linux-kernel - Re: [PATCH v3 2/2] arm64: dts: imx8mm-evk: Enable audio codec wm8524

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Date:   Mon, 20 May 2019 13:12:22 +0300
From:   Daniel Baluta <daniel.baluta@...il.com>
To:     Fabio Estevam <festevam@...il.com>
Cc:     Daniel Baluta <daniel.baluta@....com>,
        dl-linux-imx <linux-imx@....com>,
        Aisheng Dong <aisheng.dong@....com>,
        "S.j. Wang" <shengjiu.wang@....com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v3 2/2] arm64: dts: imx8mm-evk: Enable audio codec wm8524

<reduce audience to linux-imx>

Shengjiu,

Can you help me with this? Specifically: I couldn't find the schematic
showing the
exact connection pins between SAI and wm8524 codec.

I looked into our internal tree and the wm8524 codec always handles
CLK_SAIX_ROOT
but Fabio has a good point. This clock doesn't feeds the codec.

Unless, we can really look into the schematics and prove it otherwise.

On Thu, May 16, 2019 at 10:14 PM Fabio Estevam <festevam@...il.com> wrote:
>
> On Wed, May 15, 2019 at 11:42 AM Daniel Baluta <daniel.baluta@....com> wrote:
>
> > +               simple-audio-card,codec {
> > +                       sound-dai = <&wm8524>;
> > +                       clocks = <&clk IMX8MM_CLK_SAI3_ROOT>;
>
> IMX8MM_CLK_SAI3_ROOT is the internal clock that drives the SAI3
> interface, not an external clock that feeds the codec.
>
> It seems you should remove this 'clocks' entry.