linux-kernel - RE: [PATCH] ARM: dts: imx6sll-evk: make pfuze100 sw4 always on

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Date:   Tue, 26 Jun 2018 01:06:40 +0000
From:   Anson Huang <anson.huang@....com>
To:     Fabio Estevam <festevam@...il.com>
CC:     Shawn Guo <shawnguo@...nel.org>,
        Sascha Hauer <s.hauer@...gutronix.de>,
        Sascha Hauer <kernel@...gutronix.de>,
        Fabio Estevam <fabio.estevam@....com>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" 
        <devicetree@...r.kernel.org>, dl-linux-imx <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: imx6sll-evk: make pfuze100 sw4 always on

Hi, Fabio

Anson Huang
Best Regards!


> -----Original Message-----
> From: Fabio Estevam [mailto:festevam@...il.com]
> Sent: Monday, June 25, 2018 8:23 PM
> To: Anson Huang <anson.huang@....com>
> Cc: Shawn Guo <shawnguo@...nel.org>; Sascha Hauer
> <s.hauer@...gutronix.de>; Sascha Hauer <kernel@...gutronix.de>; Fabio
> Estevam <fabio.estevam@....com>; Rob Herring <robh+dt@...nel.org>;
> Mark Rutland <mark.rutland@....com>; open list:OPEN FIRMWARE AND
> FLATTENED DEVICE TREE BINDINGS <devicetree@...r.kernel.org>;
> dl-linux-imx <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: imx6sll-evk: make pfuze100 sw4 always on
> 
> Hi Anson,
> 
> On Fri, Jun 22, 2018 at 3:28 AM, Anson Huang <Anson.Huang@....com>
> wrote:
> > On i.MX6SLL EVK board, PFuze100's SW4 is supplying LPDDR3, it needs to
> > be always on. This patch fixes Linux kernel boot up hang caused by SW4
> > being turned
> > off:
> >
> > [    1.693613] cfg80211: failed to load regulatory.db
> > [    1.700063] SW4: disabling
> > [    1.703973] SWBST: disabling
> 
> It would be nice to mention in the commit log what was the patch that caused
> the breakage, just like Robin did for imx6sl-evk.
> 
> Thanks,
 
Done, already sent out V2 patch, please review it, thanks.

Anson.