[PATCH v4 0/5] Add Cix Sky1 AUDSS clock and reset support

[PATCH v4 0/5] Add Cix Sky1 AUDSS clock and reset support

[joakim.zhang]

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

This patch set adds the clock and reset support for AUDSS. The AUDSS
groups audio-related peripherals (HDA, I2S, DSP, DMA, mailboxes,
watchdog, timer, etc.) behind a single Clock and Reset Unit (CRU)
register block.

Clock and reset changes normally belong to separate subsystems and would
ideally be submitted as independent series. They are combined here because
the AUDSS DT bindings cross-reference each other: the system-control
binding describes the clock child node, the clock binding documents
reset lines exposed on the parent syscon, and the DTS example wires both
together. Keeping clock and reset in one series gives reviewers the full
picture when evaluating the binding layout, dependencies, and
integration.

Patches apply in the following order:

  1. Reset support
     - dt-bindings: soc: cix,sky1-system-control: add audss system control
     - reset: cix: add audss support to sky1 reset driver

  2. Clock support
     - dt-bindings: clock: cix,sky1-audss-clock: add audss clock controller
     - clk: cix: add sky1 audss clock controller

  3. Device tree
     - arm64: dts: cix: sky1: add audss system control

The reset and clock parts have each been build-tested and checked with
dt_binding_check independently. If reviewers prefer separate series for
the reset and clock maintainers, I can split and resubmit after this
round of review once the overall design is agreed on.

---
ChangeLogs:
v3->v4:
  * move both power domain and resets into parset node (audss_cru)
  * remove "simple-mfd", and change to populate the child node
  * cix,sky1-audss.h -> cix,sky1-audss-clock.h 

v2->v3:
  * clk part:
    * devm_reset_control_get()->devm_reset_control_get_exclusive()
    * assert noc reset from suspend
    * clock parents changes from 6 to 4, and rename the clock names,
      explain more about this: confirm with our designer, In fact,
      there are 6 clock sources going into the audio subsystem. audio_clk1
      and audio_clk3 are redundant in design and are not actually needed
      in practice, so they are not shown here.
    * refine clocks and clock-names property
    * add detailed description of clocks
    * drop parent node from clk binding
    * drop define AUDSS_MAX_CLKS
  * reset part:
    * rename reset signal macro, remove _N
    * drop SKY1_AUDSS_SW_RESET_NUM
    * switching to compatible-style of defining subnodes in parent schema

v1->v2:
  * remove audss_rst device node since it doesn't has resource, and
    move to reset-sky1.c driver.
  * remove hda related which would be sent after this patch set accepted
  * soc componnet is okay by default from dtsi
  * fix for audss clk driver:
    * remove "comment "Clock options for Cixtech audss:""
    * add select MFD_SYSCON
    * move lock and clk_data into struct sky1_audss_clks_priv
    * const char *name -> const char * const * name
    * remove CLK_GET_RATE_NOCACHE
    * divicer -> divider
    * Reverse Christmas tree order
    * return reg ? 1 : 0; -> return !!reg;
    * return ERR_CAST(hw); -> return hw;
    * of_device_get_match_data(dev) -> device_get_match_data()
    * add lock from runtime_suspend/resume
  * loop to more mailing lists

Joakim Zhang (5):
  dt-bindings: soc: cix,sky1-system-control: add audss system control
  reset: cix: add audss support to sky1 reset driver
  dt-bindings: clock: cix,sky1-audss-clock: add audss clock controller
  clk: cix: add sky1 audss clock controller
  arm64: dts: cix: sky1: add audss system control

 .../bindings/clock/cix,sky1-audss-clock.yaml  |   72 +
 .../soc/cix/cix,sky1-system-control.yaml      |   48 +
 arch/arm64/boot/dts/cix/sky1.dtsi             |   24 +
 drivers/clk/Kconfig                           |    1 +
 drivers/clk/Makefile                          |    1 +
 drivers/clk/cix/Kconfig                       |   16 +
 drivers/clk/cix/Makefile                      |    3 +
 drivers/clk/cix/clk-sky1-audss.c              | 1167 +++++++++++++++++
 drivers/reset/reset-sky1.c                    |   86 +-
 .../dt-bindings/clock/cix,sky1-audss-clock.h  |   60 +
 .../reset/cix,sky1-audss-system-control.h     |   25 +
 11 files changed, 1500 insertions(+), 3 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/clock/cix,sky1-audss-clock.yaml
 create mode 100644 drivers/clk/cix/Kconfig
 create mode 100644 drivers/clk/cix/Makefile
 create mode 100644 drivers/clk/cix/clk-sky1-audss.c
 create mode 100644 include/dt-bindings/clock/cix,sky1-audss-clock.h
 create mode 100644 include/dt-bindings/reset/cix,sky1-audss-system-control.h

-- 
2.50.1

[PATCH v4 1/5] dt-bindings: soc: cix,sky1-system-control: add audss system control

[joakim.zhang]

From: Joakim Zhang <joakim.zhang@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.

A clock-controller child node is required under the audss syscon. It has
no reg property of its own and accesses the parent register block for mux,
divider and gate fields.

The AUDSS is also controlled by one power domain and reset part.

Signed-off-by: Joakim Zhang <joakim.zhang@cixtech.com>
---
 .../soc/cix/cix,sky1-system-control.yaml      | 48 +++++++++++++++++++
 .../reset/cix,sky1-audss-system-control.h     | 25 ++++++++++
 2 files changed, 73 insertions(+)
 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..5a1cd5c24ade 100644
--- a/Documentation/devicetree/bindings/soc/cix/cix,sky1-system-control.yaml
+++ b/Documentation/devicetree/bindings/soc/cix/cix,sky1-system-control.yaml
@@ -19,6 +19,7 @@ properties:
       - enum:
           - cix,sky1-system-control
           - cix,sky1-s5-system-control
+          - cix,sky1-audss-system-control
       - const: syscon
 
   reg:
@@ -27,6 +28,38 @@ properties:
   '#reset-cells':
     const: 1
 
+  power-domains:
+    maxItems: 1
+
+  resets:
+    maxItems: 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
+        - power-domains
+        - resets
+    else:
+      properties:
+        clock-controller: false
+        power-domains: false
+        resets: false
+
 required:
   - compatible
   - reg
@@ -40,3 +73,18 @@ examples:
       reg = <0x4160000 0x100>;
       #reset-cells = <1>;
     };
+  - |
+    audss_syscon: system-controller@7110000 {
+        compatible = "cix,sky1-audss-system-control", "syscon";
+        reg = <0x7110000 0x10000>;
+        power-domains = <&smc_devpd 0>;
+        resets = <&s5_syscon 31>;
+        #reset-cells = <1>;
+
+        clock-controller {
+            compatible = "cix,sky1-audss-clock";
+            #clock-cells = <1>;
+            clocks = <&scmi_clk 0>, <&scmi_clk 2>, <&scmi_clk 4>, <&scmi_clk 5>;
+            clock-names = "x8k", "x11k", "sys", "48m";
+        };
+    };
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

[PATCH v4 2/5] reset: cix: add audss support to sky1 reset driver

[joakim.zhang]

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

Extend the Sky1 reset controller driver for the AUDSS CRU syscon. The
AUDSS block provides sixteen active-low software reset bits in one
register for audio subsystem peripherals, reusing the existing
regmap-based reset ops used by the FCH and S5 system control variants.

Signed-off-by: Joakim Zhang <joakim.zhang@cixtech.com>
---
 drivers/reset/reset-sky1.c | 86 ++++++++++++++++++++++++++++++++++++--
 1 file changed, 83 insertions(+), 3 deletions(-)

diff --git a/drivers/reset/reset-sky1.c b/drivers/reset/reset-sky1.c
index 78e80a533c39..462501c2ea06 100644
--- a/drivers/reset/reset-sky1.c
+++ b/drivers/reset/reset-sky1.c
@@ -10,12 +10,16 @@
 #include <linux/mfd/syscon.h>
 #include <linux/module.h>
 #include <linux/of.h>
+#include <linux/of_platform.h>
 #include <linux/platform_device.h>
+#include <linux/pm_runtime.h>
 #include <linux/regmap.h>
+#include <linux/reset.h>
 #include <linux/reset-controller.h>
 
 #include <dt-bindings/reset/cix,sky1-system-control.h>
 #include <dt-bindings/reset/cix,sky1-s5-system-control.h>
+#include <dt-bindings/reset/cix,sky1-audss-system-control.h>
 
 #define SKY1_RESET_SLEEP_MIN_US		50
 #define SKY1_RESET_SLEEP_MAX_US		100
@@ -34,6 +38,7 @@ struct sky1_src {
 	struct reset_controller_dev rcdev;
 	const struct sky1_src_signal *signals;
 	struct regmap *regmap;
+	struct reset_control *rst_noc;
 };
 
 enum {
@@ -258,6 +263,34 @@ static const struct sky1_src_variant variant_sky1_fch = {
 	.signals_num = ARRAY_SIZE(sky1_src_fch_signals),
 };
 
+enum {
+	AUDSS_SW_RST = 0x78,
+};
+
+static const struct sky1_src_signal sky1_audss_signals[] = {
+	[AUDSS_I2S0_SW_RST]   = { AUDSS_SW_RST, BIT(0) },
+	[AUDSS_I2S1_SW_RST]   = { AUDSS_SW_RST, BIT(1) },
+	[AUDSS_I2S2_SW_RST]   = { AUDSS_SW_RST, BIT(2) },
+	[AUDSS_I2S3_SW_RST]   = { AUDSS_SW_RST, BIT(3) },
+	[AUDSS_I2S4_SW_RST]   = { AUDSS_SW_RST, BIT(4) },
+	[AUDSS_I2S5_SW_RST]   = { AUDSS_SW_RST, BIT(5) },
+	[AUDSS_I2S6_SW_RST]   = { AUDSS_SW_RST, BIT(6) },
+	[AUDSS_I2S7_SW_RST]   = { AUDSS_SW_RST, BIT(7) },
+	[AUDSS_I2S8_SW_RST]   = { AUDSS_SW_RST, BIT(8) },
+	[AUDSS_I2S9_SW_RST]   = { AUDSS_SW_RST, BIT(9) },
+	[AUDSS_WDT_SW_RST]    = { AUDSS_SW_RST, BIT(10) },
+	[AUDSS_TIMER_SW_RST]  = { AUDSS_SW_RST, BIT(11) },
+	[AUDSS_MB0_SW_RST]    = { AUDSS_SW_RST, BIT(12) },
+	[AUDSS_MB1_SW_RST]    = { AUDSS_SW_RST, BIT(13) },
+	[AUDSS_HDA_SW_RST]    = { AUDSS_SW_RST, BIT(14) },
+	[AUDSS_DMAC_SW_RST]   = { AUDSS_SW_RST, BIT(15) },
+};
+
+static const struct sky1_src_variant variant_sky1_audss = {
+	.signals = sky1_audss_signals,
+	.signals_num = ARRAY_SIZE(sky1_audss_signals),
+};
+
 static struct sky1_src *to_sky1_src(struct reset_controller_dev *rcdev)
 {
 	return container_of(rcdev, struct sky1_src, rcdev);
@@ -318,17 +351,34 @@ static const struct reset_control_ops sky1_src_ops = {
 	.status   = sky1_reset_status
 };
 
