linux-kernel - [PATCH 3/3] ASoC: dt-bindings: wlf,wm8782: Add max-rate property

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Date:   Fri, 11 Aug 2023 08:49:30 +1000
From:   John Watts <contact@...kia.org>
To:     alsa-devel@...a-project.org
Cc:     Liam Girdwood <lgirdwood@...il.com>,
        Mark Brown <broonie@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Jaroslav Kysela <perex@...ex.cz>,
        Takashi Iwai <tiwai@...e.com>, John Watts <contact@...kia.org>,
        patches@...nsource.cirrus.com, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH 3/3] ASoC: dt-bindings: wlf,wm8782: Add max-rate property

The WM8782 can safely support rates higher than 48kHz by changing the
value of the FSAMPEN pin.

Allow specifying the maximum support rate the hardware configuration
supports in the device tree.

Signed-off-by: John Watts <contact@...kia.org>
---
 Documentation/devicetree/bindings/sound/wm8782.txt | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/Documentation/devicetree/bindings/sound/wm8782.txt b/Documentation/devicetree/bindings/sound/wm8782.txt
index 256cdec6ec4d..a68061a3e671 100644
--- a/Documentation/devicetree/bindings/sound/wm8782.txt
+++ b/Documentation/devicetree/bindings/sound/wm8782.txt
@@ -7,6 +7,7 @@ Required properties:
  - compatible  : "wlf,wm8782"
  - Vdda-supply : phandle to a regulator for the analog power supply (2.7V - 5.5V)
  - Vdd-supply  : phandle to a regulator for the digital power supply (2.7V - 3.6V)
+ - max-rate    : max supported audio rate configured by FSAMPEN pin, defaults to 48000
 
 Example:
 
@@ -14,4 +15,5 @@ wm8782: stereo-adc {
 	compatible = "wlf,wm8782";
 	Vdda-supply = <&vdda_supply>;
 	Vdd-supply = <&vdd_supply>;
+	max-rate = <96000>; /* FSAMPEN is 1 */
 };
-- 
2.41.0