[PATCH v2 1/3] ASoC: dt-bindings: qcom,lpass-va-csr: Add HeartBeat pulse clock

[Sarath Ganapathiraju via B4 Relay <devnull+sarath.ganapathiraju.oss.qualcomm.com@kernel.org>]

From: Sarath Ganapathiraju <sarath.ganapathiraju@oss.qualcomm.com>

Add Qualcomm LPASS VA CSR rate generator node that exposes
the lpass_heartbeat_pulse clock on hawi.

The HeartBeat Pulse (also known as RateGen Pulse) synchronizes the
start of the DMAs and Codec Interfaces for the audio usecase
and can serve as a periodic wakeup source for the DSP.

Signed-off-by: Sarath Ganapathiraju <sarath.ganapathiraju@oss.qualcomm.com>
---
 .../bindings/sound/qcom,lpass-va-csr.yaml          | 52 ++++++++++++++++++++++
 1 file changed, 52 insertions(+)

diff --git a/Documentation/devicetree/bindings/sound/qcom,lpass-va-csr.yaml b/Documentation/devicetree/bindings/sound/qcom,lpass-va-csr.yaml
new file mode 100644
index 0000000000..131debb04f
--- /dev/null
+++ b/Documentation/devicetree/bindings/sound/qcom,lpass-va-csr.yaml
@@ -0,0 +1,52 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/sound/qcom,lpass-va-csr.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Qualcomm LPASS VA CSR heartbeat pulse clock provider
+
+maintainers:
+  - Srinivas Kandagatla <srinivas.kandagatla@oss.qualcomm.com>
+  - Sarath Ganapathiraju <sarath.ganapathiraju@oss.qualcomm.com>
+
+description:
+  The LPASS VA CSR block contains the rate generator hardware which
+  produces the heartbeatpulse consumed by the Bolero codec macros
+  (rx, tx, wsa, va). It is modelled as a clock provider
+  so consumers can reference it by name in their clocks list.
+
+properties:
+  compatible:
+    enum:
+      - qcom,hawi-lpass-va-csr
+
+  reg:
+    maxItems: 1
+    description: Must cover the full VA CSR block (base 0x7EE0000, size 0xE000).
+
+  "#clock-cells":
+    const: 0
+    description:
+      Single clock output "lpass_heartbeat_pulse". Consumers reference
+      it by clock-name "heartbeatpulse" in their clocks list.
+
+required:
+  - compatible
+  - reg
+  - "#clock-cells"
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    soc {
+      #address-cells = <2>;
+      #size-cells = <2>;
+
+      va-csr@7ee0000 {
+        compatible = "qcom,hawi-lpass-va-csr";
+        reg = <0x0 0x07ee0000 0x0 0xe000>;
+        #clock-cells = <0>;
+      };
+    };

-- 
2.34.1