+static int __maybe_unused sky1_reset_runtime_suspend(struct device *dev)
+{
+	struct sky1_src *sky1src = dev_get_drvdata(dev);
+
+	return reset_control_assert(sky1src->rst_noc);
+}
+
+static int __maybe_unused sky1_reset_runtime_resume(struct device *dev)
+{
+	struct sky1_src *sky1src = dev_get_drvdata(dev);
+
+	return reset_control_deassert(sky1src->rst_noc);
+}
+
 static int sky1_reset_probe(struct platform_device *pdev)
 {
 	struct sky1_src *sky1src;
 	struct device *dev = &pdev->dev;
 	const struct sky1_src_variant *variant;
+	int ret;
 
 	sky1src = devm_kzalloc(dev, sizeof(*sky1src), GFP_KERNEL);
 	if (!sky1src)
 		return -ENOMEM;
 
 	variant = of_device_get_match_data(dev);
+	if (!variant)
+		return -ENODEV;
 
 	sky1src->regmap = device_node_to_regmap(dev->of_node);
 	if (IS_ERR(sky1src->regmap)) {
@@ -343,12 +393,36 @@ static int sky1_reset_probe(struct platform_device *pdev)
 	sky1src->rcdev.of_node   = dev->of_node;
 	sky1src->rcdev.dev       = dev;
 
-	return devm_reset_controller_register(dev, &sky1src->rcdev);
+	ret = devm_reset_controller_register(dev, &sky1src->rcdev);
+	if (ret)
+		return ret;
+
+	platform_set_drvdata(pdev, sky1src);
+
+	if (of_device_is_compatible(dev->of_node, "cix,sky1-audss-system-control")) {
+		sky1src->rst_noc = devm_reset_control_get_exclusive(dev, NULL);
+		if (IS_ERR(sky1src->rst_noc))
+			return dev_err_probe(dev, PTR_ERR(sky1src->rst_noc),
+					     "failed to get audss noc reset");
+
+		pm_runtime_get_noresume(dev);
+		pm_runtime_set_active(dev);
+		devm_pm_runtime_enable(dev);
+
+		reset_control_deassert(sky1src->rst_noc);
+
+		ret = devm_of_platform_populate(dev);
+		pm_runtime_put(dev);
+		return ret;
+	}
+
+	return 0;
 }
 
 static const struct of_device_id sky1_sysreg_of_match[] = {
-	{ .compatible = "cix,sky1-system-control", .data = &variant_sky1_fch},
-	{ .compatible = "cix,sky1-s5-system-control", .data = &variant_sky1},
+	{ .compatible = "cix,sky1-system-control", .data = &variant_sky1_fch },
+	{ .compatible = "cix,sky1-s5-system-control", .data = &variant_sky1 },
+	{ .compatible = "cix,sky1-audss-system-control", .data = &variant_sky1_audss },
 	{},
 };
 MODULE_DEVICE_TABLE(of, sky1_sysreg_of_match);
@@ -358,6 +432,12 @@ static struct platform_driver sky1_reset_driver = {
 	.driver = {
 		.name		= "cix,sky1-rst",
 		.of_match_table = sky1_sysreg_of_match,
+		.pm		= &(const struct dev_pm_ops){
+			SET_RUNTIME_PM_OPS(sky1_reset_runtime_suspend,
+					   sky1_reset_runtime_resume, NULL)
+			SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
+						pm_runtime_force_resume)
+		},
 	},
 };
 module_platform_driver(sky1_reset_driver)
-- 
2.50.1

[PATCH v4 3/5] dt-bindings: clock: cix,sky1-audss-clock: add audss clock controller

[joakim.zhang]

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

The AUDSS CRU contains an internal clock tree of muxes, dividers and
gates for DSP, I2S, HDA, DMAC and related blocks. The clock provider is
a child node of the cix,sky1-audss-system-control syscon and accesses
registers through the parent MMIO region.

Signed-off-by: Joakim Zhang <joakim.zhang@cixtech.com>
---
 .../bindings/clock/cix,sky1-audss-clock.yaml  | 72 +++++++++++++++++++
 .../dt-bindings/clock/cix,sky1-audss-clock.h  | 60 ++++++++++++++++
 2 files changed, 132 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/clock/cix,sky1-audss-clock.yaml
 create mode 100644 include/dt-bindings/clock/cix,sky1-audss-clock.h

diff --git a/Documentation/devicetree/bindings/clock/cix,sky1-audss-clock.yaml b/Documentation/devicetree/bindings/clock/cix,sky1-audss-clock.yaml
new file mode 100644
index 000000000000..ea813c5a2307
--- /dev/null
+++ b/Documentation/devicetree/bindings/clock/cix,sky1-audss-clock.yaml
@@ -0,0 +1,72 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/clock/cix,sky1-audss-clock.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Cix Sky1 audio subsystem clock controller
+
+maintainers:
+  - Joakim Zhang <joakim.zhang@cixtech.com>
+
+description: |
+  Clock provider for the Cix Sky1 audio subsystem (AUDSS).
+
+  This node is a child of a cix,sky1-audss-system-control syscon node
+  (see cix,sky1-system-control.yaml). It does not have a reg property; clock
+  mux, divider and gate fields are accessed through the parent register block.
+
+  Software reset lines for AUDSS blocks are exposed on the parent syscon via
+  #reset-cells (provider). Reset indices are defined in
+  include/dt-bindings/reset/cix,sky1-audss-system-control.h.
+
+  Four SoC-level reference clocks listed in clocks/clock-names feed the AUDSS
+  clock tree. The provider exposes the internal AUDSS clocks to other devices
+  via #clock-cells; indices are defined in cix,sky1-audss-clock.h.
+
+  The parent cix,sky1-audss-system-control node describes the SoC syscon
+  NoC (or bus) reset via resets and the audio subsystem power domain via
+  power-domains.
+
+properties:
+  compatible:
+    const: cix,sky1-audss-clock
+
+  '#clock-cells':
+    const: 1
+    description:
+      Clock indices are defined in include/dt-bindings/clock/cix,sky1-audss-clock.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 for HDA, Timer and Watchdog, which is a delicated 48MHz clock.
+
+  clock-names:
+    items:
+      - const: x8k
+      - const: x11k
+      - const: sys
+      - const: 48m
+
+required:
+  - compatible
+  - '#clock-cells'
+  - clocks
+  - clock-names
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/clock/cix,sky1.h>
+
+    clock-controller {
+        compatible = "cix,sky1-audss-clock";
+        #clock-cells = <1>;
+        clocks = <&scmi_clk CLK_TREE_AUDIO_CLK0>, <&scmi_clk CLK_TREE_AUDIO_CLK2>,
+                 <&scmi_clk CLK_TREE_AUDIO_CLK4>, <&scmi_clk CLK_TREE_AUDIO_CLK5>;
+        clock-names = "x8k", "x11k", "sys", "48m";
+    };
diff --git a/include/dt-bindings/clock/cix,sky1-audss-clock.h b/include/dt-bindings/clock/cix,sky1-audss-clock.h
new file mode 100644
index 000000000000..7e9bd3e6c7a1
--- /dev/null
+++ b/include/dt-bindings/clock/cix,sky1-audss-clock.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_CLK_CIX_SKY1_AUDSS_CLOCK_H
+#define _DT_BINDINGS_CLK_CIX_SKY1_AUDSS_CLOCK_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
-- 
2.50.1

[PATCH v4 4/5] clk: cix: add sky1 audss clock controller

[joakim.zhang]

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

Add a platform driver for the Cix Sky1 Audio Subsystem (AUDSS) internal
clock controller. The driver binds to a cix,sky1-audss-clock device tree
node under the AUDSS syscon, obtains the parent regmap via
syscon_node_to_regmap(), and registers mux/divider/gate composite clocks
for DSP, SRAM, HDA, DMAC, watchdog, timer, mailbox and I2S outputs. Four
SoC-level audio reference clocks are brought up as inputs to the tree.

Signed-off-by: Joakim Zhang <joakim.zhang@cixtech.com>
---
 drivers/clk/Kconfig              |    1 +
 drivers/clk/Makefile             |    1 +
 drivers/clk/cix/Kconfig          |   16 +
 drivers/clk/cix/Makefile         |    3 +
 drivers/clk/cix/clk-sky1-audss.c | 1167 ++++++++++++++++++++++++++++++
 5 files changed, 1188 insertions(+)
 create mode 100644 drivers/clk/cix/Kconfig
 create mode 100644 drivers/clk/cix/Makefile
 create mode 100644 drivers/clk/cix/clk-sky1-audss.c

