[PATCH v3 1/5] dt-bindings: soc: cix,sky1-system-control: add audss system control

[joakim.zhang at cixtech.com]

From: Joakim Zhang <joakim.zhang at cixtech.com>

The Cix Sky1 Audio Subsystem (AUDSS) groups audio-related clock, reset
and control registers in a dedicated CRU block. Software reset lines are
exposed on the syscon parent via #reset-cells, following the same model
as the existing Sky1 FCH and S5 system control bindings.

Add the cix,sky1-audss-system-control compatible to
cix,sky1-system-control.yaml for the MFD/syscon parent node, and define
AUDSS software reset indices in
include/dt-bindings/reset/cix,sky1-audss-system-control.h for I2S, HDA,
DMAC, mailbox, watchdog and timer blocks.

Signed-off-by: Joakim Zhang <joakim.zhang at cixtech.com>
---
 .../soc/cix/cix,sky1-system-control.yaml      | 52 +++++++++++++++++--
 .../reset/cix,sky1-audss-system-control.h     | 25 +++++++++
 2 files changed, 72 insertions(+), 5 deletions(-)
 create mode 100644 include/dt-bindings/reset/cix,sky1-audss-system-control.h

diff --git a/Documentation/devicetree/bindings/soc/cix/cix,sky1-system-control.yaml b/Documentation/devicetree/bindings/soc/cix/cix,sky1-system-control.yaml
index a01a515222c6..61d26a69fd44 100644
--- a/Documentation/devicetree/bindings/soc/cix/cix,sky1-system-control.yaml
+++ b/Documentation/devicetree/bindings/soc/cix/cix,sky1-system-control.yaml
@@ -15,11 +15,16 @@ description:
 
 properties:
   compatible:
-    items:
-      - enum:
-          - cix,sky1-system-control
-          - cix,sky1-s5-system-control
-      - const: syscon
+    oneOf:
+      - items:
+          - enum:
+              - cix,sky1-system-control
+              - cix,sky1-s5-system-control
+          - const: syscon
+      - items:
+          - const: cix,sky1-audss-system-control
+          - const: simple-mfd
+          - const: syscon
 
   reg:
     maxItems: 1
@@ -27,6 +32,28 @@ properties:
   '#reset-cells':
     const: 1
 
+  clock-controller:
+    type: object
+    properties:
+      compatible:
+        const: cix,sky1-audss-clock
+    required:
+      - compatible
+    additionalProperties: true
+
+allOf:
+  - if:
+      properties:
+        compatible:
+          contains:
+            const: cix,sky1-audss-system-control
+    then:
+      required:
+        - clock-controller
+    else:
+      properties:
+        clock-controller: false
+
 required:
   - compatible
   - reg
@@ -40,3 +67,18 @@ examples:
       reg = <0x4160000 0x100>;
       #reset-cells = <1>;
     };
+  - |
+    audss_syscon: system-controller at 7110000 {
+        compatible = "cix,sky1-audss-system-control", "simple-mfd", "syscon";
+        reg = <0x7110000 0x10000>;
+        #reset-cells = <1>;
+
+        clock-controller {
+            compatible = "cix,sky1-audss-clock";
+            power-domains = <&smc_devpd 0>;
+            #clock-cells = <1>;
+            clocks = <&scmi_clk 0>, <&scmi_clk 2>, <&scmi_clk 4>, <&scmi_clk 5>;
+            clock-names = "x8k", "x11k", "sys", "48m";
+            resets = <&s5_syscon 31>;
+        };
+    };
diff --git a/include/dt-bindings/reset/cix,sky1-audss-system-control.h b/include/dt-bindings/reset/cix,sky1-audss-system-control.h
new file mode 100644
index 000000000000..aabdce60b094
--- /dev/null
+++ b/include/dt-bindings/reset/cix,sky1-audss-system-control.h
@@ -0,0 +1,25 @@
+/* SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause */
+/*
+ * Copyright 2026 Cix Technology Group Co., Ltd.
+ */
+#ifndef DT_BINDING_RESET_CIX_SKY1_AUDSS_SYSTEM_CONTROL_H
+#define DT_BINDING_RESET_CIX_SKY1_AUDSS_SYSTEM_CONTROL_H
+
+#define AUDSS_I2S0_SW_RST	0
+#define AUDSS_I2S1_SW_RST	1
+#define AUDSS_I2S2_SW_RST	2
+#define AUDSS_I2S3_SW_RST	3
+#define AUDSS_I2S4_SW_RST	4
+#define AUDSS_I2S5_SW_RST	5
+#define AUDSS_I2S6_SW_RST	6
+#define AUDSS_I2S7_SW_RST	7
+#define AUDSS_I2S8_SW_RST	8
+#define AUDSS_I2S9_SW_RST	9
+#define AUDSS_WDT_SW_RST	10
+#define AUDSS_TIMER_SW_RST	11
+#define AUDSS_MB0_SW_RST	12
+#define AUDSS_MB1_SW_RST	13
+#define AUDSS_HDA_SW_RST	14
+#define AUDSS_DMAC_SW_RST	15
+
+#endif
-- 
2.50.1