From: Gregory CLEMENT <gregory.clement@free-electrons.com>
To: Chen-Yu Tsai <wens@csie.org>
Cc: Maxime Ripard <maxime.ripard@free-electrons.com>,
Rob Herring <robh+dt@kernel.org>, Pawel Moll <pawel.moll@arm.com>,
Mark Rutland <mark.rutland@arm.com>,
Ian Campbell <ijc+devicetree@hellion.org.uk>,
Kumar Gala <galak@codeaurora.org>,
linux-arm-kernel <linux-arm-kernel@lists.infradead.org>,
devicetree <devicetree@vger.kernel.org>,
linux-kernel <linux-kernel@vger.kernel.org>,
Shuge <shuge@allwinnertech.com>,
Meng Zhang <kevin@allwinnertech.com>, yhf <yhf@merrii.com>,
ctl <ctl@merrii.com>, linux-sunxi <linux-sunxi@googlegroups.com>
Subject: Re: [linux-sunxi] Re: [PATCH 3/6] ARM: dts: sunxi: Add Allwinner A80 dtsi
Date: Wed, 24 Sep 2014 14:36:12 +0200 [thread overview]
Message-ID: <5422BABC.7020906@free-electrons.com> (raw)
In-Reply-To: <CAGb2v64yGmdLeWmA=+nxD85DbQf_xxUNx3n3oedFZi51uc50+w@mail.gmail.com>
Hi Chen-Yu,
>
> Thanks for the tip. Before I send v2, I do have a question. I'm using
>
> ranges = <0 0 0 0x20000000>;
>
> in the clocks and soc node to avoid having to use 64bit values for all
> addresses and sizes. Would this be undesirable, even bad practice maybe?
We did something like that for all the internal registers too as they are all
under 4GB. In our case the use of a range really makes sens because the hardware
addresses were configurable. You don't have such requirement so I can't say if
it is a bad practice. From my point of view it seems sensible but I am not an
DT expert.
Grégory
--
Gregory Clement, Free Electrons
Kernel, drivers, real-time and embedded Linux
development, consulting, training and support.
http://free-electrons.com
WARNING: multiple messages have this Message-ID (diff)
From: Gregory CLEMENT <gregory.clement-wi1+55ScJUtKEb57/3fJTNBPR1lH4CV8@public.gmane.org>
To: Chen-Yu Tsai <wens-jdAy2FN1RRM@public.gmane.org>
Cc: Maxime Ripard
<maxime.ripard-wi1+55ScJUtKEb57/3fJTNBPR1lH4CV8@public.gmane.org>,
Rob Herring <robh+dt-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>,
Pawel Moll <pawel.moll-5wv7dgnIgG8@public.gmane.org>,
Mark Rutland <mark.rutland-5wv7dgnIgG8@public.gmane.org>,
Ian Campbell
<ijc+devicetree-KcIKpvwj1kUDXYZnReoRVg@public.gmane.org>,
Kumar Gala <galak-sgV2jX0FEOL9JmXXK+q4OQ@public.gmane.org>,
linux-arm-kernel
<linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org>,
devicetree <devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>,
linux-kernel
<linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>,
Shuge <shuge-0TFLnhJekD6UEPyfVivIlAC/G2K4zDHf@public.gmane.org>,
Meng Zhang
<kevin-0TFLnhJekD6UEPyfVivIlAC/G2K4zDHf@public.gmane.org>,
yhf <yhf-HcjymKqD97rQT0dZR+AlfA@public.gmane.org>,
ctl <ctl-HcjymKqD97rQT0dZR+AlfA@public.gmane.org>,
linux-sunxi <linux-sunxi-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org>
Subject: Re: Re: [PATCH 3/6] ARM: dts: sunxi: Add Allwinner A80 dtsi
Date: Wed, 24 Sep 2014 14:36:12 +0200 [thread overview]
Message-ID: <5422BABC.7020906@free-electrons.com> (raw)
In-Reply-To: <CAGb2v64yGmdLeWmA=+nxD85DbQf_xxUNx3n3oedFZi51uc50+w-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
Hi Chen-Yu,
>
> Thanks for the tip. Before I send v2, I do have a question. I'm using
>
> ranges = <0 0 0 0x20000000>;
>
> in the clocks and soc node to avoid having to use 64bit values for all
> addresses and sizes. Would this be undesirable, even bad practice maybe?
We did something like that for all the internal registers too as they are all
under 4GB. In our case the use of a range really makes sens because the hardware
addresses were configurable. You don't have such requirement so I can't say if
it is a bad practice. From my point of view it seems sensible but I am not an
DT expert.