diff --git a/drivers/clk/Kconfig b/drivers/clk/Kconfig
index 1717ce75a907..cfcaab39068a 100644
--- a/drivers/clk/Kconfig
+++ b/drivers/clk/Kconfig
@@ -509,6 +509,7 @@ source "drivers/clk/actions/Kconfig"
 source "drivers/clk/analogbits/Kconfig"
 source "drivers/clk/aspeed/Kconfig"
 source "drivers/clk/bcm/Kconfig"
+source "drivers/clk/cix/Kconfig"
 source "drivers/clk/eswin/Kconfig"
 source "drivers/clk/hisilicon/Kconfig"
 source "drivers/clk/imgtec/Kconfig"
diff --git a/drivers/clk/Makefile b/drivers/clk/Makefile
index cc108a75a900..87c992f0df54 100644
--- a/drivers/clk/Makefile
+++ b/drivers/clk/Makefile
@@ -119,6 +119,7 @@ obj-$(CONFIG_ARCH_ARTPEC)		+= axis/
 obj-$(CONFIG_ARC_PLAT_AXS10X)		+= axs10x/
 obj-y					+= bcm/
 obj-$(CONFIG_ARCH_BERLIN)		+= berlin/
+obj-y					+= cix/
 obj-$(CONFIG_ARCH_DAVINCI)		+= davinci/
 obj-$(CONFIG_COMMON_CLK_ESWIN)		+= eswin/
 obj-$(CONFIG_ARCH_HISI)			+= hisilicon/
diff --git a/drivers/clk/cix/Kconfig b/drivers/clk/cix/Kconfig
new file mode 100644
index 000000000000..3909796f8656
--- /dev/null
+++ b/drivers/clk/cix/Kconfig
@@ -0,0 +1,16 @@
+# SPDX-License-Identifier: GPL-2.0
+# Audio subsystem clock support for Cixtech SoC family
+menu "Clock support for Cixtech audss"
+
+config CLK_SKY1_AUDSS
+	tristate "Cixtech Sky1 Audio Subsystem Clock Driver"
+	depends on ARCH_CIX || COMPILE_TEST
+	select MFD_SYSCON
+	select REGMAP_MMIO
+	select RESET_CONTROLLER
+	help
+	  Support for the Audio Subsystem clock controller present on
+	  Cixtech Sky1 SoC. This driver provides mux, divider and gate
+	  clocks for DSP, I2S, HDA and related blocks in the audio
+	  subsystem. Say M or Y here if you want to build this driver.
+endmenu
diff --git a/drivers/clk/cix/Makefile b/drivers/clk/cix/Makefile
new file mode 100644
index 000000000000..bc612f1d08b2
--- /dev/null
+++ b/drivers/clk/cix/Makefile
@@ -0,0 +1,3 @@
+# SPDX-License-Identifier: GPL-2.0
+
+obj-$(CONFIG_CLK_SKY1_AUDSS) += clk-sky1-audss.o
diff --git a/drivers/clk/cix/clk-sky1-audss.c b/drivers/clk/cix/clk-sky1-audss.c
new file mode 100644
index 000000000000..c1e7dfe45d12
--- /dev/null
+++ b/drivers/clk/cix/clk-sky1-audss.c
@@ -0,0 +1,1167 @@
+// SPDX-License-Identifier: GPL-2.0-only
+// Copyright 2026 Cix Technology Group Co., Ltd.
+
+#include <linux/clk.h>
+#include <linux/clk-provider.h>
+#include <linux/device.h>
+#include <linux/mfd/syscon.h>
+#include <linux/module.h>
+#include <linux/of_device.h>
+#include <linux/platform_device.h>
+#include <linux/pm_runtime.h>
+#include <linux/regmap.h>
+
+#include <dt-bindings/clock/cix,sky1-audss-clock.h>
+
+#define INFO_HIFI0				0x00
+#define INFO_CLK_GATE				0x10
+#define INFO_CLK_DIV				0x14
+#define INFO_CLK_MUX				0x18
+#define INFO_MCLK				0x70
+
+#define SKY1_AUDSS_CLK_PARENTS_CNT		4
+#define SKY1_AUDSS_NUM_CLKS			(CLK_MCLK4 + 1)
+
+static u32 sky1_reg_save[][2] = {
+	{ INFO_HIFI0,  0 },
+	{ INFO_CLK_GATE,  0 },
+	{ INFO_CLK_DIV, 0 },
+	{ INFO_CLK_MUX, 0 },
+	{ INFO_MCLK, 0 },
+};
+
+static const char * const sky1_audss_clk_names[SKY1_AUDSS_CLK_PARENTS_CNT] = {
+	"x8k", "x11k", "sys", "48m",
+};
+
+static const u32 sky1_clk_rate_default[SKY1_AUDSS_CLK_PARENTS_CNT] = {
+	294912000,
+	270950400,
+	800000000,
+	48000000,
+};
+
+static const char * const dsp_clk_parent[] = {
+	"audio_clk4"
+};
+
+static const char * const dsp_bclk_parent[] = {
+	"audio_clk4_div2"
+};
+
+static const char * const dsp_pbclk_parent[] = {
+	"audio_clk4_div4"
+};
+
+static const char * const sram_axi_parent[] = {
+	"audio_clk4_div2"
+};
+
+static const char * const hda_sys_parent[] = {
+	"audio_clk4_div2"
+};
+
+static const char * const hda_hda_parent[] = {
+	"audio_clk5"
+};
+
+static const char * const dmac_axi_parent[] = {
+	"audio_clk4_div2"
+};
+
+static const char * const wdg_apb_parent[] = {
+	"audio_clk5_div2"
+};
+
+static const char * const wdg_wdg_parent[] = {
+	"audio_clk5_div2"
+};
+
+static const char * const timer_apb_parent[] = {
+	"audio_clk4_div4"
+};
+
+static const char * const timer_timer_parent[] = {
+	"audio_clk5_div2"
+};
+
+static const char * const mailbox_apb_parent[] = {
+	"audio_clk4_div4"
+};
+
+static const char * const i2s_apb_parent[] = {
+	"audio_clk4_div4"
+};
+
+static const char * const i2s0_parents[] = {
+	"audio_clk0", "audio_clk2"
+};
+
+static const char * const i2s1_parents[] = {
+	"audio_clk0", "audio_clk2"
+};
+
+static const char * const i2s2_parents[] = {
+	"audio_clk0", "audio_clk2"
+};
+
+static const char * const i2s3_parents[] = {
+	"audio_clk0", "audio_clk2"
+};
+
+static const char * const i2s4_parents[] = {
+	"audio_clk0", "audio_clk2"
+};
+
+static const char * const i2s5_parents[] = {
+	"audio_clk0", "audio_clk2"
+};
+
+static const char * const i2s6_parents[] = {
+	"audio_clk0", "audio_clk2"
+};
+
+static const char * const i2s7_parents[] = {
+	"audio_clk0", "audio_clk2"
+};
+
+static const char * const i2s8_parents[] = {
+	"audio_clk0", "audio_clk2"
+};
+
+static const char * const i2s9_parents[] = {
+	"audio_clk0", "audio_clk2"
+};
+
+static const char * const mclk_parents[] = {
+	"audio_clk0", "audio_clk2"
+};
+
+static const u32 i2s3_mux_table[] = { 0, 2 };
+static const u32 i2s4_mux_table[] = { 0, 2 };
+
+/*
+ * audss composite clock definition
+ */
+struct muxdiv_cfg {
+	int offset;
+	u8 shift;
+	u8 width;
+	u8 flags;
+};
+
+struct gate_cfg {
+	int offset;
+	u8 shift;
+	u8 flags;
+};
+
+struct composite_clk_cfg {
+	u32 id;
+	const char * const name;
+	const char * const *parent_names;
+	int num_parents;
+	const u32 *mux_table;
+	struct muxdiv_cfg *mux_cfg;
+	struct muxdiv_cfg *div_cfg;
+	struct gate_cfg *gate_cfg;
+	unsigned long flags;
+};
+
+#define CFG(_id,\
+	    _name,\
+	    _parent_names,\
+	    _mux_table,\
+	    _mux_offset, _mux_shift, _mux_width, _mux_flags,\
+	    _div_offset, _div_shift, _div_width, _div_flags,\
+	    _gate_offset, _gate_shift, _gate_flags,\
+	    _flags)\
+{\
+	.id = _id,\
+	.name = _name,\
+	.parent_names = _parent_names,\
+	.num_parents = ARRAY_SIZE(_parent_names),\
+	.mux_table = _mux_table,\
+	.mux_cfg = &(struct muxdiv_cfg) { _mux_offset, _mux_shift, _mux_width, _mux_flags },\
+	.div_cfg = &(struct muxdiv_cfg) { _div_offset, _div_shift, _div_width, _div_flags },\
+	.gate_cfg = &(struct gate_cfg) { _gate_offset, _gate_shift, _gate_flags },\
+	.flags = _flags,\
+}
+
+static const struct composite_clk_cfg sky1_audss_clks[] = {
+	/* dsp */
+	CFG(CLK_DSP_CLK,
+	    "audss_dsp_clk",
+	    dsp_clk_parent,
+	    NULL,
+	    -1, 0, 0, 0,
+	    INFO_CLK_DIV, 0, 2, 0,
+	    INFO_HIFI0, 0, 0,
+	    0),
+	CFG(CLK_DSP_BCLK,
+	    "audss_dsp_bclk",
+	    dsp_bclk_parent,
+	    NULL,
+	    -1, 0, 0, 0,
+	    INFO_CLK_DIV, 0, 2, 0,
+	    -1, 0, 0,
+	    0),
+	CFG(CLK_DSP_PBCLK,
+	    "audss_dsp_pbclk",
+	    dsp_pbclk_parent,
+	    NULL,
+	    -1, 0, 0, 0,
+	    INFO_CLK_DIV, 0, 2, 0,
+	    -1, 0, 0,
+	    0),
+	/* sram */
+	CFG(CLK_SRAM_AXI,
+	    "audss_sram_axi",
+	    sram_axi_parent,
+	    NULL,
+	    -1, 0, 0, 0,
+	    INFO_CLK_DIV, 0, 2, 0,
+	    INFO_CLK_GATE, 16, 0,
+	    0),
+	/* hda */
+	CFG(CLK_HDA_SYS,
+	    "audss_hda_sys",
+	    hda_sys_parent,
+	    NULL,
+	    -1, 0, 0, 0,
+	    INFO_CLK_DIV, 0, 2, 0,
+	    INFO_CLK_GATE, 14, 0,
+	    0),
+	CFG(CLK_HDA_HDA,
+	    "audss_hda_hda",
+	    hda_hda_parent,
+	    NULL,
+	    -1, 0, 0, 0,
+	    -1, 0, 0, 0,
+	    INFO_CLK_GATE, 14, 0,
+	    0),
+	/* dmac */
+	CFG(CLK_DMAC_AXI,
+	    "audss_dmac_axi",
+	    dmac_axi_parent,
+	    NULL,
+	    -1, 0, 0, 0,
+	    INFO_CLK_DIV, 0, 2, 0,
+	    INFO_CLK_GATE, 15, 0,
+	    0),
+	/* wdg */
+	CFG(CLK_WDG_APB,
+	    "audss_wdg_apb",
+	    wdg_apb_parent,
+	    NULL,
+	    -1, 0, 0, 0,
+	    -1, 0, 0, 0,
+	    INFO_CLK_GATE, 10, 0,
+	    0),
+	CFG(CLK_WDG_WDG,
+	    "audss_wdg_wdg",
+	    wdg_wdg_parent,
+	    NULL,
+	    -1, 0, 0, 0,
+	    -1, 0, 0, 0,
+	    INFO_CLK_GATE, 10, 0,
+	    0),
+	/* timer */
+	CFG(CLK_TIMER_APB,
+	    "audss_timer_apb",
+	    timer_apb_parent,
+	    NULL,
+	    -1, 0, 0, 0,
+	    INFO_CLK_DIV, 0, 2, 0,
+	    INFO_CLK_GATE, 11, 0,
+	    0),
+	CFG(CLK_TIMER_TIMER,
+	    "audss_timer_timer",
+	    timer_timer_parent,
+	    NULL,
+	    -1, 0, 0, 0,
+	    -1, 0, 0, 0,
+	    INFO_CLK_GATE, 11, 0,
+	    0),
+	/* mailbox: mb0(ap->dsp), mb1(dsp->ap) */
+	CFG(CLK_MB_0_APB,
+	    "audss_mb_0_apb",
+	    mailbox_apb_parent,
+	    NULL,
+	    -1, 0, 0, 0,
+	    -1, 0, 0, 0,
+	    INFO_CLK_GATE, 12, 0,
+	    0),
+	CFG(CLK_MB_1_APB,
+	    "audss_mb_1_apb",
+	    mailbox_apb_parent,
+	    NULL,
+	    -1, 0, 0, 0,
+	    -1, 0, 0, 0,
+	    INFO_CLK_GATE, 13, 0,
+	    0),
+	/* i2s */
+	CFG(CLK_I2S0_APB,
+	    "audss_i2s0_apb",
+	    i2s_apb_parent,
+	    NULL,
+	    -1, 0, 0, 0,
+	    INFO_CLK_DIV, 0, 2, 0,
+	    INFO_CLK_GATE, 0, 0,
+	    0),
+	CFG(CLK_I2S1_APB,
+	    "audss_i2s1_apb",
+	    i2s_apb_parent,
+	    NULL,
+	    -1, 0, 0, 0,
+	    INFO_CLK_DIV, 0, 2, 0,
+	    INFO_CLK_GATE, 1, 0,
+	    0),
+	CFG(CLK_I2S2_APB,
+	    "audss_i2s2_apb",
+	    i2s_apb_parent,
+	    NULL,
+	    -1, 0, 0, 0,
+	    INFO_CLK_DIV, 0, 2, 0,
+	    INFO_CLK_GATE, 2, 0,
+	    0),
+	CFG(CLK_I2S3_APB,
+	    "audss_i2s3_apb",
+	    i2s_apb_parent,
+	    NULL,
+	    -1, 0, 0, 0,
+	    INFO_CLK_DIV, 0, 2, 0,
+	    INFO_CLK_GATE, 3, 0,
+	    0),
+	CFG(CLK_I2S4_APB,
+	    "audss_i2s4_apb",
+	    i2s_apb_parent,
+	    NULL,
+	    -1, 0, 0, 0,
+	    INFO_CLK_DIV, 0, 2, 0,
+	    INFO_CLK_GATE, 4, 0,
+	    0),
+	CFG(CLK_I2S5_APB,
+	    "audss_i2s5_apb",
+	    i2s_apb_parent,
+	    NULL,
+	    -1, 0, 0, 0,
+	    INFO_CLK_DIV, 0, 2, 0,
+	    INFO_CLK_GATE, 5, 0,
+	    0),
+	CFG(CLK_I2S6_APB,
+	    "audss_i2s6_apb",
+	    i2s_apb_parent,
+	    NULL,
+	    -1, 0, 0, 0,
+	    INFO_CLK_DIV, 0, 2, 0,
+	    INFO_CLK_GATE, 6, 0,
+	    0),
+	CFG(CLK_I2S7_APB,
+	    "audss_i2s7_apb",
+	    i2s_apb_parent,
+	    NULL,
+	    -1, 0, 0, 0,
+	    INFO_CLK_DIV, 0, 2, 0,
+	    INFO_CLK_GATE, 7, 0,
+	    0),
+	CFG(CLK_I2S8_APB,
+	    "audss_i2s8_apb",
+	    i2s_apb_parent,
+	    NULL,
+	    -1, 0, 0, 0,
+	    INFO_CLK_DIV, 0, 2, 0,
+	    INFO_CLK_GATE, 8, 0,
+	    0),
+	CFG(CLK_I2S9_APB,
+	    "audss_i2s9_apb",
+	    i2s_apb_parent,
+	    NULL,
+	    -1, 0, 0, 0,
+	    INFO_CLK_DIV, 0, 2, 0,
+	    INFO_CLK_GATE, 9, 0,
+	    0),
+	CFG(CLK_I2S0,
+	    "audss_i2s0",
+	    i2s0_parents,
+	    NULL,
+	    INFO_CLK_MUX, 0, 2, 0,
+	    INFO_CLK_DIV, 2, 2, 0,
+	    INFO_CLK_GATE, 0, 0,
+	    0),
+	CFG(CLK_I2S1,
+	    "audss_i2s1",
+	    i2s1_parents,
+	    NULL,
+	    INFO_CLK_MUX, 2, 2, 0,
