:39 ` Fabio Estevam
2020-09-30 19:01 ` [PATCH v2 09/12] dt-bindings: vendor-prefixes: add ABB Krzysztof Kozlowski
2020-09-30 19:01 ` Krzysztof Kozlowski
2020-10-01 3:49 ` Heiko Schocher
2020-10-01 3:49 ` Heiko Schocher
2020-10-06 17:38 ` Rob Herring
2020-10-06 17:38 ` Rob Herring
2020-09-30 19:01 ` [PATCH v2 10/12] dt-bindings: arm: fsl: document i.MX6DL Aristainetos boards Krzysztof Kozlowski
2020-09-30 19:01 ` Krzysztof Kozlowski
2020-10-01 3:50 ` Heiko Schocher
2020-10-01 3:50 ` Heiko Schocher
2020-10-06 17:38 ` Rob Herring
2020-10-06 17:38 ` Rob Herring
2020-09-30 19:01 ` [PATCH v2 11/12] ARM: dts: imx6dl: add compatibles for " Krzysztof Kozlowski
2020-09-30 19:01 ` Krzysztof Kozlowski
2020-10-01 3:51 ` Heiko Schocher
2020-10-01 3:51 ` Heiko Schocher
2020-09-30 19:01 ` [PATCH v2 12/12] dt-bindings: arm: fsl: document i.MX6Q boards Krzysztof Kozlowski
2020-09-30 19:01 ` Krzysztof Kozlowski
2020-09-30 19:04 ` Krzysztof Kozlowski
2020-09-30 19:04 ` Krzysztof Kozlowski
2020-10-30 6:51 ` [PATCH v2 00/12] ARM: dts: imx: Board compatibles cleanup Shawn Guo
2020-10-30 6:51 ` Shawn Guo
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