Message-ID: <CAGb2v64-zshYgcPo-WR0TVebUDY3=LKBA9DfTVDKk2PA6VSiUA@mail.gmail.com>
Date:	Mon, 29 Sep 2014 18:04:50 +0800
From:	Chen-Yu Tsai <wens@...e.org>
To:	Maxime Ripard <maxime.ripard@...e-electrons.com>
Cc:	Rob Herring <robh+dt@...nel.org>, Pawel Moll <pawel.moll@....com>,
	Mark Rutland <mark.rutland@....com>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Kumar Gala <galak@...eaurora.org>,
	linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>,
	devicetree <devicetree@...r.kernel.org>,
	linux-kernel <linux-kernel@...r.kernel.org>,
	Shuge <shuge@...winnertech.com>,
	Meng Zhang <kevin@...winnertech.com>, ctl <ctl@...rii.com>,
	Gregory CLEMENT <gregory.clement@...e-electrons.com>
Subject: Re: [PATCH v2 4/7] ARM: dts: sun9i: Add A80 Optimus Board support

On Mon, Sep 29, 2014 at 5:53 PM, Maxime Ripard
<maxime.ripard@...e-electrons.com> wrote:
> On Sat, Sep 27, 2014 at 09:10:48PM +0800, Chen-Yu Tsai wrote:
>> On Thu, Sep 25, 2014 at 9:34 PM, Maxime Ripard
>> <maxime.ripard@...e-electrons.com> wrote:
>> > On Wed, Sep 24, 2014 at 10:48:58PM +0800, Chen-Yu Tsai wrote:
>> >> The A80 Optimus Board is was launched with the Allwinner A80 SoC.
>> >> It was jointly developed by Allwinner and Merrii.
>> >>
>> >> This board has a UART port, a JTAG connector, USB host ports, a USB
>> >> 3.0 OTG connector, an HDMI output, a micro SD slot, 8G NAND flash,
>> >> 4G DRAM, a camera sensor interface, a WiFi/BT combo chip, a headphone
>> >> jack, IR receiver, and additional GPIO headers.
>> >>
>> >> This patch adds only basic support.
>> >>
>> >> Signed-off-by: Chen-Yu Tsai <wens@...e.org>
>> >> ---
>> >>  arch/arm/boot/dts/Makefile              |  2 +
>> >>  arch/arm/boot/dts/sun9i-a80-optimus.dts | 66 +++++++++++++++++++++++++++++++++
>> >>  2 files changed, 68 insertions(+)
>> >>  create mode 100644 arch/arm/boot/dts/sun9i-a80-optimus.dts
>> >>
>> >> diff --git a/arch/arm/boot/dts/Makefile b/arch/arm/boot/dts/Makefile
>> >> index 2f42b18..098f319 100644
>> >> --- a/arch/arm/boot/dts/Makefile
>> >> +++ b/arch/arm/boot/dts/Makefile
>> >> @@ -424,6 +424,8 @@ dtb-$(CONFIG_MACH_SUN7I) += \
>> >>       sun7i-a20-pcduino3.dtb
>> >>  dtb-$(CONFIG_MACH_SUN8I) += \
>> >>       sun8i-a23-ippo-q8h-v5.dtb
>> >> +dtb-$(CONFIG_MACH_SUN9I) += \
>> >> +     sun9i-a80-optimus.dtb
>> >>  dtb-$(CONFIG_ARCH_TEGRA) += tegra20-harmony.dtb \
>> >>       tegra20-iris-512.dtb \
>> >>       tegra20-medcom-wide.dtb \
>> >> diff --git a/arch/arm/boot/dts/sun9i-a80-optimus.dts b/arch/arm/boot/dts/sun9i-a80-optimus.dts
>> >> new file mode 100644
>> >> index 0000000..f83abab
>> >> --- /dev/null
>> >> +++ b/arch/arm/boot/dts/sun9i-a80-optimus.dts
>> >> @@ -0,0 +1,66 @@
>> >> +/*
>> >> + * Copyright 2014 Chen-Yu Tsai
>> >> + *
>> >> + * Chen-Yu Tsai <wens@...e.org>
>> >> + *
>> >> + * This file is dual-licensed: you can use it either under the terms
>> >> + * of the GPL or the X11 license, at your option. Note that this dual
>> >> + * licensing only applies to this file, and not this project as a
>> >> + * whole.
>> >> + *
>> >> + *  a) This library is free software; you can redistribute it and/or
>> >> + *     modify it under the terms of the GNU General Public License as
>> >> + *     published by the Free Software Foundation; either version 2 of the
>> >> + *     License, or (at your option) any later version.
>> >> + *
>> >> + *     This library is distributed in the hope that it will be useful,
>> >> + *     but WITHOUT ANY WARRANTY; without even the implied warranty of
>> >> + *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
>> >> + *     GNU General Public License for more details.
>> >> + *
>> >> + *     You should have received a copy of the GNU General Public
>> >> + *     License along with this library; if not, write to the Free
>> >> + *     Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston,
>> >> + *     MA 02110-1301 USA
>> >> + *
>> >> + * Or, alternatively,
>> >> + *
>> >> + *  b) Permission is hereby granted, free of charge, to any person
>> >> + *     obtaining a copy of this software and associated documentation
>> >> + *     files (the "Software"), to deal in the Software without
>> >> + *     restriction, including without limitation the rights to use,
>> >> + *     copy, modify, merge, publish, distribute, sublicense, and/or
>> >> + *     sell copies of the Software, and to permit persons to whom the
>> >> + *     Software is furnished to do so, subject to the following
>> >> + *     conditions:
>> >> + *
>> >> + *     The above copyright notice and this permission notice shall be
>> >> + *     included in all copies or substantial portions of the Software.
>> >> + *
>> >> + *     THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
>> >> + *     EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
>> >> + *     OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
>> >> + *     NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
>> >> + *     HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
>> >> + *     WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
>> >> + *     FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
>> >> + *     OTHER DEALINGS IN THE SOFTWARE.
>> >> + */
>> >> +
>> >> +/dts-v1/;
>> >> +/include/ "sun9i-a80.dtsi"
>> >> +
>> >> +/ {
>> >> +     model = "Merrii A80 Optimus Board";
>> >> +     compatible = "merrii,a80-optimus", "allwinner,sun9i-a80";
>> >> +
>> >> +     chosen {
>> >> +             bootargs = "earlyprintk console=ttyS0,115200";
>> >> +     };
>> >
>> > Since you changed the memory node in the DTSI, you should probably add
>> > one here too, don't you?
>>
>> I thought we left fixing that to the bootloader?
>> I don't see any memory nodes in our other DTS.
>
> Yes, but does the A80 bootloader supports DT and actually fixes it? If
> not, then you'll still have to have a memory node, just like on the
> A31 (and presumably on the A23).

Not at the moment no. But last I checked none of our board dts files
have separate memory nodes. We only have them in the dtsi, with the
largest supported ram size as its value. Also the bootloader
(u-boot that is) can pass the memory size via atags I think.

At least I'm only getting 512MB RAM on my Optimus, due to u-boot
incorrectly assuming I only have as much. But that's another problem. :(

Would this be a problem when using Android fastboot from the stock
u-boot?


Cheers
ChenYu
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