+	    INFO_CLK_DIV, 4, 2, 0,
+	    INFO_CLK_GATE, 1, 0,
+	    0),
+	CFG(CLK_I2S2,
+	    "audss_i2s2",
+	    i2s2_parents,
+	    NULL,
+	    INFO_CLK_MUX, 4, 2, 0,
+	    INFO_CLK_DIV, 6, 2, 0,
+	    INFO_CLK_GATE, 2, 0,
+	    0),
+	CFG(CLK_I2S3,
+	    "audss_i2s3",
+	    i2s3_parents,
+	    i2s3_mux_table,
+	    INFO_CLK_MUX, 6, 2, 0,
+	    INFO_CLK_DIV, 8, 2, 0,
+	    INFO_CLK_GATE, 3, 0,
+	    0),
+	CFG(CLK_I2S4,
+	    "audss_i2s4",
+	    i2s4_parents,
+	    i2s4_mux_table,
+	    INFO_CLK_MUX, 8, 2, 0,
+	    INFO_CLK_DIV, 10, 2, 0,
+	    INFO_CLK_GATE, 4, 0,
+	    0),
+	CFG(CLK_I2S5,
+	    "audss_i2s5",
+	    i2s5_parents,
+	    NULL,
+	    INFO_CLK_MUX, 10, 2, 0,
+	    INFO_CLK_DIV, 12, 2, 0,
+	    INFO_CLK_GATE, 5, 0,
+	    0),
+	CFG(CLK_I2S6,
+	    "audss_i2s6",
+	    i2s6_parents,
+	    NULL,
+	    INFO_CLK_MUX, 12, 2, 0,
+	    INFO_CLK_DIV, 14, 2, 0,
+	    INFO_CLK_GATE, 6, 0,
+	    0),
+	CFG(CLK_I2S7,
+	    "audss_i2s7",
+	    i2s7_parents,
+	    NULL,
+	    INFO_CLK_MUX, 14, 2, 0,
+	    INFO_CLK_DIV, 16, 2, 0,
+	    INFO_CLK_GATE, 7, 0,
+	    0),
+	CFG(CLK_I2S8,
+	    "audss_i2s8",
+	    i2s8_parents,
+	    NULL,
+	    INFO_CLK_MUX, 16, 2, 0,
+	    INFO_CLK_DIV, 18, 2, 0,
+	    INFO_CLK_GATE, 8, 0,
+	    0),
+	CFG(CLK_I2S9,
+	    "audss_i2s9",
+	    i2s9_parents,
+	    NULL,
+	    INFO_CLK_MUX, 18, 2, 0,
+	    INFO_CLK_DIV, 20, 2, 0,
+	    INFO_CLK_GATE, 9, 0,
+	    0),
+	/* mclk */
+	CFG(CLK_MCLK0,
+	    "audss_mclk0",
+	    mclk_parents,
+	    NULL,
+	    INFO_MCLK, 5, 1, 0,
+	    -1, 0, 0, 0,
+	    INFO_MCLK, 0, 0,
+	    0),
+	CFG(CLK_MCLK1,
+	    "audss_mclk1",
+	    mclk_parents,
+	    NULL,
+	    INFO_MCLK, 6, 1, 0,
+	    -1, 0, 0, 0,
+	    INFO_MCLK, 1, 0,
+	    0),
+	CFG(CLK_MCLK2,
+	    "audss_mclk2",
+	    mclk_parents,
+	    NULL,
+	    INFO_MCLK, 7, 1, 0,
+	    -1, 0, 0, 0,
+	    INFO_MCLK, 2, 0,
+	    0),
+	CFG(CLK_MCLK3,
+	    "audss_mclk3",
+	    mclk_parents,
+	    NULL,
+	    INFO_MCLK, 8, 1, 0,
+	    -1, 0, 0, 0,
+	    INFO_MCLK, 3, 0,
+	    0),
+	CFG(CLK_MCLK4,
+	    "audss_mclk4",
+	    mclk_parents,
+	    NULL,
+	    INFO_MCLK, 9, 1, 0,
+	    -1, 0, 0, 0,
+	    INFO_MCLK, 4, 0,
+	    0),
+};
+
+struct sky1_audss_clks_devtype_data {
+	u32 (*reg_save)[2];
+	size_t reg_save_size;
+	const char * const *clk_names;
+	size_t clk_num;
+	const u32 *clk_rate_default;
+	const struct composite_clk_cfg *clk_cfg;
+	size_t clk_cfg_size;
+};
+
+struct sky1_audss_clks_priv {
+	struct device *dev;
+	struct regmap *regmap_cru;
+	struct clk *clks[SKY1_AUDSS_CLK_PARENTS_CNT];
+	const struct sky1_audss_clks_devtype_data *devtype_data;
+	spinlock_t lock;
+	struct clk_hw_onecell_data *clk_data;
+};
+
+/*
+ * clk_ops for audss clock mux/divider/gate
+ */
+struct sky1_clk_divider {
+	struct clk_divider div;
+	struct regmap *regmap;
+	int offset;
+};
+
+struct sky1_clk_gate {
+	struct clk_gate gate;
+	struct regmap *regmap;
+	int offset;
+};
+
+struct sky1_clk_mux {
+	struct clk_mux mux;
+	struct regmap *regmap;
+	int offset;
+};
+
+static inline struct sky1_clk_mux *to_sky1_clk_mux(struct clk_mux *mux)
+{
+	return container_of(mux, struct sky1_clk_mux, mux);
+}
+
+static u8 sky1_audss_clk_mux_get_parent(struct clk_hw *hw)
+{
+	struct clk_mux *mux = to_clk_mux(hw);
+	struct sky1_clk_mux *sky1_mux = to_sky1_clk_mux(mux);
+	u32 val;
+
+	regmap_read(sky1_mux->regmap, sky1_mux->offset, &val);
+	val = val >> mux->shift;
+	val &= mux->mask;
+
+	return clk_mux_val_to_index(hw, mux->table, mux->flags, val);
+}
+
+static int sky1_audss_clk_mux_set_parent(struct clk_hw *hw, u8 index)
+{
+	struct clk_mux *mux = to_clk_mux(hw);
+	u32 val = clk_mux_index_to_val(mux->table, mux->flags, index);
+	struct sky1_clk_mux *sky1_mux = to_sky1_clk_mux(mux);
+	unsigned long flags = 0;
+	u32 reg;
+
+	if (mux->lock)
+		spin_lock_irqsave(mux->lock, flags);
+	else
+		__acquire(mux->lock);
+
+	if (mux->flags & CLK_MUX_HIWORD_MASK) {
+		reg = mux->mask << (mux->shift + 16);
+	} else {
+		regmap_read(sky1_mux->regmap, sky1_mux->offset, &reg);
+		reg &= ~(mux->mask << mux->shift);
+	}
+	val = val << mux->shift;
+	reg |= val;
+	regmap_write(sky1_mux->regmap, sky1_mux->offset, reg);
+
+	if (mux->lock)
+		spin_unlock_irqrestore(mux->lock, flags);
+	else
+		__release(mux->lock);
+
+	return 0;
+}
+
+static int sky1_audss_clk_mux_determine_rate(struct clk_hw *hw,
+					     struct clk_rate_request *req)
+{
+	struct clk_mux *mux = to_clk_mux(hw);
+
+	return clk_mux_determine_rate_flags(hw, req, mux->flags);
+}
+
+static const struct clk_ops sky1_audss_clk_mux_ops = {
+	.get_parent = sky1_audss_clk_mux_get_parent,
+	.set_parent = sky1_audss_clk_mux_set_parent,
+	.determine_rate = sky1_audss_clk_mux_determine_rate,
+};
+
+static inline struct sky1_clk_divider *to_sky1_clk_divider(struct clk_divider *div)
+{
+	return container_of(div, struct sky1_clk_divider, div);
+}
+
+static unsigned long sky1_audss_clk_divider_recalc_rate(struct clk_hw *hw,
+							unsigned long parent_rate)
+{
+	struct clk_divider *divider = to_clk_divider(hw);
+	struct sky1_clk_divider *sky1_div = to_sky1_clk_divider(divider);
+	unsigned int val;
+
+	regmap_read(sky1_div->regmap, sky1_div->offset, &val);
+	val = val >> divider->shift;
+	val &= clk_div_mask(divider->width);
+
+	return divider_recalc_rate(hw, parent_rate, val, divider->table,
+				   divider->flags, divider->width);
+}
+
+static int sky1_audss_clk_divider_determine_rate(struct clk_hw *hw,
+						 struct clk_rate_request *req)
+{
+	struct clk_divider *divider = to_clk_divider(hw);
+	struct sky1_clk_divider *sky1_div = to_sky1_clk_divider(divider);
+
+	/* if read only, just return current value */
+	if (divider->flags & CLK_DIVIDER_READ_ONLY) {
+		u32 val;
+
+		regmap_read(sky1_div->regmap, sky1_div->offset, &val);
+		val = val >> divider->shift;
+		val &= clk_div_mask(divider->width);
+
+		return divider_ro_determine_rate(hw, req, divider->table,
+						 divider->width,
+						 divider->flags, val);
+	}
+
+	return divider_determine_rate(hw, req, divider->table, divider->width,
+				      divider->flags);
+}
+
+static int sky1_audss_clk_divider_set_rate(struct clk_hw *hw,
+					   unsigned long rate,
+					   unsigned long parent_rate)
+{
+	struct clk_divider *divider = to_clk_divider(hw);
+	struct sky1_clk_divider *sky1_div = to_sky1_clk_divider(divider);
+	int value;
+	unsigned long flags = 0;
+	u32 val;
+
+	value = divider_get_val(rate, parent_rate, divider->table,
+				divider->width, divider->flags);
+	if (value < 0)
+		return value;
+
+	if (divider->lock)
+		spin_lock_irqsave(divider->lock, flags);
+	else
+		__acquire(divider->lock);
+
+	if (divider->flags & CLK_DIVIDER_HIWORD_MASK) {
+		val = clk_div_mask(divider->width) << (divider->shift + 16);
+	} else {
+		regmap_read(sky1_div->regmap, sky1_div->offset, &val);
+		val &= ~(clk_div_mask(divider->width) << divider->shift);
+	}
+	val |= (u32)value << divider->shift;
+	regmap_write(sky1_div->regmap, sky1_div->offset, val);
+
+	if (divider->lock)
+		spin_unlock_irqrestore(divider->lock, flags);
+	else
+		__release(divider->lock);
+
+	return 0;
+}
+
+static const struct clk_ops sky1_audss_clk_divider_ops = {
+	.recalc_rate = sky1_audss_clk_divider_recalc_rate,
+	.determine_rate = sky1_audss_clk_divider_determine_rate,
+	.set_rate = sky1_audss_clk_divider_set_rate,
+};
+
+static inline struct sky1_clk_gate *to_sky1_clk_gate(struct clk_gate *gate)
+{
+	return container_of(gate, struct sky1_clk_gate, gate);
+}
+
+static void sky1_audss_clk_gate_endisable(struct clk_hw *hw, int enable)
+{
+	struct clk_gate *gate = to_clk_gate(hw);
+	struct sky1_clk_gate *sky1_gate = to_sky1_clk_gate(gate);
+	int set = gate->flags & CLK_GATE_SET_TO_DISABLE ? 1 : 0;
+	unsigned long flags = 0;
+	u32 reg;
+
+	set ^= enable;
+
+	if (gate->lock)
+		spin_lock_irqsave(gate->lock, flags);
+	else
+		__acquire(gate->lock);
+
+	if (gate->flags & CLK_GATE_HIWORD_MASK) {
+		reg = BIT(gate->bit_idx + 16);
+		if (set)
+			reg |= BIT(gate->bit_idx);
+	} else {
+		regmap_read(sky1_gate->regmap, sky1_gate->offset, &reg);
+
+		if (set)
+			reg |= BIT(gate->bit_idx);
+		else
+			reg &= ~BIT(gate->bit_idx);
+	}
+
+	regmap_write(sky1_gate->regmap, sky1_gate->offset, reg);
+
+	if (gate->lock)
+		spin_unlock_irqrestore(gate->lock, flags);
+	else
+		__release(gate->lock);
+}
+
+static int sky1_audss_clk_gate_enable(struct clk_hw *hw)
+{
+	sky1_audss_clk_gate_endisable(hw, 1);
+
+	return 0;
+}
+
+static void sky1_audss_clk_gate_disable(struct clk_hw *hw)
+{
+	sky1_audss_clk_gate_endisable(hw, 0);
+}
+
+static int sky1_audss_clk_gate_is_enabled(struct clk_hw *hw)
+{
+	struct clk_gate *gate = to_clk_gate(hw);
+	struct sky1_clk_gate *sky1_gate = to_sky1_clk_gate(gate);
+	u32 reg;
+
+	regmap_read(sky1_gate->regmap, sky1_gate->offset, &reg);
+
+	/* if a set bit disables this clk, flip it before masking */
+	if (gate->flags & CLK_GATE_SET_TO_DISABLE)
+		reg ^= BIT(gate->bit_idx);
+
+	reg &= BIT(gate->bit_idx);
+
+	return !!reg;
+}
+
+static const struct clk_ops sky1_audss_clk_gate_ops = {
+	.enable = sky1_audss_clk_gate_enable,
+	.disable = sky1_audss_clk_gate_disable,
+	.is_enabled = sky1_audss_clk_gate_is_enabled,
+};
+
+static struct clk_hw *sky1_audss_clk_register(struct device *dev,
+					      const char *name,
+					      const char * const *parent_names,
+					      int num_parents,
+					      struct regmap *regmap,
+					      const u32 *mux_table,
+					      struct muxdiv_cfg *mux_cfg,
+					      struct muxdiv_cfg *div_cfg,
+					      struct gate_cfg *gate_cfg,
+					      unsigned long flags,
+					      spinlock_t *lock)
+{
+	const struct clk_ops *sky1_mux_ops = NULL;
+	const struct clk_ops *sky1_div_ops = NULL;
+	const struct clk_ops *sky1_gate_ops = NULL;
+	struct clk_hw *hw = ERR_PTR(-ENOMEM);
+	struct sky1_clk_divider *sky1_div = NULL;
+	struct sky1_clk_gate *sky1_gate = NULL;
+	struct sky1_clk_mux *sky1_mux = NULL;
+
+	if (mux_cfg->offset >= 0) {
+		sky1_mux = devm_kzalloc(dev, sizeof(*sky1_mux), GFP_KERNEL);
+		if (!sky1_mux)
+			return ERR_PTR(-ENOMEM);
+
+		sky1_mux->mux.reg = NULL;
+		sky1_mux->mux.shift = mux_cfg->shift;
+		sky1_mux->mux.mask = BIT(mux_cfg->width) - 1;
+		sky1_mux->mux.flags = mux_cfg->flags;
+		sky1_mux->mux.table = mux_table;
+		sky1_mux->mux.lock = lock;
+		sky1_mux_ops = &sky1_audss_clk_mux_ops;
+		sky1_mux->regmap = regmap;
+		sky1_mux->offset = mux_cfg->offset;
+	}
+
+	if (div_cfg->offset >= 0) {
+		sky1_div = devm_kzalloc(dev, sizeof(*sky1_div), GFP_KERNEL);
