linux-kernel - Re: [PATCH v1] ARM: dts: imx6sl-evk: keep sw4 always on

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Date:   Sun, 1 Jul 2018 22:00:21 -0300
From:   Fabio Estevam <festevam@...il.com>
To:     Anson Huang <anson.huang@....com>
Cc:     Shawn Guo <shawnguo@...nel.org>, Robin Gong <yibin.gong@....com>,
        Mark Rutland <mark.rutland@....com>,
        "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" 
        <devicetree@...r.kernel.org>,
        linux-kernel <linux-kernel@...r.kernel.org>,
        Rob Herring <robh+dt@...nel.org>,
        dl-linux-imx <linux-imx@....com>,
        Sascha Hauer <kernel@...gutronix.de>,
        Fabio Estevam <fabio.estevam@....com>,
        "moderated list:ARM/FREESCALE IMX / MXC ARM ARCHITECTURE" 
        <linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH v1] ARM: dts: imx6sl-evk: keep sw4 always on

Hi Anson,

On Sun, Jul 1, 2018 at 9:57 PM, Anson Huang <anson.huang@....com> wrote:

> Just want to know how to handle such case? The kernel patch will never
> be applied or is there any way to make kernel patch and dtb patch applied
> together to avoid any breakage?

We always want to avoid breaking a working dtb when it is used with a
newer kernel.

In this case we need to revert the kernel patch as it causes
regression with old dtbs.