dt-bindings: clock: ipq5424-apss-clk: Add ipq5424 apss clock controller

The CPU core in ipq5424 is clocked by a huayra PLL with RCG support.
The RCG and PLL have a separate register space from the GCC.
Also the L3 cache has a separate pll and needs to be scaled along
with the CPU.

Co-developed-by: Md Sadre Alam <quic_mdalam@quicinc.com>
Signed-off-by: Md Sadre Alam <quic_mdalam@quicinc.com>
Signed-off-by: Sricharan Ramabadhran <quic_srichara@quicinc.com>
[ Added interconnect related changes ]
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Varadarajan Narayanan <quic_varada@quicinc.com>
Link: https://lore.kernel.org/r/20250811090954.2854440-2-quic_varada@quicinc.com
Signed-off-by: Bjorn Andersson <andersson@kernel.org>

1 files changed, 55 insertions, 0 deletions

diff --git a/Documentation/devicetree/bindings/clock/qcom,ipq5424-apss-clk.yaml b/Documentation/devicetree/bindings/clock/qcom,ipq5424-apss-clk.yaml
new file mode 100644
index 000000000000..def739fa0a8c
--- /dev/null
+++ b/Documentation/devicetree/bindings/clock/qcom,ipq5424-apss-clk.yaml
@@ -0,0 +1,55 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/clock/qcom,ipq5424-apss-clk.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Qualcomm APSS IPQ5424 Clock Controller
+
+maintainers:
+  - Varadarajan Narayanan <quic_varada@quicinc.com>
+
+description:
+  The CPU core in ipq5424 is clocked by a huayra PLL with RCG support.
+  The RCG and PLL have a separate register space from the GCC.
+
+properties:
+  compatible:
+    enum:
+      - qcom,ipq5424-apss-clk
+
+  reg:
+    maxItems: 1
+
+  clocks:
+    items:
+      - description: Reference to the XO clock.
+      - description: Reference to the GPLL0 clock.
+
+  '#clock-cells':
+    const: 1
+
+  '#interconnect-cells':
+    const: 1
+
+required:
+  - compatible
+  - reg
+  - clocks
+  - '#clock-cells'
+  - '#interconnect-cells'
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/clock/qcom,ipq5424-gcc.h>
+
+    apss_clk: clock-controller@fa80000 {
+      compatible = "qcom,ipq5424-apss-clk";
+      reg = <0x0fa80000 0x20000>;
+      clocks = <&xo_board>,
+               <&gcc GPLL0>;
+      #clock-cells = <1>;
+      #interconnect-cells = <1>;
+    };