+		if (!sky1_div)
+			return ERR_PTR(-ENOMEM);
+
+		sky1_div->div.reg = NULL;
+		sky1_div->div.shift = div_cfg->shift;
+		sky1_div->div.width = div_cfg->width;
+		sky1_div->div.flags = div_cfg->flags | CLK_DIVIDER_POWER_OF_TWO;
+		sky1_div->div.lock = lock;
+		sky1_div_ops = &sky1_audss_clk_divider_ops;
+		sky1_div->regmap = regmap;
+		sky1_div->offset = div_cfg->offset;
+	}
+
+	if (gate_cfg->offset >= 0) {
+		sky1_gate = devm_kzalloc(dev, sizeof(*sky1_gate), GFP_KERNEL);
+		if (!sky1_gate)
+			return ERR_PTR(-ENOMEM);
+
+		sky1_gate->gate.reg = NULL;
+		sky1_gate->gate.bit_idx = gate_cfg->shift;
+		sky1_gate->gate.flags = gate_cfg->flags;
+		sky1_gate->gate.lock = lock;
+		sky1_gate_ops = &sky1_audss_clk_gate_ops;
+		sky1_gate->regmap = regmap;
+		sky1_gate->offset = gate_cfg->offset;
+	}
+
+	hw = clk_hw_register_composite(dev, name, parent_names, num_parents,
+				       sky1_mux ? &sky1_mux->mux.hw : NULL, sky1_mux_ops,
+				       sky1_div ? &sky1_div->div.hw : NULL, sky1_div_ops,
+				       sky1_gate ? &sky1_gate->gate.hw : NULL, sky1_gate_ops,
+				       flags);
+	if (IS_ERR(hw)) {
+		dev_err(dev, "register %s clock failed with err = %ld\n",
+			name, PTR_ERR(hw));
+		return hw;
+	}
+
+	return hw;
+}
+
+static int sky1_audss_clks_get(struct sky1_audss_clks_priv *priv)
+{
+	const struct sky1_audss_clks_devtype_data *devtype_data = priv->devtype_data;
+	int i;
+
+	for (i = 0; i < devtype_data->clk_num; i++) {
+		priv->clks[i] = devm_clk_get(priv->dev, devtype_data->clk_names[i]);
+		if (IS_ERR(priv->clks[i]))
+			return dev_err_probe(priv->dev, PTR_ERR(priv->clks[i]),
+					     "failed to get clock %s", devtype_data->clk_names[i]);
+	}
+
+	return 0;
+}
+
+static int sky1_audss_clks_enable(struct sky1_audss_clks_priv *priv)
+{
+	const struct sky1_audss_clks_devtype_data *devtype_data = priv->devtype_data;
+	int i, err;
+
+	for (i = 0; i < devtype_data->clk_num; i++) {
+		err = clk_prepare_enable(priv->clks[i]);
+		if (err) {
+			dev_err(priv->dev, "failed to enable clock %s\n",
+				devtype_data->clk_names[i]);
+			goto err_clks;
+		}
+	}
+
+	return 0;
+
+err_clks:
+	while (--i >= 0)
+		clk_disable_unprepare(priv->clks[i]);
+
+	return err;
+}
+
+static void sky1_audss_clks_disable(struct sky1_audss_clks_priv *priv)
+{
+	const struct sky1_audss_clks_devtype_data *devtype_data = priv->devtype_data;
+	int i;
+
+	for (i = 0; i < devtype_data->clk_num; i++)
+		clk_disable_unprepare(priv->clks[i]);
+}
+
+static int sky1_audss_clks_set_rate(struct sky1_audss_clks_priv *priv)
+{
+	const struct sky1_audss_clks_devtype_data *devtype_data = priv->devtype_data;
+	int i, err;
+
+	for (i = 0; i < devtype_data->clk_num; i++) {
+		err = clk_set_rate(priv->clks[i], devtype_data->clk_rate_default[i]);
+		if (err) {
+			dev_err(priv->dev, "failed to set clock rate %s\n",
+				devtype_data->clk_names[i]);
+			return err;
+		}
+	}
+
+	return 0;
+}
+
+/* register sky1 audio subsystem clocks */
+static int sky1_audss_clk_probe(struct platform_device *pdev)
+{
+	const struct sky1_audss_clks_devtype_data *devtype_data;
+	struct sky1_audss_clks_priv *priv;
+	struct device_node *parent_np;
+	struct device *dev = &pdev->dev;
+	struct clk_hw **clk_table;
+	struct regmap *regmap_cru;
+	int i, ret;
+
+	parent_np = of_get_parent(pdev->dev.of_node);
+	regmap_cru = syscon_node_to_regmap(parent_np);
+	of_node_put(parent_np);
+	if (IS_ERR(regmap_cru))
+		return dev_err_probe(dev, PTR_ERR(regmap_cru),
+				     "unable to get audss cru regmap");
+
+	devtype_data = device_get_match_data(dev);
+	if (!devtype_data)
+		return -ENODEV;
+
+	priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
+	if (!priv)
+		return -ENOMEM;
+
+	spin_lock_init(&priv->lock);
+
+	priv->clk_data = devm_kzalloc(&pdev->dev,
+				      struct_size(priv->clk_data, hws, SKY1_AUDSS_NUM_CLKS),
+				      GFP_KERNEL);
+	if (!priv->clk_data)
+		return -ENOMEM;
+
+	priv->clk_data->num = SKY1_AUDSS_NUM_CLKS;
+	clk_table = priv->clk_data->hws;
+
+	priv->dev = dev;
+	priv->regmap_cru = regmap_cru;
+	priv->devtype_data = devtype_data;
+
+	/*
+	 * Link to audss cru for runtime PM ordering: cru resumes (deasserts
+	 * reset) before clk, and suspends (asserts reset) after clk.
+	 */
+	if (!device_link_add(dev, dev->parent,
+			     DL_FLAG_STATELESS | DL_FLAG_PM_RUNTIME |
+			     DL_FLAG_RPM_ACTIVE))
+		return dev_err_probe(dev, -EINVAL, "failed to link to audss syscon");
+
+	ret = sky1_audss_clks_get(priv);
+	if (ret)
+		goto err_link;
+
+	platform_set_drvdata(pdev, priv);
+
+	ret = sky1_audss_clks_enable(priv);
+	if (ret) {
+		dev_err(dev, "failed to enable clocks\n");
+		goto err_link;
+	}
+
+	/*
+	 * Enable runtime PM here to allow the clock core using runtime PM
+	 * for the registered clocks.
+	 */
+	pm_runtime_get_noresume(dev);
+	pm_runtime_set_active(dev);
+	pm_runtime_enable(dev);
+
+	ret = sky1_audss_clks_set_rate(priv);
+	if (ret) {
+		dev_err(dev, "failed to set clocks rate\n");
+		goto fail_clks_set;
+	}
+
+	/* audio_clk4 clock fixed divider */
+	clk_table[CLK_AUD_CLK4_DIV2] =
+		devm_clk_hw_register_fixed_factor(dev,
+						  "audio_clk4_div2",
+						  "audio_clk4",
+						  0,
+						  1, 2);
+	if (IS_ERR(clk_table[CLK_AUD_CLK4_DIV2])) {
+		ret = PTR_ERR(clk_table[CLK_AUD_CLK4_DIV2]);
+		dev_err(dev, "failed to register clock %d, ret:%d\n", CLK_AUD_CLK4_DIV2, ret);
+		goto fail_fixed_clk;
+	}
+
+	clk_table[CLK_AUD_CLK4_DIV4] =
+		devm_clk_hw_register_fixed_factor(dev,
+						  "audio_clk4_div4",
+						  "audio_clk4",
+						  0,
+						  1, 4);
+	if (IS_ERR(clk_table[CLK_AUD_CLK4_DIV4])) {
+		ret = PTR_ERR(clk_table[CLK_AUD_CLK4_DIV4]);
+		dev_err(dev, "failed to register clock %d, ret:%d\n", CLK_AUD_CLK4_DIV4, ret);
+		goto fail_fixed_clk;
+	}
+
+	/* audio_clk5 clock fixed divider */
+	clk_table[CLK_AUD_CLK5_DIV2] =
+		devm_clk_hw_register_fixed_factor(dev,
+						  "audio_clk5_div2",
+						  "audio_clk5",
+						  0,
+						  1, 2);
+	if (IS_ERR(clk_table[CLK_AUD_CLK5_DIV2])) {
+		ret = PTR_ERR(clk_table[CLK_AUD_CLK5_DIV2]);
+		dev_err(dev, "failed to register clock %d, ret:%d\n", CLK_AUD_CLK5_DIV2, ret);
+		goto fail_fixed_clk;
+	}
+
+	for (i = 0; i < devtype_data->clk_cfg_size; i++) {
+		clk_table[devtype_data->clk_cfg[i].id] =
+			sky1_audss_clk_register(dev,
+						devtype_data->clk_cfg[i].name,
+						devtype_data->clk_cfg[i].parent_names,
+						devtype_data->clk_cfg[i].num_parents,
+						regmap_cru,
+						devtype_data->clk_cfg[i].mux_table,
+						devtype_data->clk_cfg[i].mux_cfg,
+						devtype_data->clk_cfg[i].div_cfg,
+						devtype_data->clk_cfg[i].gate_cfg,
+						devtype_data->clk_cfg[i].flags,
+						&priv->lock);
+		if (IS_ERR(clk_table[devtype_data->clk_cfg[i].id])) {
+			ret = PTR_ERR(clk_table[devtype_data->clk_cfg[i].id]);
+			dev_err(dev, "failed to register clock %d, ret:%d\n",
+				devtype_data->clk_cfg[i].id, ret);
+			goto fail_array_clk;
+		}
+	}
+
+	ret = devm_of_clk_add_hw_provider(dev, of_clk_hw_onecell_get, priv->clk_data);
+	if (ret) {
+		dev_err(dev, "failed to add clock provider: %d\n", ret);
+		goto fail_register;
+	}
+
+	pm_runtime_put_sync(dev);
+
+	return 0;
+
+fail_register:
+fail_array_clk:
+	while (i--)
+		clk_hw_unregister_composite(clk_table[devtype_data->clk_cfg[i].id]);
+fail_fixed_clk:
+fail_clks_set:
+	pm_runtime_put_sync(dev);
+	pm_runtime_disable(dev);
+err_link:
+	device_link_remove(dev, dev->parent);
+	return ret;
+}
+
+static void sky1_audss_clk_remove(struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+	struct sky1_audss_clks_priv *priv = dev_get_drvdata(dev);
+	const struct sky1_audss_clks_devtype_data *devtype_data = priv->devtype_data;
+	int i = 0;
+
+	for (i = 0; i < devtype_data->clk_cfg_size; i++)
+		clk_hw_unregister_composite(priv->clk_data->hws[devtype_data->clk_cfg[i].id]);
+
+	if (!pm_runtime_status_suspended(dev))
+		pm_runtime_force_suspend(dev);
+
+	pm_runtime_disable(dev);
+	device_link_remove(dev, dev->parent);
+}
+
+static int __maybe_unused sky1_audss_clk_runtime_suspend(struct device *dev)
+{
+	struct sky1_audss_clks_priv *priv = dev_get_drvdata(dev);
+	const struct sky1_audss_clks_devtype_data *devtype_data = priv->devtype_data;
+	unsigned long flags;
+	int i;
+
+	spin_lock_irqsave(&priv->lock, flags);
+	for (i = 0; i < devtype_data->reg_save_size; i++)
+		regmap_read(priv->regmap_cru,
+			    devtype_data->reg_save[i][0], &devtype_data->reg_save[i][1]);
+	spin_unlock_irqrestore(&priv->lock, flags);
+
+	sky1_audss_clks_disable(priv);
+
+	return 0;
+}
+
+static int __maybe_unused sky1_audss_clk_runtime_resume(struct device *dev)
+{
+	struct sky1_audss_clks_priv *priv = dev_get_drvdata(dev);
+	const struct sky1_audss_clks_devtype_data *devtype_data = priv->devtype_data;
+	unsigned long flags;
+	int i, ret;
+
+	ret = sky1_audss_clks_enable(priv);
+	if (ret) {
+		dev_err(dev, "failed to enable clocks\n");
+		return ret;
+	}
+
+	spin_lock_irqsave(&priv->lock, flags);
+	for (i = 0; i < devtype_data->reg_save_size; i++)
+		regmap_write(priv->regmap_cru,
+			     devtype_data->reg_save[i][0], devtype_data->reg_save[i][1]);
+	spin_unlock_irqrestore(&priv->lock, flags);
+
+	return 0;
+}
+
+static const struct dev_pm_ops sky1_audss_clk_pm_ops = {
+	SET_RUNTIME_PM_OPS(sky1_audss_clk_runtime_suspend,
+			   sky1_audss_clk_runtime_resume, NULL)
+	SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
+				pm_runtime_force_resume)
+};
+
+static const struct sky1_audss_clks_devtype_data sky1_devtype_data = {
+	.reg_save = sky1_reg_save,
+	.reg_save_size = ARRAY_SIZE(sky1_reg_save),
+	.clk_names = sky1_audss_clk_names,
+	.clk_num = ARRAY_SIZE(sky1_audss_clk_names),
+	.clk_rate_default = sky1_clk_rate_default,
+	.clk_cfg = sky1_audss_clks,
+	.clk_cfg_size = ARRAY_SIZE(sky1_audss_clks),
+};
+
+static const struct of_device_id sky1_audss_clk_of_match[] = {
+	{ .compatible = "cix,sky1-audss-clock", .data = &sky1_devtype_data, },
+	{ /* sentinel */ },
+};
+MODULE_DEVICE_TABLE(of, sky1_audss_clk_of_match);
+
+static struct platform_driver sky1_audss_clk_driver = {
+	.probe = sky1_audss_clk_probe,
+	.remove = sky1_audss_clk_remove,
+	.driver = {
+		.name = "sky1-audss-clk",
+		.suppress_bind_attrs = true,
+		.of_match_table = sky1_audss_clk_of_match,
+		.pm = &sky1_audss_clk_pm_ops,
+	},
+};
+module_platform_driver(sky1_audss_clk_driver);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Joakim Zhang <joakim.zhang@cixtech.com>");
+MODULE_DESCRIPTION("Cixtech Sky1 Audio Subsystem Clock Controller Driver");
-- 
2.50.1

