[PATCH v1 0/3] Add clock support for CMU_M2M

[PATCH v1 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>
---

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: b7d4e259682caccb51a25283655f2c8f02e32d23
-- 
2.34.1

[PATCH v1 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

[PATCH v1 2/3] clk: samsung: exynosautov920: add block m2m clock support

[Raghav Sharma]

Register compatible and cmu_info data to support clocks.
CMU_M2M, this provides clocks for M2M block

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

[PATCH v1 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..086d6bbc18b8 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@0x1a800000 {
+			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 v1 3/3] arm64: dts: exynosautov920: add CMU_M2M clock DT nodes

[Krzysztof Kozlowski]

On 08/08/2025 16:21, Raghav Sharma wrote:
> 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..086d6bbc18b8 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@0x1a800000 {


Are you sure this satisfies tests required by Samsung SoC maintainer
profile?

Best regards,
Krzysztof

RE: [PATCH v1 3/3] arm64: dts: exynosautov920: add CMU_M2M clock DT nodes

[Raghav Sharma]

Hi Krzysztof

> -----Original Message-----
> From: Krzysztof Kozlowski <krzk@kernel.org>
> Sent: Monday, August 11, 2025 12:19 PM
> To: Raghav Sharma <raghav.s@samsung.com>; s.nawrocki@samsung.com;
> cw00.choi@samsung.com; mturquette@baylibre.com; sboyd@kernel.org;
> robh@kernel.org; conor+dt@kernel.org; sunyeal.hong@samsung.com;
> shin.son@samsung.com; alim.akhtar@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; dev.tailor@samsung.com; chandan.vn@samsung.com;
> karthik.sun@samsung.com
> Subject: Re: [PATCH v1 3/3] arm64: dts: exynosautov920: add CMU_M2M clock
> DT nodes
> 
> On 08/08/2025 16:21, Raghav Sharma wrote:
> > 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..086d6bbc18b8 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@0x1a800000 {
> 
> 
> Are you sure this satisfies tests required by Samsung SoC maintainer profile?
> 
Sorry for delay in reply, I was off for some time. 
I understood the requirement here and thanks for your guidance on the other thread. 
I shall post the new version post fixing the compilation warnings.

> Best regards,
> Krzysztof