linux-kernel - [PATCH v2 3/3] ASoC: dt-bindings: Add ESS ES9218P codec

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Date:   Mon, 15 May 2023 08:40:21 +0100
From:   Aidan MacDonald <aidanmacdonald.0x0@...il.com>
To:     lgirdwood@...il.com, broonie@...nel.org, robh+dt@...nel.org,
        krzysztof.kozlowski+dt@...aro.org, conor+dt@...nel.org
Cc:     perex@...ex.cz, tiwai@...e.com, alsa-devel@...a-project.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH v2 3/3] ASoC: dt-bindings: Add ESS ES9218P codec

Device tree bindings for the ESS ES9218P codec, which uses an
I2C control interface.

Signed-off-by: Aidan MacDonald <aidanmacdonald.0x0@...il.com>
---

Notes:
    v1->v2
    
    Address Krzysztof's review comments:
    
    - Add missing ref to dai-common.yaml
    - Simplify descriptions of supply properties
    - Remove unneeded clock names, the device has only one clock input
    - Use unevaluatedProperties instead of additionalProperties

 .../bindings/sound/ess,es9218p.yaml           | 101 ++++++++++++++++++
 1 file changed, 101 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/sound/ess,es9218p.yaml

diff --git a/Documentation/devicetree/bindings/sound/ess,es9218p.yaml b/Documentation/devicetree/bindings/sound/ess,es9218p.yaml
new file mode 100644
index 000000000000..53ca06539e0a
--- /dev/null
+++ b/Documentation/devicetree/bindings/sound/ess,es9218p.yaml
@@ -0,0 +1,101 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/sound/ess,es9218p.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: ESS ES9218P audio codec
+
+maintainers:
+  - Aidan MacDonald <aidanmacdonald.0x0@...il.com>
+
+allOf:
+  - $ref: dai-common.yaml#
+
+properties:
+  compatible:
+    const: ess,es9218p
+
+  reg:
+    maxItems: 1
+
+  "#sound-dai-cells":
+    const: 0
+
+  avdd-supply:
+    description:
+      Digital core power supply.
+
+  vcca-supply:
+    description:
+      Oscillator and DAC power supply.
+
+  avcc3v3-supply:
+    description:
+      3.3V regulator for amplifier, switch, and charge pumps.
+
+  avcc1v8-supply:
+    description:
+      1.8V regulator for amplifier, switch, and charge pumps.
+
+  clocks:
+    items:
+      - description: clock for master clock (MCLK)
+
+  reset-gpios:
+    maxItems: 1
+    description:
+      Pin used for codec hardware reset, corresponds to the RESETB pin.
+
+  ess,max-clock-div:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    description:
+      Sets the maximum MCLK divider for generating the internal CLK.
+      CLK must be at least 20x the I2C bus speed or I2C transactions
+      will fail. The maximum divider should be chosen to ensure that
+      CLK will not fall below the limit.
+    enum:
+      - 1
+      - 2
+      - 4
+      - 8
+    default: 1
+
+  ess,oscillator-pad-bias:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    description: Sets the oscillator pad drive bias. 0 - full bias, 15 - disabled.
+    minimum: 0
+    maximum: 15
+    default: 0
+
+required:
+  - compatible
+  - reg
+  - "#sound-dai-cells"
+  - avdd-supply
+  - vcca-supply
+  - avcc3v3-supply
+  - avcc1v8-supply
+  - clocks
+  - reset-gpios
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/gpio/gpio.h>
+    i2c {
+        #address-cells = <1>;
+        #size-cells = <0>;
+        codec@48 {
+            compatible = "ess,es9218p";
+            reg = <0x48>;
+            #sound-dai-cells = <0>;
+            avdd-supply = <&avdd>;
+            vcca-supply = <&vcca>;
+            avcc3v3-supply = <&avcc3v3>;
+            avcc1v8-supply = <&avcc1v8>;
+            clocks = <&xtal_clock>;
+            reset-gpios = <&gpio 1 GPIO_ACTIVE_LOW>;
+        };
+    };
-- 
2.39.2