linux-kernel - Re: [PATCH v3 1/9] ARM: dts: imx6ul-isiot: Add Sound card with codec node

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Date:   Thu, 15 Jun 2017 10:20:25 +0800
From:   Shawn Guo <shawnguo@...nel.org>
To:     Jagan Teki <jagan@...rulasolutions.com>
Cc:     Jagan Teki <jagan@...nedev.com>,
        linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>,
        devicetree <devicetree@...r.kernel.org>,
        linux-kernel <linux-kernel@...r.kernel.org>,
        Sascha Hauer <kernel@...gutronix.de>,
        Fabio Estevam <fabio.estevam@....com>,
        Matteo Lisi <matteo.lisi@...icam.com>,
        Michael Trimarchi <michael@...rulasolutions.com>
Subject: Re: [PATCH v3 1/9] ARM: dts: imx6ul-isiot: Add Sound card with codec
 node

On Wed, Jun 14, 2017 at 08:17:04PM +0530, Jagan Teki wrote:
> On Fri, Apr 7, 2017 at 6:46 PM, Shawn Guo <shawnguo@...nel.org> wrote:
> > On Thu, Apr 06, 2017 at 11:32:07PM +0530, Jagan Teki wrote:
> >> From: Jagan Teki <jagan@...rulasolutions.com>
> >>
> >> Add support for Sound card and related codec(via i2c1) nodes
> >> on Engicam Is.IoT MX6UL variant module boards.
> >>
> >> Cc: Shawn Guo <shawnguo@...nel.org>
> >> Cc: Matteo Lisi <matteo.lisi@...icam.com>
> >> Cc: Michael Trimarchi <michael@...rulasolutions.com>
> >> Signed-off-by: Jagan Teki <jagan@...rulasolutions.com>
> >> ---
> >> Changes for v3:
> >> - Replace fsl,imx-audio-sgtl5000 and use simple-audio-card
> >> Changes for v2:
> >> - Use proper [label:] node-name[@unit-address] for codec
> >> - Remove incorrect codec property 'wlf,shared-lrclk'
> >> - Remove 'gpr' from sound card node
> >>
> >>  arch/arm/boot/dts/imx6ul-isiot-common.dtsi | 10 +++++++
> >>  arch/arm/boot/dts/imx6ul-isiot.dtsi        | 44 ++++++++++++++++++++++++++++++
> >
> > Can you help me understand how these two files are related?  Why is
> > sgtl5000 added into one and sound node added into the other?
> 
> lcdif, ts and sound card which may differ based on the base-board
> connected with SOM, So I moved these stuff which are related to
> Starter kit supported once's and used with SOM dts files. if some
> other board with same SOM can have different lcdif and etc so they can
> define locally to dts.

I do not follow how these stuff are organized.  So far we have the
following isiot dts files.

 - imx6ul-isiot-common.dtsi
 - imx6ul-isiot.dtsi
 - imx6ul-isiot-emmc.dts and imx6ul-isiot-nand.dts

How are they mapping to SoM and base-board?

Shawn