From: Wolfram Sang <wsa@the-dreams.de>
To: Kevin Hilman <khilman@baylibre.com>
Cc: Mark Rutland <mark.rutland@arm.com>,
Rob Herring <robh@kernel.org>,
Hanjie Lin <hanjie.lin@amlogic.com>,
Jianxin Pan <jianxin.pan@amlogic.com>,
Neil Armstrong <narmstrong@baylibre.com>,
Martin Blumenstingl <martin.blumenstingl@googlemail.com>,
Michael Turquette <mturquette@baylibre.com>,
linux-kernel@vger.kernel.org, Stephen Boyd <sboyd@kernel.org>,
devicetree@vger.kernel.org, Jian Hu <jian.hu@amlogic.com>,
linux-i2c@vger.kernel.org, Carlo Caione <carlo@caione.org>,
linux-amlogic@lists.infradead.org,
linux-arm-kernel@lists.infradead.org,
Jerome Brunet <jbrunet@baylibre.com>
Subject: Re: [PATCH 0/2] i2c: meson: add support for Meson G12A SoC i2c controller
Date: Tue, 11 Dec 2018 22:45:27 +0100 [thread overview]
Message-ID: <20181211214527.GA5660@kunai> (raw)
In-Reply-To: <7hsgz3u4fu.fsf@baylibre.com>
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> >> I am okay if it is reasonable below in file
> >> arch/arm64/boot/dts/amlogic/meson-g12a.dtsi. I2c controller node just uses
> >> axg's compatible.
> >>
> >> i2c0: i2c@1f000 {
> >> compatible = "amlogic,meson-axg-i2c";
> >
> > Actually, you should have
> >
> > compatible = "amlogic,meson-g12a-i2c", "amlogic,meson-axg-i2c";
> >
> > in the DT to have support for future SoC specific additions. And then,
> > patch 1 is needed.
> >
> > Or do you handle this differently? I'd think this is DT standard.
>
> It's a DT standard *if* there are actual hardware differences. In this
> case, the IP block is identical, so there are no driver changes.
>
> We prefer to add a new compatible if and when there are actual
> driver/hardware changes.
OK, fine with me. I just hope for you guys that there really is no
change in the IP block, otherwise you need to update DTs later.
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WARNING: multiple messages have this Message-ID (diff)
From: Wolfram Sang <wsa@the-dreams.de>
To: Kevin Hilman <khilman@baylibre.com>
Cc: Jian Hu <jian.hu@amlogic.com>,
Jerome Brunet <jbrunet@baylibre.com>,
Neil Armstrong <narmstrong@baylibre.com>,
Carlo Caione <carlo@caione.org>, Rob Herring <robh@kernel.org>,
Martin Blumenstingl <martin.blumenstingl@googlemail.com>,
Michael Turquette <mturquette@baylibre.com>,
Stephen Boyd <sboyd@kernel.org>,
Mark Rutland <mark.rutland@arm.com>,
Jianxin Pan <jianxin.pan@amlogic.com>,
Hanjie Lin <hanjie.lin@amlogic.com>,
linux-amlogic@lists.infradead.org, linux-i2c@vger.kernel.org,
linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org, devicetree@vger.kernel.org
Subject: Re: [PATCH 0/2] i2c: meson: add support for Meson G12A SoC i2c controller
Date: Tue, 11 Dec 2018 22:45:27 +0100 [thread overview]
Message-ID: <20181211214527.GA5660@kunai> (raw)
In-Reply-To: <7hsgz3u4fu.fsf@baylibre.com>
[-- Attachment #1: Type: text/plain, Size: 913 bytes --]
> >> I am okay if it is reasonable below in file
> >> arch/arm64/boot/dts/amlogic/meson-g12a.dtsi. I2c controller node just uses
> >> axg's compatible.
> >>
> >> i2c0: i2c@1f000 {
> >> compatible = "amlogic,meson-axg-i2c";
> >
> > Actually, you should have
> >
> > compatible = "amlogic,meson-g12a-i2c", "amlogic,meson-axg-i2c";
> >
> > in the DT to have support for future SoC specific additions. And then,
> > patch 1 is needed.
> >
> > Or do you handle this differently? I'd think this is DT standard.
>
> It's a DT standard *if* there are actual hardware differences. In this
> case, the IP block is identical, so there are no driver changes.
>
> We prefer to add a new compatible if and when there are actual
> driver/hardware changes.
OK, fine with me. I just hope for you guys that there really is no
change in the IP block, otherwise you need to update DTs later.
