[PATCH v2 0/3] Add clock support for CMU_M2M

[PATCH v2 0/3] Add clock support for CMU_M2M

[Raghav Sharma]

This series adds clock support for the CMU_M2M block.

Patch[1/3]: dt-bindings: clock: exynosautov920: add m2m clock definitions
        - Adds DT binding for CMU_M2M and clock definitions

Patch[2/3]: clk: samsung: exynosautov920: add block m2m clock support
        - Adds CMU_M2M clock driver support

Patch[3/3]: arm64: dts: exynosautov920: add CMU_M2M clock DT nodes
        - Adds dt node for CMU_M2M

Signed-off-by: Raghav Sharma <raghav.s@samsung.com>
---
Changes in v2:
-Fixed the dt binding checks warning

Link to v1:
https://lore.kernel.org/all/20250808142146.3181062-1-raghav.s@samsung.com/

Got a comment from Krzysztof Kozlowski
Link: https://lore.kernel.org/all/f8ad7883-d879-47ce-aafc-7c5f741f3c18@kernel.org/

Raghav Sharma (3):
  dt-bindings: clock: exynosautov920: add m2m clock definitions
  clk: samsung: exynosautov920: add block m2m clock support
  arm64: dts: exynosautov920: add cmu_m2m clock DT nodes

 .../clock/samsung,exynosautov920-clock.yaml   | 21 +++++++++
 .../arm64/boot/dts/exynos/exynosautov920.dtsi | 13 ++++++
 drivers/clk/samsung/clk-exynosautov920.c      | 45 +++++++++++++++++++
 .../clock/samsung,exynosautov920.h            |  5 +++
 4 files changed, 84 insertions(+)


base-commit: be5d4872e528796df9d7425f2bd9b3893eb3a42c
-- 
2.34.1

[PATCH v2 1/3] dt-bindings: clock: exynosautov920: add m2m clock definitions

[Raghav Sharma]

Add device tree clock binding definitions for CMU_M2M

Signed-off-by: Raghav Sharma <raghav.s@samsung.com>
---
 .../clock/samsung,exynosautov920-clock.yaml   | 21 +++++++++++++++++++
 .../clock/samsung,exynosautov920.h            |  5 +++++
 2 files changed, 26 insertions(+)

diff --git a/Documentation/devicetree/bindings/clock/samsung,exynosautov920-clock.yaml b/Documentation/devicetree/bindings/clock/samsung,exynosautov920-clock.yaml
index 72f59db73f76..b2dfe6ed353a 100644
--- a/Documentation/devicetree/bindings/clock/samsung,exynosautov920-clock.yaml
+++ b/Documentation/devicetree/bindings/clock/samsung,exynosautov920-clock.yaml
@@ -38,6 +38,7 @@ properties:
       - samsung,exynosautov920-cmu-hsi0
       - samsung,exynosautov920-cmu-hsi1
       - samsung,exynosautov920-cmu-hsi2
+      - samsung,exynosautov920-cmu-m2m
       - samsung,exynosautov920-cmu-misc
       - samsung,exynosautov920-cmu-peric0
       - samsung,exynosautov920-cmu-peric1
@@ -226,6 +227,26 @@ allOf:
             - const: embd
             - const: ethernet
 
+  - if:
+      properties:
+        compatible:
+          contains:
+            const: samsung,exynosautov920-cmu-m2m
+
+    then:
+      properties:
+        clocks:
+          items:
+            - description: External reference clock (38.4 MHz)
+            - description: CMU_M2M NOC clock (from CMU_TOP)
+            - description: CMU_M2M JPEG clock (from CMU_TOP)
+
+        clock-names:
+          items:
+            - const: oscclk
+            - const: noc
+            - const: jpeg
+
 required:
   - compatible
   - "#clock-cells"
diff --git a/include/dt-bindings/clock/samsung,exynosautov920.h b/include/dt-bindings/clock/samsung,exynosautov920.h
index 93e6233d1358..0342a988565a 100644
--- a/include/dt-bindings/clock/samsung,exynosautov920.h
+++ b/include/dt-bindings/clock/samsung,exynosautov920.h
@@ -295,4 +295,9 @@
 #define CLK_DOUT_HSI2_ETHERNET          6
 #define CLK_DOUT_HSI2_ETHERNET_PTP      7
 