[PATCH v4 5/5] arm64: dts: cix: sky1: add audss system control

[joakim.zhang]

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

Add audss system control device node, which would provides
clocks and resets for devices in audss domain.

Signed-off-by: Joakim Zhang <joakim.zhang@cixtech.com>
---
 arch/arm64/boot/dts/cix/sky1.dtsi | 24 ++++++++++++++++++++++++
 1 file changed, 24 insertions(+)

diff --git a/arch/arm64/boot/dts/cix/sky1.dtsi b/arch/arm64/boot/dts/cix/sky1.dtsi
index bb5cfb1f2113..3091789fc176 100644
--- a/arch/arm64/boot/dts/cix/sky1.dtsi
+++ b/arch/arm64/boot/dts/cix/sky1.dtsi
@@ -6,6 +6,10 @@
 
 #include <dt-bindings/interrupt-controller/arm-gic.h>
 #include <dt-bindings/clock/cix,sky1.h>
+#include <dt-bindings/clock/cix,sky1-audss-clock.h>
+#include <dt-bindings/reset/cix,sky1-system-control.h>
+#include <dt-bindings/reset/cix,sky1-s5-system-control.h>
+#include <dt-bindings/reset/cix,sky1-audss-system-control.h>
 #include "sky1-power.h"
 
 / {
@@ -488,6 +492,26 @@ mbox_pm2ap: mailbox@65a0080 {
 			cix,mbox-dir = "rx";
 		};
 
+		audss_cru: system-controller@7110000 {
+			compatible = "cix,sky1-audss-system-control", "syscon";
+			reg = <0x0 0x07110000 0x0 0x10000>;
+			power-domains = <&smc_devpd SKY1_PD_AUDIO>;
+			resets = <&s5_syscon SKY1_AUDIO_HIFI5_NOC_RESET_N>;
+			#reset-cells = <1>;
+			status = "okay";
+
+			audss_clk: clock-controller {
+				compatible = "cix,sky1-audss-clock";
+				clocks = <&scmi_clk CLK_TREE_AUDIO_CLK0>,
+					 <&scmi_clk CLK_TREE_AUDIO_CLK2>,
+					 <&scmi_clk CLK_TREE_AUDIO_CLK4>,
+					 <&scmi_clk CLK_TREE_AUDIO_CLK5>;
+				clock-names = "x8k", "x11k", "sys", "48m";
+				#clock-cells = <1>;
+				status = "okay";
+			};
+		};
+
 		mbox_sfh2ap: mailbox@8090000 {
 			compatible = "cix,sky1-mbox";
 			reg = <0x0 0x08090000 0x0 0x10000>;
-- 
2.50.1

Re: [PATCH v4 3/5] dt-bindings: clock: cix,sky1-audss-clock: add audss clock controller

[sashiko-bot]

Thank you for your contribution! Sashiko AI review found 1 potential issue(s) to consider:
- [Low] Typo in the clocks property description: 'delicated' instead of 'dedicated'.
--

commit 0bf88f97ab11d2c8010b886d37df1eed62b3d256
Author: Joakim Zhang <joakim.zhang@cixtech.com>

dt-bindings: clock: cix,sky1-audss-clock: add audss clock controller

This commit adds a devicetree binding for the Cix Sky1 audio subsystem
(AUDSS) clock controller. It acts as a child of the system control
syscon, routing 4 reference clocks to internal consumers.

