linux-kernel - Re: [PATCH 5/5] riscv: dts: thead: Add XuanTie TH1520 RTC device node

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Date: Fri, 12 Apr 2024 11:19:37 +0200
From: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To: wefu@...hat.com, jszhang@...nel.org, alexandre.belloni@...tlin.com,
 robh@...nel.org, krzysztof.kozlowski+dt@...aro.org, conor+dt@...nel.org,
 guoren@...nel.org, paul.walmsley@...ive.com, palmer@...belt.com,
 aou@...s.berkeley.edu
Cc: linux-riscv@...ts.infradead.org, devicetree@...r.kernel.org,
 linux-kernel@...r.kernel.org, linux-rtc@...r.kernel.org
Subject: Re: [PATCH 5/5] riscv: dts: thead: Add XuanTie TH1520 RTC device node

On 12/04/2024 10:01, wefu@...hat.com wrote:
> From: Wei Fu <wefu@...hat.com>
> 
> Add nodes for the XuanTie TH1520 RTC device node on the XuanTie TH1520 Soc.
> 
> Signed-off-by: Wei Fu <wefu@...hat.com>
> ---
>  arch/riscv/boot/dts/thead/th1520.dtsi | 11 +++++++++++
>  1 file changed, 11 insertions(+)
> 
> diff --git a/arch/riscv/boot/dts/thead/th1520.dtsi b/arch/riscv/boot/dts/thead/th1520.dtsi
> index cd6bc89a240c..62e588dbc942 100644
> --- a/arch/riscv/boot/dts/thead/th1520.dtsi
> +++ b/arch/riscv/boot/dts/thead/th1520.dtsi
> @@ -463,6 +463,17 @@ timer7: timer@...fc3303c {
>  			status = "disabled";
>  		};
>  
> +		rtc: rtc@...ff40000 {
> +			compatible = "snps,dw-apb-rtc";

Please run scripts/checkpatch.pl and fix reported warnings. Then please
run `scripts/checkpatch.pl --strict` and (probably) fix more warnings.
Some warnings can be ignored, especially from --strict run, but the code
here looks like it needs a fix. Feel free to get in touch if the warning
is not clear.

> +			reg = <0xff 0xfff40000 0x0 0x1000>;
> +			interrupts = <74 IRQ_TYPE_LEVEL_HIGH>;
> +			clocks = <&osc_32k>;
> +			clock-names = "osc_32k";
> +			wakeup-source;
> +			prescaler = <0x8000>;

What is 0x8000? Why is it in hex if this divides the clock? Clock is in
Hz and we all operate on decimal units.

> +			status = "okay";

Drop, please don't upstream directly downstream code.

> +		};
> +
>  		gpio@...ff41000 {
>  			compatible = "snps,dw-apb-gpio";
>  			reg = <0xff 0xfff41000 0x0 0x1000>;

Best regards,
Krzysztof