linux-kernel - Re: [PATCH 1/1] ARM: dts: sunxi: Add a olinuxino-lime2-emmc

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Message-ID: <CAGb2v66r9m7qVW6BszeT2wqs0KyEr4x5ivTJYqu2Fes=R9-Ltw@mail.gmail.com>
Date:	Tue, 3 May 2016 15:25:25 +0800
From:	Chen-Yu Tsai <wens@...e.org>
To:	Olliver Schinagl <oliver@...inagl.nl>
Cc:	Chen-Yu Tsai <wens@...e.org>,
	Maxime Ripard <maxime.ripard@...e-electrons.com>,
	Tsvetan Usunov <tsvetan@...mex.com>,
	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>,
	Russell King <linux@....linux.org.uk>,
	Hans de Goede <hdegoede@...hat.com>,
	dev <dev@...ux-sunxi.org>,
	devicetree <devicetree@...r.kernel.org>,
	linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>,
	linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 1/1] ARM: dts: sunxi: Add a olinuxino-lime2-emmc

On Tue, May 3, 2016 at 3:21 PM, Olliver Schinagl <oliver@...inagl.nl> wrote:
> Hey Chen,

ChenYu :)

>
>
> On 03-05-16 05:33, Chen-Yu Tsai wrote:
>>
>> Hi,
>>
>> On Thu, Apr 28, 2016 at 3:19 PM, Olliver Schinagl <oliver@...inagl.nl>
>> wrote:
>>>
>>> There are 3 kinds of OLinuXino Lime2 boards.
>>> One without any on board storage, one with NAND storage and one with
>>> eMMC storage. This patch adds the eMMC variant of boards.
>>>
>>> eMMC storage is different from a regular SD card in that it is soldered
>>> on the board and cannot be changed. Additionally, it shares pins with
>>> the NAND module and with the second SPI port.
>>>
>>> Signed-off-by: Olliver Schinagl <oliver@...inagl.nl>
>>> ---
>>>   .../boot/dts/sun7i-a20-olinuxino-lime2-emmc.dts    | 64
>>> ++++++++++++++++++++++
>>>   1 file changed, 64 insertions(+)
>>>   create mode 100644 arch/arm/boot/dts/sun7i-a20-olinuxino-lime2-emmc.dts
>>>
>>> diff --git a/arch/arm/boot/dts/sun7i-a20-olinuxino-lime2-emmc.dts
>>> b/arch/arm/boot/dts/sun7i-a20-olinuxino-lime2-emmc.dts
>>> new file mode 100644
>>> index 0000000..689da36
>>> --- /dev/null
>>> +++ b/arch/arm/boot/dts/sun7i-a20-olinuxino-lime2-emmc.dts
>>> @@ -0,0 +1,64 @@
>>> + /*
>>> + * Copyright 2015 - Ultimaker B.V.
>>> + * Author Olliver Schinagl <oliver@...inagl.nl>
>>> + *
>>> + * 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 file 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 file 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.
>>> + *
>>> + * 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.
>>> + */
>>> +
>>> +#include "sun7i-a20-olinuxino-lime2.dts"
>>> +
>>> +/ {
>>> +       model = "Olimex A20-OLinuXino-LIME2-eMMC";
>>> +};
>>> +
>>> +&mmc2 {
>>> +       pinctrl-names = "default";
>>> +       pinctrl-0 = <&mmc2_pins_a>;
>>> +       vmmc-supply = <&reg_vcc3v3>;
>>> +       bus-width = <4>;
>>
>> Only 4 bits? We normally see eMMC with 8 bits. 4 bits are some kind of
>> embedded SD card.
>
> On A20 as well? Our investigations so far have concluded that the A10 and
> A20 have those pins not mapped out to pads. The IP does support it however
> we assume.

You're right. My bad. First time A10/A20 sees eMMC support.

>>
>>
>>> +       non-removable;
>>> +       no-1-8-v;
>>
>> This flag is not supported on sunxi.
>>
>> Instead, use the vqmmc-supply with the correct regulator and constraints.
>
> That was not supposed to be there, i'll fix it! Sorry.

Thanks
ChenYu

>
>>
>> ChenYu
>>
>>> +       status = "okay";
>>> +
>>> +       emmc: emmc@0 {
>>> +               reg = <0>;
>>> +               compatible = "mmc-card";
>>> +               broken-hpi;
>>> +       };
>>> +};
>>> --
>>> 2.8.0.rc3
>>>
>