+/* CMU_M2M */
+#define CLK_MOUT_M2M_JPEG_USER          1
+#define CLK_MOUT_M2M_NOC_USER           2
+#define CLK_DOUT_M2M_NOCP               3
+
 #endif /* _DT_BINDINGS_CLOCK_EXYNOSAUTOV920_H */
-- 
2.34.1

RE: [PATCH v2 1/3] dt-bindings: clock: exynosautov920: add m2m clock definitions

[Alim Akhtar]

Hi Raghav,

> -----Original Message-----
> From: Raghav Sharma <raghav.s@samsung.com>
> Sent: Monday, September 15, 2025 3:24 PM
> To: krzk@kernel.org; s.nawrocki@samsung.com; cw00.choi@samsung.com;
> alim.akhtar@samsung.com; mturquette@baylibre.com; sboyd@kernel.org;
> robh@kernel.org; conor+dt@kernel.org; sunyeal.hong@samsung.com;
> shin.son@samsung.com
> Cc: linux-samsung-soc@vger.kernel.org; linux-clk@vger.kernel.org;
> devicetree@vger.kernel.org; linux-arm-kernel@lists.infradead.org; linux-
> kernel@vger.kernel.org; chandan.vn@samsung.com; dev.tailor@samsung.com;
> karthik.sun@samsung.com; Raghav Sharma <raghav.s@samsung.com>
> Subject: [PATCH v2 1/3] dt-bindings: clock: exynosautov920: add m2m clock
> definitions
> 
> Add device tree clock binding definitions for CMU_M2M
> 
> Signed-off-by: Raghav Sharma <raghav.s@samsung.com>
> ---
Reviewed-by: Alim Akhtar <alim.akhtar@samsung.com>

Re: [PATCH v2 1/3] dt-bindings: clock: exynosautov920: add m2m clock definitions

[Rob Herring (Arm)]

On Mon, 15 Sep 2025 15:23:59 +0530, Raghav Sharma wrote:
> Add device tree clock binding definitions for CMU_M2M
> 
> Signed-off-by: Raghav Sharma <raghav.s@samsung.com>
> ---
>  .../clock/samsung,exynosautov920-clock.yaml   | 21 +++++++++++++++++++
>  .../clock/samsung,exynosautov920.h            |  5 +++++
>  2 files changed, 26 insertions(+)
> 

Acked-by: Rob Herring (Arm) <robh@kernel.org>

Re: (subset) [PATCH v2 1/3] dt-bindings: clock: exynosautov920: add m2m clock definitions

[Krzysztof Kozlowski]

On Mon, 15 Sep 2025 15:23:59 +0530, Raghav Sharma wrote:
> Add device tree clock binding definitions for CMU_M2M
> 
> 

Applied, thanks!

[1/3] dt-bindings: clock: exynosautov920: add m2m clock definitions
      https://git.kernel.org/krzk/linux/c/4914c17a76047ccbde24397cf9d406558183d756

Best regards,
-- 
Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>

[PATCH v2 2/3] clk: samsung: exynosautov920: add clock support

[Raghav Sharma]

Add support for CMU_M2M which provides clocks to M2M block, and
register the required compatible and cmu_info for the same.

Signed-off-by: Raghav Sharma <raghav.s@samsung.com>
---
 drivers/clk/samsung/clk-exynosautov920.c | 45 ++++++++++++++++++++++++
 1 file changed, 45 insertions(+)

diff --git a/drivers/clk/samsung/clk-exynosautov920.c b/drivers/clk/samsung/clk-exynosautov920.c
index 572b6ace14ac..75deec8bece5 100644
--- a/drivers/clk/samsung/clk-exynosautov920.c
+++ b/drivers/clk/samsung/clk-exynosautov920.c
@@ -27,6 +27,7 @@
 #define CLKS_NR_HSI0			(CLK_DOUT_HSI0_PCIE_APB + 1)
 #define CLKS_NR_HSI1			(CLK_MOUT_HSI1_USBDRD + 1)
 #define CLKS_NR_HSI2			(CLK_DOUT_HSI2_ETHERNET_PTP + 1)
+#define CLKS_NR_M2M                     (CLK_DOUT_M2M_NOCP + 1)
 
 /* ---- CMU_TOP ------------------------------------------------------------ */
 
@@ -1821,6 +1822,47 @@ static const struct samsung_cmu_info hsi2_cmu_info __initconst = {
 	.clk_name               = "noc",
 };
 
