[PATCH 0/2] rtc: add amlogic C3 RTC node

[PATCH 0/2] rtc: add amlogic C3 RTC node

[Xianwei Zhao via B4 Relay]

Add C3 rtc compatible string and device node.

Signed-off-by: Xianwei Zhao <xianwei.zhao@amlogic.com>
---
Xianwei Zhao (2):
      dt-bindings: rtc: amlogic,a4-rtc: Add compatible string for C3
      arm64: dts: amlogic: C3: Add RTC controller node

 .../devicetree/bindings/rtc/amlogic,a4-rtc.yaml          | 11 ++++++++---
 arch/arm64/boot/dts/amlogic/amlogic-c3.dtsi              | 16 ++++++++++++++++
 2 files changed, 24 insertions(+), 3 deletions(-)
---
base-commit: 0bafe291cb429d39b5ff70bcf7b2f3ab026dcb02
change-id: 20250717-rtc-c3-node-bb78598d91b3

Best regards,
-- 
Xianwei Zhao <xianwei.zhao@amlogic.com>



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[PATCH 1/2] dt-bindings: rtc: amlogic,a4-rtc: Add compatible string for C3

[Xianwei Zhao via B4 Relay]

From: Xianwei Zhao <xianwei.zhao@amlogic.com>

Amlogic C3 SoCs uses the same rtc controller as A5 SoCs. There is
no need for an extra compatible line in the driver, but add C3
compatible line for documentation.

Signed-off-by: Xianwei Zhao <xianwei.zhao@amlogic.com>
---
 Documentation/devicetree/bindings/rtc/amlogic,a4-rtc.yaml | 11 ++++++++---
 1 file changed, 8 insertions(+), 3 deletions(-)

diff --git a/Documentation/devicetree/bindings/rtc/amlogic,a4-rtc.yaml b/Documentation/devicetree/bindings/rtc/amlogic,a4-rtc.yaml
index 5d3ac737abcb..e61f22eca85b 100644
--- a/Documentation/devicetree/bindings/rtc/amlogic,a4-rtc.yaml
+++ b/Documentation/devicetree/bindings/rtc/amlogic,a4-rtc.yaml
@@ -16,9 +16,14 @@ allOf:
 
 properties:
   compatible:
-    enum:
-      - amlogic,a4-rtc
-      - amlogic,a5-rtc
+    oneOf:
+      - enum:
+          - amlogic,a4-rtc
+          - amlogic,a5-rtc
+      - items:
+          - enum:
+              - amlogic,c3-rtc
+          - const: amlogic,a5-rtc
 
   reg:
     maxItems: 1

-- 
2.37.1



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Re: [PATCH 1/2] dt-bindings: rtc: amlogic,a4-rtc: Add compatible string for C3

[Rob Herring (Arm)]

On Thu, 17 Jul 2025 17:38:37 +0800, Xianwei Zhao wrote:
> Amlogic C3 SoCs uses the same rtc controller as A5 SoCs. There is
> no need for an extra compatible line in the driver, but add C3
> compatible line for documentation.
> 
> Signed-off-by: Xianwei Zhao <xianwei.zhao@amlogic.com>
> ---
>  Documentation/devicetree/bindings/rtc/amlogic,a4-rtc.yaml | 11 ++++++++---
>  1 file changed, 8 insertions(+), 3 deletions(-)
> 

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


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Re: (subset) [PATCH 1/2] dt-bindings: rtc: amlogic,a4-rtc: Add compatible string for C3

[Alexandre Belloni]

On Thu, 17 Jul 2025 17:38:37 +0800, Xianwei Zhao wrote:
> Amlogic C3 SoCs uses the same rtc controller as A5 SoCs. There is
> no need for an extra compatible line in the driver, but add C3
> compatible line for documentation.
> 
> 

Applied, thanks!

[1/2] dt-bindings: rtc: amlogic,a4-rtc: Add compatible string for C3
      https://git.kernel.org/abelloni/c/db22fd8880a2

Best regards,

-- 
Alexandre Belloni, co-owner and COO, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com

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[PATCH 2/2] arm64: dts: amlogic: C3: Add RTC controller node

[Xianwei Zhao via B4 Relay]

From: Xianwei Zhao <xianwei.zhao@amlogic.com>

Add the RTC controller node for C3 SoC family.

