dt-bindings: clock: Add support for LPASS Audio Clock Controller

Audio Clock controller is a block inside LPASS which controls
2 Glitch free muxes to LPASS codec Macros.
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Link: https://lore.kernel.org/r/20201026120221.18984-2-srinivas.kandagatla@linaro.orgReviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Stephen Boyd <sboyd@kernel.org>

Documentation/devicetree/bindings/clock/qcom,audiocc-sm8250.yaml

+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/clock/qcom,audiocc-sm8250.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Clock bindings for LPASS Audio Clock Controller on SM8250 SoCs
+
+maintainers:
+  - Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
+
+description: |
+  The clock consumer should specify the desired clock by having the clock
+  ID in its "clocks" phandle cell.
+  See include/dt-bindings/clock/qcom,sm8250-lpass-audiocc.h for the full list
+  of Audio Clock controller clock IDs.
+
+properties:
+  compatible:
+    const: qcom,sm8250-lpass-audiocc
+
+  reg:
+    maxItems: 1
+
+  '#clock-cells':
+    const: 1
+
+  clocks:
+    items:
+      - description: LPASS Core voting clock
+      - description: Glitch Free Mux register clock
+
+  clock-names:
+    items:
+      - const: core
+      - const: bus
+
+required:
+  - compatible
+  - reg
+  - '#clock-cells'
+  - clocks
+  - clock-names
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/clock/qcom,sm8250-lpass-audiocc.h>
+    #include <dt-bindings/sound/qcom,q6afe.h>
+    clock-controller@3300000 {
+      #clock-cells = <1>;
+      compatible = "qcom,sm8250-lpass-audiocc";
+      reg = <0x03300000 0x30000>;
+      clocks = <&q6afecc LPASS_HW_MACRO_VOTE LPASS_CLK_ATTRIBUTE_COUPLE_NO>,
+               <&q6afecc LPASS_CLK_ID_TX_CORE_MCLK LPASS_CLK_ATTRIBUTE_COUPLE_NO>;
+      clock-names = "core", "bus";
+    };

include/dt-bindings/clock/qcom,sm8250-lpass-audiocc.h

+/* SPDX-License-Identifier: GPL-2.0 */
+
+#ifndef _DT_BINDINGS_CLK_LPASS_AUDIOCC_SM8250_H
+#define _DT_BINDINGS_CLK_LPASS_AUDIOCC_SM8250_H
+
+/* From AudioCC */
+#define LPASS_CDC_WSA_NPL				0
+#define LPASS_CDC_WSA_MCLK				1
+#define LPASS_CDC_RX_MCLK				2
+#define LPASS_CDC_RX_NPL				3
+#define LPASS_CDC_RX_MCLK_MCLK2				4
+
+#endif /* _DT_BINDINGS_CLK_LPASS_AUDIOCC_SM8250_H */