linux-kernel - Re: [PATCH 5/5] arm64: dts: mediatek: cherry-tomato-r1: Enable NVMe PCI-Express port

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Message-ID: <CAGXv+5E5Ei9YffWQednLcmWBr2eXfsfjXBFRzxKJd+=O290xdQ@mail.gmail.com>
Date:   Mon, 24 Apr 2023 17:40:10 +0800
From:   Chen-Yu Tsai <wenst@...omium.org>
To:     AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>
Cc:     matthias.bgg@...il.com, robh+dt@...nel.org,
        krzysztof.kozlowski+dt@...aro.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org, kernel@...labora.com
Subject: Re: [PATCH 5/5] arm64: dts: mediatek: cherry-tomato-r1: Enable NVMe
 PCI-Express port

On Mon, Apr 24, 2023 at 4:13 PM AngeloGioacchino Del Regno
<angelogioacchino.delregno@...labora.com> wrote:
>
> Il 21/04/23 09:59, Chen-Yu Tsai ha scritto:
> > On Thu, Apr 20, 2023 at 5:45 PM AngeloGioacchino Del Regno
> > <angelogioacchino.delregno@...labora.com> wrote:
> >>
> >> On Tomato rev1 the PCIe0 controller is used for NVMe storage.
> >
> > This was slightly confusing for me. AFAIK rev1 is not an actual Tomato
> > device. It should be the prototype board, which is the original Cherry
> > reference design by Google [1].
> >
> > There is an actual Cherry derived device that has NVMe, though it's under
> > another brand and another name.
> >
>
> If revision 1 is not an actual Tomato device, and you can confirm that it is
> the prototype board... I can send a commit to entirely drop R1 as having it
> upstream would be of no use at all.

>From what I gathered from my colleagues, revision 1 was a Tomato prototype,
and also the second Cherry prototype board. There shouldn't be any of these
out in the wild.

FTR, the production version of Tomato is revision 4. Rev 2 and rev 3
engineering samples are available to partners, but otherwise limited.

ChenYu

> Cheers,
> Angelo
>
> > ChenYu
> >
> > [1] Much like Kukui & Jacuzzi (MT8183), and Asurada (MT8192) are the
> >      reference designs.  I don't think we ever upstream the reference
> >      boards because they don't really end up in the hands of people
> >      outside of the project, and the ones we do have tend to be quite
> >      beaten up or no longer working due to extensive testing.
> >
> >> Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>
> >> ---
> >>   arch/arm64/boot/dts/mediatek/mt8195-cherry-tomato-r1.dts | 7 +++++++
> >>   1 file changed, 7 insertions(+)
> >>
> >> diff --git a/arch/arm64/boot/dts/mediatek/mt8195-cherry-tomato-r1.dts b/arch/arm64/boot/dts/mediatek/mt8195-cherry-tomato-r1.dts
> >> index 2d5e8f371b6d..11fc83ddf236 100644
> >> --- a/arch/arm64/boot/dts/mediatek/mt8195-cherry-tomato-r1.dts
> >> +++ b/arch/arm64/boot/dts/mediatek/mt8195-cherry-tomato-r1.dts
> >> @@ -20,6 +20,13 @@ &sound {
> >>          model = "mt8195_r1019_5682";
> >>   };
> >>
> >> +&pcie0 {
> >> +       status = "okay";
> >> +
> >> +       pinctrl-names = "default";
> >> +       pinctrl-0 = <&pcie0_pins_default>;
> >> +};
> >> +
> >>   &ts_10 {
> >>          status = "okay";
> >>   };
> >> --
> >> 2.40.0
> >>
> >>
>