[-- Attachment #2: signature.asc --]
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WARNING: multiple messages have this Message-ID (diff)
From: Wolfram Sang <wsa@the-dreams.de>
To: Kevin Hilman <khilman@baylibre.com>
Cc: Mark Rutland <mark.rutland@arm.com>,
Rob Herring <robh@kernel.org>,
Hanjie Lin <hanjie.lin@amlogic.com>,
Jianxin Pan <jianxin.pan@amlogic.com>,
Neil Armstrong <narmstrong@baylibre.com>,
Martin Blumenstingl <martin.blumenstingl@googlemail.com>,
Michael Turquette <mturquette@baylibre.com>,
linux-kernel@vger.kernel.org, Stephen Boyd <sboyd@kernel.org>,
devicetree@vger.kernel.org, Jian Hu <jian.hu@amlogic.com>,
linux-i2c@vger.kernel.org, Carlo Caione <carlo@caione.org>,
linux-amlogic@lists.infradead.org,
linux-arm-kernel@lists.infradead.org,
Jerome Brunet <jbrunet@baylibre.com>
Subject: Re: [PATCH 0/2] i2c: meson: add support for Meson G12A SoC i2c controller
Date: Tue, 11 Dec 2018 22:45:27 +0100 [thread overview]
Message-ID: <20181211214527.GA5660@kunai> (raw)
In-Reply-To: <7hsgz3u4fu.fsf@baylibre.com>
[-- Attachment #1.1: Type: text/plain, Size: 913 bytes --]
> >> I am okay if it is reasonable below in file
> >> arch/arm64/boot/dts/amlogic/meson-g12a.dtsi. I2c controller node just uses
> >> axg's compatible.
> >>
> >> i2c0: i2c@1f000 {
> >> compatible = "amlogic,meson-axg-i2c";
> >
> > Actually, you should have
> >
> > compatible = "amlogic,meson-g12a-i2c", "amlogic,meson-axg-i2c";
> >
> > in the DT to have support for future SoC specific additions. And then,
> > patch 1 is needed.
> >
> > Or do you handle this differently? I'd think this is DT standard.
>
> It's a DT standard *if* there are actual hardware differences. In this
> case, the IP block is identical, so there are no driver changes.
>
> We prefer to add a new compatible if and when there are actual
> driver/hardware changes.
OK, fine with me. I just hope for you guys that there really is no
change in the IP block, otherwise you need to update DTs later.
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_______________________________________________
linux-arm-kernel mailing list
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http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next prev parent reply other threads:[~2018-12-11 21:46 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-11-29 10:59 [PATCH 0/2] i2c: meson: add support for Meson G12A SoC i2c controller Jian Hu
2018-11-29 10:59 ` Jian Hu
2018-11-29 10:59 ` Jian Hu
2018-11-29 10:59 ` Jian Hu
2018-11-29 10:59 ` [PATCH 1/2] dt-bindings: i2c: meson: add Meson G12A SoC i2c compatible string Jian Hu
2018-11-29 10:59 ` Jian Hu
2018-11-29 10:59 ` Jian Hu
2018-11-29 10:59 ` Jian Hu
2018-11-29 10:59 ` [PATCH 2/2] i2c: meson: add support for Meson G12A SoC I2C controller Jian Hu
2018-11-29 10:59 ` Jian Hu
2018-11-29 10:59 ` Jian Hu
2018-11-29 10:59 ` Jian Hu
2018-11-29 11:26 ` Neil Armstrong
2018-11-29 11:26 ` Neil Armstrong
2018-11-29 12:18 ` Jian Hu
2018-11-29 12:18 ` Jian Hu
2018-11-29 12:18 ` Jian Hu
2018-11-29 11:02 ` [PATCH 0/2] i2c: meson: add support for Meson G12A SoC i2c controller Jerome Brunet
2018-11-29 11:02 ` Jerome Brunet
2018-11-29 11:02 ` Jerome Brunet
2018-11-29 11:55 ` Jian Hu
2018-11-29 11:55 ` Jian Hu
2018-11-29 11:55 ` Jian Hu
2018-12-11 20:36 ` Wolfram Sang
2018-12-11 20:36 ` Wolfram Sang
2018-12-11 20:36 ` Wolfram Sang
2018-12-11 21:41 ` Kevin Hilman
2018-12-11 21:41 ` Kevin Hilman
2018-12-11 21:41 ` Kevin Hilman
2018-12-11 21:45 ` Wolfram Sang [this message]
2018-12-11 21:45 ` Wolfram Sang
2018-12-11 21:45 ` Wolfram Sang
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