linux-kernel - Re: [PATCH] ARM: dts: imx6qdl: only enable pcie in the pcie dts file

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Message-ID: <CAOMZO5CGDzzADq6yC1FMStc1ZcuLS5mVahf_EOe1RNfdki9+Jw@mail.gmail.com>
Date:   Wed, 8 Jul 2020 14:48:56 -0300
From:   Fabio Estevam <festevam@...il.com>
To:     Richard Zhu <hongxing.zhu@....com>
Cc:     Shawn Guo <shawnguo@...nel.org>,
        NXP Linux Team <linux-imx@....com>,
        "moderated list:ARM/FREESCALE IMX / MXC ARM ARCHITECTURE" 
        <linux-arm-kernel@...ts.infradead.org>,
        linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] ARM: dts: imx6qdl: only enable pcie in the pcie dts file

Hi Richard,

On Mon, Jul 6, 2020 at 5:49 AM Richard Zhu <hongxing.zhu@....com> wrote:
>
> Since iMX6Q/DL PCIe has the PM limitation (ERR005723 "PCIe PCIe does
> not support L2 Power Down").
> System suspend/resume would be broken by PCIe, if PCIe is enabled.
> Only enable PCIe in the xxx-pcie.dts files to avoid the brokens when
> other xxx.dtb files are used on sabresd and sabreauto boards.

We have several imx6 dts files that currently enable pcie.

Can't we have a proper software workaround for this issue instead?

Thanks