* [PATCH] arm64: tegra: Fix RTC aliases
@ 2026-03-05 15:16 Jon Hunter
2026-03-20 22:57 ` Thierry Reding
0 siblings, 1 reply; 2+ messages in thread
From: Jon Hunter @ 2026-03-05 15:16 UTC (permalink / raw)
To: Rob Herring, Krzysztof Kozlowski, Conor Dooley, Thierry Reding
Cc: devicetree, linux-tegra, Jon Hunter
The following warning is observed on the Tegra234 Jetson platforms ...
rtc-nvidia-vrs10 4-003c: /aliases ID 0 not available
This happens because the 'rtc@c2a0000' device is registered before the
vrs10 RTC and so is assigned the 'rtc0' alias. We want the vrs10 RTC to
be the default RTC because this RTC maintains time across power cycles.
Fix this by adding a 'rtc1' alias for the 'rtc@c2a0000' device.
Fixes: b1806f2b4e78 ("arm64: tegra: Add device-tree node for NVVRS RTC")
Signed-off-by: Jon Hunter <jonathanh@nvidia.com>
---
arch/arm64/boot/dts/nvidia/tegra234-p3701.dtsi | 1 +
arch/arm64/boot/dts/nvidia/tegra234-p3767.dtsi | 1 +
2 files changed, 2 insertions(+)
diff --git a/arch/arm64/boot/dts/nvidia/tegra234-p3701.dtsi b/arch/arm64/boot/dts/nvidia/tegra234-p3701.dtsi
index 58bf55c0e414..c10d041c183b 100644
--- a/arch/arm64/boot/dts/nvidia/tegra234-p3701.dtsi
+++ b/arch/arm64/boot/dts/nvidia/tegra234-p3701.dtsi
@@ -9,6 +9,7 @@ aliases {
mmc0 = "/bus@0/mmc@3460000";
mmc1 = "/bus@0/mmc@3400000";
rtc0 = "/bpmp/i2c/pmic@3c";
+ rtc1 = "/bus@0/rtc@c2a0000";
};
bus@0 {
diff --git a/arch/arm64/boot/dts/nvidia/tegra234-p3767.dtsi b/arch/arm64/boot/dts/nvidia/tegra234-p3767.dtsi
index ab391a71c3d3..9e9e80d57623 100644
--- a/arch/arm64/boot/dts/nvidia/tegra234-p3767.dtsi
+++ b/arch/arm64/boot/dts/nvidia/tegra234-p3767.dtsi
@@ -8,6 +8,7 @@ / {
aliases {
mmc0 = "/bus@0/mmc@3400000";
rtc0 = "/bpmp/i2c/pmic@3c";
+ rtc1 = "/bus@0/rtc@c2a0000";
};
bus@0 {
--
2.43.0
^ permalink raw reply related [flat|nested] 2+ messages in thread
* Re: [PATCH] arm64: tegra: Fix RTC aliases
2026-03-05 15:16 [PATCH] arm64: tegra: Fix RTC aliases Jon Hunter
@ 2026-03-20 22:57 ` Thierry Reding
0 siblings, 0 replies; 2+ messages in thread
From: Thierry Reding @ 2026-03-20 22:57 UTC (permalink / raw)
To: Rob Herring, Krzysztof Kozlowski, Conor Dooley, Thierry Reding,
Jon Hunter
Cc: devicetree, linux-tegra
From: Thierry Reding <treding@nvidia.com>
On Thu, 05 Mar 2026 15:16:59 +0000, Jon Hunter wrote:
> The following warning is observed on the Tegra234 Jetson platforms ...
>
> rtc-nvidia-vrs10 4-003c: /aliases ID 0 not available
>
> This happens because the 'rtc@c2a0000' device is registered before the
> vrs10 RTC and so is assigned the 'rtc0' alias. We want the vrs10 RTC to
> be the default RTC because this RTC maintains time across power cycles.
> Fix this by adding a 'rtc1' alias for the 'rtc@c2a0000' device.
>
> [...]
Applied, thanks!
[1/1] arm64: tegra: Fix RTC aliases
commit: 13346b553b49952f0d2b0b5a07f9f1492b811dfa
Best regards,
--
Thierry Reding <treding@nvidia.com>
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2026-03-20 22:57 ` Thierry Reding
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