Grégory
--
Gregory Clement, Free Electrons
Kernel, drivers, real-time and embedded Linux
development, consulting, training and support.
http://free-electrons.com
--
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WARNING: multiple messages have this Message-ID (diff)
From: gregory.clement@free-electrons.com (Gregory CLEMENT)
To: linux-arm-kernel@lists.infradead.org
Subject: [linux-sunxi] Re: [PATCH 3/6] ARM: dts: sunxi: Add Allwinner A80 dtsi
Date: Wed, 24 Sep 2014 14:36:12 +0200 [thread overview]
Message-ID: <5422BABC.7020906@free-electrons.com> (raw)
In-Reply-To: <CAGb2v64yGmdLeWmA=+nxD85DbQf_xxUNx3n3oedFZi51uc50+w@mail.gmail.com>
Hi Chen-Yu,
>
> Thanks for the tip. Before I send v2, I do have a question. I'm using
>
> ranges = <0 0 0 0x20000000>;
>
> in the clocks and soc node to avoid having to use 64bit values for all
> addresses and sizes. Would this be undesirable, even bad practice maybe?
We did something like that for all the internal registers too as they are all
under 4GB. In our case the use of a range really makes sens because the hardware
addresses were configurable. You don't have such requirement so I can't say if
it is a bad practice. From my point of view it seems sensible but I am not an
DT expert.
Gr?gory
--
Gregory Clement, Free Electrons
Kernel, drivers, real-time and embedded Linux
development, consulting, training and support.
http://free-electrons.com
next prev parent reply other threads:[~2014-09-24 12:36 UTC|newest]
Thread overview: 51+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-09-21 14:58 [PATCH 0/6] ARM: sunxi: Add basic support for Allwinner A80 SoC Chen-Yu Tsai
2014-09-21 14:58 ` Chen-Yu Tsai
2014-09-21 14:58 ` Chen-Yu Tsai
2014-09-21 14:58 ` [PATCH 1/6] ARM: sunxi: Introduce Allwinner A80 support Chen-Yu Tsai
2014-09-21 14:58 ` Chen-Yu Tsai
2014-09-21 14:58 ` Chen-Yu Tsai
2014-09-21 14:58 ` [PATCH 2/6] ARM: sunxi: Add debug uart used by sun9i (Allwinner A80) Chen-Yu Tsai
2014-09-21 14:58 ` Chen-Yu Tsai
2014-09-21 14:58 ` Chen-Yu Tsai
2014-09-24 6:39 ` Maxime Ripard
2014-09-24 6:39 ` Maxime Ripard
2014-09-24 6:39 ` Maxime Ripard
2014-09-21 14:58 ` [PATCH 3/6] ARM: dts: sunxi: Add Allwinner A80 dtsi Chen-Yu Tsai
2014-09-21 14:58 ` Chen-Yu Tsai
2014-09-21 14:58 ` Chen-Yu Tsai
2014-09-24 6:37 ` Maxime Ripard
2014-09-24 6:37 ` Maxime Ripard
2014-09-24 6:37 ` Maxime Ripard
2014-09-24 7:14 ` [linux-sunxi] " Chen-Yu Tsai
2014-09-24 7:14 ` Chen-Yu Tsai
2014-09-24 7:14 ` Chen-Yu Tsai
2014-09-24 7:18 ` [linux-sunxi] " Gregory CLEMENT
2014-09-24 7:18 ` Gregory CLEMENT
2014-09-24 7:18 ` Gregory CLEMENT
2014-09-24 7:27 ` [linux-sunxi] " Chen-Yu Tsai
2014-09-24 7:27 ` Chen-Yu Tsai
2014-09-24 7:27 ` Chen-Yu Tsai
2014-09-24 11:53 ` [linux-sunxi] " Chen-Yu Tsai
2014-09-24 11:53 ` Chen-Yu Tsai
2014-09-24 11:53 ` Chen-Yu Tsai
2014-09-24 12:36 ` Gregory CLEMENT [this message]
2014-09-24 12:36 ` [linux-sunxi] " Gregory CLEMENT
2014-09-24 12:36 ` Gregory CLEMENT
2014-09-21 14:58 ` [PATCH 4/6] ARM: dts: sun9i: Add A80 Optimus Board support Chen-Yu Tsai
2014-09-21 14:58 ` Chen-Yu Tsai
2014-09-21 14:58 ` Chen-Yu Tsai
2014-09-21 14:58 ` [PATCH 5/6] devicetree: bindings: Add vendor prefix for Merrii Technology Co., Ltd Chen-Yu Tsai
2014-09-21 14:58 ` Chen-Yu Tsai
2014-09-21 14:58 ` Chen-Yu Tsai
2014-09-21 14:58 ` [PATCH 6/6] devicetree: bindings: Document supported Allwinner sunxi SoCs Chen-Yu Tsai
2014-09-21 14:58 ` Chen-Yu Tsai
2014-09-21 14:58 ` Chen-Yu Tsai
2014-09-24 6:41 ` [PATCH 0/6] ARM: sunxi: Add basic support for Allwinner A80 SoC Maxime Ripard
2014-09-24 6:41 ` Maxime Ripard
2014-09-24 6:41 ` Maxime Ripard
2014-09-24 10:40 ` Chen-Yu Tsai
2014-09-24 10:40 ` Chen-Yu Tsai
2014-09-24 10:40 ` Chen-Yu Tsai
2014-09-24 13:28 ` Maxime Ripard
2014-09-24 13:28 ` Maxime Ripard
2014-09-24 13:28 ` Maxime Ripard
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