linux-kernel - Re: [PATCH v11 1/3] dt-bindings: rtc: sophgo: add RTC support for Sophgo CV1800 series SoC

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Message-ID: <t6z6rikut2him5m57b6xubbguw3llczp4i6d5frcpuhlqihf2d@booethzadxsq>
Date: Fri, 14 Feb 2025 17:40:09 +0800
From: Inochi Amaoto <inochiama@...il.com>
To: Alexander Sverdlin <alexander.sverdlin@...il.com>, 
	devicetree@...r.kernel.org, linux-riscv@...ts.infradead.org, linux-rtc@...r.kernel.org
Cc: Jingbao Qiu <qiujingbao.dlmu@...il.com>, 
	Inochi Amaoto <inochiama@...il.com>, alexandre.belloni@...tlin.com, robh@...nel.org, 
	krzysztof.kozlowski+dt@...aro.org, conor+dt@...nel.org, unicorn_wang@...look.com, 
	inochiama@...look.com, paul.walmsley@...ive.com, palmer@...belt.com, 
	aou@...s.berkeley.edu, dlan@...too.org, linux-kernel@...r.kernel.org, 
	Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
Subject: Re: [PATCH v11 1/3] dt-bindings: rtc: sophgo: add RTC support for
 Sophgo CV1800 series SoC

On Thu, Feb 13, 2025 at 10:56:45PM +0100, Alexander Sverdlin wrote:
> From: Jingbao Qiu <qiujingbao.dlmu@...il.com>
> 
> Add RTC devicetree binding for Sophgo CV1800 SoC.
> 
> Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
> Signed-off-by: Jingbao Qiu <qiujingbao.dlmu@...il.com>
> Signed-off-by: Alexander Sverdlin <alexander.sverdlin@...il.com>
> ---
>  .../bindings/rtc/sophgo,cv1800-rtc.yaml       | 53 +++++++++++++++++++
>  1 file changed, 53 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/rtc/sophgo,cv1800-rtc.yaml
> 
> diff --git a/Documentation/devicetree/bindings/rtc/sophgo,cv1800-rtc.yaml b/Documentation/devicetree/bindings/rtc/sophgo,cv1800-rtc.yaml
> new file mode 100644
> index 000000000000..b36b51a69166
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/rtc/sophgo,cv1800-rtc.yaml
> @@ -0,0 +1,53 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/rtc/sophgo,cv1800-rtc.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Real Time Clock of the Sophgo CV1800 SoC
> +
> +description:
> +  Real Time Clock (RTC) is an independently powered module
> +  within the chip, which includes a 32KHz oscillator and a
> +  Power On Reset/POR submodule. It can be used for time display
> +  and timed alarm generation. In addition, the hardware state
> +  machine provides triggering and timing control for chip
> +  power on, off, and reset.
> +
> +maintainers:
> +  - Jingbao Qiu <qiujingbao.dlmu@...il.com>
> +
> +allOf:
> +  - $ref: rtc.yaml#
> +
> +properties:
> +  compatible:
> +    const: sophgo,cv1800-rtc
> +
> +  reg:
> +    maxItems: 1
> +
> +  interrupts:
> +    maxItems: 1
> +
> +  clocks:
> +    maxItems: 1
> +
> +required:
> +  - compatible
> +  - reg
> +  - interrupts
> +  - clocks
> +
> +unevaluatedProperties: false
> +

> +examples:
> +  - |
> +    #include <dt-bindings/interrupt-controller/irq.h>
> +
> +    rtc@...5000 {
> +        compatible = "sophgo,cv1800-rtc";
> +        reg = <0x5025000 0x2000>;
> +        interrupts = <17 IRQ_TYPE_LEVEL_HIGH>;
> +        clocks = <&osc>;
> +    };
> -- 

Just for curiosity, Do you leave a way to implement the
8051 subsys, since its registers are in rtc. (You can
check the chapter "8051 subsystem" of the SG2002, which
can be found at https://github.com/sophgo/sophgo-doc).

Regards,
Inochi