Signed-off-by: Xianwei Zhao <xianwei.zhao@amlogic.com>
---
 arch/arm64/boot/dts/amlogic/amlogic-c3.dtsi | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/arch/arm64/boot/dts/amlogic/amlogic-c3.dtsi b/arch/arm64/boot/dts/amlogic/amlogic-c3.dtsi
index cb9ea3ca6ee0..b81bffac7732 100644
--- a/arch/arm64/boot/dts/amlogic/amlogic-c3.dtsi
+++ b/arch/arm64/boot/dts/amlogic/amlogic-c3.dtsi
@@ -53,6 +53,13 @@ xtal: xtal-clk {
 		#clock-cells = <0>;
 	};
 
+	xtal_32k: xtal-clk-32k {
+		compatible = "fixed-clock";
+		clock-frequency = <32768>;
+		clock-output-names = "xtal_32k";
+		#clock-cells = <0>;
+	};
+
 	sm: secure-monitor {
 		compatible = "amlogic,meson-gxbb-sm";
 
@@ -967,6 +974,15 @@ nand: nand-controller@8d000 {
 				clock-names = "core", "device";
 				status = "disabled";
 			};
+
+			rtc@9a000 {
+				compatible = "amlogic,c3-rtc",
+					     "amlogic,a5-rtc";
+				reg = <0x0 0x9a000 0x0 0x38>;
+				interrupts = <GIC_SPI 131 IRQ_TYPE_EDGE_RISING>;
+				clocks = <&xtal_32k>, <&clkc_periphs CLKID_SYS_RTC>;
+				clock-names = "osc", "sys";
+			};
 		};
 
 		ethmac: ethernet@fdc00000 {

-- 
2.37.1



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Re: [PATCH 2/2] arm64: dts: amlogic: C3: Add RTC controller node

[Neil Armstrong]

On 17/07/2025 11:38, Xianwei Zhao via B4 Relay wrote:
> From: Xianwei Zhao <xianwei.zhao@amlogic.com>
> 
> Add the RTC controller node for C3 SoC family.
> 
> Signed-off-by: Xianwei Zhao <xianwei.zhao@amlogic.com>
> ---
>   arch/arm64/boot/dts/amlogic/amlogic-c3.dtsi | 16 ++++++++++++++++
>   1 file changed, 16 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/amlogic/amlogic-c3.dtsi b/arch/arm64/boot/dts/amlogic/amlogic-c3.dtsi
> index cb9ea3ca6ee0..b81bffac7732 100644
> --- a/arch/arm64/boot/dts/amlogic/amlogic-c3.dtsi
> +++ b/arch/arm64/boot/dts/amlogic/amlogic-c3.dtsi
> @@ -53,6 +53,13 @@ xtal: xtal-clk {
>   		#clock-cells = <0>;
>   	};
>   
> +	xtal_32k: xtal-clk-32k {
> +		compatible = "fixed-clock";
> +		clock-frequency = <32768>;
> +		clock-output-names = "xtal_32k";
> +		#clock-cells = <0>;
> +	};
> +
>   	sm: secure-monitor {
>   		compatible = "amlogic,meson-gxbb-sm";
>   
> @@ -967,6 +974,15 @@ nand: nand-controller@8d000 {
>   				clock-names = "core", "device";
>   				status = "disabled";
>   			};
> +
> +			rtc@9a000 {
> +				compatible = "amlogic,c3-rtc",
> +					     "amlogic,a5-rtc";
> +				reg = <0x0 0x9a000 0x0 0x38>;
> +				interrupts = <GIC_SPI 131 IRQ_TYPE_EDGE_RISING>;
> +				clocks = <&xtal_32k>, <&clkc_periphs CLKID_SYS_RTC>;
> +				clock-names = "osc", "sys";
> +			};
>   		};
>   
>   		ethmac: ethernet@fdc00000 {
> 

Reviewed-by: Neil Armstrong <neil.armstrong@linaro.org>

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Re: (subset) [PATCH 0/2] rtc: add amlogic C3 RTC node

[Neil Armstrong]

Hi,

On Thu, 17 Jul 2025 17:38:36 +0800, Xianwei Zhao wrote:
> Add C3 rtc compatible string and device node.
> 
> 

Thanks, Applied to https://git.kernel.org/pub/scm/linux/kernel/git/amlogic/linux.git (v6.18/arm64-dt)

[2/2] arm64: dts: amlogic: C3: Add RTC controller node
      https://git.kernel.org/amlogic/c/59b4c260582a74e641c973d016725e5dca32f300

These changes has been applied on the intermediate git tree [1].

The v6.18/arm64-dt branch will then be sent via a formal Pull Request to the Linux SoC maintainers
for inclusion in their intermediate git branches in order to be sent to Linus during
the next merge window, or sooner if it's a set of fixes.

In the cases of fixes, those will be merged in the current release candidate
kernel and as soon they appear on the Linux master branch they will be
backported to the previous Stable and Long-Stable kernels [2].

The intermediate git branches are merged daily in the linux-next tree [3],
people are encouraged testing these pre-release kernels and report issues on the
relevant mailing-lists.

If problems are discovered on those changes, please submit a signed-off-by revert
patch followed by a corrective changeset.

[1] https://git.kernel.org/pub/scm/linux/kernel/git/amlogic/linux.git
[2] https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
[3] https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git

-- 
Neil


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