linux-kernel - RE: [PATCH 2/2] ARM: dts: imx6sx-sabreauto: add external 24MHz clock source

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Date:   Mon, 19 Mar 2018 02:09:39 +0000
From:   Anson Huang <anson.huang@....com>
To:     Fabio Estevam <festevam@...il.com>
CC:     Shawn Guo <shawnguo@...nel.org>,
        Sascha Hauer <kernel@...gutronix.de>,
        Fabio Estevam <fabio.estevam@....com>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Russell King - ARM Linux <linux@...linux.org.uk>,
        Michael Turquette <mturquette@...libre.com>,
        Stephen Boyd <sboyd@...nel.org>,
        "S.j. Wang" <shengjiu.wang@....com>,
        dl-linux-imx <linux-imx@....com>,
        "moderated list:ARM/FREESCALE IMX / MXC ARM ARCHITECTURE" 
        <linux-arm-kernel@...ts.infradead.org>,
        "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" 
        <devicetree@...r.kernel.org>,
        linux-kernel <linux-kernel@...r.kernel.org>,
        linux-clk <linux-clk@...r.kernel.org>
Subject: RE: [PATCH 2/2] ARM: dts: imx6sx-sabreauto: add external 24MHz clock
 source

Hi, Fabio

Anson Huang
Best Regards!


> -----Original Message-----
> From: Fabio Estevam [mailto:festevam@...il.com]
> Sent: Sunday, March 18, 2018 9:04 PM
> To: Anson Huang <anson.huang@....com>
> Cc: Shawn Guo <shawnguo@...nel.org>; Sascha Hauer
> <kernel@...gutronix.de>; Fabio Estevam <fabio.estevam@....com>; Rob
> Herring <robh+dt@...nel.org>; Mark Rutland <mark.rutland@....com>;
> Russell King - ARM Linux <linux@...linux.org.uk>; Michael Turquette
> <mturquette@...libre.com>; Stephen Boyd <sboyd@...nel.org>; S.j. Wang
> <shengjiu.wang@....com>; dl-linux-imx <linux-imx@....com>; moderated
> list:ARM/FREESCALE IMX / MXC ARM ARCHITECTURE
> <linux-arm-kernel@...ts.infradead.org>; open list:OPEN FIRMWARE AND
> FLATTENED DEVICE TREE BINDINGS <devicetree@...r.kernel.org>; linux-kernel
> <linux-kernel@...r.kernel.org>; linux-clk <linux-clk@...r.kernel.org>
> Subject: Re: [PATCH 2/2] ARM: dts: imx6sx-sabreauto: add external 24MHz clock
> source
> 
> On Sun, Mar 18, 2018 at 12:14 AM, Anson Huang <Anson.Huang@....com>
> wrote:
> 
> > diff --git a/arch/arm/boot/dts/imx6sx-sabreauto.dts
> > b/arch/arm/boot/dts/imx6sx-sabreauto.dts
> > index 72da5ac..83f7cac 100644
> > --- a/arch/arm/boot/dts/imx6sx-sabreauto.dts
> > +++ b/arch/arm/boot/dts/imx6sx-sabreauto.dts
> > @@ -18,6 +18,14 @@
> >                 reg = <0x80000000 0x80000000>;
> >         };
> >
> > +       clocks {
> > +               codec_osc: anaclk2 {
> > +                       #clock-cells = <0>;
> > +                       compatible = "fixed-clock";
> > +                       clock-frequency = <24576000>;
> > +               };
> > +       };
> 
> The clocks container should be removed and the clock node could be put directly
> into the root node.
> 
> Also, I do not see 'codec_osc' being used in this dts.
 
This clock will be used by cs42888 codec, this patch is only to add basic clock source
to complete the clock tree. Thanks.

Anson.