RE: [PATCH v1] ARM: dts: imx6sl-evk: keep sw4 always on

[Anson Huang]

Anson Huang
Best Regards!


> -----Original Message-----
> From: Fabio Estevam [mailto:festevam@xxxxxxxxx]
> Sent: Monday, July 2, 2018 9:05 AM
> To: Anson Huang <anson.huang@xxxxxxx>
> Cc: Shawn Guo <shawnguo@xxxxxxxxxx>; Robin Gong <yibin.gong@xxxxxxx>;
> Mark Rutland <mark.rutland@xxxxxxx>; open list:OPEN FIRMWARE AND
> FLATTENED DEVICE TREE BINDINGS <devicetree@xxxxxxxxxxxxxxx>;
> linux-kernel <linux-kernel@xxxxxxxxxxxxxxx>; Rob Herring
> <robh+dt@xxxxxxxxxx>; dl-linux-imx <linux-imx@xxxxxxx>; Sascha Hauer
> <kernel@xxxxxxxxxxxxxx>; Fabio Estevam <fabio.estevam@xxxxxxx>;
> moderated list:ARM/FREESCALE IMX / MXC ARM ARCHITECTURE
> <linux-arm-kernel@xxxxxxxxxxxxxxxxxxx>
> Subject: Re: [PATCH v1] ARM: dts: imx6sl-evk: keep sw4 always on
> 
> On Sun, Jul 1, 2018 at 10:03 PM, Anson Huang <anson.huang@xxxxxxx>
> wrote:
> 
> > So that mean such kind of kernel patch will never be into kernel? Even
> > if it is a necessary patch for fixing some other issues? I just wonder
> > how this case being handled.
> 
> What is the issue that 5fe156f1cab4f fixes? It is not clear by looking at the
> commit log.

On some new i.MX platforms, PFuze switches are used for supplying GPU/VPU
or other non-critical modules only, these switches need to be turned off by
runtime PM to avoid very high power leakage, like on mScale850D.

Anson