linux-kernel - Re: [PATCH v4 7/8] dt-bindings: arm: sunxi: add binding for Lichee Zero Plus core board

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Date:   Wed, 24 Jul 2019 21:09:01 +0800
From:   Icenowy Zheng <icenowy@...c.io>
To:     Maxime Ripard <maxime.ripard@...tlin.com>
Cc:     devicetree@...r.kernel.org,
        Linus Walleij <linus.walleij@...aro.org>,
        linux-kernel@...r.kernel.org, linux-gpio@...r.kernel.org,
        linux-sunxi@...glegroups.com, Rob Herring <robh+dt@...nel.org>,
        Chen-Yu Tsai <wens@...e.org>, linux-clk@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH v4 7/8] dt-bindings: arm: sunxi: add binding for Lichee
 Zero Plus core board

在 2019-07-23 03:29，Maxime Ripard 写道：
> On Sat, Jul 20, 2019 at 07:39:08PM +0800, Icenowy Zheng wrote:
>> 
>> 
>> 于 2019年7月20日 GMT+08:00 下午6:13:18, Maxime Ripard 
>> <maxime.ripard@...tlin.com> 写到:
>> >On Sat, Jul 13, 2019 at 11:46:33AM +0800, Icenowy Zheng wrote:
>> >> The Lichee Zero Plus is a core board made by Sipeed, with a microUSB
>> >> connector on it, TF slot or WSON8 SD chip, optional eMMC or SPI
>> >Flash.
>> >> It has a gold finger connector for expansion, and UART is available
>> >from
>> >> reserved pins w/ 2.54mm pitch. The board can use either SoChip S3 or
>> >> Allwinner V3L SoCs.
>> >>
>> >> Add the device tree binding of the basic version of the core board --
>> >> w/o eMMC or SPI Flash, w/ TF slot or WSON8 SD, and use S3 SoC.
>> >>
>> >> Signed-off-by: Icenowy Zheng <icenowy@...c.io>
>> >> ---
>> >> No changes since v3.
>> >>
>> >> Patch introduced in v2.
>> >>
>> >>  Documentation/devicetree/bindings/arm/sunxi.yaml | 5 +++++
>> >>  1 file changed, 5 insertions(+)
>> >>
>> >> diff --git a/Documentation/devicetree/bindings/arm/sunxi.yaml
>> >b/Documentation/devicetree/bindings/arm/sunxi.yaml
>> >> index 000a00d12d6a..48c126a7a848 100644
>> >> --- a/Documentation/devicetree/bindings/arm/sunxi.yaml
>> >> +++ b/Documentation/devicetree/bindings/arm/sunxi.yaml
>> >> @@ -353,6 +353,11 @@ properties:
>> >>            - const: licheepi,licheepi-zero
>> >>            - const: allwinner,sun8i-v3s
>> >>
>> >> +      - description: Lichee Zero Plus (with S3, without eMMC/SPI
>> >Flash)
>> >> +        items:
>> >> +          - const: sipeed,lichee-zero-plus
>> >> +          - const: allwinner,sun8i-s3
>> >
>> >If the S3 is just a rebranded V3, then we should have the v3 compatile
>> >in that list too.
>> 
>> S3 is V3 with copackaged DDR3 DRAM.
>> 
>> It's pin incompatible w/ V3.
> 
> Does it matter though?
> 
> If the only thing that changes is the package, we're not manipulating
> that, and any software that deals with the v3 can deal with the
> s3. Which is what the compatible is about.

Okay. Should the S3 compatible be kept befoer the V3 one?

> 
> Maxime
> 
> --
> Maxime Ripard, Bootlin
> Embedded Linux and Kernel engineering
> https://bootlin.com
> 
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> linux-arm-kernel@...ts.infradead.org
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