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Date:   Mon, 18 Nov 2019 21:40:47 +0300
From:   "Matwey V. Kornilov" <matwey.kornilov@...il.com>
To:     Heiko Stuebner <heiko@...ech.de>
Cc:     Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Ezequiel Garcia <ezequiel@...labora.com>,
        Akash Gajjar <akash@...nedev.com>,
        "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" 
        <devicetree@...r.kernel.org>,
        "moderated list:ARM/Rockchip SoC support" 
        <linux-arm-kernel@...ts.infradead.org>,
        "open list:ARM/Rockchip SoC support" 
        <linux-rockchip@...ts.infradead.org>,
        open list <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2] arm64: dts: rockchip: Enable PCIe for Radxa Rock Pi 4 board

пн, 18 нояб. 2019 г. в 03:46, Heiko Stuebner <heiko@...ech.de>:
>
> Hi Matwey,
>
> Am Sonntag, 17. November 2019, 11:15:37 CET schrieb Matwey V. Kornilov:
> > Radxa Rock Pi 4 is equipped with M.2 PCIe slot,
> > so enable PCIe for the board.
> >
> > The changes has been tested with Intel SSD 660p series device.
> >
> >     01:00.0 Class 0108: Device 8086:f1a8 (rev 03)
> >
> > Signed-off-by: Matwey V. Kornilov <matwey@....msu.ru>
>
> applied the patch, but you could do a follow-up that mimics
> https://lore.kernel.org/linux-arm-kernel/20191117140728.917-1-linux.amoon@gmail.com/
>
> aka find out from the schematics where the 0.9 and 1.8 supplies come from.

Current schematics
(https://dl.radxa.com/rockpi4/docs/hw/rockpi4/rockpi4_v13_sch_20181112.pdf)
is controversial on 1.8 supply:

On sheet 15 it says that 1.8 is supplied by VCC_1V8
at the same time on sheet 3 it says that it is supplied by VCCA_1V8

>
> Thanks
> Heiko
>
>


-- 
With best regards,
Matwey V. Kornilov

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