> diff --git a/Documentation/devicetree/bindings/clock/cix,sky1-audss-clock.yaml b/Documentation/devicetree/bindings/clock/cix,sky1-audss-clock.yaml
> new file mode 100644
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/clock/cix,sky1-audss-clock.yaml
[ ... ]
> +  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 for HDA, Timer and Watchdog, which is a delicated 48MHz clock.

[Severity: Low]
This isn't a bug, but there is a typo here where delicated is used instead of
dedicated.

-- 
Sashiko AI review · https://sashiko.dev/#/patchset/20260617060437.1474816-1-joakim.zhang@cixtech.com?part=3

Re: [PATCH v4 1/5] dt-bindings: soc: cix,sky1-system-control: add audss system control

[sashiko-bot]

Thank you for your contribution! Sashiko AI review found 1 potential issue(s) to consider:
- [Medium] The `cix,sky1-audss-system-control` compatible acts as a reset provider but does not require the `#reset-cells` property in its conditional block.
--

commit bc475a5f4ccc93d6c4b68c75338adb8eb56b01b2
Author: Joakim Zhang <joakim.zhang@cixtech.com>

dt-bindings: soc: cix,sky1-system-control: add audss system control

This commit adds device tree bindings for the Cix Sky1 Audio Subsystem
(AUDSS) system control block. It introduces the new compatible string
cix,sky1-audss-system-control and defines constraints for its child
clock-controller, power domain, and resets.

> 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 a01a515222c6d..5a1cd5c24ade7 100644
> --- a/Documentation/devicetree/bindings/soc/cix/cix,sky1-system-control.yaml
> +++ b/Documentation/devicetree/bindings/soc/cix/cix,sky1-system-control.yaml

[ ... ]

> +allOf:
> +  - if:
> +      properties:
> +        compatible:
> +          contains:
> +            const: cix,sky1-audss-system-control
> +    then:
> +      required:
> +        - clock-controller
> +        - power-domains
> +        - resets

[Severity: Medium]
Since the cix,sky1-audss-system-control compatible acts as a reset provider,
should #reset-cells also be included in this required list?

> +    else:
> +      properties:
> +        clock-controller: false
> +        power-domains: false
> +        resets: false

-- 
Sashiko AI review · https://sashiko.dev/#/patchset/20260617060437.1474816-1-joakim.zhang@cixtech.com?part=1

Re: [PATCH v4 2/5] reset: cix: add audss support to sky1 reset driver

[sashiko-bot]

Thank you for your contribution! Sashiko AI review found 4 potential issue(s) to consider:
- [High] Using asynchronous `pm_runtime_put()` on the probe error path cancels the pending suspend, leaking the active power state.
- [High] Premature registration of the reset controller creates a race condition that can lead to bus faults or use-after-free.
- [High] The return value of `reset_control_deassert()` is ignored.
- [Low] Unconditional assignment of the `.pm` ops pointer generates dead code when PM is disabled.
--

commit 22eea5c604734dfc2f4c075cfefb3354c7756088
Author: Joakim Zhang <joakim.zhang@cixtech.com>

reset: cix: add audss support to sky1 reset driver

Extend the Sky1 reset controller driver for the AUDSS CRU syscon. The
AUDSS block provides sixteen active-low software reset bits in one
register for audio subsystem peripherals.

> diff --git a/drivers/reset/reset-sky1.c b/drivers/reset/reset-sky1.c
> index 78e80a533c399..462501c2ea066 100644
> --- a/drivers/reset/reset-sky1.c
> +++ b/drivers/reset/reset-sky1.c
[ ... ]
> @@ -343,12 +393,36 @@ static int sky1_reset_probe(struct platform_device *pdev)
>  	sky1src->rcdev.of_node   = dev->of_node;
>  	sky1src->rcdev.dev       = dev;
>  
> -	return devm_reset_controller_register(dev, &sky1src->rcdev);
> +	ret = devm_reset_controller_register(dev, &sky1src->rcdev);
> +	if (ret)
> +		return ret;
> +

[Severity: High]
Does registering the reset controller this early in sky1_reset_probe()
expose it to the system before hardware and power management are fully
initialized?

If a concurrent consumer device attempts to trigger a reset before the
NOC reset is acquired and power management is enabled, could this
execute register operations against unpowered or uninitialized hardware?

If devm_reset_control_get_exclusive() later returns -EPROBE_DEFER, the
controller would be abruptly unregistered via devres while potentially
in use.

Could devm_reset_controller_register() be called as the final step in
probe() after all initialization is complete?

> +	platform_set_drvdata(pdev, sky1src);
> +
> +	if (of_device_is_compatible(dev->of_node, "cix,sky1-audss-system-control")) {
> +		sky1src->rst_noc = devm_reset_control_get_exclusive(dev, NULL);
> +		if (IS_ERR(sky1src->rst_noc))
> +			return dev_err_probe(dev, PTR_ERR(sky1src->rst_noc),
> +					     "failed to get audss noc reset");
> +
> +		pm_runtime_get_noresume(dev);
> +		pm_runtime_set_active(dev);
> +		devm_pm_runtime_enable(dev);
> +
> +		reset_control_deassert(sky1src->rst_noc);

[Severity: High]
Does this ignore the integer return value from reset_control_deassert()?

If deassertion fails, the driver proceeds to call
devm_of_platform_populate(). Child devices could probe and attempt to
access their registers while the hardware is still stuck in reset.

Could we validate the return value of reset_control_deassert() before
proceeding?

> +
> +		ret = devm_of_platform_populate(dev);
> +		pm_runtime_put(dev);
> +		return ret;

[Severity: High]
If devm_of_platform_populate() fails, this uses the asynchronous
pm_runtime_put() on the error path.

Since devm_pm_runtime_enable() was used, returning an error triggers
devres cleanup which executes pm_runtime_disable(). This cancels any
pending asynchronous idle/suspend work.

Because of this cancellation, sky1_reset_runtime_suspend() would never
execute, leaving the NOC reset permanently leaked in a deasserted state.

Should this use pm_runtime_put_sync() instead to guarantee synchronous
suspend before PM is disabled?

> +	}
> +
> +	return 0;
>  }
[ ... ]
> @@ -358,6 +432,12 @@ static struct platform_driver sky1_reset_driver = {
>  	.driver = {
>  		.name		= "cix,sky1-rst",
>  		.of_match_table = sky1_sysreg_of_match,
> +		.pm		= &(const struct dev_pm_ops){
> +			SET_RUNTIME_PM_OPS(sky1_reset_runtime_suspend,
> +					   sky1_reset_runtime_resume, NULL)
> +			SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
> +						pm_runtime_force_resume)
> +		},

[Severity: Low]
Does this unconditional assignment of the .pm pointer generate dead code
when CONFIG_PM is disabled?

The structure and statically referenced callbacks get compiled into the
kernel even though they can never execute.

Could this use the pm_ptr() wrapper macro to allow the compiler to
eliminate the unused structure?

>  	},
>  };

-- 
Sashiko AI review · https://sashiko.dev/#/patchset/20260617060437.1474816-1-joakim.zhang@cixtech.com?part=2

Re: [PATCH v4 4/5] clk: cix: add sky1 audss clock controller

[sashiko-bot]

Thank you for your contribution! Sashiko AI review found 6 potential issue(s) to consider:
- [High] Use-after-free race during device removal because composite clocks are unregistered manually before the devres-managed OF clock provider is unregistered.
- [High] Multiple independent clocks erroneously share the exact same hardware gate bits, causing Common Clock Framework (CCF) state corruption.
- [High] Calling `pm_runtime_force_suspend()` before `pm_runtime_disable()` in `remove()` creates a concurrency race condition.
- [Medium] Parent clock enables are permanently leaked in the probe error path and on device removal if `CONFIG_PM` is disabled.
- [Medium] Missing `pm_ptr()` wrapper for `dev_pm_ops` pointer causes dead code when `CONFIG_PM` is disabled.
- [Medium] Device register states are saved into a global static array during runtime suspend, causing an anti-pattern and potential data races.
--

commit ba255415d22d68eb57522fe8fe2cfadbf4ba75d6
Author: Joakim Zhang <joakim.zhang@cixtech.com>

clk: cix: add sky1 audss clock controller

Add a platform driver for the Cix Sky1 Audio Subsystem (AUDSS) internal
clock controller.

> diff --git a/drivers/clk/cix/clk-sky1-audss.c b/drivers/clk/cix/clk-sky1-audss.c
> new file mode 100644
> index 0000000000000..c1e7dfe45d12c
> --- /dev/null
> +++ b/drivers/clk/cix/clk-sky1-audss.c
> @@ -0,0 +1,1167 @@
[ ... ]
> +static u32 sky1_reg_save[][2] = {
> +	{ INFO_HIFI0,  0 },
> +	{ INFO_CLK_GATE,  0 },
> +	{ INFO_CLK_DIV, 0 },
> +	{ INFO_CLK_MUX, 0 },
> +	{ INFO_MCLK, 0 },
> +};

[Severity: Medium]
Is it safe to save device register states into a global static array during
runtime suspend? If multiple instances of this driver or SoC ever exist in a
system, wouldn't they overwrite each other's suspended states? Could this
state be allocated dynamically within the per-device priv structure instead?

[ ... ]
> +	/* wdg */
> +	CFG(CLK_WDG_APB,
> +	    "audss_wdg_apb",
> +	    wdg_apb_parent,
> +	    NULL,
> +	    -1, 0, 0, 0,
> +	    -1, 0, 0, 0,
> +	    INFO_CLK_GATE, 10, 0,
> +	    0),
> +	CFG(CLK_WDG_WDG,
> +	    "audss_wdg_wdg",
> +	    wdg_wdg_parent,
> +	    NULL,
> +	    -1, 0, 0, 0,
> +	    -1, 0, 0, 0,
> +	    INFO_CLK_GATE, 10, 0,
> +	    0),

[Severity: High]
Does defining two distinct clocks that map to the exact same gate bit
(shift 10) cause Common Clock Framework state corruption? Since CCF tracks
their states separately, if a driver disables CLK_WDG_APB, wouldn't it
silently turn off the physical clock for CLK_WDG_WDG as well? Should shared
gates be modeled as a single gate clock with multiple children?

