linux-kernel - [PATCH 3/6] arm64: dts: imx8mq-librem5: Enable SNVS RTC

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Message-Id: <20260105-l5-dtb-fixes-v1-3-f491881a7fe7@puri.sm>
Date: Mon, 05 Jan 2026 21:39:40 +0100
From: Sebastian Krzyszkowiak via B4 Relay <devnull+sebastian.krzyszkowiak.puri.sm@...nel.org>
To: Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>, Shawn Guo <shawnguo@...nel.org>, 
 Sascha Hauer <s.hauer@...gutronix.de>, 
 Pengutronix Kernel Team <kernel@...gutronix.de>, 
 Fabio Estevam <festevam@...il.com>
Cc: devicetree@...r.kernel.org, imx@...ts.linux.dev, 
 linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org, 
 kernel@...i.sm, Sebastian Krzyszkowiak <sebastian.krzyszkowiak@...i.sm>
Subject: [PATCH 3/6] arm64: dts: imx8mq-librem5: Enable SNVS RTC

From: Sebastian Krzyszkowiak <sebastian.krzyszkowiak@...i.sm>

It has been disabled because it was being used for system clock instead
of the discrete RTC. However, SNVS has some features that the discrete
RTC does not, such as being able to turn the device on. Solve that issue
with aliases instead and reenable SNVS RTC.

Signed-off-by: Sebastian Krzyszkowiak <sebastian.krzyszkowiak@...i.sm>
---
 arch/arm64/boot/dts/freescale/imx8mq-librem5.dtsi | 11 ++++++-----
 1 file changed, 6 insertions(+), 5 deletions(-)

diff --git a/arch/arm64/boot/dts/freescale/imx8mq-librem5.dtsi b/arch/arm64/boot/dts/freescale/imx8mq-librem5.dtsi
index b92b5f7b2bd7..8c37b1293699 100644
--- a/arch/arm64/boot/dts/freescale/imx8mq-librem5.dtsi
+++ b/arch/arm64/boot/dts/freescale/imx8mq-librem5.dtsi
@@ -17,6 +17,11 @@ / {
 	compatible = "purism,librem5", "fsl,imx8mq";
 	chassis-type = "handset";
 
+	aliases {
+		rtc0 = &rtc;
+		rtc1 = &snvs_rtc;
+	};
+
 	backlight_dsi: backlight-dsi {
 		compatible = "led-backlight";
 		leds = <&led_backlight>;
@@ -1001,7 +1006,7 @@ ldo7_reg: LDO7 {
 		};
 	};
 
-	rtc@68 {
+	rtc: rtc@68 {
 		compatible = "microcrystal,rv4162";
 		reg = <0x68>;
 		pinctrl-names = "default";
@@ -1316,10 +1321,6 @@ &snvs_pwrkey {
 	status = "okay";
 };
 
-&snvs_rtc {
-	status = "disabled";
-};
-
 &uart1 { /* console */
 	pinctrl-names = "default";
 	pinctrl-0 = <&pinctrl_uart1>;

-- 
2.52.0