linux-kernel - RE: [PATCH 1/2] ARM: dts: imx7d: Correct speed grading fuse settings

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Message-ID: <DB3PR0402MB3916411027B6F28179010327F58C0@DB3PR0402MB3916.eurprd04.prod.outlook.com>
Date:   Mon, 16 Sep 2019 02:55:15 +0000
From:   Anson Huang <anson.huang@....com>
To:     Leonard Crestez <leonard.crestez@....com>,
        "shawnguo@...nel.org" <shawnguo@...nel.org>
CC:     "robh+dt@...nel.org" <robh+dt@...nel.org>,
        "mark.rutland@....com" <mark.rutland@....com>,
        "s.hauer@...gutronix.de" <s.hauer@...gutronix.de>,
        "kernel@...gutronix.de" <kernel@...gutronix.de>,
        "festevam@...il.com" <festevam@...il.com>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        dl-linux-imx <linux-imx@....com>
Subject: RE: [PATCH 1/2] ARM: dts: imx7d: Correct speed grading fuse settings

Hi, Leonard

> On 2019-09-12 5:57 AM, Anson Huang wrote:
> > The 800MHz opp speed grading fuse mask should be 0xd instead of 0xf
> > according to fuse map definition:
> >
> > SPEED_GRADING[1:0]	MHz
> > 	00		800
> > 	01		500
> > 	10		1000
> > 	11		1200
> >
> > Signed-off-by: Anson Huang <Anson.Huang@....com>
> 
> Reviewed-by: Leonard Crestez <leonard.crestez@....com>
> 
> Are you going to add the 500mhz OPP as well?

So far no, as datasheet does NOT list 500MHz as OPP, this patch is just to make sure
the speed grading mask settings matches the fusemap file, NOT sure if 500MHz will be supported
officially.

Anson