+/* ---- CMU_M2M --------------------------------------------------------- */
+
+/* Register Offset definitions for CMU_M2M (0x1a800000) */
+#define PLL_CON0_MUX_CLKCMU_M2M_JPEG_USER       0x600
+#define PLL_CON0_MUX_CLKCMU_M2M_NOC_USER        0x610
+#define CLK_CON_DIV_DIV_CLK_M2M_NOCP            0x1800
+
+static const unsigned long m2m_clk_regs[] __initconst = {
+	PLL_CON0_MUX_CLKCMU_M2M_JPEG_USER,
+	PLL_CON0_MUX_CLKCMU_M2M_NOC_USER,
+	CLK_CON_DIV_DIV_CLK_M2M_NOCP,
+};
+
+/* List of parent clocks for Muxes in CMU_M2M */
+PNAME(mout_clkcmu_m2m_noc_user_p) = { "oscclk", "dout_clkcmu_m2m_noc" };
+PNAME(mout_clkcmu_m2m_jpeg_user_p) = { "oscclk", "dout_clkcmu_m2m_jpeg" };
+
+static const struct samsung_mux_clock m2m_mux_clks[] __initconst = {
+	MUX(CLK_MOUT_M2M_JPEG_USER, "mout_clkcmu_m2m_jpeg_user",
+	    mout_clkcmu_m2m_jpeg_user_p, PLL_CON0_MUX_CLKCMU_M2M_JPEG_USER, 4, 1),
+	MUX(CLK_MOUT_M2M_NOC_USER, "mout_clkcmu_m2m_noc_user",
+	    mout_clkcmu_m2m_noc_user_p, PLL_CON0_MUX_CLKCMU_M2M_NOC_USER, 4, 1),
+};
+
+static const struct samsung_div_clock m2m_div_clks[] __initconst = {
+	DIV(CLK_DOUT_M2M_NOCP, "dout_m2m_nocp",
+	    "mout_clkcmu_m2m_noc_user", CLK_CON_DIV_DIV_CLK_M2M_NOCP,
+	    0, 3),
+};
+
+static const struct samsung_cmu_info m2m_cmu_info __initconst = {
+	.mux_clks               = m2m_mux_clks,
+	.nr_mux_clks            = ARRAY_SIZE(m2m_mux_clks),
+	.div_clks               = m2m_div_clks,
+	.nr_div_clks            = ARRAY_SIZE(m2m_div_clks),
+	.nr_clk_ids             = CLKS_NR_M2M,
+	.clk_regs               = m2m_clk_regs,
+	.nr_clk_regs            = ARRAY_SIZE(m2m_clk_regs),
+	.clk_name               = "noc",
+};
+
 static int __init exynosautov920_cmu_probe(struct platform_device *pdev)
 {
 	const struct samsung_cmu_info *info;
@@ -1851,6 +1893,9 @@ static const struct of_device_id exynosautov920_cmu_of_match[] = {
 	}, {
 		.compatible = "samsung,exynosautov920-cmu-hsi2",
 		.data = &hsi2_cmu_info,
+	}, {
+		.compatible = "samsung,exynosautov920-cmu-m2m",
+		.data = &m2m_cmu_info,
 	},
 	{ }
 };
-- 
2.34.1

RE: [PATCH v2 2/3] clk: samsung: exynosautov920: add clock support

[Alim Akhtar]

Hi Raghav

> -----Original Message-----
> From: Raghav Sharma <raghav.s@samsung.com>
> Sent: Monday, September 15, 2025 3:24 PM
> To: krzk@kernel.org; s.nawrocki@samsung.com; cw00.choi@samsung.com;
> alim.akhtar@samsung.com; mturquette@baylibre.com; sboyd@kernel.org;
> robh@kernel.org; conor+dt@kernel.org; sunyeal.hong@samsung.com;
> shin.son@samsung.com
> Cc: linux-samsung-soc@vger.kernel.org; linux-clk@vger.kernel.org;
> devicetree@vger.kernel.org; linux-arm-kernel@lists.infradead.org; linux-
> kernel@vger.kernel.org; chandan.vn@samsung.com; dev.tailor@samsung.com;
> karthik.sun@samsung.com; Raghav Sharma <raghav.s@samsung.com>
> Subject: [PATCH v2 2/3] clk: samsung: exynosautov920: add clock support
> 
> Add support for CMU_M2M which provides clocks to M2M block, and register
> the required compatible and cmu_info for the same.
> 
> Signed-off-by: Raghav Sharma <raghav.s@samsung.com>
> ---

Reviewed-by: Alim Akhtar <alim.akhtar@samsung.com>

Re: (subset) [PATCH v2 2/3] clk: samsung: exynosautov920: add clock support

[Krzysztof Kozlowski]

On Mon, 15 Sep 2025 15:24:00 +0530, Raghav Sharma wrote:
> Add support for CMU_M2M which provides clocks to M2M block, and
> register the required compatible and cmu_info for the same.
> 
> 

Applied, thanks!

