linux-kernel - Re: [PATCH] ASoC: sgtl5000: add support for a fixed sysclk frequency

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Message-ID: <CAOMZO5DpAJn7PPtM1=JmQrsAi=M1-ZdUUR1exg=Qvwwn9sWaGA@mail.gmail.com>
Date:   Tue, 17 Oct 2017 07:53:36 -0200
From:   Fabio Estevam <festevam@...il.com>
To:     Jakob Unterwurzacher <jakob.unterwurzacher@...obroma-systems.com>
Cc:     Fabio Estevam <fabio.estevam@....com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Klaus Goger <klaus.goger@...obroma-systems.com>,
        Liam Girdwood <lgirdwood@...il.com>,
        Mark Brown <broonie@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Jaroslav Kysela <perex@...ex.cz>,
        Takashi Iwai <tiwai@...e.com>,
        Richard Leitner <richard.leitner@...data.com>,
        Bhumika Goyal <bhumirks@...il.com>,
        "alsa-devel@...a-project.org" <alsa-devel@...a-project.org>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>
Subject: Re: [PATCH] ASoC: sgtl5000: add support for a fixed sysclk frequency

Hi Jakob,

On Tue, Oct 17, 2017 at 7:01 AM, Jakob Unterwurzacher
<jakob.unterwurzacher@...obroma-systems.com> wrote:

> Hi Fabio, I think I found a way to get our use-case working with just DTS configuration
> for simple-audio-card.
>
> When you define the “clocks” property for the "simple-audio-card,cpu” sub-node,
> set_sysclk is called only once, on startup - like the IMX driver does.
>
> We should get away without changes to the codec driver.

Excellent! This looks better :-)