Add bindings for FSD CPU DAI driver which supports stereo channel
audio playback and capture on FSD platform.

Signed-off-by: Padmanabhan Rajanbabu <p.rajanbabu@samsung.com>
---
 Documentation/devicetree/bindings/sound/samsung-i2s.yaml | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/Documentation/devicetree/bindings/sound/samsung-i2s.yaml b/Documentation/devicetree/bindings/sound/samsung-i2s.yaml
index 8d5dcf9cd43e..ff187e16d301 100644
--- a/Documentation/devicetree/bindings/sound/samsung-i2s.yaml
+++ b/Documentation/devicetree/bindings/sound/samsung-i2s.yaml
@@ -37,12 +37,16 @@ properties:
       samsung,exynos7-i2s1: I2S1 on previous samsung platforms supports
       stereo channels. Exynos7 I2S1 upgraded to 5.1 multichannel with
       slightly modified bit offsets.
+
+      tesla,fsd-i2s: with all the available features of Exynos7 I2S,
+      supporting only stereo channel playback and capture.
     enum:
       - samsung,s3c6410-i2s
       - samsung,s5pv210-i2s
       - samsung,exynos5420-i2s
       - samsung,exynos7-i2s
       - samsung,exynos7-i2s1
+      - tesla,fsd-i2s
 
   '#address-cells':
     const: 1
-- 
2.17.1

On Tue, Jan 03, 2023 at 10:26:09AM +0530, Padmanabhan Rajanbabu wrote:

> +
> +      tesla,fsd-i2s: with all the available features of Exynos7 I2S,
> +      supporting only stereo channel playback and capture.

The driver claims that 7.1 is also supported.

> -----Original Message-----
> From: Mark Brown [mailto:broonie@kernel.org]
> Sent: 03 January 2023 11:35 PM
> To: Padmanabhan Rajanbabu <p.rajanbabu@samsung.com>
> Cc: lgirdwood@gmail.com; robh+dt@kernel.org;
> krzysztof.kozlowski+dt@linaro.org; s.nawrocki@samsung.com;
> perex@perex.cz; tiwai@suse.com; pankaj.dubey@samsung.com;
> alim.akhtar@samsung.com; rcsekar@samsung.com;
> aswani.reddy@samsung.com; alsa-devel@alsa-project.org;
> devicetree@vger.kernel.org; linux-kernel@vger.kernel.org; linux-samsung-
> soc@vger.kernel.org
> Subject: Re: [PATCH v2 1/5] ASoC: dt-bindings: Add FSD I2S controller
> bindings
> 
> On Tue, Jan 03, 2023 at 10:26:09AM +0530, Padmanabhan Rajanbabu wrote:
> 
> > +
> > +      tesla,fsd-i2s: with all the available features of Exynos7 I2S,
> > +      supporting only stereo channel playback and capture.
> 
> The driver claims that 7.1 is also supported.

For I2S mode, data lines for channel 3 to 6 are not routed out of the SoC.
i.e FSD SoC has only SDO0 line routed out. SDO1 and 2 are floating pins. 

So Exynos7-I2S in FSD SoC supports only stereo playback and capture in
I2S mode. I'll reword the description in the next patch set to reflect the
above information.

Thanks,
Padmanabhan R.