> +	/* timer */
> +	CFG(CLK_TIMER_APB,
> +	    "audss_timer_apb",
> +	    timer_apb_parent,
> +	    NULL,
> +	    -1, 0, 0, 0,
> +	    INFO_CLK_DIV, 0, 2, 0,
> +	    INFO_CLK_GATE, 11, 0,
> +	    0),
> +	CFG(CLK_TIMER_TIMER,
> +	    "audss_timer_timer",
> +	    timer_timer_parent,
> +	    NULL,
> +	    -1, 0, 0, 0,
> +	    -1, 0, 0, 0,
> +	    INFO_CLK_GATE, 11, 0,
> +	    0),

[Severity: High]
Similarly, does having CLK_TIMER_APB and CLK_TIMER_TIMER share gate shift 11
cause the same CCF state tracking issues?

[ ... ]
> +	ret = devm_of_clk_add_hw_provider(dev, of_clk_hw_onecell_get, priv->clk_data);
> +	if (ret) {
> +		dev_err(dev, "failed to add clock provider: %d\n", ret);
> +		goto fail_register;
> +	}
> +
> +	pm_runtime_put_sync(dev);
> +
> +	return 0;
> +
> +fail_register:

[Severity: High]
Does using devm_of_clk_add_hw_provider() here create a use-after-free race
condition during device removal?

Since devres defers unregistration until after the remove function completes,
but sky1_audss_clk_remove() manually destroys the composite clocks, will a
concurrent clk_get() return a dangling pointer while the OF provider is still
active?

> +fail_array_clk:
> +	while (i--)
> +		clk_hw_unregister_composite(clk_table[devtype_data->clk_cfg[i].id]);
> +fail_fixed_clk:
> +fail_clks_set:
> +	pm_runtime_put_sync(dev);
> +	pm_runtime_disable(dev);

[Severity: Medium]
Will the parent clock enables be permanently leaked here if CONFIG_PM is
disabled?

The explicit sky1_audss_clks_enable() called earlier delegates teardown to
runtime PM wrappers like pm_runtime_put_sync(). If CONFIG_PM=n, these wrappers
are no-ops. Does the driver need explicit clock disablement when runtime PM
is unavailable?

> +err_link:
> +	device_link_remove(dev, dev->parent);
> +	return ret;
> +}
> +
> +static void sky1_audss_clk_remove(struct platform_device *pdev)
> +{
> +	struct device *dev = &pdev->dev;
> +	struct sky1_audss_clks_priv *priv = dev_get_drvdata(dev);
> +	const struct sky1_audss_clks_devtype_data *devtype_data = priv->devtype_data;
> +	int i = 0;
> +
> +	for (i = 0; i < devtype_data->clk_cfg_size; i++)
> +		clk_hw_unregister_composite(priv->clk_data->hws[devtype_data->clk_cfg[i].id]);
> +
> +	if (!pm_runtime_status_suspended(dev))
> +		pm_runtime_force_suspend(dev);
> +
> +	pm_runtime_disable(dev);

[Severity: High]
Does calling pm_runtime_force_suspend() before pm_runtime_disable() create a
concurrency race condition?

pm_runtime_force_suspend() temporarily re-enables runtime PM before returning,
which opens a window where a concurrent operation could trigger a runtime
resume. Would it be safer to call pm_runtime_disable() first to ensure the
device stays suspended?

[Severity: Medium]
Also, similar to the probe error path, does delegating hardware disablement to
pm_runtime_force_suspend() leak the parent clocks on removal if CONFIG_PM is
disabled?

> +	device_link_remove(dev, dev->parent);
> +}
> +
> +static int __maybe_unused sky1_audss_clk_runtime_suspend(struct device *dev)
> +{
> +	struct sky1_audss_clks_priv *priv = dev_get_drvdata(dev);
> +	const struct sky1_audss_clks_devtype_data *devtype_data = priv->devtype_data;
> +	unsigned long flags;
> +	int i;
> +
> +	spin_lock_irqsave(&priv->lock, flags);
> +	for (i = 0; i < devtype_data->reg_save_size; i++)
> +		regmap_read(priv->regmap_cru,
> +			    devtype_data->reg_save[i][0], &devtype_data->reg_save[i][1]);

[Severity: Medium]
Does writing to devtype_data->reg_save[i][1] mutate the statically allocated
global array sky1_reg_save from a per-device suspend handler? Could this lead
to data corruption if there are multiple devices, and shouldn't we write to
dynamically allocated per-device state instead?

[ ... ]
> +static struct platform_driver sky1_audss_clk_driver = {
> +	.probe = sky1_audss_clk_probe,
> +	.remove = sky1_audss_clk_remove,
> +	.driver = {
> +		.name = "sky1-audss-clk",
> +		.suppress_bind_attrs = true,
> +		.of_match_table = sky1_audss_clk_of_match,
> +		.pm = &sky1_audss_clk_pm_ops,

[Severity: Medium]
Will this unconditional assignment to .pm produce dead code when CONFIG_PM
is disabled? Should it be wrapped with pm_ptr(&sky1_audss_clk_pm_ops) to
allow the compiler to optimize out the unused structures?

> +	},
> +};

-- 
Sashiko AI review · https://sashiko.dev/#/patchset/20260617060437.1474816-1-joakim.zhang@cixtech.com?part=4

RE: [PATCH v4 0/5] Add Cix Sky1 AUDSS clock and reset support

[Joakim Zhang]

Sorry for the disturb, I will resend the patch set to fix a typo.

Joakim

> -----Original Message-----
> From: joakim.zhang@cixtech.com <joakim.zhang@cixtech.com>
> Sent: Wednesday, June 17, 2026 2:05 PM
> To: mturquette@baylibre.com; sboyd@kernel.org; bmasney@redhat.com;
> robh@kernel.org; krzk+dt@kernel.org; conor+dt@kernel.org;
> p.zabel@pengutronix.de; Gary Yang <gary.yang@cixtech.com>
> Cc: cix-kernel-upstream <cix-kernel-upstream@cixtech.com>; linux-
> clk@vger.kernel.org; devicetree@vger.kernel.org; linux-kernel@vger.kernel.org;
> linux-arm-kernel@lists.infradead.org; Joakim Zhang
> <joakim.zhang@cixtech.com>
> Subject: [PATCH v4 0/5] Add Cix Sky1 AUDSS clock and reset support
> 
> From: Joakim Zhang <joakim.zhang@cixtech.com>
> 
> This patch set adds the clock and reset support for AUDSS. The AUDSS groups
> audio-related peripherals (HDA, I2S, DSP, DMA, mailboxes, watchdog, timer,
> etc.) behind a single Clock and Reset Unit (CRU) register block.
> 
> Clock and reset changes normally belong to separate subsystems and would
> ideally be submitted as independent series. They are combined here because
> the AUDSS DT bindings cross-reference each other: the system-control binding
> describes the clock child node, the clock binding documents reset lines exposed
> on the parent syscon, and the DTS example wires both together. Keeping clock
> and reset in one series gives reviewers the full picture when evaluating the
> binding layout, dependencies, and integration.
> 
> Patches apply in the following order:
> 
>   1. Reset support
>      - dt-bindings: soc: cix,sky1-system-control: add audss system control
>      - reset: cix: add audss support to sky1 reset driver
> 
>   2. Clock support
>      - dt-bindings: clock: cix,sky1-audss-clock: add audss clock controller
>      - clk: cix: add sky1 audss clock controller
> 
>   3. Device tree
>      - arm64: dts: cix: sky1: add audss system control
> 
> The reset and clock parts have each been build-tested and checked with
> dt_binding_check independently. If reviewers prefer separate series for the
> reset and clock maintainers, I can split and resubmit after this round of review
> once the overall design is agreed on.
> 
> ---
> ChangeLogs:
> v3->v4:
>   * move both power domain and resets into parset node (audss_cru)
>   * remove "simple-mfd", and change to populate the child node
>   * cix,sky1-audss.h -> cix,sky1-audss-clock.h
> 
> v2->v3:
>   * clk part:
>     * devm_reset_control_get()->devm_reset_control_get_exclusive()
>     * assert noc reset from suspend
>     * clock parents changes from 6 to 4, and rename the clock names,
>       explain more about this: confirm with our designer, In fact,
>       there are 6 clock sources going into the audio subsystem. audio_clk1
>       and audio_clk3 are redundant in design and are not actually needed
>       in practice, so they are not shown here.
>     * refine clocks and clock-names property
>     * add detailed description of clocks
>     * drop parent node from clk binding
>     * drop define AUDSS_MAX_CLKS
>   * reset part:
>     * rename reset signal macro, remove _N
>     * drop SKY1_AUDSS_SW_RESET_NUM
>     * switching to compatible-style of defining subnodes in parent schema
> 
> v1->v2:
>   * remove audss_rst device node since it doesn't has resource, and
>     move to reset-sky1.c driver.
>   * remove hda related which would be sent after this patch set accepted
>   * soc componnet is okay by default from dtsi
>   * fix for audss clk driver:
>     * remove "comment "Clock options for Cixtech audss:""
>     * add select MFD_SYSCON
>     * move lock and clk_data into struct sky1_audss_clks_priv
>     * const char *name -> const char * const * name
>     * remove CLK_GET_RATE_NOCACHE
>     * divicer -> divider
>     * Reverse Christmas tree order
>     * return reg ? 1 : 0; -> return !!reg;
>     * return ERR_CAST(hw); -> return hw;
>     * of_device_get_match_data(dev) -> device_get_match_data()
>     * add lock from runtime_suspend/resume
>   * loop to more mailing lists
> 
> Joakim Zhang (5):
>   dt-bindings: soc: cix,sky1-system-control: add audss system control
>   reset: cix: add audss support to sky1 reset driver
>   dt-bindings: clock: cix,sky1-audss-clock: add audss clock controller
>   clk: cix: add sky1 audss clock controller
>   arm64: dts: cix: sky1: add audss system control
> 
>  .../bindings/clock/cix,sky1-audss-clock.yaml  |   72 +
>  .../soc/cix/cix,sky1-system-control.yaml      |   48 +
>  arch/arm64/boot/dts/cix/sky1.dtsi             |   24 +
>  drivers/clk/Kconfig                           |    1 +
>  drivers/clk/Makefile                          |    1 +
>  drivers/clk/cix/Kconfig                       |   16 +
>  drivers/clk/cix/Makefile                      |    3 +
>  drivers/clk/cix/clk-sky1-audss.c              | 1167 +++++++++++++++++
>  drivers/reset/reset-sky1.c                    |   86 +-
>  .../dt-bindings/clock/cix,sky1-audss-clock.h  |   60 +
>  .../reset/cix,sky1-audss-system-control.h     |   25 +
>  11 files changed, 1500 insertions(+), 3 deletions(-)  create mode 100644
> Documentation/devicetree/bindings/clock/cix,sky1-audss-clock.yaml
>  create mode 100644 drivers/clk/cix/Kconfig  create mode 100644
> drivers/clk/cix/Makefile  create mode 100644 drivers/clk/cix/clk-sky1-audss.c
> create mode 100644 include/dt-bindings/clock/cix,sky1-audss-clock.h
>  create mode 100644 include/dt-bindings/reset/cix,sky1-audss-system-control.h
> 
> --
> 2.50.1