[2/3] clk: samsung: exynosautov920: add clock support
      https://git.kernel.org/krzk/linux/c/ac5d829873c737edae220ee654e423d383163630

Best regards,
-- 
Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>

[PATCH v2 3/3] arm64: dts: exynosautov920: add CMU_M2M clock DT nodes

[Raghav Sharma]

Add required dt node for CMU_M2M block, which provides
clocks for M2M IP

Signed-off-by: Raghav Sharma <raghav.s@samsung.com>
---
 arch/arm64/boot/dts/exynos/exynosautov920.dtsi | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/arch/arm64/boot/dts/exynos/exynosautov920.dtsi b/arch/arm64/boot/dts/exynos/exynosautov920.dtsi
index 0fdf2062930a..d19d71faa6f8 100644
--- a/arch/arm64/boot/dts/exynos/exynosautov920.dtsi
+++ b/arch/arm64/boot/dts/exynos/exynosautov920.dtsi
@@ -1454,6 +1454,19 @@ pinctrl_aud: pinctrl@1a460000 {
 			reg = <0x1a460000 0x10000>;
 		};
 
+		cmu_m2m: clock-controller@1a800000 {
+			compatible = "samsung,exynosautov920-cmu-m2m";
+			reg = <0x1a800000 0x8000>;
+			#clock-cells = <1>;
+
+			clocks = <&xtcxo>,
+				 <&cmu_top DOUT_CLKCMU_M2M_NOC>,
+				 <&cmu_top DOUT_CLKCMU_M2M_JPEG>;
+			clock-names = "oscclk",
+				      "noc",
+				      "jpeg";
+		};
+
 		cmu_cpucl0: clock-controller@1ec00000 {
 			compatible = "samsung,exynosautov920-cmu-cpucl0";
 			reg = <0x1ec00000 0x8000>;
-- 
2.34.1

RE: [PATCH v2 3/3] arm64: dts: exynosautov920: add CMU_M2M clock DT nodes

[Alim Akhtar]

Hi Raghav

> -----Original Message-----
> From: Raghav Sharma <raghav.s@samsung.com>
> Sent: Monday, September 15, 2025 3:24 PM
> To: krzk@kernel.org; s.nawrocki@samsung.com; cw00.choi@samsung.com;
> alim.akhtar@samsung.com; mturquette@baylibre.com; sboyd@kernel.org;
> robh@kernel.org; conor+dt@kernel.org; sunyeal.hong@samsung.com;
> shin.son@samsung.com
> Cc: linux-samsung-soc@vger.kernel.org; linux-clk@vger.kernel.org;
> devicetree@vger.kernel.org; linux-arm-kernel@lists.infradead.org; linux-
> kernel@vger.kernel.org; chandan.vn@samsung.com; dev.tailor@samsung.com;
> karthik.sun@samsung.com; Raghav Sharma <raghav.s@samsung.com>
> Subject: [PATCH v2 3/3] arm64: dts: exynosautov920: add CMU_M2M clock DT
> nodes
> 
> Add required dt node for CMU_M2M block, which provides clocks for M2M IP
> 
> Signed-off-by: Raghav Sharma <raghav.s@samsung.com>
> ---

Reviewed-by: Alim Akhtar <alim.akhtar@samsung.com>

Re: (subset) [PATCH v2 3/3] arm64: dts: exynosautov920: add CMU_M2M clock DT nodes

[Krzysztof Kozlowski]

On Mon, 15 Sep 2025 15:24:01 +0530, Raghav Sharma wrote:
> Add required dt node for CMU_M2M block, which provides
> clocks for M2M IP
> 
> 

Applied, thanks!

[3/3] arm64: dts: exynosautov920: add CMU_M2M clock DT nodes
      https://git.kernel.org/krzk/linux/c/7b0ccabb873de4b4dec3214b2a0ee3c32c326101

Best regards,
-- 
Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>