* [PATCH] arm64: versal-net: Update rtc calibration value
@ 2025-07-10 6:13 Harini T
2025-07-18 7:23 ` Michal Simek
0 siblings, 1 reply; 2+ messages in thread
From: Harini T @ 2025-07-10 6:13 UTC (permalink / raw)
To: robh, krzk+dt, conor+dt, michal.simek
Cc: devicetree, linux-arm-kernel, linux-kernel, git, Harini T
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@amd.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@f1040000 {
--
2.17.1
^ permalink raw reply [flat|nested] 2+ messages in thread* Re: [PATCH] arm64: versal-net: Update rtc calibration value
2025-07-10 6:13 [PATCH] arm64: versal-net: Update rtc calibration value Harini T
@ 2025-07-18 7:23 ` Michal Simek
0 siblings, 0 replies; 2+ messages in thread
From: Michal Simek @ 2025-07-18 7:23 UTC (permalink / raw)
To: Harini T, robh, krzk+dt, conor+dt
Cc: devicetree, linux-arm-kernel, linux-kernel, git
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@amd.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@f1040000 {
Applied.
M
^ permalink raw reply [flat|nested] 2+ messages in thread
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2025-07-10 6:13 [PATCH] arm64: versal-net: Update rtc calibration value Harini T
2025-07-18 7:23 ` Michal Simek
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