dt-bindings: soc: cix: add sky1 audss cru controller

The Cix Sky1 Audio Subsystem (AUDSS) Clock and Reset Unit (CRU)
groups clock muxing, gating and block-level software reset control
in a single register block.

Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@oss.qualcomm.com>
Signed-off-by: Joakim Zhang <joakim.zhang@cixtech.com>
Signed-off-by: Brian Masney <bmasney@redhat.com>

Documentation/devicetree/bindings/soc/cix/cix,sky1-audss-cru.yaml

@@ -0,0 +1,92 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/soc/cix/cix,sky1-audss-cru.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Cix Sky1 audio subsystem clock and reset unit
+
+maintainers:
+  - Joakim Zhang <joakim.zhang@cixtech.com>
+
+description: |
+  The Cix Sky1 Audio Subsystem (AUDSS) Clock and Reset Unit (CRU) groups
+  audio-related clock muxing, gating and block-level software reset control
+  in a single register block.
+
+  A single device node exposes both the clock controller and software reset
+  lines. The clock driver registers as a platform driver; the reset controller
+  is registered by an auxiliary driver bound from the clock driver.
+
+  Four SoC-level reference clocks listed in clocks/clock-names feed the AUDSS
+  clock tree. Internal AUDSS clocks are exposed via #clock-cells; indices are
+  defined in include/dt-bindings/clock/cix,sky1-audss-cru.h.
+
+  Block-level software reset indices are exposed via #reset-cells; indices
+  are defined in include/dt-bindings/reset/cix,sky1-audss-cru.h.
+
+  The SoC syscon NoC (or bus) reset is described via resets. The audio
+  subsystem power domain is described via power-domains.
+
+properties:
+  compatible:
+    const: cix,sky1-audss-cru
+
+  reg:
+    maxItems: 1
+
+  '#clock-cells':
+    const: 1
+    description:
+      Clock indices are defined in include/dt-bindings/clock/cix,sky1-audss-cru.h.
+
+  '#reset-cells':
+    const: 1
+    description:
+      Reset indices are defined in include/dt-bindings/reset/cix,sky1-audss-cru.h.
+
+  clocks:
+    items:
+      - description: I2S parent clock for sampling rates multiple of 8kHz.
+      - description: I2S parent clock for sampling rates multiple of 11.025kHz.
+      - description: Clock feeding most devices in AUDSS (NOC, DSP, SRAM, HDA, DMAC, I2S, and mailbox).
+      - description: Clock feeding HDA, timer and watchdog, which is a dedicated 48 MHz clock.
+
+  clock-names:
+    items:
+      - const: x8k
+      - const: x11k
+      - const: sys
+      - const: 48m
+
+  power-domains:
+    maxItems: 1
+
+  resets:
+    maxItems: 1
+
+required:
+  - compatible
+  - reg
+  - '#clock-cells'
+  - '#reset-cells'
+  - clocks
+  - clock-names
+  - power-domains
+  - resets
+
+additionalProperties: false
+
+examples:
+  - |
+    audss_cru: clock-controller@7110000 {
+        compatible = "cix,sky1-audss-cru";
+        reg = <0x7110000 0x10000>;
+        #clock-cells = <1>;
+        #reset-cells = <1>;
+        clocks = <&scmi_clk 76>, <&scmi_clk 78>,
+                 <&scmi_clk 70>, <&scmi_clk 71>;
+        clock-names = "x8k", "x11k", "sys", "48m";
+        power-domains = <&smc_devpd 0>;
+        resets = <&s5_syscon 31>;
+    };

include/dt-bindings/clock/cix,sky1-audss-cru.h

@@ -0,0 +1,60 @@
+/* SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) */
+/*
+ * Copyright 2026 Cix Technology Group Co., Ltd.
+ */
+
+#ifndef _DT_BINDINGS_CLOCK_CIX_SKY1_AUDSS_CRU_H
+#define _DT_BINDINGS_CLOCK_CIX_SKY1_AUDSS_CRU_H
+
+#define CLK_AUD_CLK4_DIV2	0
+#define CLK_AUD_CLK4_DIV4	1
+#define CLK_AUD_CLK5_DIV2	2
+
+#define CLK_DSP_CLK		3
+#define CLK_DSP_BCLK		4
+#define CLK_DSP_PBCLK		5
+
+#define CLK_SRAM_AXI		6
+
+#define CLK_HDA_SYS		7
+#define CLK_HDA_HDA		8
+
+#define CLK_DMAC_AXI		9
+
+#define CLK_WDG_APB		10
+#define CLK_WDG_WDG		11
+
+#define CLK_TIMER_APB		12
+#define CLK_TIMER_TIMER		13
+
+#define CLK_MB_0_APB		14	/* MB0: ap->dsp */
+#define CLK_MB_1_APB		15	/* MB1: dsp->ap */
+
+#define CLK_I2S0_APB		16
+#define CLK_I2S1_APB		17
+#define CLK_I2S2_APB		18
+#define CLK_I2S3_APB		19
+#define CLK_I2S4_APB		20
+#define CLK_I2S5_APB		21
+#define CLK_I2S6_APB		22
+#define CLK_I2S7_APB		23
+#define CLK_I2S8_APB		24
+#define CLK_I2S9_APB		25
+#define CLK_I2S0		26
+#define CLK_I2S1		27
+#define CLK_I2S2		28
+#define CLK_I2S3		29
+#define CLK_I2S4		30
+#define CLK_I2S5		31
+#define CLK_I2S6		32
+#define CLK_I2S7		33
+#define CLK_I2S8		34
+#define CLK_I2S9		35
+
+#define CLK_MCLK0		36
+#define CLK_MCLK1		37
+#define CLK_MCLK2		38
+#define CLK_MCLK3		39
+#define CLK_MCLK4		40
+
+#endif

include/dt-bindings/reset/cix,sky1-audss-cru.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_BINDINGS_RESET_CIX_SKY1_AUDSS_CRU_H
+#define DT_BINDINGS_RESET_CIX_SKY1_AUDSS_CRU_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