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SubjectRe: [PATCH v2 2/2] arm64: dts: imx8mm-evk: Enable audio codec wm8524
Hi Marco,

On Tue, Apr 23, 2019 at 8:19 AM Marco Felsch <m.felsch@pengutronix.de> wrote:
>
> Hi Daniel,
>
> On 19-04-22 19:36, Daniel Baluta wrote:
> > i.MX8MM has one wm8524 audio codec connected with
> > SAI3 digital audio interface.
> >
> > This patch uses simple-card machine driver in order
> > to enable wm8524 codec.
> >
> > We need to set:
> > * SAI3 pinctrl configuration
> > * clock hierarchy
> > * codec node
> > * simple-card configuration
> >
> > Signed-off-by: Daniel Baluta <daniel.baluta@nxp.com>
> > ---
> > arch/arm64/boot/dts/freescale/imx8mm-evk.dts | 48 ++++++++++++++++++++
> > 1 file changed, 48 insertions(+)
> >
> > diff --git a/arch/arm64/boot/dts/freescale/imx8mm-evk.dts b/arch/arm64/boot/dts/freescale/imx8mm-evk.dts
> > index 2d5d89475b76..207b13266a96 100644
> > --- a/arch/arm64/boot/dts/freescale/imx8mm-evk.dts
> > +++ b/arch/arm64/boot/dts/freescale/imx8mm-evk.dts
> > @@ -37,6 +37,35 @@
> > gpio = <&gpio2 19 GPIO_ACTIVE_HIGH>;
> > enable-active-high;
> > };
> > +
> > + wm8524: audio-codec {
> > + #sound-dai-cells = <0>;
> > + compatible = "wlf,wm8524";
> > + wlf,mute-gpios = <&gpio5 21 GPIO_ACTIVE_LOW>;
>
> I would mux the gpio where I use them.

I'm not sure I understand this. Can you provide an example.
>
> > + };
> > +
> > + sound-wm8524 {
> > + compatible = "simple-audio-card";
> > + simple-audio-card,name = "wm8524-audio";
> > + simple-audio-card,format = "i2s";
> > + simple-audio-card,frame-master = <&cpudai>;
> > + simple-audio-card,bitclock-master = <&cpudai>;
> > + simple-audio-card,widgets =
> > + "Line", "Left Line Out Jack",
> > + "Line", "Right Line Out Jack";
> > + simple-audio-card,routing =
> > + "Left Line Out Jack", "LINEVOUTL",
> > + "Right Line Out Jack", "LINEVOUTR";
> > +
> > + cpudai: simple-audio-card,cpu {
> > + sound-dai = <&sai3>;
> > + };
> > +
> > + link_codec: simple-audio-card,codec {
>
> Can you drop that phandle?

I see your point here. But for symmetry and consistency with
imx8mm-evk I would prefer
to keep it like that.

https://git.kernel.org/pub/scm/linux/kernel/git/shawnguo/linux.git/tree/arch/arm64/boot/dts/freescale/imx8mq-evk.dts?h=for-next#n59

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