linux-kernel - Re: [PATCH] arm64: versal-net: Update rtc calibration value

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Message-ID: <8be48e66-792f-46cb-b5ec-036f450ca925@amd.com>
Date: Fri, 18 Jul 2025 09:23:28 +0200
From: Michal Simek <michal.simek@....com>
To: Harini T <harini.t@....com>, robh@...nel.org, krzk+dt@...nel.org,
 conor+dt@...nel.org
Cc: devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
 linux-kernel@...r.kernel.org, git@....com
Subject: Re: [PATCH] arm64: versal-net: Update rtc calibration value



On 7/10/25 08:13, Harini T wrote:
> As per the design specification
> "The 16-bit Seconds Calibration Value represents the number of
> Oscillator Ticks that are required to measure the largest time period
> that is less than or equal to 1 second.
> For an oscillator that is 32.768kHz, this value will be 0x7FFF."
> 
> Signed-off-by: Harini T <harini.t@....com>
> ---
>   arch/arm64/boot/dts/xilinx/versal-net.dtsi | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/arch/arm64/boot/dts/xilinx/versal-net.dtsi b/arch/arm64/boot/dts/xilinx/versal-net.dtsi
> index fc9f49e57385..c037a7819967 100644
> --- a/arch/arm64/boot/dts/xilinx/versal-net.dtsi
> +++ b/arch/arm64/boot/dts/xilinx/versal-net.dtsi
> @@ -556,7 +556,7 @@
>   			reg = <0 0xf12a0000 0 0x100>;
>   			interrupts = <0 200 4>, <0 201 4>;
>   			interrupt-names = "alarm", "sec";
> -			calibration = <0x8000>;
> +			calibration = <0x7FFF>;
>   		};
>   
>   		sdhci0: mmc@...40000 {

Applied.
M